EPA/600/4-86/007b
                                              June 1986
                      CHARACTERISTICS OF LAKES

                    IN THE EASTERN UNITED STATES


        VOLUME II:  LAKES SAMPLED AND DESCRIPTIVE STATISTICS

                 FOR PHYSICAL AND CHEMICAL VARIABLES
                                 By:

               W. S. Overton, P. Kanciruk, L. A. Hook,
             J. M. Eilers, D. H. Landers, D. F. Brakke,
  D. J. Blick, Jr., R. A. Linthurst, M. D. DeHaan and J. M. Omernik
                        A Contribution to the
           National Acid Precipitation Assessment Program
                U. S. Environmental Protection Agency
    Office of Research and Development, Washington, D. C.  20460
     Environmental Research Laboratory, Corvallis, Oregon  97333
Environmental Monitoring Systems Laboratory, Las Vegas, Nevada  89109

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                                   NOTICE


     The Information in this document has been funded wholly or in part by
the U. S. Environmental Protection Agency under Contract No. 68-03-3249 and
68-03-3050 to Lockheed Engineering and Management Services Company, Inc.,
No. 68-02-3889 to Radian Corporation, No. 68-03-3246 to Northrop Services,
Inc., and Interagency Agreement No. 40-1441-84 with the U. S. Department of
Energy.  It has been subject to the Agency's peer and administrative review,
and it has been approved for publication as an EPA document.

     Mention of corporation names, trade names or commercial products does
not constitute endorsement or recommendation for use.

Proper citation of this document is as follows:

Linthurst1, R. A., D. H. Landers2, J. M. Eilers3, D. F. Brakke4,
W. S. Overton*, E. P. Meier* and R. E. Crowe*.  Characteristics of Lakes in
the Eastern United States.  Volume I:  Population Descriptions and
Physico-Chemical Relationships.  EPA/600/4-86/007a, U. S. Environmental
Protection Agency, Washington, D.C., 1986, 136 pp.
                           7            8
Overton, W. S., P. Kanciruk , L. A. Hook , J. M. Eilers, D. H. Landers,
D. F. Brakke, D. J. BHck3, Jr., R. A. Linthurst, M. D. DeHaan3, and
J. M. Omernik9.  Characteristics of Lakes in the Eastern United States.
Volume II:  Lakes Sampled and Descriptive Statistics for Physical and
Chemical Variables.  EPA/600/4-86/007b, U. S. Environmental Protection
Agency, Washington, D.C., 1986, 374 pp.
                                        o
Kanciruk, P., J. M. Eilers, R. A. McCord , D. H. Landers, D. F. Brakke and
R. A. Linthurst.  Characteristics of Lakes in the Eastern United States.
Volume III:  Data Compendium of Site Characteristics and Chemical Variables.
EPA/600/4-86/007c, U. S. Environmental Protection Agency, Washington, D.C.,
1986, 439 pp.
 U. S. EPA Office of Research and Development, 401 M Street, S.W.,
 Washington, D.C.  20460.  Present address:  U. S. EPA Environmental
 Monitoring Systems Laboratory, Mail-Drop 39, Research Triangle Park,
 North Carolina  27711.

2
 State University of New York, State University Research Center
 at Oswego, 300 Washington Blvd., Oswego, New York  13126.
 Present address:  U. S. EPA Environmental Research Laboratory,
 200 S.W. 35th Street, Corvail 1s, Oregon  97333.


 Northrop Services, Inc., U. S. EPA Environmental Research Laboratory,
 200 S.W. 35th Street, Corvallis, Oregon  97333.
                                    ii

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4Western Washington University, Institute for Watershed Studies,
 Environmental Sciences Bldg., Room 600, Bellingham, Washington  98225.

50regqn State University, Department of Statistics, Kidder No. 8, Corvallis,
 Oregon  97331.

6U. S. EPA Environmental Monitoring Systems Laboratory, 944 E. Harmon
 Avenue, Las Vegas, Nevada  89114.

Environmental Sciences Division, Oak Ridge National Laboratory, Post
 Office Box X, Oak Ridge, Tennessee  37831.  Operated by Martin
 Marietta Energy Systems, Inc., under Contract No. DE-AC05-840R21400
 for the U. S. Department of  Energy.
 Oak Ridge, Tennessee  37831.

9U. S. EPA Environmental Research Laboratory, 200 S.W. 35th Street,
 Corvallis, Oregon  97333.


     Inquiries regarding the availability of the Eastern  Lake  Survey
Phase  I data base should be directed,  in writing, to:

               Chief, Air  Branch
               U. S. EPA Environmental Research Laboratory
               200  S.W. 35th Street
               Corvallis,  Oregon  97333
                                   m

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                              RELATED DOCUMENTS
 Anonymous.   National  Surface Water Survey,  National  Lake Survey -  Phase I
 Research  Plan.   U.  S.  Environmental  Protection  Agency,  Washington,  D.C.,  '
 (internal document),  1984.                                              '

 Best,  M.  D.,  L.  W.  Creelman,  S.  K.  Drouse and D. J.  Chaloud.   National
 Surface Water Survey,  Eastern Lake Survey -  Phase  I,  Quality  Assurance
 Report.   EPA/600/4-86/011,  U.  S.  Environmental  Protection Agency  Las Vegas,
 Nevada, 1986.

 Drouse, S.  K., D. C. J.  Hillman,  L.  W. Creelman, J.  F.  Potter and
 S. J.  Simon.  National Surface Water Survey, Eastern  Lake Survey -  Phase I,
 Quality Assurance Plan.   EPA/600/4-86/008, U. S. Environmental  Protection
 Agency, Las  Vegas,  Nevada,  1986.

 Eilers, J.  M., D. J. Blick,  Jr.  and  M. D. DeHaan.  National Surface Water
 Survey, Eastern  Lake Survey  -  Phase  I.  Validation of the Eastern Lake
 Survey -  Phase I Data  Base.   U.  S.  Environmental Protection Agency,
 Con/all is, Oregon,  1986.

 Hillman, D. C. J.,  J.  F.  Potter  and  S. J. Simon.  National Surface Water
 rDfl/^AJaic/nnoLaHe ^UTy  "  Phase  !> AnaWcal Methods  Manual.
 EPA/600/4-86/009, U. S.  Environmental Protection Agency,  Las  Vegas, Nevada,


 Kanciruk,  P., R. A. McCord, L. A. Hook and M. J. Gentry.   National  Surface
 Water Survey, Eastern  Lake Survey -  Phase I, Data Base Dictionary.   Oak
 Ridge National Laboratory, Technical Manual  ORNL, 1986.

Morris, F. A., D. V. Peck, M. B.  Bonoff and K.  J. Cabbie.  National Surface
Water Survey, Eastern Lake Survey - Phase I, Field Operations Report
EPA/600/4-86/010, U. S. Environmental Protection Agency  Las Vegas   Nevada,
Overton, W  S.
                National Surface Water Survey,  Eastern Lake Survey -

                                                  Ptection Agency,
            dcuments  are  in draft  form at  the time of this
                                    iv

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                              VOLUME I CONTENTS

Section                                                               Page

NOTICE	    11

PREFACE	 . . . o	o	Hi

VOLUME II CONTENTS	    1x

VOLUME III CONTENTS  	     x

FIGURES	    x1

TABLES	    xv

RELATED DOCUMENTS	."....   xix

CONTRIBUTORS 	    xx

ACKNOWLEDGMENTS	xxii

EXECUTIVE SUMMARY  	   xxv

1.   INTRODUCTION  	     1

2.   METHODS	     3

     2.1  DESIGN	     3
          2.1.1  Data Quality Objectives	     3
          2.1.2  Lake Representation	     3
          2.1.3  Statistical Design  	     3
          2.1.4  Identification of Study Area  	     4

     2.2  LAKE SELECTION	     4
          2.2.1  Delineation of Strata.  	     4
          2.2.2  Development of the Map  Population and  Frame.  ...     4
          2.2.3  Probability Sample  	     6
          2.2.4  Identification and Refinement of Frame
                   Population 	     6
          2.2.5  Special  Interest Lakes  	     9
          2.2.6  Final  Lake Lists and  Maps	     9

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                        VOLUME I CONTENTS (Continued)

Section                                                               Page

     2.3  APPLICATIONS OF THE DESIGN	    10
          2.3.1  Defining the Target Population 	    10
          2.3.2  Estimating the Target Population Size and
                   Associated Variance from Sample Data 	    11
          2.3.3  Subpopulations	    12
          2.3.4  Restrictions	    13

     2.4  LAKE CHARACTERIZATION	    13
          2.4.1  Lake Area and Elevation	    13
          2.4.2  Watershed Area	    13
          2.4.3  Lake Type	    13

     2.5  WATER SAMPLE PARAMETERS AND ANALYTICAL METHODOLOGY  ...    14

     2.6  FIELD METHODS	    14
          2.6.1  Site Description	    17
          2.6.2  In Situ Measurements	    17
          2.6.3  Collection of Water Samples  	    17
          2.6.4  Field Laboratory Activities  	    17

     2.7  ANALYTICAL SUPPORT  	    20

     2.8  DATA BASE MANAGEMENT	    20
          2.8.1  Overview	    20
          2.8.2  Data Base Design and Data Flow   	    20
          2.8.3  Data Base Structure	    22

3.   QUALITY ASSURANCE  	    23

     3.1  PREPARATION FOR THE SURVEY	    23

     3.2  IMPLEMENTATION OF QUALITY ASSURANCE/QUALITY CONTROL
            ACTIVITIES	    23

     3.3  DATA VERIFICATION AND VALIDATION	    23
          3.3.1  Verification	    24
          3.3.2  Validation	    26

     3.4  DEVELOPMENT OF FINAL DATA SET	    27

     3.5  QUALITY ASSURANCE/QUALITY CONTROL RESULTS 	    28
          3.5.1  Site Confirmation and Characterization 	    28
          3.5.2  Evaluation of QA Sample Data	    28
                                     VI

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                        VOLUME I CONTENTS (Continued)

Section                                                               Page

4.   RESULTS OF POPULATION ESTIMATES  	    32

     4.1  DATA PRESENTATION AND CONSIDERATIONS  	    32
          4.1.1  Presentation	    32
          4.1.2  Design Considerations  	    32
                 4.1.2.1  Design Constraints  	    32
                 4.1.2.2  Data Quality  	    33

     4.2  DESCRIPTION OF THE TARGET POPULATION	    33
          4.2.1  Number of Lakes Sampled  	 	    33
          4.2.2  Treatment of Large, Shallow and
                 Thermally-Stratified Lakes 	    35
          4.2.3  Target Population and Population Estimates ....    35

     4.3  DESCRIPTIVE STATISTICS AND CUMULATIVE DISTRIBUTIONS ...    36
          4.3.1  Population Distributions 	    36
          4.3.2  Definitions of Descriptive Statistics:
                 Interpretation of F(x) and G(x) Data Output  ...    36
                 4.3.2.1  Distributions 	    45
                 4.3.2.2  Statistics  	    45
          4.3.3  Comparisons of Distributions 	    46
          4.3.4  Interpretation of Alkalinity Map Classes 	    46

     4.4  PHYSICAL CHARACTERISTICS OF REGIONAL LAKE POPULATIONS .  .    49
          4.4.1  Northeast	    49
          4.4.2  Upper Midwest	    49
          4.4.3  Southeast	    49
                 4.4.3.1  Southern Blue Ridge - Subregion 3A  . .  .    49
                 4.4.3.2  Florida - Subregion 3B  	    50

     4.5  REGIONAL, SUBREGIONAL AND STATE POPULATION ESTIMATES:
          ANC AND pH	    50
          4.5.1  Add Neutralizing Capacity	    50
                 4.5.1.1  Reference Values  	    50
                 4.5.1.2  Northeast 	    50
                 4.5.1.3  Upper Midwest 	    51
                 4.5.1.4  Southeast 	    52
                 4.5.1.5  Estimates by State for ANC	    52
                 4.5.1.6  Stratified and Shallow Lakes  	    53
                                     vll

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                        VOLUME I CONTENTS (Continued)

Section                                                               Page

          4.5.2  pH . . .	    55
                 4.5.2.1  Reference Values  	    55
                 4.5.2.2  Northeast 	    55
                 4.5.2.3  Upper Midwest 	    55
                 4.5.2.4  Southeast 	    55
                 4.5.2.5  Estimates by State for pH	    55

     4.6  REGIONAL AND SUBREGIONAL POPULATION ESTIMATES FOR OTHER
          PRIMARY VARIABLES 	    56
          4.6.1  Sulfate	    56
          4.6.2  Calcium	    58
          4.6.3  Extractable Aluminum 	    60
          4.6.4  Dissolved Organic Carbon 	    60

     4.7  STATISTICS FOR POPULATION DESCRIPTIONS,
            PRIMARY VARIABLES 	    62

     4.8  STATISTICS FOR POPULATION DESCRIPTIONS,
            SECONDARY VARIABLES 	  	    62
          4.8.1  Nutrients	    62
          4.8.2  True Color, Turbidity and Secchi Disk
                 Transparency 	    63
          4.8.3  Sodium, Potassium and Magnesium  	    63
          4.8.4  Iron, Manganese and Total Aluminum  	    64
          4.8.5  Other Secondary Variables  	    65

     4.9  CHARACTERISTICS OF SPECIAL INTEREST LAKES  	 ...    65

5.   RESULTS AND DISCUSSION OF ASSOCIATIONS AMONG VARIABLES ....    67

     5.1  RELATIONSHIPS OF pH AND ANC	    67
          5.1.1  Comparison of pH Measurements  	    67
          5.1.2  Relationship between pH and ANC  	    68
          5.1.3  Comparison of Lake Sensitivity Indices 	    72

     5.2  SELECTED ASSOCIATIONS AMONG CHEMICAL VARIABLES  	    74
          5.2.1  Introduction	    74
          5.2.2  Sulfate	    75
          5.2.3  Extractable Aluminum 	    75
                 5.2.3.1  Background	    75
                 5.2.3.2  Associations between Extractable
                          Aluminum and Other Variables	    77
          5.2.4  ANC Versus Base Cations	    79
                                     vm

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                        VOLUME I CONTENTS (Continued)

Section

          5.2.5  Major Cations and Anions	    84
                 5.2.5.1  Individual Example Lakes  	    84
                 5.2.5.2  Order of Major Ions 	    86
                 5.2.5.3  Relationships among Major Ions  	    91
          5.2.6  Dissolved Organic Carbon (DOC) 	    94
                 5.2.6.1  Color and DOC	    94
                 5.2.6.2  Anion Deficit 	    97

     5.3  HYDROLOGY	   100
          5.3.1  Hydrologic Lake Type  	   100
          5.3.2  Hydraulic Residence Time 	   103

     5.4  CHARACTERISTICS OF ACIDIC LAKES 	   108

6.   REGIONAL AND SUBREGIONAL CHARACTERISTICS  	   110

     6.1  NORTHEAST	   HO
          6.1.1  Adirondacks  (1A)	   HI
          6.1.2  Catskills/Poconos  (IB)	   112
          6.1.3  Central New  England  (1C)	   112
          6.1.4  Southern New England  (ID)	   113
          6.1.5  Maine  (IE)	   113

     6.2  UPPER  MIDWEST	   114
          6.2.1  Northeastern Minnesota  (2A)   	   114
          6.2.2  Upper  Peninsula  of Michigan  (2B)  	   115
          6.2.3  Northcentral Wisconsin  (2C)   	   115
          6.2.4  Upper  Great  Lakes  Area  (2D)	   115

     6.3  SOUTHEAST	   116
          6.3.1  Southern Blue  Ridge  (3A)	   116
          6.3.2  Florida (3B)	   116

 7.   SUMMARY OBSERVATIONS  	   119

     7.1  OBJECTIVES	   119

     7.2  EXTENT AND  LOCATION OF  ACIDIC  AND LOW pH LAKES	   119
          7.2.1  Acidic Lakes	   119
          7.2.2  Low  pH Lakes	   119

     7.3  EXTENT AND  LOCATION OF  LOW  ANC LAKES	   120
                                     IX

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                        VOLUNE I CONTENTS (Continued)
Section                                                               Pace
     7.4  CHEMICAL CHARACTERIZATION 	    120
          7.4.1  Sulfate	    120
          7.4.2  Calcium	    120
          7.4.3  Extractable Aluminum 	    120
          7.4.4  Dissolved Organic Carbon 	    121
          7.4.5  Major Cations and AnIons 	    121
     7.5  FUTURE STUDIES	    121
8.   REFERENCES	    123
9.   GLOSSARY	    130

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                             VOLUME II CONTENTS
Section                                                                EiSfi
NOTICE	      ii
RELATED DOCUMENTS 	      iv
VOLUME I CONTENTS 	       v
VOLUME III CONTENTS	     xii
FIGURES	    xiii
TABLES	xxiii
1.   INTRODUCTION 	     1
2.   DESCRIPTIONS/DEFINITIONS OF PARAMETERS 	     4
3.   MAPS SHOWING LAKE LOCATIONS	    11
4.   REGULAR LAKES SORTED BY LAKE  ID	    34
5.   REGULAR LAKES SORTED BY STATE AND LAKE NAME	    89
6.   SPECIAL INTEREST LAKES SORTED BY  LAKE ID	144
7.   SPECIAL INTEREST LAKES SORTED BY  STATE AND LAKE NAME	152
8.   USGS TOPOGRAPHIC MAPS	160
     8.1  Small-scale Maps	160
     8.2  Large-Scale Maps	160
9.   POPULATION  ESTIMATES FOR SELECTED PHYSICAL AND CHEMICAL
     VARIABLES	187
     9.1  Applications of the Design	187
          9.1.1  Defining the Target  Population  	  187
          9.1.2  Estimating  the Target Population  Size  and
                 Associated  Variance  from  Sample Data  	  188
          9.1.3  Subpopulations	190
          9.1.4  Restrictions	192
     9.2  Descriptive Statistics  and  Cumulative Distributions  ....  192
          9.2.1  Population  Distributions  	  193
          9.2.2  Definitions of the Descriptive Statistics:
                 Interpretation of F(x)  and G(x) Data Output   ....  193
                 9.2.2.1  Distributions  	  194
                 9.2.2.2  Statistics   	  195

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                              VOLUME III  CONTENTS
 Stion                                                                Paqe
 NOTICE  	     ^
 RELATED DOCUMENTS   	     iv
 VOLUME  I  CONTENTS   	     v
 VOLUME  II CONTENTS	     xi
 1.   INTRODUCTION 	     l
 2.   DESCRIPTIONS/DEFINITIONS OF PARAMETERS 	     3
 3.   DATA  FOR INDIVIDUAL REGULAR LAKES SORTED BY LAKE ID	     13
 4.   DATA  FOR INDIVIDUAL SPECIAL INTEREST LAKES SORTED BY LAKE ID . .   337
                                 APPENDICES
APPENDIX A	         377
APPENDIX B	         432
                                    xn

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                                    FIGURES
Number
3-1    Regions sampled during the ELS-I  	   12
3-2    Region 1 of the ELS-I, with Subreglons 1A-1E shown	   13
3-3    Region 2 of the ELS-I, with Subreglons 2A-2D shown	   14
3-4    Region 3 of the ELS-I, with Subreglons 3A and 38 shown  ....   15
3-5    Sampled Lakes 1n Connecticut  	   16
3-6    Sampled Lakes in Florida	   17
3-7    Sampled Lakes in Georgia	   18
3-8    Sampled Lakes in Maine	   19
3-9    Sampled Lakes in Massachusetts  	   20
3-10   Sampled Lakes in Michigan 	   21
3-11   Sampled Lakes in Minnesota   	   22
3-12   Sampled Lakes 1n New Hampshire	   23
3-13   Sampled Lakes in New Jersey	   24
3-14   Sampled Lakes in New York	   25
3-15   Sampled Lakes in North Carolina 	   26
3-16   Sampled Lakes in Pennsylvania 	   27
3-17   Sampled Lakes in Rhode Island 	   28
3-18   Sampled Lakes in South Carolina 	   29
3-19   Sampled Lakes in Tennessee   	   30
3-20   Sampled Lakes in Vermont	   31
3-21   Sampled Lakes in Virginia 	   32
                                     XTM

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Number                                                                  Page

3-22   Sampled Lakes in Wisconsin  	   33

9-1    Population estimates, aluminum, extractable (ALEX11),
       Region 1  	195

9-2    Population estimates, aluminum, extractable (ALEX11),
       Subregion 1A	  197

9-3    Population estimates, aluminum, extractable (ALEX11),
       Subregion IB	  198

9-4    Population estimates, aluminum, extractable (AIEX11),
       Subregion 1C	  199

9-5    Population estimates, aluminum, extractable (ALEX11),
       Subregion ID	  200

9-6    Population estimates, aluminum, extractable (AIEX11),
       Subregion IE	  201

9-7    Population estimates, aluminum, extractable (ALEX11),
       Region 2	  202

9-8    Population estimates, aluminum, extractable (ALEX11),
       Subregion 2A	  203

9-9    Population estimates, aluminum, extractable (ALEX11),
       Subregion 2B	  204

9-10   Population estimates, aluminum, extractable (ALEX11),
       Subregion 2C	  205

9-11   Population estimates, aluminum, extractable (ALEX11),
       Subregion 2D	  206

9-12   Population estimates, aluminum, extractable (ALEX11),
       Subregion 3A	  207

9-13   Population estimates, aluminum, extractable (ALEX11),
       Subregion 3B	  208

9-14   Population estimates, aluminum, total  (ALTL11),
       Region 1   	  209

9-15   Population estimates, aluminum, total  (ALTL11),
       Region 2	  210

9-16   Population estimates, aluminum, total  (ALTL11),
       Subregion 3A	  211
                                     xiv

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Number

9-17   Population estimates,  aluminum,  total  (ALTL11),
       Subregion 3B  	
9-18   Population estimates,  acid  neutralizing  capacity
       (ALKA11),  Region 1   	213

9-19   Population estimates,  acid  neutralizing  capacity
       (ALKA11),  Subregion 1A  	  214

9-20   Population estimates,  acid  neutralizing  capacity
       (ALKA11),  Subregion IB  	  215

9-21   Population estimates,  acid  neutralizing  capacity
       (ALKA11),  Subregion 1C  	  216

9-22   Population estimates,  add  neutralizing  capacity
       (ALKA11),  Subregion ID  	  217

9-23   Population estimates,  add  neutralizing  capacity
       (ALKA11),  Subregion IE  	  218

9-24   Population estimates,  acid  neutralizing  capacity
       (ALKA11),  Region 2	219

9-25   Population estimates,  acid  neutralizing  capacity
       (ALKA11),  Subregion 2A  	  220

9-26   Population estimates,  add  neutralizing  capacity
       (ALKA11),  Subregion 2B  	  221

9-27   Population estimates,  acid  neutralizing  capacity
       (ALKA11),  Subregion 2C  	  222

9-28   Population estimates,  add  neutralizing  capacity
       (ALKA11),  Subregion 20  	  223

9-29   Population estimates,  acid  neutralizing  capacity
       (ALKA11),  Subregion 3A  	  224

9-30   Population estimates,  add  neutralizing  capacity
       (ALKA11),  Subregion 3B  	  225

9-31   Population estimates,  ammonium (NH416),  Region 1   	  226

9-32   Population estimates,  ammonium (NH416),  Region 2   	  227

9-33   Population estimates,  ammonium (NH416),  Subregion 3A  	  228

9-34   Population estimates,  ammonium (NH416),  Subregion 3B  	  229
                                      xv

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Number                                                                  Page
9-35   Population estimates, area, lake (LAKE_SIZ),  Region 1  ......   230
9-36   Population estimates, area, lake (LAKE_SIZ),  Region 2  	   231
9-37   Population estimates, area, lake (LAKE__SIZ),
       Subregion 3A	232
9-38   Population estimates, area, lake (LAKE_SIZ),
       Subregion 38	   233
9-39   Population estimates, calcium, (CA16), Region 1  	   234
9-40   Population estimates, calcium, (CA16), Subregion 1A 	   235
9-41   Population estimates, calcium, (CA16), Subregion IB 	   236
9-42   Population estimates, calcium, (CA16), Subregion 1C 	   237
9-43   Population estimates, calcium, (CA16), Subregion 10 	   238
9-44   Population estimates, calcium, (CA16), Subregion IE 	   239
9-45   Population estimates, calcium, (CA16), Region 2  	   240
9-46   Population estimates, calcium, (CA16), Subregion 2A 	   241
9-47   Population estimates, calcium, (CA16), Subregion 28 	   242
9-48   Population estimates, calcium, (CA16), Subregion 2C 	   243
         %
9-49   Population estimates, calcium, (CA16), Subregion 20 	   244
9-50   Population estimates, calcium, (CA16), Subregion 3A 	   245
9-51   Population estimates, calcium, (CA16), Subregion 38 	   246
9-52   Population estimates, chloride (CL16), Region 1  	   247
9-53   Population estimates, chloride (CL16), Region 2  	   248
9-54   Population estimates, chloride (CL16), Subregion 3A 	   249
9-55   Population estimates, chloride (CL16), Subregion 38 	   250
9-56   Population estimates, color,  true (COLVAL),  Region 1   	   251
9-57   Population estimates, color,  true (COLVAL),  Region 2   	   252
                                     xvi

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Number
                                                                        Page
9-58   Population estimates,  color,  true (COLVAL),
       Subreglon 3A  .........................   253

9-59   Population estimates,  color,  true (COLVAL),
       Subreglon 3B  .........................   254

9-60   Population estimates,  conductance (CONDII),  Region 1   .....   255

9-61   Population estimates,  conductance (CONDI! ),  Region 2   .....   256

9-62   Population estimates,  conductance (CONDI! ),
       Subreglon 3A  .........................   257

9-63   Population estimates,  conductance (CONDI!) ,
       Subreglon 3B  .........................   258

9-64   Population estimates,  depth,  site (SITDPM),  Region 1   .....   259

9-65   Population estimates,  depth,  site (SITDPM),  Region 2   .....   260

9-66   Population estimates,  depth,  site (SITDPM),
       Subreglon 3A  .........................   261

9-67   Population estimates,  depth,  site (SITDPM),
       Subreglon 3B  .........................   262

9-68   Population estimates,  dissolved Inorganic carbon (DICVAL),
       Region 1  ...........................   263

9-69   Population estimates,  dissolved inorganic carbon (DICVAL),
       Region 2  ...........................   264
                                                                         
9-70   Population estimates,  dissolved inorganic carbon (DICVAL),
       Subreglon 3A  .........................   265

9-71   Population estimates,  dissolved Inorganic carbon (DICVAL),
       Subreglon 3B  ......................   
9-72   Population estimates, dissolved organic carbon (DOC!!),
       Region 1  ...........................  267

9-73   Population estimates, dissolved organic carbon (DOC11),
       Subreglon 1A  .........................  268

9-74   Population estimates, dissolved organic carbon (DOC!!),
       Subreglon IB  .........................  269

9-75   Population estimates, dissolved organic carbon (DOC!!),
       Subregion 1C  .........................  270
                                       xvn

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Number                                                                  Page

9-76   Population estimates, dissolved organic carbon (DOC11),
       Subregion ID	271

9-77   Population estimates, dissolved organic carbon (DOC11),
       Subregion IE	272

9-78   Population estimates, dissolved organic carbon (DOC11),
       Region 2	273

9-79   Population estimates, dissolved organic carbon (OOC11),
       Subregion 2A	274

9-80   Population estimates, dissolved organic carbon (DOC11),
       Subregion 2B	275

9-81   Population estimates, dissolved organic carbon (DOC11),
       Subregion 2C	276

9-82   Population estimates, dissolved organic carbon (OOC11),
       Subregion 20	277

9-83   Population estimates, dissolved organic carbon (DOC11),
       Subregion 3A	278

9-84   Population estimates, dissolved organic carbon (DOC11),
       Subregion 38	279

9-85   Population estimates, dissolved organic carbon (DOC11),
       Region 1   	280

9-86   Population estimates, dissolved organic carbon (DOC11),
       Subregion 1A	281

9-87   Population estimates, dissolved organic carbon (DOC11),
       Subregion IB	282

9-88   Population estimates, dissolved organic carbon (DOC11),
       Subregion 1C	283

9-89   Population estimates, dissolved organic carbon (DOC11),
       Subregion ID	284

9-90   Population estimates, dissolved organic carbon (DOC11),
       Subregion IE	285

9-91   Population estimates, dissolved organic carbon (DOC11),
       Region 2	286
                                     xvm

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Number                                                                  Page
9-92   Population estimates,  dissolved organic carbon (DOC11),
       Subregion 2A	   287
9-93   Population estimates,  dissolved organic carbon (DOC11),
       Subregion 28	   288
9-94   Population estimates,  dissolved organic carbon (OOC11),
       Subregion 2C	   289
9-95   Population estimates,  dissolved organic carbon (DOC11),
       Subregion 20	   290
9-96   Population estimates,  dissolved organic carbon (DOC11),
       Subregion 3A	   291
9-97   Population estimates,  dissolved organic carbon (OOC11),
       Subregion 3B	   292
9-98   Population estimates,  elevation, lake (ELEV),  Region 1   ....   293
9-99   Population estimates,  elevation, lake (ELEV),  Region 2   ....   294
9-100  Population estimates,  elevation, lake (ELEV),
       Subregion 3A	   295
9-101  Population estimates,  elevation, lake (ELEV),
       Subregion 38	   296
9-102  Population estimates,  fluoride (FTL16), Region 1   	   297
9-103  Population estimates,  fluoride (FTL16), Region 2   	   298
9-104  Population estimates,  fluoride (FTL16), Subregion 3A  	   299
9-105  Population estimates,  fluoride (FTL16), Subregion 38  	   300
9-106  Population estimates,  iron (FEU),  Region 1	   301
9-107  Population estimates,  iron (FEU),  Region 2	   302
9-108  Population estimates,  Iron (FE11),  Subregion 3A 	   303
9-109  Population estimates,  Iron (FEU),  Subregion 38	   304
9-110  Population estimates,  magnesium (MG16), Region 1   	   305
9-111  Population estimates,  magnesium (MG16), Region 2   	   306
9-112  Population estimates,  magnesium (MG16), Subregion 3A  	   307
                                    xix

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Number                                                                  Page
9-113  Population estimates,  magnesium (MG16),  Subreglon 3B  	   308
9-114  Population estimates,  manganese (MN11),  Region 1   	   309
9-115  Population estimates,  manganese (MN11),  Region 2   	   310
9-116  Population estimates,  manganese (MN11),  Subreglon 3A  	   311
9-117  Population estimates,  manganese (MN11),  Subreglon 38  	   312
9-118  Population estimates,  nitrate (N0316),  Region 1  	   313
9-119  Population estimates,  nitrate (N0316),  Region 2  	   314
9-120  Population estimates,  nitrate (N0316),  Subreglon  3A 	   315
9-121  Population estimates,  nitrate (N0316),  Subreglon  38 	   315
9-122  Population estimates,  pH (PHSTVL),  Region 1  	   317
9-123  Population estimates,  pH (PHSTVL),  Subreglon 1A  	   318
9-124  Population estimates,  pH (PHSTVL),  Subregion IB  	   319
9-125  Population estimates,  pH (PHSTVL),  Subreglon 1C	   320
9-126  Population estimates,  pH (PHSTVL),  Subreglon ID  	   321
9-127  Population estimates,  pH (PHSTVL),  Subreglon IE  	   322
9-128  Population estimates,  pH (PHSTVL),  Region 2  	   323
9-129  Population estimates,  pH (PHSTVL),  Subreglon 2A  	   324
9-130  Population estimates,  pH (PHSTVL),  Subreglon 28  	   325
9-131  Population estimates,  pH (PHSTVL),  Subreglon 2C  	   326
9-132  Population estimates,  pH (PHSTVL),  Subreglon 20  	   327
9-133  Population estimates,  pH (PHSTVL),  Subreglon 3A  	  ...   328
9-134  Population estimates,  pH (PHSTVL),  Subreglon 38  	   329
9-135  Population estimates,  phosphorus (PTL11), Region  1   	   330
9-136  Population estimates,  phosphorus (PTL11), Region  2   	   331
                                      xx

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Number                                                                  Eifli
9-137  Population estimates,  phosphorus (PTL11),
       Subregion 3A	   332
9-138  Population estimates,  phosphorus (PTL11),
       Subregion 3B	   333
9-139  Population estimates,  potassium (K16), Region 1  	   334
9-140  Population estimates,  potassium (K16), Region 2  	   335
9-141  Population estimates,  potassium (K16), Subregion 3A 	   335
9-142  Population estimates,  potassium (K16), Subregion 3B 	   337
9-143  Population estimates,  Secchl disk transparency
       (SECMEAN), Region 1	   338
9-144  Population estimates,  Secchi disk transparency
       (SECMEAN), Region 2 	   339
9-145  Population estimates,  Secchi disk transparency
       (SECMEAN), Subregion 3A 	   340
9-146  Population estimates,  Secchi disk transparency
       (SECMEAN), Subregion 3B 	   341
9-147  Population estimates,  silica (SI0211), Region 1  	   342
9-148  Population estimates,  silica (SI0211), Region 2 	   343
9-149  Population estimates,  silica (SI0211), Subregion 3A 	   344
9-150  Population estimates,  silica (SI0211), Subregion 3B 	   345
9-151  Population estimates,  sodium (NA16), Region 1 	   346
9-152  Population estimates,  sodium (NA16), Region 2 	   347
9-153  Population estimates,  sodium (NA16), Subregion 3A  	   348
9-154  Population estimates, sodium (NA16), Subregion 3B  	   349
9-155  Population estimates, sulfate  (S0416), Region 1 	   350
9-156  Population estimates, sulfate  (S0416), Subregion 1A 	   351
9-157  Population estimates, sulfate  (S0416), Subregion IB 	   352
9-158  Population estimates, sulfate  (S0416), Subregion 1C 	   353
                                       xxi

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Number                                                                  Page
9-159  Population estimates,  sulfate (S0416),  Subreglon  ID 	   354
9-160  Population estimates,  sulfate (S0416),  Subreglon  IE 	   355
9-161  Population estimates,  sulfate (S0416),  Region 2 	   355
9-162  Population estimates,  sulfate (S0416),  Subreglon  2A 	   357
9-163  Population estimates,  sulfate (S0416),  Subreglon  28 .	   353
9-164  Population estimates,  sulfate (S0416),  Subreglon  2C 	   359
9-165  Population estimates,  sulfate (S0416),  Subregion  20 	   359
9-166  Population estimates,  sulfate (S0416),  Subregion  3A 	   351
9-167  Population estimates,  sulfate (S0416),  Subregion  3B 	   353
9-168  Population estimates,  turbidity (TURVAL),  Region  1   	   353
9-169  Population estimates,  turbidity (TURVAL),  Region  2   	   354
9-170  Population estimates,  turbidity (TURVAL),  Subregion 3A  ....   355
9-171  Population estimates,  turbidity (TURVAL),  Subreglon 38  ....   355
9-172  Population estimates,  watershed area (WSHEO)  Region 1  	   357
9-173  Population estimates,  watershed area (WSHED)  Region 2  	   353
9-174  Population estimates,  watershed area (WSHEO)
       Subregion 3A	    359
9-175  Population estimates,  watershed area (WSHED)
       Subregion 38	    370
9-176  Population estimates,  watershed area/lake  area (WALA)
       Region 1  	371
9-177  Population estimates,  watershed area/lake  area (WALA)
       Region 2	372
9-178  Population estimates,  watershed area/lake  area (WALA)
       Subregion 3A	373
9-179  Population estimates,  watr^hed area/lake  area (WALA)
       Subregion 38	374
                                     xxn

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                                    TABLES

Number                                                                   page

 2-1  Description/Definition of Parameters  	     5
 4-1  Regular Lakes Sorted by Lake ID	    35
 5-1  Regular Lakes Sorted by State and Lake Name	    90
 6-1  Special Interest Lakes Sorted by Lake ID	   145
 7-1  Special Interest Lakes Sorted by State and Lake Name   	   153
 8-1  Small Scale Maps	   161
 8-2  Large Scale Maps	   163
                                      xxi i 1

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                                  SECTION 1

                                INTRODUCTION
     As part of the National Acid Precipitation Assessment Program, the
U.S. Environmental Protection Agency initiated the National Surface Water
Survey (NSWS) in 1983.  The NSWS, which includes both lakes and streams, has
three primary goals and three distinct phases:  (1) quantify the present
chemical status of surface waters in the U.S. (Phase I), (2) assess the
temporal and spatial variability in aquatic chemistry and define the key
biological resources associated with surface waters (Phase II) and
(3) identify temporal trends in surface water chemistry and biology
(Phase III).
     The ELS-I was designed to provide the information needed to assess the
chemical status of lakes in areas of the eastern U.S. containing the
majority of low alkalinity systems.  Lakes were selected statistically from
the population of lakes within the northeastern, southeastern and upper
midwestern regions of the U.S.  Variables thought to Influence or be
influenced by surface water acidification were measured using standardized
methods.  The ELS-I data base may be used to Investigate correlative
relationships among chemical variables on a regional basis and to estimate
the chemical status of lakes within a specific region.
     The primary objectives of the ELS-I were to:

     (1)  determine the percentage (by number and area) and location of
          lakes that are acidic in potentially sensitive regions of the
          eastern U.S.;
     (2)  determine the percentage (by number and area) and location of
          lakes that have low acid neutralizing capacity in potentially
          sensitive regions of the eastern U.S.; and
     (3)  determine the chemical characteristics of lake populations in
          potentially sensitive regions of the eastern U.S. and provide the
          data base for selecting lakes for future studies.

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     Sampling for the ELS-I was completed in the fall of 1984.  The purpose
of this report, entitled Chemical Characteristics of Lakes in the Eastern
United States, is to present the results obtained during that survey.  The
report consists of three volumes, Volume I:  Population Descriptions and
Physico-chemical Relationships: Volume II:   Lakes Sampled and Descriptive
Statistics for Physical and Chemical Variables: and Volume III:  Data
Compendium of Site Characteristics and Chemical Variables.  This volume,
Volume II, provides supplemental information that was not presented in
detail in Volume I.  The additional information includes data for those
lakes that were part of the probability sample ("regular" lakes; Volume I,
Section 2.2.3) and those lakes that were not ("special interest" lakes;
Volume I, Section 2.2.5).
     This volume of the report is presented as nine sections including this
Introduction (Section 1).  Descriptions and definitions of parameters
presented here are given in Section 2.  Section 3 provides a map of the
eastern United States showing the three regions in which sampling was
conducted (Northeast, Upper Midwest and Southeast).  Three maps of these
regions, on which the eleven subregional boundaries are delineated, are
included.  Additionally, maps showing the locations of sampled lakes within
each state are presented.  Regular lakes, sorted by lake identification code
(Lake ID) and by lake names within states,  are listed in Sections 4 and 5,
respectively.  Similar lists for special interest lakes are given in
Sections 6 and 7.  Section 8 lists the U.S. Geological Survey maps used in
the selection of probability sample lakes (Volume I, Section 2.2).  The
final section (Section 9) includes estimates of selected physical and
chemical variables, based on the probability sample lakes, for the
subpopulation of lakes <2000 ha.  These estimates are presented as plots of
cumulative frequency [F(x)] and areal [G(x)] distributions (Volume I,
Section 4.3).  The distributions include those for physical variables
(Volume I, Section 4.4), primary variables  (Volume I, Section 4.7), and
secondary variables (Volume I, Section 4.8).  The reference values and
population estimates pertaining to these values are provided for the six

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primary variables, ANC, pH, sulfate, calcium, extractable aluminum, and
dissolved organic carbon (Volume I, Sections 4.5 and 4.6).  No reference
values for the physical variables or the secondary variables are given.
     The data presented here are a subset of the ELS-I data base.
Information concerning the distribution of the complete data set is
presented in the Notice (page ii).  The correct use and interpretation of
these data require an understanding the ELS-I design described in detail in
Volume I, Section 4.1.2.1.  Explanation of the cumulative distributions is
given in Volume I, Section 4.3 and in this volume, in Section 9.

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                                  SECTION 2

                    DESCRIPTION/DEFINITION OF PARAMETERS
     To satisfy the objectives of the ELS-I, a number of physical and
chemical parameters were measured using standardized protocols (Volume I,
Sections 2.4 through 2.7).  The physical parameters such as lake and
watershed areas (Volume I, Section 2.4) were measured because of their
importance in interpreting chemical data collected from lakes.  The chemical
parameters measured (Volume I, Section 2.5) included those that are
considered to be relevant to evaluating the potential response of lakes to
acidic deposition and those that are most useful  in characterizing the
chemical status of a population of lakes.  The ELS-I data base contains the
values of each of these parameters, as well as extensive information on the
location and identification of the lakes sampled.
     Table 2-1 lists, in alphabetical order, the  names and units of the
parameters presented in this volume.  Additionally, the name of each
parameter as it appears in the data base is given.  Brief definitions and/or
descriptions of the methods used in their determination are given for the
parameters.  More extensive descriptions are given in Volume I, Section 2
and in Hi 11 man et al. (1986).

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               TABLE 2-1.  DESCRIPTION/DEFINITION OF PARAMETERS
Parameter (unit)
Data Base Name
         Description/Definition
Acid Neutralizing ,
  Capacity (ueq L  )
   ALKA11
Aluminum, Extractable    ALEX11
  (ug L-i)
Aluminum, Total
  (ug L-i)
   ALTL11
Ammonium (ueq L" )
   NH416
Acid neutralizing capacity is a measure
of the amount of acid necessary to
neutralize the bicarbonate, carbonate,
hydroxyl, and other bases in a sample.
Acid neutralizing capacity was measured
in the analytical laboratory in an
unfiltered, unacidified aliquot, using
acidimetric titration and modified Gran
analysis (Hillman et al. 1986;
Kramer 1984).

Extractable aluminum is an estimate of
labile, monomeric aluminum.  Aluminum
in an unacidified, filtered sample was
complexed with 8-hydroxyquinoline and
extracted with methyl-isobutyl ketone
(MIBK) in the field laboratory.  The
aluminum was then measured in the
analytical laboratory, using the method
described in Hillman et al. (1986).
Values were converted from mg L'1 to
ug L'1 for data analysis.

Total aluminum was measured in the
analytical laboratory in an unfiltered,
acidified (HN03) aliquot (EPA 202.2,
AAS, atomic absorption spectroscopy,
graphite furnace).  Values were
converted from mg L'l to ug L'1 for
data analysis.

Ammonium ion was measured in the
analytical laboratory in a filtered,
acidified (H2S04) aliquot (EPA 350.1,
colorimetric, automated).  Values
were converted from mg L'1 to ueq  L-1
for data analysis.
 (continued)

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                            TABLE 2-1.   (Continued)
Parameter (unit)
Data Base Name
         Description/Definition
Calcium (ueq L" )
   CA16
Chloride (ueq L" )
   CL16
Color, True  (PCU)
   COLVAL
 Conductance  (uS  cm"1)     COND11
 Date  Sampled
 Depth,  Site  (m)
    DATSMP
    SITDPM
Calcium was measured in the analytical
laboratory in a filtered, acidified
(HN03) aliquot (EPA 215.1, AAS,
flame).  Values were converted from
mg L-1 to ueq L'1 for data analysis.

Chloride ion was measured in the
analytical laboratory in an aliquot
from a filtered, unacidified sample
(ASTM 1984; O'Dell et al. 1984, ion
chromatographic methods).  Values were
converted from mg L"1 to ueq L'1 for
data analysis.

True color is a measure  of the dissolved
and colloidal substances  in water that
reduce light transmission.  True color
was measured in the  field laboratory  in
a centrifuged aliquot  (to remove
particles), using a  Hach model CO-1
Comparator (EPA  110.2, modified).

Conductance is a measure  of the
resistance of a water  sample to an
electrical current.  Conductance was
measured  in the  analytical laboratory
using  a conductivity cell  (EPA 120.1).

Date  sampled is  the  date on which the
lake  sample was  collected.

Sampling-site depth  was  measured using
a weighted line,  and was not necessarily
the maximum lake  depth.
 (continued)

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                            TABLE 2-1.  (Continued)
Parameter (unit)
Data Base Name
         Description/Definition
Dissolved Inorganic
  Carbon (mg l_-l)
   DICVAL
Dissolved Organic
  Carbon (mg L'l)
Elevation, Lake (m)
Fluoride (ueq L  )
   DOC 11
   ELEV
   FTL16
Iron (ug L  )
   FEU
Lake Area (ha)
   LAKE SIZ
Dissolved inorganic carbon was measured
in the field laboratory.  The sample was
drawn directly into a syringe from the
Van Dorn water sampler at the lake site,
filtered, and analyzed, without exposure
to the atmosphere, using a Dohrmann
model DC-80 carbon analyzer with an
infrared spectrophotometric detector
(EPA 415.2, modified).

Dissolved organic carbon was measured in
the analytical laboratory in a filtered,
acidified (H2S04) aliquot (EPA 415.2,
infrared spectrophotometric detector).

Elevation of the lake surface was
determined from USGS topographic maps
or was estimated from topographic
contour lines.

Total dissolved fluoride was measured in
the analytical laboratory in a filtered,
unacidified aliquot, using an ion-
selective electrode (ISE, EPA 340.2,
modified).  Values were converted from
mg L-l to ueq L-l for data analysis.

Dissolved iron was measured in the
analytical laboratory,  in a filtered,
acidified (HN03) aliquot (EPA 236.1,
AAS, flame).  Values were converted
from mg L'* to ug L'J for data
analysis.

Lake surface area was measured on USGS
topographic maps using  an electronic
planimeter.
(continued)

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                            TABLE 2-1.   (Continued)
Parameter (unit)
Data Base Name
         Description/Definition
Lake ID
   LAKE ID
Lake Name
   LAKENAME
 Latitude
 Longitude


 Magnesium  (ueq  L"  )
    LAT



    LONG


    MG16
 Manganese  (ug  L"  )
    MN11
Lake ID is a seven-character, unique
identification code assigned to each
lake.  The first character is a digit
representing the Region (1, 2, or 3);
the second is a letter indicating the
subregion; the third is a digit, giving
the alkalinity map class; and the
fourth, a dash.  The last three digits
are the assigned lake number.

Lake name was taken from the USGS
topographic maps or, in some cases,
substituted with more recent information
from state sources.  When a number of
small water bodies were identified by
only one name on the map, a qualifier
was  added to the name, such as
"southern," to  identify the lake
sampled.  When  no name was listed,
"(NO NAME)" was entered into the data
base as the lake name.

Latitude was read from the USGS
topographic maps in DD-MM-SS  (degrees-
minutes-seconds) format.

Longitude was  read  from the  USGS
topographic maps in DDD-MM-SS  format.

Dissolved magnesium was measured in  the
analytical  laboratory  in  a filtered,
acidified  (HN03) aliquot  (EPA  242.1,
AAS, flame  or  furnace).   Values were
converted  from mg L'1  to  ueq  L"1 for
data analysis.

Dissolved manganese was measured in  the
analytical  laboratory  in  a filtered,
acidified  (HN03) aliquot  (EPA  243.1,
AAS, flame).   Values were converted
from mg  L"1  to ug L'1  for data
analysis.
 (continued)

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                            TABLE 2-1.   (Continued)
Parameter  (unit)
Data Base Name
         Description/Definition
Nitrate (ueq L  )
   N0316
pH
   PHSTVL
Phosphorus, total
  (ug L-i)
   PTL11
Potassium (ueq L  )
   K16
Secchi Disk
  Transparency (m)
   SECMEAN
Nitrate  ion was measured  in the
analytical laboratory  in  a filtered,
unacidified aliquot, using ion
chromatography (ASTM 1984; O'Dell et al.
1984).   Samples taken  before November 2,
1984, were analyzed in a  slightly
different manner  (see  Volume I,
Section  3.5.2).   Values were converted
from mg  !_1 to ueq L- 1 for data
analysis.

Closed system pH  was measured in the
field laboratory, using an Orion
model 611 meter and an Orion Ross
combination pH electrode  in a syringe
sample unexposed  to the atmosphere
(EPA 150.1).

Total phosphorous was measured in the
analytical laboratory  in  an unfiltered,
acidified (H2S04) aliquot, using either
of two automated, colorimetric,
phosphomolybdate  methods:  for normal
phosphorus levels, using  a 15-mm
absorption cell,  or for low levels, a
preliminary method using  a 50-mm
absorption cell (USGS  1-4600-78).
Values were converted  from mg L'1 to
ug I/1 for data analysis.

Dissolved potassium was measured in the
analytical laboratory  in  a filtered,
acidified (HN03)  aliquot  (EPA 258.1,
AAS, flame).  Values were converted
from mg  L- l to ueq !_l  for data
analysis.

Secchi disk transparency was determined
by averaging the depths of Secchi disk
disappearance and reappearance.  When
the Secchi disk was visible on the lake
bottom,  that value was  entered.
(continued)

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                            TABLE 2-1.   (Continued)
Parameter (unit)
Data Base Name
         Description/Definition
Silica (mg L"1)
Sodium (ueq L"1)
   S10211
   NA16
State
Sulfate (ueq L"1)
   ST
   S0416
Turbidity  (NTU)




WA/LA


Watershed  Area  (ha)
   TURVAL




   MALA


   WSHED
Silica was measured in the analytical
laboratory 1n an unfiltered aliquot
(USGS 1-2700-78, colorlmetrlc, molybdate
blue, automated method).

Dissolved sodium was measured in the
analytical laboratory In a filtered,
acidified (HN03) aliquot (EPA 273.1,
AAS, flame).  Values were converted
from mg L-l to ueq L-l for data
analysis.

State 1s the state in which the lake is
located, Indicated as the standard
two-character postal state abbreviation.

Sulfate 1on was measured in the
analytical laboratory 1n the filtered
aliquot, using Ion chromatography
(ASTM 1984; O'Dell et al. 1984).  Values
were converted from mg L-l to ueq L- 1
for data analysis.

Turbidity was measured in the field
laboratory, using a Monitek model 21
nephelometer, reported in nephelometric
turbidity units  (EPA  180.1).

WA/LA 1s the ratio of watershed area to
lake area.

Watershed area,  which Includes lake
area, was measured on large  scale USGS
topographic maps using  an electronic
pi an1meter.
                                        10

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                                  SECTION 3

                         NAPS SHOWING LAKE LOCATIONS
     This section provides maps showing the study area and location of all
lakes (both probability sample or regular lakes, and special Interest lakes)
sampled during the ELS-I.  Figure 3-1 shows the regions and subregions that
defined the areas of interest for the ELS-I.  Figures 3-2 to 3-4 show these
three regions of interest, their subregions (as indicated by letter
designation), and the three alkalinity map classes.  These three factors
(region, subregion, and alkalinity map class) served as the stratification
factors for the statistical design of the Survey (Volume I, Section 2.2.1).
     The alkalinity map classes shown in Figures 3-2 to 3-4 are based on
maps by Omernik and Kinney (1985), Omernik and Griffith (1985) and
Omernik  (1985).  These areas represent map units that contain lakes, the
majority of which were anticipated to exhibit alkalinity values within
expected ranges.  These map classes are not based on ELS-I measured lake
ANC values.
     Figures 3-5 to 3-22 show maps of each state with subregion boundaries,
as appropriate, and locations of the sampled lakes.  The subregion
boundaries shown here may differ slightly from the original base maps used
to delineate subregions.  Lakes selected as part of the probability sample
(regular lakes) are distinguished from special interest lakes by open
squares and "+" symbols, respectively.  Maritime states such as Maine and
Massachusetts show offshore lakes that were located on islands not
represented on these maps.  The map of Michigan (Figure 3-10) does not show
two lakes that were sampled on Isle Royale located in Lake Superior.
                                      11

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  Upper Mid west
               Subregion Boundary
Figure 3-1.  Regions sampled during the ELS-I
                     12

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    ALKALINITY MAP CLASS!*
Figure 3-2.   Region 1 of the  ELS-I, with  Subregions 1A-1E  shown
                                   13

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                                              ALKALINITY MAP CLASSES
Figure 3-4.  Region 3 of the  ELS-I,  with Subregions 3A and 3B shown
                                    15

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Figure 3-8.  Sampled lakes in Maine.
               19

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Figure 3-10.  Sampled lakes  1n Michigan
                21

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Figure 3-11. Sampled lakes in Minnesota
               22

-------
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Figure 3-12.  Sampled lakes  1n New Hampshire.
                  23

-------
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Figure 3-13.  Sampled lakes 1n New Jersey.
                24

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Figure 3-22.  Sampled lakes in Wisconsin
                 33

-------
                                  SECTION 4

                       REGULAR LAKES SORTED BY LAKE ID
     This section (Table 4-1) lists all regular lakes (those that were part
of the probability sample), sorted by Lake ID.  Each Lake ID,is a unique
seven-character code.  The first character Identifies the region In which
the lake is located (1, 2, or 3); the second character,  the subregion (A
through E); the third character, the alkalinity map class (1, 2, or 3);  the
fourth character, a dash; and the last three, the assigned lake number.   A
lake with the ID of 1A1-010 1s located 1n region 1 (the  Northeast),
subregion A (the Adlrondacks), was selected from alkalinity map class 1
(<100 ueq L" ), and is the tenth lake numbered 1n this group.  Some lakes
were dropped 1n the selection process or were not sampled (Volume I,
Section 2.2.4); therefore, the assigned lake numbers are not consecutive.
For a description of the lake selection process, see Volume I,  Section 2.2.
     The additional Information provided in Table 4-1 includes  lake name as
it appears on the USGS map; the name of the state in which the  lake is
located (given as the two-character postal code); latitude and  longitude (in
degrees-minutes-seconds); and the large scale USGS topographic  map, the  size
of the map (referred to in the tables as scale) and map  name.  The scale and
map name refer to those maps actually used to locate and characterize the
selected lakes.
                                     34

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                                              38

-------
                                  SECTION 5

                 REGULAR LAKES SORTED BY STATE AND LAKE NAME
     This section (Table 5-1) lists all  regular lakes (those that were part
of the probability sample), sorted by state and lake name.
     The table includes:  the name of the state in which the lake is
located, the lake name.as it appears on  the appropriate USGS map, the lake
ID as described in Section 4, the latitude and longitude (in
degrees-minutes-seconds) and the date the lake was sampled.
                                      89

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                                  SECTION 6

                  SPECIAL INTEREST LAKES SORTED BY LAKE ID
     This section (Table 6-1) lists all  special  Interest lakes (those not
part of the probability sample) sorted by Lake ID.   Each Lake ID is a unique
seven-character code.  The first character Identifies the region in which
the lake is located (1, 2, or 3); the second character,  the subregion (A
through E); the third character, the alkalinity map class (1, 2, or 3);  the
fourth character, a dash; and the last three; the assigned lake number.   A
lake with the ID of 1A1-010 is located 1n region 1  (the Northeast),
subregion A (the Adirondacks), was selected from alkalinity map class 1
(<100 ueq L"1), and is the tenth lake numbered 1n this group.  Some lakes
were not sampled; therefore, the assigned lake numbers are not consecutive.
For a description of how the special Interest lakes were chosen, see
Volume I, Section 2.2.5.
     The additional information provided 1n Table 6-1 Includes lake name as
it appears on the USGS map; the name of the state in which the lake is
located  (given as the two-character postal code); latitude and longitude (in
degrees-minutes-seconds); and the large scale USGS topographic map, the size
of the .map (referred to on the table as scale) and the map name.  The scale
and map  name refer to those maps actually used to locate and characterize
the selected lakes.
                                       144

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                                  SECTION 7

            SPECIAL INTEREST LAKES SORTED BY STATE AND LAKE NAME
     This section (Table 7-1) lists all  special  interest lakes  (those  not
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                                      152

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                                    159

-------
                                  SECTION 8

                            US6S TOPOGRAPHIC NAPS
     Two types of USGS maps were used In the Survey, small-scale and
large-scale.  The small-scale .maps (1:250,000) were used 1n the initial lake
selection process and the large-scale maps (1:24,000, 1:25,000, and
1:62,500) were used for characterization of lakes and watersheds, refinement
of the lake selection process (Volume I, Section 2.2), and location of lakes
for sampling.

8.1  SMALL-SCALE NAPS

     Table 8-1 1s a 11st of all small-scale (1:250,000) USGS topographic
maps used In the ELS-I for Initial lake selection sorted by map name.  Parts
of states covered by the maps are Indicated In the middle column.
Publication dates provide unique map Identification; multiple publication
dates Include dates of map revisions.

8.2  LARGE-SCALE NAPS

     Table 8-2 1s a list of all large-scale (1:24,000, 1:25,000 and
1:62,500) USGS topographic maps used In the ELS-I for lake selection, sorted
by map name.  Publication dates provide unique map Identification;  multiple
publication dates Indicate dates of map revisions.
                                      160

-------
TABLE 8-1.  SHALL SCALE NAPS
Map name
ALBANY
ALPENA
ASHLAND
ATHENS
ATLANTA
BANGOR
BATH
BINGHAMTON
BLIND RIVER
BLUEFIELD
BOSTON
BRAINERD
CANBELLTON
CHARLOTTE
CHATTANOOGA
CHEYBOYGAN
OAYTONA BEACH
OULUTH
EASTPORT
EDMUNDSTON
ELMIRA
ESCANABA
FORT PIERCE
FREDRICTON
GAINESVILLE
GLENS FALLS
GREENSBORO
GREENVILLE
HANCOCK
HARTFORD
HIBBING
INTERNATIONAL FALLS
IRON MOUNTAIN
IRON RIVER
JACKSONVILLE
JOHNSON CITY
KNOXVILLE
LAKE CHAMPLAIN
LEWISTON
MARQUETTE
MILLINOCKET
NEW YORK
NEWARK
States covered
NY.NH.YT.MA.CT
MI
WI.MI.MN
GA.SC
GA.AL
ME
ME
NY
MI
WV.VA.KY
MAvNHvCTfRI.ME
MN
ME
NC,SC
TNtNC
MI
FL
MN.WI
ME
ME
NY
MI.WI
FL
ME
FL
NY.VT.NH
NC.VA
SC.GA.NC
MI.MN.WI
CT,NY,NJ,MA
MN
MN
MI,WI
MI.WI
FL.GA
TN.NC.VA.KY
TN.NC.SC
NY.NH.VT
ME.NH.VT
MI
ME
NY.NJ.CT
NJ.NY.PA
Publication dates
1956/1974
1954/1980
1953/1963
1953/1965
1953/1970
1956/1965
1956/1972
1948
1961/1980
1957/1966
1956/1970
1953/1975
1960
1953/1974
1957/1972
1955/1981
1954/1972
1953/1963
1956
1962
1962/1978
1954/1966
1956/1972
1957
1954/1975/1978
1956/1972
1953/1980
1954/1964
1958/1966
1962/1975
1954/1979
1954/1980
1954/1980
1958/1967
1957/1966
1957/1966
1957/1972
1962/1972
1956/1972
1958/1968
1954/1967
1960/1979
1944/1969
                                 (continued)
           161

-------
                     TABLE 8-1 (continued)
 Hap name
States covered     Publication dates
06DENSBUR6
ORLANDO
PORTLAND
PRESQUE ISLE
PROVIDENCE
QUEBEC
QUETICO
RICE LAKE
ROANOKE
ROCHESTER
ROME
SAULT SAINTE MARIE
SCRANTON
SHERBROOKE
STILLWATER
TALLAHASSEE
TAMPA
TARPON SPRINGS
TAWAS CITY
THUNDER BAY
TRAVERSE CITY
TWO HARBORS
UTICA
VALDOSTA
WAYCROSS
WEST PALM BEACH
WILLIAMSPORT
WINSTON-SALEM
NY
FL
ME.NH
ME
RI,CT,MA,NY
ME
MN
WI
VA
NY
GA,AL,TN,NC
MI
PA.NJ.NY
ME,NH
MN.WI
FL.GA.AL
FL
FL
MI
MN.MI
MI
MN,MIrWI
NY
GA,FL
GA
FL
PA, NY
NC.VA.TN
1948
1955/1972
1956/1972
1954/1967
1947/1969
1962
1957/1981
1953/1980
1971
1961/1976
1958/1966/1972
1954/1982
1962/1976
1961
1953/1980
1954/1966
1956/1972
1955/1977
1954/1967
1959/1966
1954/1964
1954/1964
1962
1954/1965
1953/1966
1956/1972
1962/1974
1953/1962
                              162

-------
                   TABLE 8-2.  LARGE SCALE HAPS
USGS map name
Scale
State   Published date
AFTON
ALBA
ALBANY ISLAND
ALOENVILLE
ALDER BROOK
ALICE LAKE
ALLAGASH
ALLAGASH LAKE
ALMENA
ALTON
ALVIN
ALVIN NW
ALVIN SW
AMASA
AMBERG
AMITY
AMPERSAND LAKE
ANGLEWORM LAKE
ANSON
ANSONIA
ANVIL LAKE
ASH RIVER NE
ASH RIVER SE
ASHAWAY
ASHBURNHAM
ASHBURNHAM
ASSAWOMPSET POND
ASTRID LAKE
ATLANTA
ATTEAN
AU SABLE FORKS
AU SABLE POINT SE
AU SABLE POINT SW
AUGER LAKE
AUGERHOLE FALLS
AUGUSTA
AURORA
AVERILL
AVOCA
AYER
BALSAM LAKE
BARRE WEST
BARRINGTON
BASHBISH FALLS
7.5'
15'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'xl5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'xl5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
NY
MI
MI
PA
NY
MN
ME
ME
WI
NH
WI
WI
WI
MI
WI
ME
NY
MN
ME
CT
WI
MN
MN
CT
MA
NH
MA
MN
MI
ME
NY
MI
MI
MI
NY
ME
MN
VT
PA
MA
MN
VT
NH
CT
1957
1956
1964
1946/1969
1968
1960
1930
1961
1978
1957
1970
1970
1970
1945/1975
1982
1958
1978
1963
1955
1964/1972
1970
1968/1983
1968
1953/1970/1975
1965/1979
1965/1979
1978
1963
1955
1923
1978
1966
1966
1973
1970
1980
1962/1983
1953
1946/1969/1976
1966/1979
1971
1978
1981
1958/1969
                                                      (continued)
                               163

-------
TABLE 8-2 (continued)
USGS map name
BASSWOOD LAKE
BASSWOOO LAKE NW (OP)
BASSWOOD LAKE SE (OP)
BATH
BAVARIA
BEAN LAKE
BEAR ISLAND
BEATON
BEAVER POND
BELFORT
BELGRADE
BELGRADE LAKES
BELLOWS FALLS
BENNINGTON
BENSON
BERGLAND
BERGLAND
BETH LAKE
BETHEL
BETSY LAKE NORTH
BETSY LAKE NW
BETSY LAKE SW
BIG LAKE
BIG MOOSE
BIG ROUND LAKE
BIGELOW
BINGHAM
BIRCH ISLAND LAKE
BIRCHWOOD
BLACK OAK LAKE
BLACKSTONE
BLAKESLEE
BLANDFORD
BLANEY PARK
BLOOMINGDALE
BLUE HILL
BLUE MOUNTAIN
BOB LAKE
BOLTON LANDING
BOMOSEEN
BOONTON
BOONVILLE
BOOTLEG LAKE
BOULDER JUNCTION
Scale
15'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'xl5'
15'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
State
MN
MN
MN
ME
WI
WI
MN
MI
ME
NY
ME
ME
NH
VT
VT
MI
MI
MN
CT
MI
MI
MI
ME
NY
WI
NY
ME
WI
WI
WI
MA
PA
MA
MI
NY
ME
NY
WI
NY
VT
NJ
NY
MN
WI
Published date
1957
1976
1976
1957
1973
1971
1965
1982
1955
1966
1980
1982
1957
1954
1946
1956
1982
1960
1970
1968
1968
1968
1963
1954
1983
1956
1956
1982
1982
1981
1969/1979
1965/1973
1972
1972
1978
1957
1954
1975
1966
1944
1954/1981
1955
1963
1955
                               (continued)
        164

-------
TABLE 8-2 (continued)
USGS map name
BOULDER JUNCTION
BOULTON MOUNTAIN
BOUNDARY POND
BRADLEY
BRANCHVILLE
BRANDON
BRANFORD
BRANT LAKE
BRANTINGHAM
BRASSUA LAKE
BRATTLEBORO
BREWER LAKE
BRIDGEWATER
BRISTOL
BRITT
BROTHER PONDS
BRULE LAKE
BRYANT POND
BUCK HILL FALLS
BUCKEYE LAKE
BUCKFIELD
BUCKSPORT
BURNT HILLS
BUSHKILL
BUTTERNUT
BUXTON
CABIN LAKE
CALAIS
CANADA LAKE
CANDIA
CANTON
CANTON
CARBONDALE
CARDIGAN
CAROGA LAKE
CAROLINA
CARRY FALLS RESERVOIR
CAUCOMGOMOC LAKE
CENTER MORELAND
CENTRAL LAKE
CENTRAL LAKES
CHAD LAKE
CHAIN LAKE
CHAMPION
Scale
7.51
7.5'
7.5'
7.5'
7.5'
7.5'
7.51
7.5'
7.51
15'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
15'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
15'
State
MI
VT
ME
MI
NJ
VT
CT
NY
NY
ME
VT
ME
MA
CT
MN
NY
MN
ME
PA
MI
ME
ME
NY
PA
MI
ME
MN
ME
NY
NH
ME
PA
PA
NH
NY
RI
NY
ME
PA
MI
MN
MN
WI
MI
Published date
1981
1948
1970
1971
1954/1971
1946
1967/1972
1966
1966
1957
1954
1982
1977
1966/1972
1951/1969
1970
1960
1967
1966/1973
1973
1967
1955
1954/1980
1944/1983
1968
1942
1982
1929
1945
1969
1967
1970
1946/1969
1956
1970
1953/1970
1970
1958
1946/1969/1977
1954
1951/1969
1956
1972
1955
                               (continued)
         165

-------
TABLE 8-2 (continued)
USGS map name
CHAMPION
CHANEY LAKE
CHANNING
CHEPACHET
CHEROKEE LAKE
CHERRYFIELD
CHESHIRE
CHESTER
CHESTERTOWN
CHESUNCOOK
CHILDWOLD
CHITTAMO
CHITTAMO NE
CHURCHILL LAKE
CINCINNATI^
CLAREMONT
CLARKSVILLE
CLARYVILLE
CLAYVILLE
CLINTON
COHASSET WEST
COLCHESTER
COLUMBIA
COMINS
COMSTOCK LAKE
CONCORD
CONCORD
CONKLINGVILLE
CONNERS ISLAND
COOKS
COON LAKE
CORNER LAKE
CORNISH
CORNUCOPIA
CORRINA
COSSAYUNA
COTUIT
COVENTRY CENTER
CRAB LAKE
CRAMER
CRAMER
CRANBERRY BAY
CRANBERRY LAKE
CRANDON
Scale
7.5'
7.5'
7.51
7.5'
7.51
15'
7.5'
7.5'
7.5'
151
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
State
MI
MI
MI
RI
MN
ME
MA
NJ
NY
ME
NY
WI
MI
ME
NY
NH
NY
NY
RI
CT
MN
CT
CT
MI
MN
MA
NH
NY
MN
MI
MN
MI
ME
WI
ME
NY
MA
RI
MN
MN
MN
MN
NY
WI
Published date
1955
1982
1955/1975
1955/1970/1975
1960
1902
1973
1954/1981
1968
1958
1968
1971
1971
1962
1943
1957
1953/1980
1966
1955/1970
1961/1970
1953/1969
1953/1970
1953/1970
1955
1957/1976
1970/1979
1967
1966
1959
1958
1970
1958
1964
1964
1982
1944
1974
1955/1970
1956
1955
1981
1969/1983
1968
1965/1982
                               (continued)
        166

-------
TABLE 8-2 (continued)
USGS map name
CROCODILE LAKE
CROMPTON
CROSBY
CROSS LAKE
CROTON FALLS
CRYSTAL DALE
CULVERS GAP
CUMBERLAND
CUPSUPTIC
CURTIS WEST
CUYLER
DAFTER
DALEY BAY
DALTON
DAM LAKE
DANIELSON
DANNEMORA
DE TOUR VILLAGE
DEBAR MOUNTAIN
DEER ISLE
DEER LAKE
DEER LAKE EAST (OM)
DEER RIVER
DELAWARE
DELTA
DENHAM
DENNIS
DEPOSIT
DEPOT LAKE
DEWEY LAKE
DEWEY LAKE NW
DEWEY LAKE SE
DIAMOND LAKE
DIXMONT
DIXVILLE
DOLLAR SETTLEMENT
DONKEN
DOVER
DOVER PLAINS
DOVER WEST
DOVER-FOXCROFT
DRIGGS LAKE
DRUMMOND NW
DRUMMOND SE
Scale
7.5'
7.51
7.5'
7.51
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.51
7.5'
7.5'
7.5'
7.51
7.5'
7.5'
7.51
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.51
15'
7.51
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.51
7.5'
7.5'
State
MN
RI
MN
MN
NY
NY
NJ
WI
ME
MI
NY
MI
MN
PA
WI
CT
NY
MI
NY
ME
MI
MN
MN
MI
WI
MN
MA
NY
ME
MN
MN
MN
WI
ME
NH
MI
MI
NJ
NY
NH
ME
MI
WI
MI
Published date
1959
1955/1970
1973
1960
1960/1981
1966
1954/1971
1982
1931
1972
1943
1951/1975
1968/1983
1946/1969
1970
1955/1970
1966
1964
1968
1942
1948/1975
1970
1970
1948/1975
1971
1982
.1974
1965
1955
1955/1969/1976
1955
1955/1969/1976
1971
1982
1930
1951/1976
1982
1954/1981
1958/1971
1956/1973
1932
1972
1971
1964/1976
                             (continued)
       167

-------
                        TABLE  8-2  (continued)
USGS map name
Scale
State   Published date
DURHAM
DUTCH MTN
DUXBURY
EAGLE LAKE
EAGLE LAKE
EAGLE MTN
EAGLE RIVER EAST
EAGLE RIVER WEST
EAGLES NEST
EAST ANDOVER
EAST BARRE
EAST BROOKFIELD
EAST HAMPTON
EAST HAVERHILL
EAST KILLINGLY
EAST LEE
EAST PITTSTON
EAST STROUDSBURG
EASTFORD
ECHO LAKE
ECHO LAKE
EDGEMERE
EDGEWATER
EDINBURG
EDNA LAKE
EDWARDS
ELCHO
ELDRED
ELIZABETHTOWN
ELLISBURG
ELLISON LAKE
ELLSWORTH
ELY
EMBARRASS
EMERSON
ENGADINE
ENSIGN LAKE
ENSIGN LAKE SE (OP)
ENSIGN LAKE SW (OP)
ENTERPRISE
EPPING
ERROL
ESSEX CENTER
EVELETH
7.5'
7.5'
7.51
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'x15
7.5'
15'
15'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
CT
PA
MN
ME
NY
MN
WI
WI
MN
ME
VT
MA
NY
NH
CT
MA
ME
PA
CT
MI
MN
PA
WI
NY
MN
NY
WI
NY
NY
NY
WI
ME
MN
MN
MI
MI
MN
MN
MN
WI
NH
NH
VT
MN
1964/1972
1946/1969
1981
1928
1973
1960
1970
1970/1982
1956/1969
1968
1957
1969/1979
1956
1967
1955/1970/1974
1973
1970
1944/1983
1983
1982
1963
1965/1973
1972
1970
1970
1956/1982
1973
1967
1978
1958
1961
1957
1965
1949/1969
1951/1975
1973
1957
1976
1976
1973
1981
1930
1948/1972
1951/1983
                                                      (continued)
                                 168

-------
TABLE 8-2 (continued)
USGS map name
FACTORYVILLE
FALMOUTH
FARM LAKE
FARMINGTON
FARMINGTON FALLS
FARQUHAR PEAK
FAYETTE
FENCE LAKE
FINE
FINLAYSON
FIRESIDE LAKES
FIRST ROACH POND
FISH RIVER LAKE
FITCHBURG
FIVE PONDS
FLATBROOKVILLE
FLORENCE SE
FOREST
FOREST CENTER
FOREST CITY
FOURTOWN LAKE
FRANKLIN
FREDERIC
FREELAND
FRIDAY BAY
FRIENDSHIP
FRYEBURG
FULLER
GABBRO LAKE
GALWAY
GANSEVOORT
GARDNER
GARDNER LAKE
GARNET
GAYLORD
GEORGETOWN
GERMFASK
GILCHRIST
GILLIS LAKE
GILMANTON
GLASTONBURY
GLENS FALLS
GLOUCESTER
GLOVERSVILLE
Scale
7.5'
7.51
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.51
7.51
7.5'
15'
15'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
7.5'
7.51
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.51
15'
7.5'
7.5'
7.5'
7.5'
State
PA
MA
MN
ME
ME
MN
ME
MI
NY
MN
MI
ME
ME
MA
NY
NJ
MI
ME
MN
PA
MN
NJ
MI
PA
MN
ME
ME
MI
MN
NY
NY
MA
ME
MI
MI
MA
MI
MI
MN
NH
CT
NY
MA
NY
Published date
1946/1969
1972/1979
1981
1968
1968
1960/1976
1966
1971
1966
1981
1972
1952
1931
1969/1979
1969
1954/1971
1962
1940
1957
1946/1969
1963
1954/1971
1983
1948/1969/1976
1963
1955/1973
1963
1982
1981
1970
1968
1970/1979
1941
1973
1954
1966/1979
1972
1973
1959
1957
1964/1972
1966
1973
1970
                             (continued)
     169

-------
TABLE 8-2 (continued)
USGS map name
60GEBIC
GOLDEN LAKE
GORDON
60SHEN
GOSSVILLE
GOULD CITY
GOUVERNEUR
GRAFTON
GRAND LAKE SEBOEIS
GRAND NARAIS SE
GRAND SABLE LAKE
GRAND VIEW NW
GRANTSBURG
GRAPHITE
GRAVE LAKE
GRAVERAET RIVER
GRAY
GREAT BARRINGTON
GREAT POND
GREEN LAKE
GREENLAW
GREENVILLE
GREENWOOD
GREENWOOD LAKE EAST
GREENWOOD LAKE WEST
GROVER
GUILDHALL
GUILFORD
GUILFORD
GULLIVER
GUNFLINT LAKE
GWINN
GWINN
HADDAM
HAGERNAN LAKE
HAMBURG
HAMBURG
HAMILTON
HAMPDEN
HANCOCK
HANCOCK
HANOVER
HARDWICK
HARFORD
Scale
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
15'
15'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
State
MI
MI
WI
MA
NH
MI
NY
MA
ME
MI
MI
WI
WI
NY
MN
MI
ME
MA
ME
ME
ME
ME
ME
MN
MN
PA
VT
ME
NY
MI
MN
MI
MI
CT
MI
CT
NJ
NY
ME
MA
MI
MA
VT
PA
Published date
1982
1981
1982
1972
1967
1973
1956/1982
1969/1979
1954
1968
1966
1971
1982
1973
1973
1954/1975
1980
1973
1957
1982
1930
1951
1967
1982
1982
1969
1956
1933
1943
1972
1960
1952
1952/1975
1961/1971
1981
1961/1971
1954/1971
1943
1982
1973
1946/1975
1978
1951
1968/1978
                             (continued)
      170

-------
                         TABLE  8-2  (continued)
USGS map name
Scale
State   Published date
HARRINGTON LAKE
HARRIS LAKE
HARRISBURG
HARRISON
HARRISVILLE
HARSHAW
HARTWOOD
HARVEYS LAKE
HARWICH
HAUER
HAUGEN
HAVERHILL
HAWLEY
HAZELHURST
HEAFFORD JUNCTION
HEATH
HENSONVILLE
HERMAN
HERTEL
HICKORY RUN
HIGHLAND LAKE
HILLSBORO
HIRAM
HOLDERNESS
HOLLISTON
HONESOALE
HOP BOTTOM
HOPKINTON
HORSESHOE LAKE
HORTON
HOWE BROOK
HUDSON
HUNGRY JACK LAKE
HUNTINGTON
HUNTINGTON
HURON MTN
HYANNIS
HYDE PARK
IDINGTON
IMP LAKE
INDIAN LAKE
I NO
IRMA
IRON LAKE
15'
7.5'
15'
7.51
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
15'
7.5'
7.5'
15'
ME
MI
NY
WI
MI
WI
NY
PA
MA
WI
WI
MA
PA
WI
WI
MA
NY
MI
WI
PA
NY
NH
ME
NH
MA
PA
PA
NH
WI
NY
ME
MA
MN
NY
VT
MI
MA
VT
MN
MI
NY
WI
WI
WI
1954
1982
1954
1982
1959
1982
1966
1946/1969
1974
1971
1982
1972
1966/1983
1982
1982
1942/1974
1945/1980
1955
1982
1966/1973
1967
1957
1964
1956
1969/1979
1946/1969
1946/1969 .
1967
1982
1965/1982
1965
1966/1979
1959/1976
1967/1979
1948/1980
1954
1974/1979
1953
1952/1969
1982
1954
1964/1975
1982
1961
                                                     (continued)
                               171

-------
TABLE 8-2 (continued)
USGS map name
IRON LAKE
IRON RIVER
IRONWOOD
ISAAC LAKE
ISHPEMING
ISLAND FALLS
ISLAND POND
ISLESBORO
ISPWICH
JACKSON SUMMIT
J AMES V RLE
JAY PEAK
JEFFERSONVILLE
JO-MARY MTN
JOHANNESBURG
JOHNSON LAKE
JULIA LAKE
KABUSTASA LAKE
KADUNCE RIVER
KALKASKA
KATAHDIN
KAWISHIWI LAKE
KEENE
KEENE VALLEY
KEKEKABIC LAKE
KELSO MTN
KEMPSHALL MTN
KEMPSTER
KEMPTON BAY
KENNEBUNK
KENTON
KETTLE FALLS
KEWEENAW BAY
KEZAR FALLS
KINGFIELD
KINGSBURY
KINGSTON
KINGSTON
KINNEY
KINROSS
KIRK
KROSCHEL NW
LAC DU FLAMBEAU
LAC DU FLAMBEAU SW
Scale
7.5'
7.5'
15'
7.5'
15'
15'
15'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
15'
7.5'xl5 '
7.5'
7.5'
7.5'xl5 '
7.5'
7.5'
15'
7.5'
7.5'
15'
7.5'
15'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
State
MN
MI
WI
MN
MI
ME
VT
ME
MA
NY
NY
VT
NY
ME
MI
MN
WI
MN
MN
MI
ME
MN
NH
NY
MN
MN
NY
WI
MN
ME
MI
MN
MI
ME
ME
ME
PA
RI
MN
MI
MN
MN
WI
WI
Published date
1963
1944
1955
1949/1983
1952
1940
1953
1973
1966
1970
1973/1978
1953
1965
1952
1950
1967/1983
1970
1967
1960/1976
1956
1949
1960
1958
1979
1959
1960
1979
1973
1967/1983
1956
1982
1967/1983
1954
1964
1930
1948
1946/1969/1976
1957/1970/1975
1951/1983
1951/1975
1951/1983
1968
1971
1971
                             (continued)
      172

-------
TABLE 8-2 (continued)
USGS map name
LAKE AGNES
LAKE ARIEL
LAKE BONAPARTE
LAKE CARMEL
LAKE CLAYTON
LAKE COMO
LAKE EVELYN
LAKE GEORGE
LAKE JULIA
LAKE LUCERNE
LAKE LUZERNE
LAKE MASKENOZHA
LAKE MEDORA
LAKE MITIGWAKI
LAKE NEBAGAMON
LAKE OF THE FALLS
LAKE OZONIA
LAKE PLACID
LAKE PLEASANT
LAKE POLLY
LAKE TAHKODAH
LAKE TITUS
LAKE TOMAHAWK
LAKEVILLE
LAND 0' LAKES
LAPOND LAKE
LAPORTE
LASSELLVILLE
LAURA LAKE
LEAD MTN
LEICESTER
LENOXVILLE
LEROY
LEWIS
LIBERTY
LIMA MTN
LISBON
LITCHFIELD
LITTLE BIGELOW MTN
LITTLE BOWSTRING LAKE
LIVERMORE FALLS
LONDONDERRY
LONG ISLAND LAKE
LONG LAKE SE
Scale
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'xl5 '
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'xl5 '
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
15'
7.5'
7.5'
State
MN
PA
NY
NY
WI
PA
WI
NY
WI
WI
NY
PA
MI
MI
WI
WI
NY
NY
NY
MN
WI
NY
WI
PA
WI
MN
PA
NY
MN
ME
MA
PA
PA
NY
ME
MN
NH
CT
ME
MN
ME
VT
MN
WI
Published date
1963
1966/1973
1951
1960/1981
1982
1968/1978
1973
1966
1982
1965/1982
1968
1954/1969/1973
1948/1975
1982
1961/1975
1973
1964
1979
1954
1960
1971
1964
1982
1966/1983
1982
1963
1969
1945
1970
1957
1969/1979
1946/1969
1969
1978
1961/1973
1959
1967
1956/1970
1956
1970
1967
1957
1960
1970
                              (continued)
        173

-------
TABLE 8-2 (continued)
USGS map name
LONG POND
LOPEZ
LOUDS ISLAND
LOVEWELL HTN
LOWER VERMILLION LAKE
LUBLIN NW
LUDLOW
LUTSEN
LYNDONVILLE
MAKINEN
MANCELONA
MANCHESTER NORTH
MANCHESTER SOUTH
MANISTIQUE EAST
MANITOWISH LAKE
MANOMET
MANSFIELD
MARBLEHEAD
MARBLEHEAD NORTH
MARCELL
MARION
MARION LAKE
MARLBOROUGH
MARSH-MILLER LAKE
MARSHALL CREEK
MASCOMA
MATTAWAMKEAG
MAYNARD
MC KEEVER
MC KENZIE LAKE
MC KINLEY
MC NAUGHTON
MC NEARNEY LAKE
MECHANIC FALLS
MEMPHREMAGOG
MENDHAM
MERCER
MERCER
MERCER LAKE
MERIDEN
MERRIWEATHER
MERWIN LAKE
MICHIGAMME
MICHIGAMME
Scale
15'
7.5'
7.5'
15'
7.5'
7.51
7.51
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
State
ME
PA
ME
NH
MI
MI
VT
MN
VT
MN
MI
NH
NH
MI
MI
MA
MA
MI
MA
MN
NC
MN
CT
MI
MI
NH
ME
MA
NY
MI
MI
MI
MI
ME
VT
NJ
MI
MI
MI
CT
MI
MI
MI
MI
Published date
1922
1969
1955/1973
1957
1982
1969
1971
1959
1951
1951/1969
1956
1974
1968
1972
1981
1977
1964/1979
1964
1970
1970
1962
1967/1983
1967/1972
1975
1982
1927
1940
1965/1979
1958
1982
1982
1982
1951/1975
1981
1953
1954/1981
1955
1973
1971
1967/1972
1982
1972
1956
1956
                               (continued)
         174

-------
TABLE 8-2 (continued)
USGS map name
MIDDLE HADDAM
MIODLETOWN
MILAN
MILFORD
MILFORD
MILLBROOK
MILLERS FALLS
MILLINOCKET
MILLINOCKET LAKE
MINOCQUA
MINONG
MITAWAN LAKE
MITCHELL LAKE
MOEN LAKE
MOHEGAN LAKE
MOLASSES POND
MOLE LAKE
MONADNOCK
MONDEAUX DAM
MONICO NE
MONOMOY POINT
MONROE
MONTAUK POINT
MONTEREY
MONTICELLO
MONTROSE WEST
MONTVILLE
MOODUS
MOOSE EAR LAKE
MOOSEHEAD LAKE
MOOSELEUK LAKE
MORRILL
MOSCOW
MOUNT DESERT
MOUNT MATUMBLA
MOUNT POCONO
MT BLUE
MT CARMEL
MT CHOCORUA
MT GRACE
MT KEARSARGE
MT KINEO
MT MANSFIELD
MT MARCY
Scale
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
15'
15'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'xl5'
State
CT
CT
NH
CT
MA
NY
MA
ME
ME
MI
WI
MN
MN
WI
NY
ME
WI
NH
WI
WI
MA
NY
NY
MA
NY
PA
CT
CT
WI
ME
ME
ME
PA
ME
NY
PA
ME
CT
NH
MA
NH
NH
VT
NY
Published date
1961/1971
1965/1972
1930
1960/1971
1968/1978
1960
1977
1951
1954
1966
1982
1981
1970
1982
1956/1981
1982
1973
1949
1970
1965
1974
1957/1981
1956
1973
1966/1982
1967/1978
1958/1970
1967/1973
1978
1957
1963
1960/1973
1946/1969/1976
1956
1968
1966/1973
1968
1967/1972
1958
1977
1956
1973
1948/1980
1979
                               (continued)
        175

-------
                       TABLE  8-2  (continued)
USGS map name
Scale
State   Published date
MT PAWTUCKAWAY
MT TOBY
MT TOM
MT VALHALLA
MT WORCESTER
MT ZIRCON
MUNISING
HUNKER ISLAND
MUSKALLONGE LAKE E
MUSKALLONGE LAKE SE
MUSKALLONGE LAKE SW
MUSQUACOOK LAKES
MYSTIC
NAMAKAN ISLAND
NAMEKAGON LAKE
NANTUCKET
NARRAGANSET PIER
NARROWSBURG
NASHUA NORTH
NASHUA SOUTH
NASHVILLE
NAUGATUCK
NAUSHON ISLAND
NAWAKWA LAKE
NED LAKE
NEW HAVEN
NEW LONDON
NEWBERRY
NEWCOMB
NEWFIELD
NEWFIELD
NEWFOUNDLAND
NEWFOUNDLAND
NEWPORT
NEWTON FALLS
NEWTON WEST
NICATOUS LAKE
NISULA
NOBLETON
NORCROSS
NORFOLK
NORTH BROOKFIELD
NORTH CONWAY
NORTH EAST CARRY
7.5'
7.5'
7.5'
7.5'
7.51
7.5'
15'
7.5'
. 7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
15'
15'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
15'
7.5'
7.5'
15'
15'
NH
MA
MA
WI
VT
ME
MI
MN
MI
MI
MI
ME
CT
MN
WI
MA
RI
PA
NH
MA
WI
CT
MA
MI
MI
CT
CT
MI
NY
ME
NH
NO
PA
ME
NY
NO
ME
MI
WI
ME
CT
MA
NH
ME
1981
1971
1972/1979
1964
1968
1967
1958
1959
1968
1968
1968
1932
1958/1970
1967/1983
1971
1972
1957/1970/1975
1968
1968/1974
1965/1979
1965
1964/1984
1972
1968
1955
1967/1972
1958/1970
1973
1954
1958
1958
1954/1971
1966/1973
1982
1968
1942/1954/1971
1932
1982
1982
1951
1956/1969
1967
1942
1954
                                                      (continued)
                                176

-------
TABLE 8-2 (continued)
USGS map name
NORTH HARTLANO
NORTH WATERFORD
NORTH WHITEFIELD
NORTH WINDHAM
NORTHERN LIGHT LAKE
NORTHWOOD
NORTON
NORWAY
NORWICH
NUMBER FOUR
OGISHKEMUNCIE LAKE
OHIO
OJIBWAY LAKE
OLD FORGE
OLYPHANT
ONECO
ONSET
OQUOSSOC
ORANGE
ORLAND
ORONO
ORSON
ORWELL
ORWELL
OSCAWANA LAKE
OSSINING
OSSIPEE LAKE
OSWEGATCHIE
OSWEGATCHIE SE
OTIS
OTISVILLE
OWLS HEAD
OXBOW
OXFORD
OXFORD
OXFORD
PAGE
PALISADE
PALMER
PANTHER LAKE
PAPOOSE LAKE
PARADOX LAKE
PARRISH
PAWTUCKET
Scale
7.5'
7.51
7.5'
7.5'
7.5'
7.5'
7.51
15'
7.5'
15'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
State
NH
ME
ME
ME
MN
NH
MA
ME
CT
NY
MN
NY
MN
NY
PA
CT
MA
ME
MA
ME
ME
PA
NY
VT
NY
NY
NH
NY
NY
MA
NY
NY
ME
ME
MA
NY
NY
MN
MA
NY
WI
NY
WI
RI
Published date
1959/1980
1963
1970
1957/1970/1977
1959/1976
1981
1964/1979
1946
1983
1957
1959
1954
1981
1954
1946/1969/1976
1953/1970
1967
1940
1977
1982
1955
1968/1978
1959
1949
1956
1967/1979
1958
1966
1966
1973
1969
1968
1965
1980
1969/1979
1949
1943
1970
1969/1979
1959
1981
1973
1973
1949/1970/1975
                               (continued)
         177

-------
TABLE 8-2 (continued)
USGS map name
PAXTON
PEACH LAKE
PEARSON
PECK LAKE
PECKS POND
PELICAN LAKE
PELKIE
PENACOOK
PENOBSCOT
PENOBSCOT LAKE
PERCH LAKE
PERCY
PERENT LAKE
PERKINSTOWN
PETERBOROUGH
PETERSHAM
PHARAOH NTN
PHELPS
PHILLIPS
PHIPPSBURG
PIATT LAKE
PICKEREL
PICKET LAKE
PICKFORD SE
PIERCE POND
PIERHONT
PIKE LAKE
PINE LAKE EAST
PINE LAKE WEST
PIONEER LAKE
PISECO LAKE
PITTSFIELO EAST
PITTSFIELD WEST
PITTSTON
PLAINFIELO
PLAINFIELO
PLEASANT MTN
PLEASANT VALLEY
PLEASANT VIEW SUMMIT
PLYMOUTH
PLYMOUTH
PLYMOUTH
PLYMPTON
POCASSET
Scale
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
15'
15'
15'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
State
MA
NY
WI
NY
PA
MN
MI
NH
ME
ME
MI
NH
MN
WI
NH
MA
NY
WI
ME
ME
MI
WI
MN
MI
ME
NH
WI
MN
MN
WI
NY
MA
MA
PA
VT
CT
ME
NY
PA
NH
ME
MA
MA
MA
Published date
1965/1979
1958/1970
1973
1970
1966/1973
1959
1954
1956
1981
1956
1954
1930
1960
1969
1953
1969
1973
1981
1929
1957
1951/1975
1973
1963
1964/1975
1958
1979
1971
1959/1976
1959/1976
1981
1954
1973
1973
1947/1969/1976
1953
1983
1963
1957/1981
1966/1973
1928
1982
1977
1977
1967/1979
                               (continued)
        178

-------
                      TABLE 8-2 (continued)
USGS map name
Scale
State   Published date
POCONO PINES
POHOPOCO MTN
POINT ISABELLE
POLAR
POMROY LAKE
POND EDDY
POPOLOPEN LAKE
PORT JERVIS SOUTH
PORTER CORNERS
POTATO LAKE
POULTNEY
POUND RIDGE
POWELL
POWELL
POWNAL
PRAIRIE LAKE
PRESQUE ISLE
PROCTOR
PROMISED LAND
PULASKI
PUTNAM MTN
QUAB6IN RES
QUADGA LAKE
RAGGED LAKE
RAGGED LAKE
RAINBOW FALLS
RANGE
RANGELEY
RAQUETTE LAKE
RAYMOND
READFIELD
READING
RED BEACH
RED ROCK
REDFORD
REDWOOD
REMER
RENSSELAERVILLE
REPUBLIC
REPUBLIC SW
RESERVOIR POND
REXTON
RHINELANDER
ROBERTS LAKE
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.51
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.51
7.5'
 15'
7.5'
7.5'
7.5'
 15'
 15'
7.51
7.51
7.51
7.5'
7.5'
7.5'
7.5'
7.5'
7.51
7.5'
7.5'
7.51
7.5'
7.5'
7.5'
          1966/1973
          1960/1983
          1948/1975
          1973
          1968
          1965/1973
          1957/1981
          1969/1983
          1968
          1971
          1964/1972
          1960/1971
          1969
          1981
          1954
          1963
          1981
          1944
          1966/1973
          1956
          1966
          1967/1979
          1981
          1954
          1968
          1964
          1978
          1949
          1954
          1981
          1980
          1966/1979
          1949
          1969
          1968
          1958/1982
          1971
          1946
          1955/1975
          1955/1975
          1972
          1964
          1982
          1973

             (continued)
                                179

-------
TABLE 8-2 (continued)
USGS map name
ROOSEVELT LAKE
ROSCOE
ROUND LAKE
ROUND POND
ROUSSEAU
ROWE
ROWLAND
ROXBURY
ROYALSTON
RUTLAND CENTER
SAGAMORE
SAINT JOHN POND
SALEM DEPOT
SALT POINT
SANDWICH
SANTANONI PEAK
SAPONAC
SARANAC LAKE
SARGENTVILLE
SARONA
SAWBILL CAMP
SAXTONS RIVER
SAYLORSBURG
SAYNER
SCHOODIC
SCHROON LAKE
SCRAGGLY LAKE
SCRANTON
SEAGER
SEARS POND
SEARSMONT
SEARSPORT
SEBAGO LAKE
SEBEC
SEBEC LAKE
SEBOOMOOK LAKE
SEUL CHOIX POINT
SEVEN ISLANDS
SHAGAWA LAKE
SHELL LAKE
SHELL LAKE
SHELLDRAKE
SHELVING ROCK
SHICKSHINNY
Scale
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'xl5 '
15' f
7.5'xl5 '
7.5'
7.5'
7.5'
15'
7.5'
7.5'
15'
15'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
15'
15'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
State
MN
NY
NY
ME
MI
MA
PA
CT
MA
NY
MA
ME
NH
NY
MA
NY
ME
NY
ME
WI
MN
VT
PA
WI
ME
NY
ME
PA
NY
NY
ME
ME
ME
ME
ME
ME
MI
ME
MN
MN
WI
MI
NY
PA
Published date
1970
1965/1982
1954/1980
1955
1982
1973
1966/1983
1955/1970
1971
1959
1967/1979
1958
1968/1979
1963
1972
1979
1957
1979
1981
1981
1960
1957
1960/1983
1982
1947
1953
1941
1947/1969/1976
1945
1943
1960/1973
1973
1942
1940
1950
1954
1972
1955
1965
1963
1982
1951/1975
1966
1954/1969/1977
                              (continued)
        180

-------
TABLE 8-2 (continued)
USGS map name
SHIN POND
SHINGLE MILL LAKE
SHINGLETON
SHIRLEY
SHOHOLA
SHREWSBURY
SHUTESBURY
SIASCONSET
SIDE LAKE
SIOUX PINE ISLAND
SIREN EAST
SIREN WEST
SKYTOP
SLATE LAKE EAST
SLATE LAKE WEST
SLOATSBURG
SLOCUM
SMARTS MTN
SMITH LAKE
SMOKY LAKE
SMYRNA MILLS
SNIPATUIT POND
SNOW BAY
SNOWBANK LAKE
SOLDIER POINT
SOLON SPRINGS
SOMERSET
SOO JUNCTION
SOUDAN
SOUTH CANAAN
SOUTH EDWARDS
SOUTH GROVELAND
SOUTH LAKE
SOUTH MERRIMACK
SOUTH RANGE
SOUTH SANDISFIELD
SOUTHBRIDGE
SOUTHINGTON
SOUTHWICK
SPENCER LAKE
SPIDER LAKE
SPIDER LAKE
SPOONER LAKE
SPRING HILL
Scale
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.51
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
7.5'
7.5'
State
ME
MN
MI
MA
PA
MA
MA
MA
MN
MN
WI
WI
PA
MN
MN
NY
RI
NH
MI
MI
ME
MA
MN
MN
MN
WI
MA
MI
MN
CT
NY
MA
MN
NH
MI
MA
CT
CT
MA
ME
ME
WI
WI
CT
Published date
1954
1971
1958
1965/1979
1965/1983
1969/1979
1964/1979
1972
1964
1956
1982
1982
1943/1968/1973
1981
1981
1955
1955/1970
1979
1972
1981
1955
1977
1963
1981
1968/1983
1982
1967/1979
1973
1956/1969
1956/1969
1969
1966/1979
1960
1968
1946/1975
1958/1969
1967/1979
1968/1984
1972
1958
1961
1971
1982
1983
                               (continued)
          181

-------
TABLE 8-2 (continued)
USGS map name
SPRINGBROOK
SPRINGFIELD
SQUAM MTNS
ST ALBANS
ST FRANCIS
ST GERMAIN
ST JOHNSBURY
ST ZACHARIE
ST. REGIS MTN
STACYVILLE
STAMFORD
STANBERRY EAST
STANBERRY WEST
STANHOPE
STAR LAKE
STARK
STARKS
STARRUCCA
STATELINE LAKE
STERLING
STERLING
STETSON
STEWART LAKE
STILLWATER
STINGY LAKE
STOCKHOLM
STONE LAKE
STORMY LAKE
STRATTON
STRONGS
STUEBEN
SUDBURY
SUGAR CAMP
SUGAR HILL
SULLIVAN
SULLIVAN CREEK
SUNAPEE
SUNCOOK
SUNDERLAND
SUNKEN LAKE
SWEET VALLEY
SYLVAN FALLS
TABORTON
TAHQUAMENON LAKES
Scale
7.5'
15'
7.5'
7.5'
15'
7.5'
15'
15'
7.5'xl5 '
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
State
WI
ME
NH
VT
ME
WI
VT
ME
NY
ME
VT
WI
WI
NJ
WI
NY
WI
PA
MI
MA
PA
ME
MN
PA
MN
ME
WI
WI
ME
MI
MI
VT
WI
NH
ME
MI
NH
NH
VT
MI
PA
NY
NY
MI
Published date
1971
1931
1980
1964/1972
1930
1970/1982
1949
1957
1979
1953
1954
1971
1971
1954/1981
1982
1968
1965/1982
1968/1978
1982
1968/1979
1965/1973
1955
1971
1954/1969/1976
1964/1976
1953
1971
1982
1956
1951
1958
1946/1972
1970
1967
1982
1951/1976
1955
1967
1968
1972
1946/1969
1964
1946
1972
                               (continued)
          182

-------
TABLE 8-2 (continued)
USGS map name
TAKUCMICH LAKE
TARRIFVILLE
TAUNTON
TELOS LAKE
TEMPLETON
TENDERFOOT LAKE
THAYER
THE FORKS
THE GLEN
THIRTEENTH LAKE
THOMPSON
THOMPSON
THOR SE
THORNHURST
THOUSAND ISLAND LAKE
THREE LAKES
THREE LAKES
THUNDER LAKE
TIGERVILLE
TIM MOUNTAIN
TIMBERLAND
TIPLER
TISBURY GREAT POND
TOBYHANNA
TOGUS POND
TOLLAND CENTER
TOM LAKE
TOMHANNOCK
TRADE LAKE .
TRAPPERS LAKE
TRAVELER MTN
TREGO
TRENARY
TUG MTN
TUNK LAKE
TUNK LAKE
TUNK MOUNTAIN
TUPPER LAKE
TURTLE LAKE
TURTLE-FLAMBEAU FLOW AGE
TWELVEMILE POND
TWIG
ULSTER
UNCASVILLE
Scale
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
15'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
15'
15'
15'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
State
MN
CT
MA
ME
MA
MI
MI
ME
NY
NY
CT
PA
MN
PA
MI
MI
WI
MN
SC
ME
WI
WI
MA
PA
ME
MA
MN
NY
WI
MI
ME
WI
MI
ME
ME
ME
ME
NY
WI
WI
PA
MN
PA
CT
Published date
1963
1956/1970
1978
1957
1970
1981
1982
1956
1968
1954
1955/1970
1968/1978
1969
1965/1983
1981
1956
1970
1970
1959
1970
1982
1970
1972
1965/1973
1982
1958/1969
.1959
1954
1983
1983
1955
1982
1958
1941
1957
1982
1982
1954
1978
1973
1943/1968/1973
1953/1969/1975
1957/1969
1984
                                (continued)
           183

-------
                       TABLE  8-2  (continued)
USGS map name
Scale
State   Published date
UNION
UNIONVILLE
UPPER SARANAC LAKE
UTICA EAST
UXBRIDGE
VAN BUREN
VASSALBORO
VERBANK
VINEYARD HAVEN
VOULNTOWN
WABANA LAKE
WABASSUS LAKE
WABENO
WADING RIVER
WAITE
WALDOBORO WEST
WALES
WALLINGFORD
WALLINGFORD
WANAQUE
WAREHAM
WARMAN
WARREN
WASHINGTON
WATERBURY
WATERSMEET
WATSON
WAUSAUKEE N
WAUSAUKEE SOUTH
WAWAYANDA
WAYMART
WEBSTER
WEBSTER
WEEKS MILLS
WELLFLEET
WELLS
WENTWORTH
WESLEY
WEST CANADA LAKES
WEST GRANVILLE
WEST KILL
WEST PIERREPONT
WEST POINT
WEST TORRINGTON
7.5'
7.5'
7.5'xl5 '
7.5'
7.5'
15'
15'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
15'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
15'
7.5'
7.5'
7.5'
7.5'
7.5'
ME
NY
NY
NY
RI
ME
ME
NY
MA
CT
MN
ME
WI
NY
ME
ME
MA
VT
CT
NJ
MA
MN
MA
ME
CT
MI
MI
WI
WI
NJ
PA
MA
WI
ME
MA
VT
NH
ME
NY
MA
NY
NY
NY
CT
1965/1973
1969
1979
1955
1969/1979
1951
1956
1960
1972
1953/1970/1975
1970
1963
1972
1967
1940
1965/1973
1967/1979
1955
1967/1972
1954/1971
1972
1968
1969
1961/1973
1968/1972
1982
1963
1982
1982
1954
1946/1969
1969/1979
1982
1982
1972
1967
1974
1941
1954
1971
1960
1969
1957/1981
1956/1969
                                                     (continued)
                                184

-------
TABLE 8-2 (continued)
USGS map name
WESTERNVILLE
WESTFORD
WESTHAMPTON
WEYMOUTH
WHITE MILLS
WHITE PLAINS
WHITE SAND LAKE
WHITEFACE
WHITEFIELD
WHITEHAVEN
WHITING
WHITMAN
WHITNEY BAY
WICKFORD
WILBUR LAKE
WILKES-BARRE EAST
WILKES-BARRE WEST
WILLIAMSTOWN
WILLIAMSTOWN
WILLOW RIVER
WILLSBORO
WILMINGTON
WILMINGTON
WILSON LAKE
WILTON
WINCHENDON
WINCHESTER
WINCHESTER
WINDHAM
WINDSOR DAM
WINN
WINNIPESAUKEE
WINONA SOUTH
WINSLOW LAKE
WINSTED
WINTERVILLE
WINTHROP
WITCH LAKE NE
WITHERBEE
WOLF MTN
WOODBORO
WOODBURY
WOODFORD
WOODRUFF
Scale
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
15'
7.5'
"'.S1
7.5'
7.5'
7.5'
7.5'
7.5'
7.51
7.5'
7.5'
7.5'
15'
15'
7.5'xl5 '
7.5'
7.5'
7.5'
15*
7.5'
7.5'
7.5'
15'
15'
7.5'
7.5'
7.5'
15'
7.5'
7.5'
7.5'xl5 '
7.5'
7.5'
7.5'
7.5'
7.5'
State
NY
CT
MA
MA
PA
NY
WI
MN
NH
PA
ME
MA
MI
RI
MN
PA
PA
MA
NY
MN
NY
VT
NY
WI
ME
NH
WI
WI
NH
MA
ME
NH
MI
MI
CT
ME
ME
MI
NY
NY
WI
CT
VT
WI
Published date
1955/1978
1952/1970
1972
1971/1979
1967/1983
1967/1979
1981
1956
1935
1947/1969/1976
1949/1977
1977
1964/1976
1957/1970/1975
1981
1947/1969/1977
1947/1969/1976
1973
1960
1981
1956
1954
1978
1973
1968
1971
1955
1981
1953/1974
1967
1960
1956
1982
1982
1956/1969
28
1980
1955
78
1968
1982
1955/1970
1954
1982
                               (continued)
           185

-------
                       TABLE  8-2  (continued)
USGS map name
Scale
State   Published date
WOODS HOLE
WOOSTOCK NORTH
WORCESTER SOUTH
WRENTHAM
YORK BEACH
YORK HARBOR
ZIM
ZOAR
7.51
7.51
7.5'
7.5'
7.5'
7.5'
7.5'
7.5'
MA
VT
MA
MA
ME
ME
MN
WI
1967
1966
1973
1964/1979
1956/1973
1956/1973
1951/1969
1973
                               186

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                                  SECTION 9

      POPULATION ESTIMATES FOR SELECTED PHYSICAL AND CHEMICAL VARIABLES
     The primary data outputs from the ELS-I data base are cumulative
distributions for total lake number and total lake area in any population or
subpopulation of lakes explicitly defined by the investigator.  The
distributions presented here were generated from sample data using the
procedures described below (Sectlc., 9.1) for the subpopulation of lakes
<2000 ha within the target population.
     The variables described in this section are those listed in Section 2
(Table 2-1).  The statistics and distributions describing the subpopulations
of lakes are given in Section 9.2.  Cumulative frequency distributions are
presented as F(x) or l-F(x), and area! distributions as G(x) or l-G(x),
depending on whether low or high concentrations (or values), respectively,
are of primary interest (Figures 9-1 through 9-179).

9.1  APPLICATIONS OF THE DESIGN

9.1.1  Defining the Target Population
     The identity of the map population, subsequently refined by the
exclusion of non-target lakes (Volume I, Section 2.2.4), defines the target
population.  The number of lakes comprising the target population is not
known, but rather estimated, because non-target lakes were identified only
in the probability sample.  In contrast, the map population, because of its
operational definition as all lakes appearing on 1:250,000-scale USGS maps
(Volume I, Section 2.2.2), is known precisely and serves as the point of
reference.  The map population is larger than the target population by
virtue of the exclusion criteria set forth for non-target lakes.  The sample
frame is the structure imposed on the map population by stratification and
generation of the list.  The frame population and sample selection are
                                      187

-------
  stratum-specific,  as  is  the  estimation  process.   Sample  data must  be
  weighted  by  stratum-specific weights when extrapolating  from sample results
  to estimates of  population parameters.  The method of extrapolating to the
  population is given in Section 9.1.2 and its importance  is discussed in
  Volume  I, Section  4.1.2.1.
      In the broadest  sense,  the target  population is all those lakes
  appearing on 1:250, 000-scale USGS topographic maps that could be sampled to
 yield data to satisfy the objectives of the ELS- I.  However, the inherent
  flexibility of the design permits any subpopulation of lakes from this
 overall target population to be defined on the basis of any criteria
 established from the attributes or measured variables for any lake.  The
 definition of these still smaller populations can be determined to answer a
 particular question.   For example,  a subpopulation of interest  can be
 defined as that  set of lakes  characterized  by elevation  greater than 300  m.
 Or the  subpopulation might be defined  on the  basis of sulfate or dissolved
 organic carbon concentrations greater  than  or equal  to X.   Estimates of
 subpopulation characteristics can be made in  the  same manner as  for the
 entire  target population  by applying the proper weights.

 9-1>2   Estimating the  Target  Population  Size and Associated Variance
        from Sample  paja
     The number of  target  lakes (N)  within an alkalinity map class  stratum
 is estimated  by the equation:
                               *   A
                                 -Nn,
where:
       *
      N  = the number of lakes in the stratum map population, and
      Nn "   e estimated number of non- target lakes in the stratum
N  is known from the initial map population (Volume I,  Section 2.2.2)
     A                                                              ' '
     Nn must be calculated from the equation:
                         Nn - (N*/n*)  [n+ (n   /q)]f
                                      188

-------
where:
     n  - the total number of lakes in the probability sample selected
          from the map population within the alkalinity map class stratum
    nnb = t*ie num^er f lakes selected in the probability sample determined
          to be non-target by the examination of large-scale maps

    n   = the number of lakes in the probability sample determined to be
          non-target during field sampling
             *
               - nk - n \
                              proportion of completion, i.e. the proportion
n   nnb " no
where:
                 " nnh   /    f lakes selected for visitation that were
                    nD        actually visited.
     n  - the number of lakes not visited, representing incompleteness
          in the field sampling.


     Some of the lakes scheduled for field visitation subsequently were not

visited by field crews (Volume I, Section 2.2.4).  The group of lakes that

were not visited contained an unknown number of lakes that would be

classified as non-target.  It was subsequently necessary to expand the

number of non-target lakes observed by the field crews (n  ) by q to yield
                                                         na
an estimate of the total  number of non-target lakes in the field sample

(including the number of non-target lakes expected within n ).

     Weighting, or expansion, factors are necessary to estimate the

population of lakes in the target population and are calculated as follows:

                             A  ***      it
                         W = N/n     -  N /n'

where:
      ***    *
     n    = n  " nnb " nna " no' the number f lakes visited and
            characterized as target, i.e., the number of lakes from which
            water samples were obtained, and
             *                                                *
     n'  =  n q, the effective sample size, used in place of n  to account
            for incompleteness.
                                      189

-------
 Rearranging the equation yields
                                A     ***
                                N - Wn
      The total  area of target lakes  (A)  is  estimated  similarly:
                               A     ,
                               A -  WA.,
 with  summation  over all  lakes in the  stratum  sample.
                   A     A
      Variances  of N and  A,  for single strata,  are estimated by:
      A  A       *   it                   -t
      V(H)  -  [N (N  -  n')/(n'  -  l)][n   /n'][(n'  - n    )/n'], and

      V(A)  -  [N*(N*  -

 For multiple  strata,  estimates  and variances are additive,
      N  -  Nh, V(N)  -v(Nh), A = E Ah, and Y(A) =  0(Ah).
 Standard errors (of estimates)  are the square roots of variances.  (To use
 the above  formulae, see Table 4-4, Volume I, Section 4.2.2, and calculate n'
 from  n' -  N*/VI.)
      In all analyses, the sample was treated as a simple random sample
 within  strata.  The ordering of the lakes and the systematic selection
 process increase  precision over a random sample.   Therefore, estimates of
 precision  are conservative.

 9.1.3  SubDODulations
      Estimations of subpopulation parameters require more structure than the
 basic population estimates and are generally of more scientific interest.
 For example,  each observed value of X defines a subpopulation of lakes
 having a value of X < that value (lakes < 300 m,  lakes < pH 6.5, etc.).
 Estimates and corresponding variances can be constructed for these
 subpopulations over any combination of strata if the identification of the
 subpopulation is explicit.
     For economy of computation, the algorithms used in generating all  the
statistics  for the Survey are quite different,  but  are mathematically
identical  and best understood by formulae generated  as a simple modification
                                      190

-------
of the single stratum equations, given in Section 9.1.2:
                   ***                ^-     x-^
     replace each n    by n  and each 2^ by  2-, ,
              ***
                  hv r

where:
          nz  = the number of sampled lakes in the subpopulation z and
        2 z  = the summation over the sample lakes in the subpopulation z.

     A useful generalization, appropriate for any subpopulation and any
combination of strata, is that

                         N = w, and A = 2>A,

where summation is over the appropriate subset of sample lakes in the
appropriate strata, and where the weights (W) are assigned according to the
stratum in which the lake belongs in the map population.
     A further generalization used in the data analyses leads to similar
formulae for mean and variance of any variable, X, over any subpopulation
and combination of strata:
     Mean(X) =   WX/, an(J Var1ance(x) =

These are estimates of the parameters of the population of lakes defined by
the set of sample lakes in the summation, and characterized by the
distribution, F(X) (Section 9.2.2).
     The importance of the weighting factors cannot be overemphasized.   As
is shown by example in Volume I, Section 4.1.2, and stated several times in
this report (for example, Section 9.1.2), estimating population parameters,
or examining relationships among variables with the expectation that these
relationships are representative of the population, from sample data without
accounting for weights can lead to erroneous calculations and incorrect
interpretation.
                                      191

-------
 9.1.4  Restrictions
      The use and Interpretation of any data set are restricted by the
 design,  the quality of the data obtained  and the sampling  protocols.   The
 frame and target populations and the period of sampling  are  the primary
 considerations influencing the proper interpretation of  the  ELS-I data.
      The period of sampling restricts conclusions to the fall  of 1984.
 Until  Phases II and III are completed,  the  accuracy of extrapolating  the
 index sample to other times of the year or  to other years  will  not be known.
      Additional  restrictions result from  the sampling frame.   Most simply,
 no  conclusions can be drawn for lake populations  not included  in the
 original  frame.   Lakes less than 4 ha in  surface  area are  generally not
 shown  on 1:250,000-scale USGS maps used to  establish the frame  population.
 Consequently,  the ELS-I omitted lakes less  than 4 ha because lakes of this
 size  are generally not represented at this  map  scale.  However,  small lakes
 may represent  an  important  resource that  could  not  be sampled  practically or
 statistically  in  this  study.   Therefore,  no  direct  conclusions  can  be drawn
 about  this  population  of lakes.
     As  was  noted 1n  Section  9.1.3,  it  is essential  to the accurate
 interpretation  of the  data  to identify  clearly  any  population for  which
 inferences  are made.   However,  there  is considerable flexibility  in defining
 a population to be  described  if it  is a subset of the original  target
 population.

 9.2  DESCRIPTIVE  STATISTICS AND  CUMULATIVE DISTRIBUTIONS

     The primary  objectives of the  ELS-I were to  characterize the chemistry
 of  lakes in potentially  sensitive regions of the U.S., to estimate the
 numbers of low ANC  and  low pH lakes, to identify where those lakes are and
 to describe their characteristics.  The Survey addresses these objectives by
 its stratified design permitting description of the populations of lakes in
 each of the 33 strata, representing the throe alkalinity map classes within
 each of the 11 chosen subreglons (Volume I,  Sections 2.1  to 2.3).  These
 strata represent the basic analytic units, but analyses  also may be
performed on any combinations of strata that have meaning to the
 investigator within regions, subregions, or  subpopulations.

                                      192

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9.2.1  Population Distributions
     Each population described 1s summarized on a single page of output for
each variable as the cumulative distributions, supplemented by descriptive
statistics.  Tables of summary statistics are generated from these outputs.
The differences among the strata of the design can be inspected by using a
combination of the distribution plots and tabular information provided on
these data outputs.
     Data presentations as cumulative distributions enhance the utility and
flexibility of the ELS-I data base.  Specifically, low pH or low ANC, for
example, are not unequivocally or universally defined.  Thus, several
reference values (Volume I, Sections 4.5 and 4.6) for each of the primary
variables were chosen, primarily to facilitate comparisons among strata,
subregions, regions, or subpopulations.  However, the strength of the
designed output, as well as of the Survey design, is that any reference
value can be evaluated, providing flexibility in interpretation of the
output.  As the understanding of acidification processes improves, these
values can be changed, ensuring the future utility of the ELS-I data base.
The considerations noted in Volume I, Section 4.1.2.2, however, are
important in selecting additional reference values.

9.2.2  Definitions of the Descriptive Statistics;  Interpretation of
       F(x) and G(x) Data Output
     Each population description (Figures 9-1 through 9-179) is identified
by the variable and by the subset of lakes constituting the population being
examined.  A subset may represent all lakes in the Survey unit, for example,
a single stratum (1A1), a subregion (1A), a region (1), or a subpopulation.
                                     A     A
     The basic population estimates, N and A, and their estimated standard
                                                     A
errors are presented in the headings of the output.  N is defined as the
                                                                       A
estimated total number of lakes in the population being described, and A is
the estimated sum of the total lake area, over all lakes in that population
(denoted only as N and A on the output).  The indicated sample size
(equivalent to n***, Volume I, Section 2.3.2) is the number of sampled lakes
in the target population.  Reference values (X j, X-, X 3) chosen for
comparative analyses complete the heading material.
                                      193

-------
      9.2.2.1  Distributions--Interpretation of the distribution F(x) is
 given in Section 4.3, Volume I.  This section describes the distribution
 l-F(x).  For any reference value for variable X, l-F(x) is interpreted as
 the estimated proportion of lakes having a value of X >x.  The distribution
 l-F(x) is calculated as the ratio of NX, the estimated number of lakes
 having a value of X >x, to N.  The upper 95 percent confidence bound on N ,
 also scaled by dividing by N, is shown as a dashed line on Figures 9-1
 through 9-179.  Although only a one-sided upper 95 percent confidence bound
 is shown, a two-sided 90 percent bound can be made by using the existing
 bound and one equidistant below the distribution curve. This procedure
 would also provide a lower 95 percent one-sided bound.
      The function l-G(x) is interpreted similarly,  as the  estimated
 proportion of lake area in the population having a value of X >x,  for any
 variable X.   This cumulative area!  curve and its confidence curve  are
 determined analogously to the l-F(x)  curve.
      An example of interpreting these distributions is  derived from
 Figure 9-1.   At the value of extractable Al  = 50 ug L"1 for clearwater lakes
 <2000 ha, F(50) = 0.05 (calculated  and shown in the figure as p   = 0.052);
 the upper bound is read from the dashed line as 0.06.   These values are
 multiplied by the estimated total number of  lakes  in  the population,  4584,
 to yield 229  (calculated and shown  in the figure as N     237)  as  the
 estimated number of lakes in the population  with an upper  confidence  bound
 for that number,  275 (shown in  the  figure as Ncul  = 326).   The  calculated
 values  and those derived from the figure differ due to  the imprecision  of
 obtaining the proportions (0.05 and 0.06)  from  the  curve.   Reading  values
 from the curves is  suitable only for  obtaining  rough  estimates, due to  the
 introduction  of potential  error.  Precise  computation requires  the  use  of
 the  data base and  the  appropriate algorithms.
      Similarly,  at  extractable  Al = 50  ug  L"1,  the  l-G(x)  curve yields  0.02
 (calculated and  shown  in  the  figure as gc] = 0.025) and  0.03, which
multiplied by total  lake  area in the population  (277,621 ha) yields
5,552 ha  (calculated and  shown  in the figure to be A   = 6,959 ha)   and
8,329 ha  (shown  in the figure to be Acul = 10,769 ha) for the estimate and
upper bound for the lake area above extractable Al = 50 ug  L"1.  Again,
deriving estimates from the distribution plots is discouraged.

                                      194

-------
     9.2.2.2  aMi$--Associated with  each  distribution  are  the
following descriptive statistics:


     t    Mean and standard deviation,  appropriately weighted to reflect the
          estimated distribution,  l-F(x) [or  F(x)].  There are no comparable
          statistics for l-G(x)  [or G(x)].

     t    MIN and MAX are the  minimum and  maximum values of  variable X
          observed 1n samples  for  the population or subpopulation beinq
          examined.                                                   y

     t    The median is  the estimated value of  variable X such that half the
          number of lakes,  or  half the  lake area, in the population are
          above (or below)  this  value.

     t    The quintlies  (Qlf Q., Q3,  Q4, Q5)  are the values  of X that
          partition the  distribution  into  5 equal parts (e.g., the 4th
          quintile 1s the 80th percentile; Q5 1s the maximum value).  These
          values are particularly  useful in comparing differences among
          subpopulations.                                             3

         For each of the designated  reference  values of variable X, denoted
          AC,  is printed  the corresponding value of:

                    PC' NC  and Ncu or gc, AC  and ACU

          where   pc  -  the estimated proportion of lakes,

                 NC  -  the estimated number of lakes,

                Ncu  "  the upper con^ X  for < X ).
                                             c       c


    t    For single strata only, an upper  confidence  limit  also  is  provided
         for pc in this  volume.
                                     195

-------
 VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKESs.2000 HA   16 FEB 1986
    Xc1: 50.0    Xc2: 100.0    Xc3:  150.0
 Population Size (N): 4584
 Lake Area (A):  277621
SE(N):  172.6
SE(A): 29162
Sample Size:  496
    1.0
    0.8-
    0.6-
    0.4-
    0.2-
    o.b-
       0.0    10.0   20.0   30.0    40.0    50.0    60.0   70.0   80.0   90.0   100.0
 Min:  0.00    Q,: 1.29    Q2: 3.44     Q3: 6.26     Q4: 11.57     Max: 324.50
Min:
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
dian: 4.56 Pcl: 0.052 Ncl: 237 Ncul: 326
an: 14.26 Pc2: 0.030 Nc2:139 Ncu2: 203
1 Dev.: 36.57 Pc3: 0.020 Nc3: 92 Ncu3: 135

0.8-
0.6-
G(X)
0.4-

0.2-

i
\\
\
\ \
i \
\ V
\l
A>
1 \
\^
0.0 10.0 20.0
: 0.00 QI: 1.23






	
30
Q2






 .







.0 40.0 50.0 60.0
3.44 Q3: 5.98
PROPORTIONS
dian: 4.50 . Gc1: 0.025
Gc2: 0.014
Gc3: 0.006







70.0 80.0 90.0 100
Q4: 9.43 Max: 324.50
AND AREA ABOVE THE VALUE OF Xc
Ac1: 6959 Acu1: 10769
Ac2: 3973 Acu2: 6965
Ac3: 1580 Acu3: 2531
Figure 9-1.  Population Estimates. Aluminum, Extractable (ALEX11), Region 1.
                                     196

-------
 VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKESs.2000 HA   16 FEB 1986
    Xcl:  50.0    Xc2: 100.0    Xc3:  150.0
 Population Size (N): 833
 Lake Area (A):  82577
                    SE(N): 56.1
                    SE(A): 18773
                                Sample Size:  100
    o.o
 Min:
 o.o
0.00
10.0    20.0
 Qv- 2.30
 30.0    40.0   50.0   60.0   70.0    80.0    90.0   100.0
Q2: 5.45    Q3: 9.22     Q4:  29.41     Max: 324.50
 Median:   7.08
 Mean:    35.47
 Std. Dev.: 70.94
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xr
Pc1: 0.144 Nc1: 120
Pc2: 0.121 Nc2:100
Pc3: 0.099 Nc3:82
Ncul: 169
Ncu2: 146
Ncu3: 124
    1.0
   0.6-
   0.6-
   0.4-
   0.2-
   0.0-
Min:
 0.0    10.0   20.0    30.0    40.0    50.0    60.0   70.0   80.0   90.0    100.0
0.00   QI: 1.07     Q2: 3.17     Q3:  5.79     Q4: 9.83     Max: 324.50
Median: 4.13
PROPORTIONS AND AREA ABOVE THE VALUE OF X~
c
GCV
Gc2:
GC3-
0.025
0.022
0.017
Ad'
Ac2:
Ac3'
2072
1784
1439
Acu1:
Acu2:
Acu3:
3125
2790
2378
Figure 9-2.  Population Estimates, Aluminum, Extractable (ALEX11), Subregion 1A.
                                      197

-------
VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKESi2000 HA 16 FEB 1986
Xc1: 50.0 Xc2: 100.0 Xc3: 150.0
Population Size (N): 1090 SE(N): 106.2 Sample Size:
Lake Area (A): 21985 SE(A): 3066
0.8-
0.6-
0.4-
0.2-
REGION 1
104 SUB.RGN B
CLASS

\
\
M
I I
T I
1 V
It
I \
X V
\ \
\ \



0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
Min: 0.00 Q^ 0.92 Q2: 1.99 Q3: 3.99 Q4: 7.21 Max: 260.00
PROPORTIONS AND NUMBERS ABOVE
Median: 2.99 Pc1: 0.060 Nc1: 65 Ncu1: 128
Mean: 10.63 Pc2: 0.029 Nc2:32 Ncu2: 76
Std. Dev.: 27.02 Pc3: 0.003 Nc3:3 Ncu3: 8

0.8-
0.6-
0.4-
02-
THE VALUE OF Xc

1

1
1
\ V
S N
V 1_



0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
Min: 0.00 Qj: 0.92 Q2: 2.70 Q3: 4.55 Q4: 8.49 Max: 260.00
PROPORTIONS AND AREA ABOVE THE
Median: 3.06 Gc1: 0.127 Acl: 2787 Acu1:
Gc2: 0.098 Ac2: 2149 Acu2-
Gc3: 0.005 Ac3: 101 Acu3
VALUE OF Xc
5752
4966
: 239

Figure  9-3 .  Population Estimates, Aluminum, Extractable (ALEX11). Subregion 1B.
                                     198

-------
 VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKES*.2000 HA    16 FEB 1986
         50.0    Xc2:  100.0    Xc3: 150.0
 Population Size (N): 1013
 Lake Area (A):  62306
SE(N):  65.1
SE(A): 12069
                                       Sample Size: 112
    1.0
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
       0.0    10.0   20.0    30.0    40.0   50.0   60.0    70.0    80.0    90.0   100.0
 Min:  0.00   QI: 2.48    Q2: 5.21    Q3:  7.92     Q4: 12.63     Max: 99.20
 Median:   6.55
 Mean:    10.22
 Std. Dev.: 14.52
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
Pc1: 0.018 Nc1: 19
Pc2: 0.000 Nc2:0
PC3: 0.000 Nc3:0
Ncul: 39
Ncu2: **
Ncu3: **
    i.o
   0.8
   0.6-
   0.4
   0.2-
   o.o-
Min:
 0.0    10.0   20.0    30.0    40.0   50.0   60.0    70.0    80.0    90.0   100.0
0.00   QI: 2.16     Q2: 5.28    Q3:  8.45     Q4: 9.89      Max: 99.20
Median: 6.89
 ** Not Defined
                     PROPORTIONS AND AREA ABOVE THE VALUE OF X
               Gc1:  0.016
               Gc2:  0.000
               Gc3:  0.000
         Ac1:  1021
         Ac2:  0
         Ac3:  0
Acu1:  2525
Acu2: **
Acu3: **
Figure  9-4.  Population Estimates, Aluminum. Extractable (ALEX11), Subregion 1C.
                                     199

-------
VARIAB
Xcl
Populal
Lake Ai
0.8-
0.6-
1-FOO
0.4-
0.2-
LE: EXT ALUM AS UG/L FOR CLEARWATER LAKES*.2000 HA 16 FEB 1986
t>U.U Xc2: 100.0 Xc3: 150.0 REGION 1
tion Size (N): 813 SE(N): 83.4 Sample Size: 83 SUB RGN D
-ea (A): 24798 SE(A): 3700 CLASS

l
\
\
i
\\
1 V
\ s




0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
Min: 0.00 QI: 1.00 Q2: 1.97 Q3: 3.87 Q4: 9.04 Max: 186.70
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
Median: 2.87 Pc1: 0.040 Nc1: 33 Ncu1: 67
Mean: 10.05 Pc2: 0.008 Nc2:7 Ncu2: 17
Std. Dev.: 22.78 Pc3: 0.008 Nc3:7 Ncu3: 17

    1.0
   0.8-
   0.6-
   0.4-
   0.2-
      0.0   10.0    20.0   30.0    40.0   50.0   60.0    70.0   80.0   90.0   100.0
Min:   0.00   QI: 0.98    Q2: 1.48    Q3:  2.41     Q4: 6.50     Max: 186.70
Median: 1.74
PROPORTIONS AND AREA ABOVE THE VALUE OF
Gc1: 0.044   Acl:  1079      Acul:  2614
Gc2: 0.002  Ac2:  40        Acu2: 101
Gc3: 0.002  Ac3:  40        Acu3: 101
Figure 9-5 .  Population Estimates, Aluminum, Extractable (ALEX11), Subregion ID.
                                      200

-------
 VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKES^2000 HA
    Xc1:  50.0    Xc2:  100.0     Xc3: 150.0
 Population Size (N): 835   SE(N):  64.8        Sample Size:  97
 Lake Area (A):  85955      SE(A): 18145
16 FEB 1986
    1.D
    0.8-
    0.6-
    0.4-
    0.2-
    O.D-
       0.0    10.0   20.0    30.0    40.0   50.0   60.0    70.0   80.0   90.0    100.0
 Min:  0.00   Qj: 0.84    Q2: 3.48    Q3:  6.37    Q4: 12.35    Max: 33.90
Min:
dian
an:
i De

0.8-
0.6-
r*fy\
*(X)
0.4-
0.2-
: 0
dian:
No
PROPORTIONS AND NUMBERS ABOVE THE VALUE Of
: 4.54 Pc1: 0.000 Nc1: 0 Ncu1: **
6.81 Pc2: 0.000 Nc2:0 Ncu2: **
v.: 6.73 Pc3: 0.000 Nc3:0 Ncu3: **

i
i
u
\
I V. _
3.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90
.00 QI: 1.17 Q2: 3.47 Q3: 5.83 Q4: 6.76 Max:
PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
4.39 Gcl: 0.000 Ac1: 0 Acu1: **
Gc2: 0.000 Ac2: 0 Acu2: **
t Defined Gc3: -000 Ac3:  Acu3: **



.0 10(
33.90




D.O

Figure 9-6 .  Population Estimates,  Aluminum, Extractable (ALEX11), Subregion 1E.
                                      201

-------
 VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKESs.2000 HA
    Xc1: 50.0    Xc2: 100.0    Xc3: 150.0
 Population Size (N): 3927  SE(N):  337.6      Sample Size:  278
 Lake Area (A):  312694    SE(A): 67216
                                                         16 FEB 1986
    1.D-
   o.o-J
       0.0   10.0    20.0   30.0   40.0    50.0   60.0   70.0    80.0   90.0   100.0
Min:  0.00   Q^  0.15     Q2:  2.00    Q3: 3.67     Q4: 8.52     Max: 213.00
Median:   3.00
Mean:     5.77
Std. Dev.: 9.61
PROPORTIONS AND NUMBERS ABOVE THE VALUE
Pcl: 0.005 Nc1: 19 Ncu1: 33
Pc2: 0.000 Nc2:2 Ncu2: 4
Pc3: 0.000 Nc3:2 Ncu3; 4
OFXC
    1.0-
   0.0
Min:
 o.o
0.00
10.0   20.0   30.0    40.0   50.0   60.0    70.0   80.0   90.0    100.0
 Qi: 0.41    Q2: 3.00   Q3:  3.32    Q4: 5.72     Max: 213.00
Median: 3.00
                     PROPORTIONS AND AREA ABOVE THE VALUE OF X,
         Gc1:  0.001    Ac1: 240
         Gc2:  0.000   A^: 94
         Gc3:  0.000   Ac3: 94
                                            Acu1: 380
                                            Acu2: 199
                                            Acu3: 199
Figure  9-7 . Population Estimates, Aluminum, Extractable (ALEX11), Region 2.
                                     202

-------
VARIAB
Xc1:
Populat
Lake Ar
0.8-
0.6-
0.4-
0.2-
LE: EXT ALUM AS UG/L FOR CLEARWATER LAKESs.2000 HA 16 FEB 1986
bU.U Xc2: 100.0 Xc3: 150.0 REGION 2
ion Size (N): 440 SE(N): 66.1 Sample Size: 39 SUB_RGN A
ea (A): 79692 SE(A): 34679 CLASS

\
i
L-


0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
Min: 0.00 QI: 0.36 Q2: 1.61 Q3: 2.24 Q4: 2.96 Max: 14.00
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
Median: 1.90 Pc1: 0.000 Ncl: 0 Ncul: **
Mean: 2.57 Pc2: 0.000 Nc2:0 Ncu2: **
Std. Dev.: 2.50 Pc3: 0.000 Nc3:0 Ncu3: **

0.8-
0.6-
0.4-
0.2-

\
\


0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0
din: 0.00 QI: 1.78 Q2: 2.22 Q3:2.51 Q4: 2.79 Max: 14.00
PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
Median: 2.36 Gc1: 0.000 Ac1: 0 Acu1: **
Gc2: 0.000 Ac2: 0 Acu2: **
** Not Defined Gc3: -000 Ac3:  Acu3: **
Figure  9-8 . Population Estimates, Aluminum, Extractable (ALEX11), Subregion 2A.
                                     203

-------
 VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKESs.2000 HA   16 FEB 1986
Xc1: 50.0 Xc2: 100.0 Xc3: 150.0
Population Size (N): 517 SE(N): 68.4
Lake Area (A): 12675 SE(A): 4921
Sample Size: 78
REGION 2
SUB_RGN B
CLASS

    0.0
       0.0    10.0   20.0    30.0   40.0   50.0    60.0    70.0   80.0    90.0   100.0
 Min:  0.00   QI: 0.41     Q2: 1.94     Q3:  3.90    Q4: 11.91     Max: 213.00
Min:
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
dian: 2.97 Pc1: 0.021 Nc1: 11 Ncu1: 17
an: 8.75 Pc2: 0.004 Nc2:2 Ncu2: 4
1 Dev.: 17.65 Pc3: 0.004 Nc3:2 Ncu3: 4

0.8-
0.6-
~/y\
j(X)
0.4-
0.2-

V
I ^
I
t
t
1
\
t
1 1
^^ ^y ~ ~ "" ~-x
^ 	 	 . ^i^ 	 	

0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90
: 0.00 QI: 1.62 Q2: 5.14 Q3: 5.42 Q4: 7.72 Max:
dian:
PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
5-28 Gc1: 0.015 Ac1: 196 Acul: 319
Gc2: 0.007 Ac2: 94 Acu2: 199
Gc3: 0.007 Ac5: 94 Acu3: 199


.0 100.0
213.00

Figure  9-9 .  Population Estimates, Aluminum, Extractable {ALEX11), Subregion 2B.
                                     204

-------
  VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKES^2000 HA
     Xc1: 50.0    Xc2: 100.0     Xc3: 150.0
  Population Size (N): 946   SE(N):  67.0        Sample Size: 99
  Lake Area (A): 83007     SE(A): 21390
    0.0
       0.0    10.0    20.0
 Min:  0.00   Q^  0.18
                          30.0   40.0    50.0   60.0    70.0   80.0   90.0   100.0
                         Q2: 2.00    Q3:  3.95     Q4: 8.63     Max: 75.00
 Median:   2.63
 Mean:    5.73
 Std. Dev.: 8.75
                     PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X
                    Pc1: 0.009  Nc1:  8      Ncu1:  21                 
                    Pc2: 0.000  Nc2:0      Ncu2:  **
                    Pc3: 0.000  Nc3:0      Ncu3:  ++
    1.0
    0.8
    0.6-
   0.4-
   0.2-
   0.0
      -    1-0    20.0   30.0   40.0    50.0   60.0
Min:  0.00   QI:  0.00    Q2:  1.17     Q3: 0.61    Q4: 3.59
Median:  0.10
** Not Defined
                                                             Max: 75.00
                    PROPORTIONS AND AREA ABOVE THE VALUE OF X
                    GC1:  0.001    AC1:  44        A:  112
                    Gc2:  0.000   Ac2:  0
                    Gc3:  0.000   Ac3:  0
                                                  CL|I:
                                                 Acu2:
                                                 Acu3:
                                                      **
Figure  9-10.  Population Estimates, Aluminum, Extractable (ALEX11). Subregion 2C.
                                    205

-------
VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKESs.2000 HA
   Xc1:  50.0    Xc2: 100.0    Xc3:  150.0
Population Size (N): 2024  SE(N):  316.9       Sample Size:  62
Lake Area (A):  137320    SE(A): 53232
   1.0-
                                                               16 FEB 1986
   0.8-
   0.6-
   0.4--
   0.2-
   0.0
Min:
      0.0   10.0    20.0   30.0   40.0    50.0    60.0    70.0    80.0   90.0   100.0
     0.00   Qj:  0.16     Q2: 1.46     Q3:  3.96    Q4: 8.17      Max:  30.00
Median:   3.25
Mean:     5.72
Std. Dev.:  7.62
PROPORTIONS AND NUMBERS ABOVE
Pc1: 0.000 Nc1: 0 Ncu1: **
Pc2: 0.000 Nc2:0 Ncu2: **
Pc3: 0.000 Nc3:0 Ncu3: **
THE VALUE OF Xc
Min:


0.8-




0.6-
Vy\
JW

0.4-


0.2-


\ ;
\
V.









^
V
\
V.
X
1
1
1
1
1
1
1
A i
V;
\!
\i
\i

















0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90
: 0.00 Qj: 3.05 Q2: 3.50 Q3: 3.95 Q4: 9.24 Max:

dian: 3.72

 Not Defined
PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
Gc1: 0.000 Ac1: 0 Acu1: **
Gc2: 0.000 A^: 0 Acu2: **
Gc3: 0.000 Ac3: 0 Acu3: **


































.0 100.0
30.00




Figure 9-11.  Population Estimates,  Aluminum, Extractable (ALEX11), Subregion 2D.
                                       206

-------
VARIAB
r*1
Populal
Lake Ai
0.8-
0.6-
1f~/\y\
0.4-
0.2-

LE: EXT ALUM AS UG/L FOR CLEARWATER LAKESs.2000 HA
50.0 Xc2: 100.0 Xc3: 150.0
tion Size (N): 115 SE(N): 15.5 Sample Size: 48
-ea (A): 18547 SE(A): 4133
I
I
i
H
1 \
\\
N^
16 FEB 1986
REGION 3
SUB_RGN A
CLASS





       0.0   10.0    20.0   30.0    40.0    50.0   60.0    70.0   80.0   90.0   100.0
 Min:  0.00   QI:  0.82     Q2: 2.00     Q3: 2.00    Q4: 2.48     Max: 8.00
 Median:   2.00
 Mean:     2.12
 Std. Dev.: 1.14
                     PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X,
Pc1:  0.000  Nc1: 0
Pc2:  0.000  Nc2:0
Pc3: 0.000  Nc3:0
Ncu1:
Ncu2:
NCu3-
                              **
    1.0-
   0.8-


   0.6-
1-G(X)

   0.4-


   0.2-
   0.0-
      0.0    10.0   20.0    30.0   40.0
Min:  0.00    Qi: 0.83    Q9: 2.00
                  50.0    60.0   70.0    80.0   90.0    100.0
                 3: 2.00    Q4: 2.20     Max: 8.00
Median:  2.00
 ** Not Defined
PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
Gc1:  0.000   Acl:  0         Acul:  **
Gc2:  0.000  Ac2:  0         Acu2: **
Gc3:  0.000  Ac3:  0         Acu3: ++
Figure  9-12.  Population Estimates, Aluminum. Extractable (ALEX11), Subregion 3A.
                                     207

-------
VARIABLE: EXT ALUM AS UG/L FOR CLEARWATER LAKESs.2000 HA
   Xcl:  50.0    Xc2:  100.0     Xc3: 150.0
Population Size (N): 922    SE(N):  142.0       Sample Size: 81
Lake Area (A):  36149      SE(A): 8574
                                          16 FEB 1986
   1.D
   0.8-
   0.6-
   0.4-
   0.2-
   O.D-
      0.0   10.0    20.0   30.0    40.0   50.0   60.0    70.0   80.0   90.0   100.0
Min:   0.00   Qj: 1.02    Q2: 0.05    Q3:  8.39    Q4: 18.61     Max: 446.00
Median:   4.47
Mean:     16.12
Std. Dev.:  36.31
 PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X(
Pc1: 0.074  Nc1:  69      Ncu1: 114
Pc2: 0.044  Nc2:40      Ncu2: 76
Pc3: 0.015  Nc3:14      Ncu3: 35
   1.0-
   O.B-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0   10.0   20.0    30.0    40.0   50.0    60.0    70.0   80.0    90.0   100.0
Min:  0.00    Qj: 3.07    Q2: 4.00    03:  11.10    Q4: 26.84    Max: 446.00
Median:  7.33
                     PROPORTIONS AND AREA ABOVE THE VALUE OF X,
 Gc1:  0.127    Acl: 4600
 Gc2:  0.064   Ac2: 2324
      0.003   A: 103
Acu1:  8752
Acu2: 5657
Acu3: 229
Figure  9-13.  Population Estimates, Aluminum, Extractable (ALEX11), Subregion 3B.
                                    208

-------
 VARIABLE: TOTAL ALUM AS UG/L FOR LAKES s.2000 HA

 Population Size (N): 7096   SE(N):  165.3        Sample Size:  763
 Lake Area (A):  427864     SE(A): 36414
16 FEB 1986
    1.0'
    0.8
    0.6-
    0.4-
    0.2-
    0.0'
       0.0    20.0    40.0    60.0    80.0   100.0   120.0   140.0   160.0   180.0   200.0
 Min:  0.00    Qj: 23.88   Q2: 40.02    Q3: 62.84   Q4: 111.65    Max:  796.80


 Median:   49.93
 Mean:    79.62
 Std. Dev.: 93.27
    1.0-
   0.8-


   0.6-
  G(X)

   0.4-


   0.2-
   0.0-
       0.0   20.0   40.0   80.0   80.0    100.0   120.0   140.0   160.0   180.0   200.0
Min:   0.00   QI: 21.77   Q2:  38.73   Q3:  57.29   Q4:  91.35     Max: 796.80

Median: 47.95
Figure 9-14. Population Estimates, Aluminum, Total (ALTL11), Region 1.
                                      209

-------
VARIABLE: TOTAL ALUM AS \JG/L FOR LAKES s.2000 HA

Population Size (N): 8501   SE(N):  315.5       Sample Size:  587
Lake Area (A):  501457     SE(A):  73306
16 FEB 1986
    1.0-
   0.8-
   0.8-
   0.4-
   0.2-
   0.0-
       0.0   20.0   40.0   80.0   80.0   100.0   120.0   140.0   160.0   180.0   200.0
Min:  0.00   Q^ 9.07     Q2: 17.58    Qj: 30.85    Q4: 61.73     Max: 805.00


Median:   22.88
Mean:     45.12
Std. Dev.: 64.17
    1.0-
   0.8-
   0.8-
   0.4-
   0.2-
   0.0-
       0.0   20.0    40.0    60.0   80.0   100.0   120.0   140.0   160.0   180.0  200.0
Min:   0.00   Qj:  7.72    02:  10.20   Qj: 21.45     Q4: 33.04    Max: 805.00


Median: 15.70
Figure 9-15. Population Estimates, Aluminum, Total (ALTL11), Region 2.
                                    210

-------
VARIABLE: TOTAL ALUM AS UG/L  FOR LAKES s.2000 HA
                    16 FEB 1986
Population Size (N): 258    SE(N):  20.5
Lake Area (A):  24272      SE(A): 4795
Sample Size:  94
   1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0'
       0.0   20.0    40.0    60.0    80.0    100.0   120.0    140.0    160.0   180.0   200.0
Min:   8.00   Q^  39.02   Q2: 61.91    Q3:  136.70  Q4:  185.59   Max: 1090.00
Median:   81.69
Mean:     129.64
Std. Oev.: 133.45
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0   20.0    40.0    60.0    80.0    100.0   120.0   140.0    160.0   180.0   200.0
Min:   8.00   Q^  39.80   Q2: 60.57   Q3:  136.32  04:  140.31   Max: 1090.00
Median: 118.00
Figure 9-16. Population Estimates, Aluminum, Total (ALTL11), Subregion 3A.
                                     211

-------
VARIABLE: TOTAL ALUM AS UG/L  FOR LAKES s.2000 HA

Population Size (N): 2098  SE(N):  212.6        Sample Size:  148
Lake Area (A):  66169      SE(A): 10158
   1.0-
   0.8-
   0.8-
   0.4-
   0.2-
   0.0'
16 FEB 1986
       0.0   20.0    40.0    60.0    80.0    100.0   120.0   140.0   160.0   180.0  200.0
Min:   8.00   Qj:  22.93   Q2: 36.32   Q3:  60.25    Q4: 130.58   Max: 1357.40
Median:   44.37
Mean:     108.54
Std. Oev.: 216.58
    1.0'
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
      0.0   20.0    40.0    60.0    80.0    100.0   120.0   140.0   160.0   180.0  200.0
Min:   8.00   Q^  28.14   Q2: 35.92   Q3:  60.34   Q4: 95.28    Max: 1357.40


Median: 44.81
Figure 9-17.  Population Estimates, Aluminum, Total (ALTL11), Subregion 3B.
                                     212

-------
VARIABLE: ANC AS UEQ/L FOR LAKES^.2000 HA
   Xcl:  0.0     Xc2: 50.0     Xc3:  200.0
Population Size (N): 7096  SE(N):  165.3       Sample Size: 763
Lake Area (A):  427864    SE(A): 36414
                                                               16 FEB 1986
   i.o-
   0.8-
   0.6-
F(X)
   0.4
   0.2-
   0.0
      -100.0 0.0
Min:  -45.60 /-Q
                 100.0  200.0  300.0  400.0   500.0  600.0  700.0  800.0  900.0  1000.0
                51.63    Q2:  118.36   Qy  199.64  Q4: 399.94   Max: 4046.60
Median:   158.11
Mean:     286.08
Std. Dev.:  411.69
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF Xc
                    Pcl: 0.046   Ncl: 326     Ncu1:  422
                    Pc2: 0.192   Nc2:1364    Ncu2:  1536
                    Pc3: 0.600   Nc3: 4258    Ncu3:  4513
   1.0-
   0.6-


   0.6-
G(X)

   0.4--


   0.2-
   0.0
      -100.0 0.0
Min:  -45.60  Q^


Median: 131.94
                 100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0 1000.0
                68.21    Q2:  113.61    Q3: 172.01   Q4: 349.45   Max: 4046.60
PROPORTIONS
Gc-j: 0.018
Gc2: 0.102
Gc3: 0.672
AND
A..
^*1 *
AC3-
AREA BELOW THE
7756 Acul:
43839 Acu2
287422 Acu5
VALUE OF
11567
56963
: 338943
*c
Figure 9-18.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Region 1.
                                     213

-------
VARIABLE: ANC AS UEQ/L FOR LAKES^.2000 HA
   Xc1: 0.0     Xc2: 50.0      Xc3: 200.0
                                       16 FEB 1986
Population Size (N): 1290
Lake Area (A):  118776
SE(N):  47.6
SE(A):  22186
Sample Size:  155
    1.0-
   0.8-
   0.6-
F(X)
   0.4--
   0.2^
   0.0-
      -100.0 0.0    100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
Min:  -34.20  Qj: 14.04   Q2:  67.67    Q3: 145.94   Q4: 250.78   Max:  3226.80
Median:   111.78
Mean:     222.61
Std. Dev.: 408.47
PROPORTIONS AND NUMBERS BELOW THE VALUE
PC1: 0.107 NC1: 138 Ncu1: 190
Pc2: 0.356 Nc2:459 Ncu2: 541
Pc3: 0.705 Nc3: 909 Ncu3: 995
OFXC
   1.0-
   0.8-
   0.6-
000
   0.+-
   0.2-
   0.0-
      -100.0 0.0   100.0   200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
Min: -34.20  0^  54.22    Q2:  83.38   Q3: 152.57   Q4: 308,11   Max:  3226.80
Median: 87.16
PROPORTIONS
Gcl: 0.017
Gc2: 0.122
Gc3: 0.737
AND
Ac2:
AREA BELOW THE
2056 Acul:
14504 Acu2
87572 Acu3
VALUE OF Xc
3078
21856
: 121699
Rgure 9-19.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Subregion 1A.
                                    214

-------
VARIABLE: ANC AS UEQA FOR LAKESi.2000 HA
   Xc1: 0.0     Xc2: 50.0      Xe3: 200.0
                          SE(N):  92.9
                          SE(A):  2913
                                                                 16 FEB 1986
Population Size (N): 1479
Lake Area (A):  26872
                                             Sample Size:  143
    1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0

Min: -
      -100.0 0.0    100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
      32.90  Qj: 102.16    Q2:  200.99  Q3:  373.58   Q4: 530.45   Max:  2187.00
Median:   297.39
Mean:     389.55
Std. Dev.: 400.38
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pcl: 0.053 Nc1: 78 Ncu1: 141
Pc2: 0.131 Nc2:194 Ncu2: 281
Pc3: 0.387 Nc3:572 Ncu3: 719
OFXC
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
                              _ i
                              *^
      -100.0 0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0 1000.0
Min: -32.90  Qj:  44.76   Q2:  189.26   Q3:  298.61  Q4: 419.78    Max: 2187.00
Median: 196.87
PROPORTIONS
Gc1: 0.109
Gc2: 0.213
Gc3: 0.508
AND
AC1:
Ac3:
AREA BELOW THE
2937 Acu1:
5719 Acu2
13647 Acu3
VALUE OF Xc
5888
8923
: 18060
Figure 9-20.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Subregion 1B.
                                     215

-------
VARIABLE: ANC AS UEQ/L FOR LAKES^.2000 HA
                               Xc3:  200.0
                                                            16 FEB 1986
Xc1:  0.0     Xc2: 50.0
Population Size (N):  1483
Lake Area (A):  72412
   1.0
                      SE(N): 57.5
                      SE(A): 12013
                       Sample Size: 163
   o.s-i
   0.6-
F(X)
   0.4--
   0.2-
   0.0
      -100.0 0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
Min: -31.00  Qj:  52.05    Q2: 94.20   Q3:  146.20   Q4: 387.74    Max:  4046.60
Median:   119.88
Mean:     323.69
Std. Dev.:  557.05
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.024 NC1: 35 Ncul: 63
Pc2: 0.177 Nc2:262 Ncu2: 334
Pc3: 0.676 Nc3:1002 Ncu3: 1100
OFXC
   1.0-


   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
      -100.0 0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
Min:  -31.00  Qj:  84.14    Q2: 95.86   Q3:  128.15    Q^.: 363.31    Max:  4046.60
Median: 112.94
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gcl:  0.016   Ac1:  1152       Acul:  2664
Gc2:  0.090   Ac2:  6501   ./  Acu2: 9294
                              Acu3: 72587
                        0.090
                        0.744
                                        6501
                                        53894
Figure 9-21.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Subregion 1C.
                                     216

-------
VARIABLE: ANC AS UEQ/L FOR LAKES*.2000 HA
   Xcl:  0.0      Xc2: 50.0      Xc3: 200.0
Population Size (N): 1318   SE(N):  93.7        Sample Size:  126
Lake Area (A):  36403     SE(A): 4381
                                         16 FEB 1986
   ' -100.0 0.0   100.0  200.0  300.0   +00.0  500.0  600.0  700.0  800.0  900.0  1000.0
 Min: -27.80  Qj:  39.44   Q2: 126.96  Q3:  212.01   Q4: 402.63   Max: 2109.00
 Median:   161.79
 Mean:    276.55
 Std. Dev.: 368.90
PROPORTIONS AND NUMBERS BELOW THE VALUE OF
Pcl: 0.050 Nc1: 66 Ncu1: 107
Pc2: 0.216 Nc2:284 Ncu2: 368
Pc3: 0.573 Nc3: 755 Ncu3: 882
xc
    1.0-


    0.8-


    0.6-
 G(X)

    0.+ -


    0.2
    o.o       ,,,,..
      -100.0 0.0   100.0  200.0  300.0  +00.0  500.0  600.0  700.0  800.0 900.0 1000.0
 Min: -27.80  Qj: 76.68   Q2: 140.47  Q3:  190.37   Q4: 375.90   Max:  2109.00
 Median:  165.39
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gc1: 0.042    Ac1: 1516      Acul:  3084
Gc2: 0.156    Ac2: 5686      Acu2:  8319
Gc3: 0.625    Ac3: 22763    Acu3:  28688
 Figure 9-22.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Subregion 1D.
                                    217

-------
 VARIABLE: ANC AS UEQ/L  FOR LAKESs.2000 HA
    Xc1:  0.0     Xc2: 50.0      Xc3:  200.0
 Population Size (N): 1526  SE(N): 66.0       Sample Size: 176
 Lake Area (A):  173400    SE(A): 25725
                                              16 FEB 1986
   0.0
     -100.0 0.0
Min: -45.60  Q
 100.0
72.13
                       200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0 1000.0
                         Q2:  119.01    Q3: 177.59   Q4: 298.36    Max:  1540.90
 Median:   148.36
 Mean:     211.12
 Std. Dev.: 227.54
    PROPORTIONS AND NUMBERS BELOW THE VALUE OF Xc
    PC1: 0.005  Ncl: 8       Ncu1: 21
    Pc2: 0.108   Nc2:165     Ncu2: 220
    Pc3: 0.668   Nc3:1020    Ncu3: 1121
    1.0
   0.8-


   0.6-

GOO

   0.4-


   0.2-
   0.0-
     -100.0  0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
Min: -45.60  QI: 78.53   Q2: 121.42   Q3:  193.78  04.: 343.04   Max: 1540.90
Median:  143.95
    PROPORTIONS AND AREA BELOW THE VALUE OF Xc
    Gc1:  0.001    Acl: 95        Acu1:  242
    Gc2:  0.066   Ac2: 11428      Acu2:  21083
    Gc3:  0.632   Ac3: 109546    Acu3:  142497
Rgure  9-23.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Subregion 1E,
                                    218

-------
VARIABLE: ANC AS UEQ/L FOR LAKES*.2000 HA
   Xc1:  0.0     Xc2: 50.0      Xc3: 200.0
Population Size (N): 8501   SE(N):  315.5       Sample Size:  587
Lake Area (A):  501457     SE(A): 73306
                                                              16 FEB 1986
   1.0-
   0.8-
   0.8-
F(X)
   0.4-
   0.2-
   0.0
     -100.0 0.0
Min: -48.60  Q
                 100.0  200.0  300.0  400.0  500.0  800.0  700.0  800.0  900.0  1000.0
                77.82    Q2:  183.94   Q3: 642.97   Q4: 1415.51    Max:  4002.00
Median:   359.54
Mean:     755.98
Std. Oev.:  881.14
PROPORTIONS AND NUMBERS BELOW THE VALUE OF Xc
Pel-
Pc2'
Pc3-
0
0
0
.017
.154
.414
NC1:
Nc2:
Nc3 =
148
1312
3518
Ncu1:
NO*'
Ncu3-
209
1605
3982
   1.0-
   0.8-
   0.6-
G(X)
   0.4-
   0.0-
     -100.0  0.0   100.0  200.a  300.0  400.0  900.0  600.0  700.0  800.0  900.0 1000.0
Min: -48.60  Q^ 265.36  Q2: 592.95   Q3: 936.58  Q^.: 1860.05  Max:  4002.00
Median: 680.68
                     PROPORTIONS AND AREA BELOW THE VALUE OF X,
                     Gc1:  0.003   Ac1: 1513
                     Gc2:  0.033   A^: 16737
                     Gc3:  0.152    Ac3: 76374
Acu1:  2191
Acu2: 20609
Acu3: 88914
Figure 9-24.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Region 2.
                                    219

-------
VARIABLE: ANC AS UEQ/L FOR LAKESs.2000 HA
   XM:  0.0      Xc2: 50.0      X.-<: 200.0
                                                               16 FEB 1986
Population Size (N): 1457   SE(N): 74.3
Lake Area (A):  142979     SE(A): 37582
                                           Sample Size:  147
    1.0
    0.8-
    0.6-
 F(X)
    0.2-
    0.0'
      -100.0 0.0   100.0  200.0  300.0 400.0  500.0  600.0  700.0  800.0  900.0  1000.0
 Min:  34.00  Qv-  98.16    Q2:  156.21   Q3: 208.88   Q4: 403.37    Max:  2401.70
 Median:   184.88
 Mean:     289.34
 Std. Dev.: 308.41
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF X,
Pc1: 0.000
Pc2: 0.042
P: 0.570
                                Nc1: 0
                                Nc2:61
Ncu1:  **
Ncu2:  100
      938
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
     -100.0  0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  300.0  900.0  1000.0
Min:  34.00  Qj: 164.04" Q2: 266.19  Qj:  276.94  Q4: 351.97   Max: 2401.70
Median:  270.13
 ** Not Defined
                    PROPORTIONS AND AREA BELOW THE VALUE OF Xc
                    Gc1:  0.000    Acl: 0         Acu1:  **
                    Gc2:  0.005   A^: 705      Acu2:  1101
                         0.233   AC3: 33277    ACU3:  41006
Figure  9-25.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Subregion 2A
                                   220

-------
VARIABLE: ANC AS UEQ/L FOR LAKES*.2000 HA
   Xc1:  0.0     Xc2: 50.0     Xc3:  200.0
                                          16 FEB 1986
Population Size (N):  1050  SE(N):  72.5
Lake Area (A):  34025     SE(A):  10854
                       Sample Size:  146
   1.0-
   0.8-
   0.6-
F(X)
   0.4"
   0.2-
   o.o-
     -100.0  0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  IOOO.O
Min: -48.60  Qj: 55.54    Q2:  163.89  Q3: 806.67  Q4: 1284.41   Max: 2726.00
Median:    283.59
Wean:     669.07
Std. Dev.:  703.48
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.098 Nc1: 102 Ncu1: 157
Pc2: 0.189 Nc2:198 Ncu2: 265
Pc3: 0.4-17 Nc3: 438 Ncu3: 535
OFXC
   1.0
   0.8-
   0.6-
G(X)
   0.4--
   0.2-1
   0.0-
     -100.0 0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  300.0  900.0  1000.0
Win: -48.60  Qj: 214.56   Q2: 961.83   Q3: 1197.33  Q4: 1520.65   Max:  2726.00
Median: 978.83
PROPORTIONS AND AREA BELOW THE VALUE OF X<
Gcl:  0.024    Ac1:  829       Acu1:  1267
Gc2:  0.062    Ac2:  2099      Acu2: 2836
Gc3:  0.172    Ac3:  5842      Acu3: 7292
Rgure  9-26.  Population Estimates, Acid Neutralizing Capacity (ALKA11). Subregion 2B.
                                    221

-------
VARIABLE: ANC AS UEQ/L FOR LAKESs.2000 HA
   Xcl: 0.0     Xc2: 50.0      Xc3:  200.0
                                                              16 FEB 1986
Population Size (N): 1480
Lake Area (A):  97556
                         SE(N):  48.8
                         SE(A):  21357
Sample Size:  153
    1.0-
   0.8-
   o.e-
F(X)
   O.4.-
   0.2-
   0.0'
      -100.0  0.0
Min: -31.30   Q
                 100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
                 15.77    Q2:  42.34   Q3:  292.44  Q4: 600.73   Max: 1168.20
Median:   93.88
Mean:     288.07
Std. Oev.: 333.68
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.031 Nc1: 45 Ncul: 73
Pc2: 0.414 . Nc2:612 Ncu2: 705
Pc3: 0.567 Nc3:839 Ncu3: 936
OFXC
   0.0
     -100.0  0.0   100.0  200.0  JOO.O  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
Min: -31.30   Q^ 261.48  Q2:  599.66  Q3: 623.70   Q4: 783.87   Max:  1168.20
Median: 614.08
                     PROPORTIONS AND AREA BELOW THE VALUE OF X,
                    Gcl:  0.007
                    Gc2:  0.094
                    Gc3:  0.145
Ac1: 6G4
A^: 9167
Ac3: 14171
      Acul:  1202
      Acu2:  11216
      Acu3:  16904
Figure 9-27.  Population Estimates, Acid Neutralizing Capacity (ALKA11), Subregion 20.
                                   222

-------
VARIABLE: ANC AS UEQ/L FOR LAKES*.2000 HA
                               Xc3: 200.0
                         SE(N): 293.9
                         SE(A): 58202
                                                                16 FEB 1986
   Xc1: 0.0     Xc2: 50.0
Population Size (N): 4515
Lake Area (A):   226896
   1.0-
                                            Sample Size: 141
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   o.o-
      -100.0 0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
Min:   6.00   Qj:  103.97  Q2: 4-39.00  Q3: 1139.82  Q4: 2021.89   Max:  4002.00
Median:   801.69
Mean:     1080.17
Std. Dev.:  1015.32
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.000 Ncl: 0 Ncul: **
Pc2: 0.098 Nc2:441 Ncu2: 708
Pc3: 0.313 Nc3:1411 Ncu3: 1841
OFXC
   1.0
   0.8i
G(X)
   0.2-
   0.0'
      -100.0 0.0   100.0  200.0   300.0  400.0  500.0   600.0  700.0  300.0  900.0 1000.0
Min:   6.00    Q^ 779.67   Q2: 1121.94   03: 1892.82  0^.: 2344.85  Max: 4002.00
Median:  1717.38
 ** Not Defined
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gel'
Gc2:
Gc3'
0
0
0
.000
.021
.102
Ad'
Ac2:
Ac3:
0
4766
23083
Acu1:
Acu2:
Acu3:
**
7943
32461
Figure 9-28.  Population Estimates, Acid Neutralizing Capacity (ALKA11). Subregion 2D.
                                     223

-------
VARIABLE: ANC AS UEQ/t FOR LAKESi.2000 HA
   Xcl:  0.0     Xc2: 50.0      Xc3: 200.0
Population Size (N): 258   SE(N): 20.5        Sample Size: 94
Lake Area (A):  24272     SE(A): 4795
                                                              16 FEB 1986
   1.0-
   0,8-
   0.6-
F(X)
   0>
   0.2
   o.o ,.,.....
     -100.0  0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  600.0  900.0  1000.0
Min:  20.20  Q,: 149.15   Q2: 225.74  Q3:  265.80  Q4: 421.36   Max: 1863.55
Median:   250.24
Mean:     303.36
Std. Oev.:  216.83
   1.0-
   0.8-


   0.6-
G(X)

   0.4


   0.2
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF X,
                    Pc1: 0.000  Nc1: 0
                    Pc2: -01*  Nc2:3
                    Pc3: 0.343  Nc3:89
Ncu1: **
Ncu2:5
Ncu3:108
   0.0
      -100.0 0.0   tOO.O  200.0  300.0  400.0  SOO.O  600.0  700.0  600.0  900.0  1000.0
Min:   20.20  Oj: 113.16   Q2: 151.44   Q3:  258.09  04.: 316.83   Max: 1863.55
Median: 185.45
  **  Not Defined
                     PROPORTIONS AND AREA BELOW THE VALUE OF Xc
                     Gc1:  0.000    Ac1:  0         Acul:  
                     Cc2:  0.003   A^:  79        Acu2: 108
                     Gc3:  0.546   Ac3:  13258     Acu3: 16436
Figure 9-29. Population Estimates, Acid Neutralizing Capacity (ALKA11), Subregion 3A.
                                   224

-------
 VARIABLE: ANC AS UEQA FOR LAKES*.2000 HA
                                                      16 FEB 1986
    Xc1:  0.0     Xc2: 50.0
 Population Size (N): 2098
 Lake Area (A):  66169
     Xc3: 200.0
SE(N):  212.6
SE(A):  10158
                                  Sample Size: 148
    1.0
    0.8
    o.e
 F(X)
    0.4
    0.2-
    0.0-
      -100.0 0.0   100.0  200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
 Min: -209.12 Qv 7.48    Q2: 68.56   Q3:  275.05   Q4: 713.05   Max: 3639.76
 Median:
 Mean:
 Std. Dev.:
83.51
535.18
871.42
 PROPORTIONS AND NUMBERS BELOW THE VALUE OF X,
Pc1: 0.220  Ncl: 463
Pc2: 0.353  Nc2:742
Pc3: 0.551  Nc3:
                   Ncu1: 615
                   Ncu2: 942
                   Ncu3: 1413
    i.o


   0.6


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
      -100.0 0.0   100.0
Min: -209.12 0^-2.06
Median: 72.21
             200.0  300.0  400.0  500.0  600.0  700.0  800.0  900.0  1000.0
              Q2: 46.72    Q3: 142.97   Q4: 473.83   Max: 3639.76
PROPORTIONS
Gc1: 0.202
Gc2: 0.435
Gc3: 0.641
AND
Acl:
Ac2:
Ac3:
AREA BELOW THE
13348 Acu1:
28778 Acu2
42434 Acu3
VALUE OF Xc
18790
41420
: 55674
Rgure 9-30.  Population Estimates. Acid Neutralizing Capacity (AUCA11). Subregion 3B.
                                     225

-------
VARIABLE: AMMONIUM AS UEQ/L FOR LAKES i.2000 HA

Population Size (N): 7096   SE(N):  165.3        Sample Size:  763
Lake Area (A):  427864    SE(A): 36414
16 FEB 1986
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0'
       0.0    2.0     4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:   0.00   Qj: 0.93    Q2:  1.21      03:  1.70      Q4: 3.76      Max: 54.89


Median:   1.42
Mean:     3.47
Std. Dev.: 6.10
   1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0    2.0     4.0    8.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:  0.00   Q^ 0.88    Q2: 1.14      Qj:  1.46     Q^: 2.38     Max:  54.89

Median:  1.33
Figure 9-31.  Population Estimates, Ammonium (NH418), Region 1.
                                     226

-------
 VARIABLE: AMMONIUM AS UEQ/L FOR LAKES s.2000 HA

 Population Size (N): 8501  SE(N):  315.5        Sample Size: 587
 Lake Area (A):  501457     SE(A): 73306
          16 FEB 1986
                           6-0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
   0.0
      0.0    2.0     4.0
Min:  0.00    QI:  0.00    Q2: 1.07     Q3: 2.74
                /

Median:   1.65
Mean:    3.77
Std Dev.: 5.49
: 5.53
                                                                Max: 46.01
   0.8-
   0.6-
   0.4-
   0.2^
      -    2.0    4.0    6.0     8.0     10.0    12.0    14.0    16.0    18.0    20.0
Min:  0.00   QI:  0.00    02: 0.51    Q3:  0.55     Q<.:  3.29      Max: 46.01

Median:  0.53
Figure  9-31  Population Estimates,  Ammonium (NH418). Region 2.
                                    227

-------
 VARIABLE: AMMONIUM AS UEQ/L FOR LAKES ^2000 HA

 Population Size (N): 258    SE(N):  20.5        Sample Size: 94
 Lake Area (A):  24272      SE(A):  4795
                                                                  16 FEB 1986
    1.0
    0.8-
    0.6-
    0.4-
    0.2-
    0.0'
       0-0    2.0     4.0     6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
 Min:  0.00   QI: 0.51     Q2: 1.21      Q3:  3.89     Q4:  11.01     Max: 47.46


 Median:   2.22
 Mean:     5.80
 Std. Oev.: 8.42
    1.0
   0.8
   0.6-
   0.4-
   0.2-
   0.0-
      0.0    2.0     4.0     6.0     8.0
Min:  0.00   QI:  1.06     Q2:  3.25


Median:  4.64
                                        10.0     12.0    14.0     16.0     18.0    20.0
                                         :  4.87     Q4: 7.33     Max: 47.46
Figure  9-33.  Population Estimates, Ammonium (NH416), Subregion 3A.
                                      228

-------
VARIABLE: AMMONIUM AS UEQ/L FOR LAKES s.2000 HA

Population Size (N): 2098  SE(N):  212.6        Sample Size:  148
Lake Area (A):  66169      SE(A): 10158
16 FEB 1986
   1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0'
      0.0    2.0     4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:   0.05   Q^ 0.78    Q2:  1.12     Qj:  2.04    Q4:  5.01^     Max: 90.37


Median:    1.41
Mean:     4.06
Std. Dev.: 9.30
   i.o-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0    2.0     4.0    6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:   0.05   Qj:  0.65    02: 0.83     03:  1.69     Q^.: 4.42      Max: 90.37


Median:  1.03
Figure 9-34.  Population Estimates, Ammonium (NH416), Subregion 38.
                                      229

-------
VARIABLE: LAKE AREA IN HA FOR LAKES i2000 HA

Population Size (N): 7096  SE(N):  165.3       Sample Size: 763
Lake Area (A):  4-27864     SE(A): 36414
16 FEB 1986
   o.o
       0.0   100.0   200.0  300.0  400.0   500.0   600.0   700.0   SOO.O   900.0  1000.0
Min:   3.70   C^: 7.97    Q2:  12.83    Q3: 23.02    Q4: 62.75    Max: 1763.30


Median:   16.71
Mean:     60.30
Std. Dev.: 151.03
    1.0'
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
      0.0   100.0  200.0  300.0   400.0   500.0   800.0   700.0  800.0  900.0  1000.0
Min:   3.70    0^ 49.27    Q2: 128.64  Q^:  333.48  Q4: 875.56   Max: 1768.30


Median:  244.99
Figure 9-35.  Population Estimates, Area, Lake (LAKE_SIZ). Region I
                                     230

-------
VARIABLE: LAKE AREA IN HA FOR LAKES s.2000 HA

Population Size (N): 8501   SE(N):  315.5       Sample Size: 587
Lake Area (A):  501457     SE(A): 73306
16 FEB 1986
   1.0
   0.8-
   0.6-
F(X)
   0.2
   0.0
      0.0   100.0   200.0  300.0  400.0   500.0   600.0   700.0   800.0   900.0   1000.0
Min:   3.80   Q^ 7.55     Q2:  11.61     Q^:  19.05    Q4: 46.07    Max:  1824.50


Median:    14.80
Mean:     58.99
Std. Dev.: 149.50
   i.o-
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
      0.0   100.0  200.0  300.0  400.0   500.0   600.0   700.0   800.0   900.0  1000.0
Min:  3.80   Q^ 46.03   Q2: 163.62   03: 395.78   Q4: 505.14   Max: 1824.50


Median:  279.03
Figure 9-36.  Population Estimates, Area, Lake (LAKE_SIZ), Region 2.
                                     231

-------
VARIABLE: LAKE AREA IN HA FOR LAKES s.2000 HA

Population Size (N): 258    SE(N):  20.5        Sample Size: 94
Lake Area (A):  24272      SE(A): 4795
   1.0-
   0.8-
   0.8-
F(X)
   0.4-
   0.2 J
   0.0
16 FEB 1986
       0.0   100.0   200.0   300.0   400.0  500.0  600.0  700.0   800.0   900.0   1000.0
Min:   2.80   Qj: 5.18      Q2:  9.38    Qy  21.14    Q4: 64.28    Max:  1649.00
Median:   10.80
Mean:     94.16
Std. Dev.: 238.25
    1.0-
   O.S-i
   0.6i
GOO
   0.4H
   0.2-
   0.0'

       0.0   100.0   200.0   300.0   400.0  500.0  600.0  700.0   800.0   900.0   1000.0
Min:   2.80   Q^ 129.99   Q2:  580.19   03:  778.41   Q4: 1086.82 Max:  1649.00


Median: 621.91
Figure 9-37.  Population Estimates, Area, Lake (LAKE_S!Z), Subregion 3A.
                                    232

-------
 VARIABLE: LAKE AREA IN HA FOR LAKES s.2000 HA

 Population Size (N):  2098  SE(N): 212.6       Sample Size: 148
 Lake Area (A):  66169      SE(A):  10158
16 FEB 1986
    1.0
    0.8-
   0.8-
 F(X)
    0.4-
    0.2-
   0.0-
       0.0   100.0   200.0   300.0   400.0   500.0   600.0   700.0   800.0   900.0   1000.0
Min:  4.00   Q}: 6.45     Q2: 12.51    Qj: 19.50    Q4: 44.13    Max:  1398.90


Median:   17.28
Mean:    31.53
Std. Dev.: 62.14
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
       0.0   100.0   200.0   300.0   400.0   500.0   600.0   700.0  800.0  900.0  1000.0
Min:  4.00   QJ: 19.49     02:  46.20   Qj:  81.87    Q4: 155.85    Max: 1398.90


Median: 65.62
Figure 9-38.  Population Estimates,  Area, Lake (LAKE_SIZ), Subregion 3B.
                                      233

-------
VARIABLE: CALCIUM AS UEQA F0R LAKES*.2000 HA
   Xcl:  50.0    Xc2: 100.0     Xc3: 150.0
Population Size (N): 7096  SE(N):  165.3       Sample Size:  763
Lake Area (A):  427864     SE(A): 36414
                                                              16 FEB 1986
   1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   o.o
      0.0   100.0   200.0   300.0  400.0   500.0   600.0   700.0  800.0   900.0  1000.0
Min:  19.26  Q^ 89.89    Q2:  140.63   Q3: 231.84   Q4: 383.35  Max:  3028.43
Median:    177.44
Mean:     283.96
Std. Oev.:  319.12
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.051 Nc1: 359 Ncu1: 442
Pc2: 0.246 NC2J1745 Ncu2: 1922
Pc3: 0.423 Nc3: 2999 Ncu3: 3215
OFXC
   1.0-


   0.6-


   0.8-
G(X)

   0.4-


   0.2-
   0.0-             .       .       .       .
      0.0  100.0   200.0   300.0  400.0  SOO.O   600.0   700.0  800.0  900.0  1000.0
Min:   19.26   Q^ 94.46    Q2:  134.46   03: 200.82  Q4: 319.21    Max:  3028.43
Median: 164.32
                     PROPORTIONS AND AREA BELOW THE VALUE OF Xc
                     Gc1:  0.014    Ac1:  5970      Acul:  8520
                     Gc2:  0.242   A^:  103528    Acu2: 132690
                          0.480   AC3: 205572    Acu3: 254066
Figure 9-39. Population Estimates. Calcium (CA16), Region 1.
                                    234

-------
 VARIABLE: CALCIUM AS UEQ/L FOR LAKES*.2000 HA
    Xc1: 50.0    Xc2: 100.0     Xc3:  150.0
 Population Size (N): 1290  SE(N): 47.6        Sample Size: 155
 Lake Area (A):  118776     SE(A): 22186
                                                         16 FEB 1986
    1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
Mm:
 0.0   100.0   200.0  300.0   400.0   500.0  600.0  700.0   800.0   900.0  1000.0
24.15   Qv- 76.68   Q2: 126.05  Q3:  180.98  Q4: 277.66   Max: 3028.43
Median:   144.53
Mean:     247.03
Std. Dev.: 329.97
Pcl: 0.083
Pc2: 0.307
Pc3: 0.511
                           Nc1: 108
                           Nc2:396
                           Nc3:659
N
           154
 Icu1:
Ncu2-
Ncu3: 748
    1.0
   0.8-


   0.6-
000
   0.4-


   0.2-
   0.0-
      0.0  100.0   200.0   300.0  400.0   500.0   600.0  700.0   800.0   900.0  1000.0
Min:  24.15   (ty 107.23   Q2:  142.39  Q3:  200.37  Q^: 336.89  Max:  3028.43
Median:  143.13
                     PROPORTIONS AND AREA BELOW THE VALUE OF
               Gcl:  0.014
               Gc2:  0.190
               Gc3:  0.512
                                    c1:
1618
22522
60784
     Acu1:  2579
     Acu2:  39266
     ACU3:  93486
Rgure  9-40. Population Estimates, Calcium (CA16). Subregion 1A.
                                   235

-------
VARIABLE: CALCIUM AS UEQ/L FOR LAKESs.2000 HA
                                          16 FEB 1986
   Xcl: 50.0    Xc2: 100.0     Xc3: 150.0
Population Size (N): 1479
Lake Area (A):  26872
    SE(N): 92.9
    SE(A): 2913
Sample Size:  143
    i.o-
   0.81
   0.6-
F(X)
   0.4-
   0.2-
   0.0'
       0.0   100.0  200.0  300.0   400.0   500.0  600.0  700.0   800.0   900.0  1000.0
Min:  38.92  Qj: 161.16   Q2: 273.93  Q3:  337.48  Q4: 505.60   Max: 1383.23
Median:   291.37
Mean:     393.99
Std. Dev.: 316.42
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.004 Nc1: 6 Ncu1: 11
Pc2: 0.077 Nc2:114 Ncu2: 178
Pc3: 0.177 Nc3:262 Ncu3: 359
OFXC
    1.0
   0.8i
G(X)
   0.4-
   0.2-
   0.0-
      0.0   100.0   200.0   300.0   400.0  500.0   600.0   700.0   800.0  900.0  1000.0
Min:  38.92   Qj:  115.90   Q2: 214.30   Q3: 296.29   Q4: 445.68   Max: 1383.23
Median: 268.01
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gcl:  0.003   Acl:  93        Acu1:   154
     0.131   A^: '3515      Acu2:  6458
     0.287   Ac3:  7716      Acu3:  11292
Figure 9-41.  Population Estimates. Calcium (CA16), Subregion 1B.
                                     236

-------
VARIABLE: CALCIUM AS UEQ/L FOR LAKESs.2000 HA
   Xc1:  50.0    Xc2: 100.0    Xc3:  150.0
Population Size (N): 1483   SE(N):  57.5       Sample Size: 163
Lake Area (A):  72412      SE(A): 12013
                                                                16 FEB 1986
       0.0   100.0   200.0   300.0  400.0   500.0   600.0   700.0  800.0  900.0   1000.0
 Min:  22.25  Qt: 89.86   Q2:  119.16    Q3: 171.69    Q4: 403.59   Max:  2526.94
 Median:   136.80
 Mean:    308.75
 Std. Dev.: 419.54
                    PROPORTIONS AND NUMBERS BELOW THE VALUE OF X(
                    Pcl:  0.042   NC1: 63      Ncul: 100
                    Pc2:  0.272   Nc2:404    Ncu2: 487
                    Pc3:  0.537   Nc3:797    Ncu3: 894
    1.0
   0.8
   0.6-
G(X)
   0.4-
   Q-2-
   0.0-
      0.0   100.0   200.0   300.0   400.0  500.0  600.0   700.0   800.0   900.0  1000.0
Min:  22.25   QI: 94.42    Q2:  110.19   Q3:  166.35   Q4: 417.48    Max: 2526.94
Median: 134.23
PROPORTIONS AND AREA BELOW THE VALUE OF Xr
Gcl: 0.021
Gc2: 0.318
Gc3: 0.543
Ac1: 1534
A^: 23056
Ac3: 39344
Acu1: 3225 -
Acu2: 39516
Acu3: 56408
Figure  9-42.  Population Estimates, Calcium (CA16), Subregion 1C.
                                    237

-------
VARIABLE: CALCIUM AS UEQ/L FOR LAKESs.2000 HA
   Xc1:  50.0    Xc2: 100.0     Xc3: 150.0
Population Size (N): 1318   SE(N):  93.7        Sample Size: 126
Lake Area (A):  36403     SE(A): 4381
                                                               16 FEB 1986
    1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
       0.0   100.0  200.0   300.0   400.0   500.0  600.0  700.0   800.0   900.0  1000.0
Min:  31.99   Qj:  82,50   Q2: 152.51   Q3:  239.12   Q4: 378.89   Max: 1463.57
Median:   186.79
Mean:     257.91
Std. Dev.:  241.29
PROPORTIONS AND NUMBERS BELOW THE
Pc1: 0.101 NC1: 133 Ncul: 183
Pc2: 0.252 Nc2:332 Ncu2: 418
Pc3: 0.393 Nc3:518 Ncu3: 625
VALUE OF Xc
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
Min:  31

Median:  205.05
        0   100.0   200.0
        99   Q: 91.62
                        300.0  400.0   500.0   600.0  700.0  800.0   900.0  1000.0
                        Q2: 163.48  Q3:  235.37  Q4: 303.47  Max:  1463.57
                     PROPORTIONS AND AREA BELOW THE VALUE OF X
0.059
0.205
0.354
                                    c1:
      2164
Ac2:  7460
Ac3:  12882
                                                   cu1:
      3763
ACL)2: 10366
Acu3: 16548
Rgure  9-43.  Population Estimates, Calcium (CA16), Subregion 1D.
                                    238

-------
 VARIABLE: CALCIUM AS UEQ/L FOR LAKES-SL2000 HA
    Xcl:  50.0     Xc2: 100.0     Xc3:  150.0
 Population Size (N): 1526  SE(N): 66.0        Sample Size: 176
 Lake Area (A):  173400    SE(A): 25725
                                           16 FEB 1986
    1.0
    0.8-
    0.6-
 F(X)
    0.4-1
    0.2-^
    0.0-
       0.0   100.0  200.0   300.0   400.0  500.0   600.0   700.0  800.0   900.0  1000.0
 Min:  19.26   QI: 86.69   Q2:  121.31    Q3: 173.32   Q4: 278.06   Max:  1500.99
 Median:   147.19
 Mean:     206.94
 Std. Dev.: 207.67
 PROPORTIONS AND NUMBERS BELOW THE VALUE OF X(
Pcl: 0.032  Ncl: 49     Ncul: 79
Pc2: 0.327  Nc2:500    Ncu2: 581
Pc3: 0.500  Nc3:763    Ncu3: 856
   o.o
      0.0   100.0   200.0  300.0   400.0   500.0  600.0   700.0  800.0  900.0   1000.0
Min:  19.26  QI: 89.01   Q2: 132.56  Q3:  184.95   Q4: 317.23    Max:  1500.99
Median:  160.84
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gcl: 0.003   Acl:  561       Acul:  956
Gc2: 0.271   Ac2:  46975     Acu2: 63768
Gc3: 0.489   Ac3:  84847     Acu3: 115907
Figure  9-44.  Population Estimates,  Calcium (CA16), Subregion 1E
                                   239

-------
VARIABLE: CALCIUM AS UEQ/L FOR LAKES^2000 HA
   Xc1:  50.0    Xc2: 100.0     Xc3:  150.0
Population Size (N): 8501  SE(N): 315.5      Sample Size:  587
Lake Area (A):  501457    SE(A): 73306
                                          16 FEB 1986
   1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
      0.0   100.0   200.0  300.0   400.0   500.0  600.0   700.0  800.0  900.0   1000.0
Min:  12.97  QI: 81.92   Q2: 153.47   Q3:  414.87   Q4: 937.40   Max:  2770.00
Median:  238.17
Mean:    502.37
Std. Dev.: 552.03
 PROPORTIONS AND NUMBERS BELOW THE VALUE OF Xc
Pc1: 0.091  Ncl: 776    Ncu1:  997
Pc2: 0.270  Nc2:2296   Ncu2: 2688
   ;: 0.399  Nc3:3391   Ncu3: 3853
   1.0-
   0.8-
   0.6-
G(X)
   0.4i
   0.2-
   0.0

      0.0   100.0   200.0 . 300.0   400.0  500.0  600.0   700.0  800.0  900.0  1000.0
Min:  12.97  Qt: 216.97  Q2: 364.16  03:  688.40  Q*: 1167.98   Max:  2770.00
Median: 458.56
 PROPORTIONS AND AREA BELOW THE VALUE OF Xc
 Gcl:  0.020 -   Ac1: 9902      Acu1:  13284
 Gc2:  0.068   Ac2: 34247      Acu2:  40567
      0.146    A: 73074     A:  85553
Figure 9-45.  Population Estimates,  Calcium (CA18), Region 2.
                                    240

-------
VARIABLE: CALCIUM AS UEQA FOR LAKES*.2000 HA
   Xc1:  50.0    Xc2: 100.0     Xc3: 150.0
Population Size (N): 1457   SE(N): 74.3        Sample Size:  147
Lake Area (A):  142979     SE(A): 37582
                                          16 FEB 1986
   vo
      0.0   100.0   200.0   300.0  400.0   500.0   600.0   700.0  800.0  900.0   1000.0
Min:  48.90   Q}: 98.03   Q2:  129.61   Q3: 172.18    Q4: 329.89   Max:  1690.11
Median:   143.35
Mean:     226.47
Std. Oev.:  217.92
PROPORTIONS AND NUMBERS BELOW THE VALUE OF
Pc1: 0.019 Ncl: 28 Ncul: 60
P&: 0.207 Nc2:301 Ncu2: 382
Pc3: 0.531 Nc3: 773 Ncu3: 882
xc
   1.0-
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
      0.0   100.0   200.0   300.0  400.0   500.0   800.0  700.0  800.0   900.0   1000.0
Min:  48.90   Qj: 138.84   Q2:  230.18   Q3: 232.25   Q4: 260.72   Max:  1690.11
Median: 230.73
                     PROPORTIONS AND AREA BELOW THE VALUE OF X,
Gtf 0.002   Acl:  234
Gc2: 0.053   Ac2:  7635
Gc3: 0.223   Ac3:  31857
Acul:  495
Acu2: 10693
Acu3: 39587
Figure 9-46. Population Estimates, Calcium (CA16), Subregion 2A.
                                    241

-------
 VARIABLE: CALCIUM AS UEQ/L FOR LAKES*.2000 HA
    Xcl: 50.0    Xc2: 100.0     Xc3: 150.0
 Population Size (N): 1050   SE(N): 72.5        Sample Size:
 Lake Area (A):  34025      SE(A): 10854
       16 FEB 1986
146
     1.0
    0.8
    0.6
 F(X)
    0.4-
    0.2-
    0.0-
       0.0   100.0  200.0  300.0   4-00.0   500.0   600.0   700.0  800.0  900.0  1000.0
 Min:  12.97   QI:  84.36   Q2: 182.50  Q3:  516.22   Q4: 967.52   Max: 1826.34
 Median:    246.31
 Mean:     492.15
 Std. Dev.:  458.96
PROPORTIONS AND NUMBERS BELOW
Pc1: 0.160 Ncl: 168 Ncu1: 235
Pc2: 0.235 Nc2:247 Ncu2: 319
Pc3: 0.345 Nc3:362 Ncu3: 449
THE VALUE OF Xc
       0.0   100.0   200.0   300.0  400.0  500.0   600.0   700.0   800.0   900.0  1000.0
Min:   12.97   QI: 187.34  Q2: 687.53   Q3: 897.83  Q4: 1091.22   Max: 1826.34
Median: 704.35
PROPORTIONS AND AREA BELOW THE VALUE OF Xr
^
Gcl:
GC2:
Gc3'
0.044
0.081
0.125
Ac1:
Ac2:
Ac3:
1496
2770
4249
Acu1:
Acu2:

2177
3597
5301
Figure 9-47. Population Estimates, Calcium (CA16), Subregion 2B.
                                    242

-------
VARIABLE: CALCIUM AS UEQ/L  FOR LAKES^.2000 HA
                                      16 FEB 1986
   Xc1:  50.0    Xc2: 100.0     Xc3: 150.0
Population Size (N): 1480
Lake Area (A):  97556
SE(N):  48.8
SE(A):  21357
Sample Size:  153
   1.0
   o.o
       0.0   100.0   200.0   300.0  400.0  500.0  600.0   700.0   800.0   900.0   1000.0
Min:  17.46   Qj: 48.48    Q2: 74.23    03:  206.68  Q4: 394.21   Max: 794.41
Median:   101.12
Mean:     215.69
Std. Dev.: 206.74
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.219 Nc1: 324 Ncu1: 400
Pc2: 0.490 Nc2:726 Ncu2: 818
PC3: 0.563 Nc3: 833 Ncu3: 930
OFXC
    1.0-


   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
       0.0   100.0   200.0   300.0   400.0  300.0  600.0  700.0   800.0   900.0   1000.0
 Min:  17.46   Q^ 230.47   Q2:  363.02  Q3:  394.76  Q4: 536.19   Max:  794.41
 Median: 364.32
PROPORTIONS
Gc1: 0.047
Gc2: 0.110
Gc3: 0.142
AND
Ad:
Ac3:
AREA BELOW THE
4608 Acul:
10750 Acu2
13819 Acu3
VALUE OF Xc
6211
12798
: 16451
 Figure  9-48.  Population Estimates,  Calcium (CA16), Subregion 2C.
                                      243

-------
  VARIABLE: CALCIUM AS UEQ/L FOR LAKES
-------
VARIABLE: CALCIUM AS UEQ/L FOR LAKES*.2000 HA
   Xc1:  50.0     Xc2: 100.0     Xc3: 150.0
Population Size (N): 258    SE(N):  20.5        Sample Size:  94
Lake Area (A):  24272      SE(A): 4795
           16 FEB 1986
   1.0-
   0.8-
FOO
   0.4-
   0.2-
   0.0
      0.0   100.0   200.0   300.0  400.0  500.0   600.0   700.0  800.0  900.0  1000.0
Min:  16.47   Q^ 68.56    Q2:  90.26    Q3: 130.23   Q4: 252.62   Max:  1545.40
Median:   104.69
Mean:     156.32
Std. Dev.:  158.64
PROPORTIONS AND NUMBERS BELOW
Pcl: 0.120 Ncl: 31 Ncul: 42
Pc2: 0.442 Nc2:114 Ncu2: 138
Pc3: 0.620 Nc3:160 Ncu3: 188
THE VALUE OF Xc
      0.0   100.0   200.0   300.0  400.0  500.0   600.0   700.0  800.0  900.0  1000.0
Min:   16.47   Q^ 49.88    Q2:  77.50    Q3:  111.36    Q4: 133.41    Max:  1545.40
Median: 110.86
                     PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gcl: 0.203
Gc2: 0.467
     0.844
Acl: 4927
Ac2: 11330
     20474
cu1:
     6858
                                                  Acu2: 14216
                                                  Acu3: 28265
Figure 9-50.  Population Estimates. Calcium (CA16), Subregion 3A.
                                    245

-------
VARIABLE: CALCIUM AS UEQ/L FOR LAKESs.2000 HA
   Xcl:  50.0    Xc2: 100.0     Xc3: 150.0
Population Size (N): 2098  SE(N): 212.6       Sample Size:  148
Lake Area (A):  66169      SE(A): 10158
                                                                16 FEB 1986
     1.0
    0.8
    0.8
 F(X)
    0.4-
    0.2-
    0.0'
 Min:
      0.0   100.0  200.0  300.0   400.0   500.0   600.0  700.0   800.0   9o'o.O  1000.0
     9.33   QI: 54.19    Q2: 171.74   Q3:  282.86  Q4: 852.86   Max:  3040.91
 Median:   238.32
 Mean:    532.67
 Std. Dev.: 743.82
PROPORTIONS AND NUMBERS BELOW
Pcl: 0.192 Ncl: 402 Ncu1: 551
Pc2: 0.268 Nc2:563 Ncu2: 731
Pc3: 0.344 Nc3:722 Ncu3: 923
THE VALUE OF Xc
    1.0
   0.6
   0.6-
G(X)
   0.4-
   0.2-
   0.0-
Min:
     0.0   100.0   200.0  300.0  400.0   500.0   600.0  700^0  800.0  900.0   1000.0
    9.33   QI: 54.11    Q2: 180.02  Q3:  267.92  04.: 486.50   Max:  3040.91
Median: 246.77
                   PROPORTIONS AND AREA BELOW THE VALUE OF Xc
                   Gcl:  0.186   -Acl: 12289     Acu1:  17763
                   Gc2:  0.273    Ac2: 18059     Acu2: 24864
                         0.320    Ac3: 21202     Acu3: 28586
Figure 9-51.  Population Estimates,  Calcium (CA16), Subregion 3B.
                                    246

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VARIABLE: CHLORIDE AS UEQ/L FOR LAKES ^2000 HA
                    16 FEB 1986
Population Size (N): 7096  SE(N): 165.3
Lake Area (A):  427864    SE(A): 36414
Sample Size:  763
   1.0
    '
       0.0    50.0   100.0   150.0  200.0  250.0  300.0  350.0   400.0   450.0   500.0
 Min:  4.25   Qj: 12.13     Q2:  40.08   Qj:  104.35  Q4: 293.58  Max:  2501.32
 Median:   59.60
 Mean:    205.75
 Std. Dev.: 349.22
    1.0
    o.o
        0.0   50.0    100.0   150.0   200.0   250.0   300.0   350.0   400.0   450.0  500.0
 Min:   4.25    Q^  12.13    Q2: 29.76   Q3:  65.94    Q4: 122.42    Max: 2501.32
 Median: 43.10
 Figure 9-52.  Population Estimates, Chloride (CL16), Region 1.
                                      247

-------
  VARIABLE: CHLORIDE AS UEQ/L FOR LAKES s.2000 HA

  Population Size (N): 8501  SE(N): 315.5       Sample Size:  587
  Lake Area (A):  501457    SE(A): 73306
16 FEB 1986
     i.o
     0.8
     0.6
     0.4
    0.2
    0.0-
        0.0   50.0    100.0   150.0  200.0  250.0  300.0   350.0   400.0   450.0   500.0
 Min:   1.13    QI:  7.61     Q2:  12.06    Q3:  20.34   Q4: 65.76    Max:  1006.70
 Median:   16.84
 Mean:     49.13
 Std. Oev.:  93.70
   o.o .      .       ,       t     __i	r^^^^..^^..^.i,
       0.0   50.0   100.0   150.0   200.0  250^0300^035o"o400.0   450.0   500.0
Min:   1.13    0^8.95    Q2:  17.40    Q3:  37.52    Q4: 77.01    Max:  1006.70

Median: 21.92
Rgure 9-53.  Population Estimates, Chloride (CL16), Region 2.
                                    248

-------
VARIABLE: CHLORIDE AS UEQ/L FOR LAKES s.2000 HA

Population Size (N): 258    SE(N):  20.5        Sample Size: 94
Lake Area (A):  24272      SE(A):  4795
16 FEB 1986
   1.0-
   0.8-
   0.6-
   0.4-
   0.2
   0.0
       0.0   50.0   100.0   150.0   200.0   250.0   300.0  350.0   400.0   450.0   50C.O
Min:   15.51   Qj: 28.67    Q2: 59.68    Q^: 76.15    Q4: 94.94    Max:  2671.49


Median:   65.74
Mean:    99.33
Std.  Dev.: 214.82
    1.0-
   0.8-
   0.6-
   0.4
   0.2-
   0.0'
       0.0    50.0   100.0   150.0   200.0  250.0  300.0  350.0   400.0  450.0   500.0
Min:   15.51   Q^ 23.47    Q2: 32.44    Qj:  57.94   Q4: 104.67    Max: 2671.49


Median: 41.89
Figure  9-54.  Population Estimates. Chloride (CL16), Subregion 3A.
                                     249

-------
 VARIABLE: CHLORIDE AS UEQ/L FOR LAKES s.2000 HA

 Population Size (N): 2098  SE(N): 212.6        Sample Size:  148
 Lake Area (A):  66169     SE(A): 10158
16 FEB 1986
    1.0-
    0.8-
    0.6-
    0.4-
    0.2-
    0.0
                                                     V	_	
       0.0    50.0   100.0  -150.0   200.0   250.0   300.0   350.0   400.0   450.0   500.0
 Min:  49.93  Q^ 134.74   Q2: 181.02  Q3: 296.43  Q4: 537.31   Max:  1125.58


 Median:   222.31
 Mean:    313.45
 Std. Dev.: 232.35
    1.0
   0.8-
   0.6H
   0.4-
   0.2-
   0.0
      0.0   50.0    100.0   150.0  200.0   250.0   300.0   350.0   400.0  450.0  500.0
Min:  49.93   QI:  150.32  Q2:  270.26  Q3:-  372.64   Q4: 471.30    Max: 1125.58


Median:  324.79
Figure 9-55. Population Estimates. Chloride (CL16), Subregion 3B.
                                       250

-------
VARIABLE: COLOR IN PCU FOR LAKES s.2000 HA
                    16 FEB 1986
Population Size (N): 7096  SE(N):  165.3
Lake Area (A):  427864    SE(A): 36414
Sample Size: 763
   1.0
   0.0
       0.0   20.0    40.0    60.0    80.0    100.0   120.0   140.0   160.0   180.0  200.0
Min:   0.00   Q^  13.13    Q2: 19.30    Qy  28.81   Q4: 43.72    Max: 250.00
Median:   23.94
Mean:     32.35
Std. Dev.: 26.99
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0   20.0   40.0    60.0    80.0    100.0   120.0   140.0   160.0   180.0  200.0
Min:  0.00   Qj: 12.75    Q2: 18.11    03:  27.70   Q4: 42.60    Max: 250.00
Median: 19.58
Figure  9-56.  Population Estimates, Color, True (COLVAL), Region I
                                      251

-------
 VARIABLE: COLOR IN PCU FOR LAKES *2000 HA
                    16 FEB 1986
 Population Size (N): 8501   SE(N): 315.5
 Lake Area (A):  501457     SE(A): 73306
Sample Size:  587
       0.0   20.0    40.0    60.0   80.0   100.0   120.0   140.0    160.0   180.0   200 0
    0.0
 Min:  4.00    QI:  14.83    Q2: 24.99   Q3:  44.90   Q4: 75.58     Max:  345.00
 Median:    34.68
 Mean:     48.41
 Std. Dev.:  39.05
   o.o
       0.0   20.0    40.0    60.0    80.0   100.0   120.0   140.0   160.0   180.0  200.0
Min:   4.00   QI:  11.90    Q2: 19.75   Q3:  29.16    Q4: 62.88    Max: 345.00


Median: 24.52
Figure 9-57.  Population Estimates, Color, True (COLVAL), Region 2.
                                    252

-------
VARIABLE: COLOR IN PCU FOR LAKES *2000 HA
                    16 FEB 1986
Population Size (N): 258    SE(N):  20.5
Lake Area (A):  24272      SE(A): 4795
Sample Size: 94
   1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0   20.0    40.0    60.0    80.0   100.0    120.0   140.0   160.0   180.0   200.0
Min:   15.00   Qj:  20.71    Q2: 27.42    Qy 40.23   Q4: 59.28    Max:  175.00
Median:   35.46
Mean:     44.66
Std. Dev.: 28.17
   o.o
      0.0   20.0    40.0    60.0    80.0   100.0   120.0   140.0   160.0   180.0   200.0
Min:  15.00   Q^  32.65   Q2: 17.47     03: 22.63    Q4: 40.37    Max:  175.00
Median: 19.25
Figure 9-58.  Population Estimates, Color, True (COLVAL), Subregion 3A.
                                     253

-------
 VARIABLE: COLOR IN PCU FOR LAKES i.2000 HA
                    16 FEB 1986
 Population Size (N):  2098  SE(N): 212.6
 Lake Area (A):  66169      SE(A): 10158
Sample Size:  148
    1.0-
    0.8-
    0.6-
    0.4-
    0.2-
   0.0-
       0.0    20.0    40.0    80.0    80.0   100.0   120.0   140.0   160.0   180.0   200.0
Min:  5.00   Q^ 14.48    Q2: 26.52   Qj: 46.07    Q4: 92.89    Max: 300.00
Median:   36.72
Mean:     58.85
Std. Dev.: 61.54
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0   20.0 M  40.0    80.0   80.0    100.0   120.0   140.0    160.0   180.0   200.0
Min:  5.00   Cty  12.84   Q2:  21.22    03:  38.14   Q^: 64.76    Max: 300.00


Median: 27.93
Figure 9-69.  Population Estimates. Color, True (COLVAL). Subregion 3B.
                                     254

-------
 VARIABLE: COND. AS US/CM FOR LAKES s.2000 HA

 Population Size (N): 7096  SE(N):  165.3       Sample Size: 763
 Lake Area (A):  427864    SE(A):  36414
16 FEB 1986
    o.o
       0.0   30.0   60.0   90.0    120.0   150.0  180.0   210.0   240.0   270.0   300.0
 Min:  11.00   Qj: 25.30   Q2: 35.80   Q^:  53.00   Q4: 95.41     Max: 453.50


 Median:   43.32
 Mean:    69.46
 Std. Dev.: 68.13
    1.0
   0.8-
   0.6-
G(X)
   0.4-
   0.2-
   0.0-
      0.0   30.0    60.0    90.0   120.0   150.0   180.0   210.0  240.0   270.0   300.0
Min:   11.00   QI:  25.24    Q2: 31.33   Q3:  40.88    Q4: 64.46    Max:  453.50

Median:  35.65
Rgure 9-80.  Population Estimates, Conductance (COND11), Region t
                                     255

-------
VARIABLE: COND. AS US/CM FOR LAKES 1.2000 HA
Population Size (N): 8501   SE(N):  315.5
Lake Area (A):  501457     SE(A): 73306
Sample Size: 587
    1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0
                    16 FEB 1986
       0.0   30.0   *0.0    90.0    120.0   150.0   180.0   210.0  240.0   270.0   300.0
Min:   7.80   Qj: 20.69   02: 33.45   Qy  73.41    Q4: 142.84   Max: 494.00
Median:   44.27
Mean:     84.89
Std. Dev.: 84.27
    i.o
   0.8-


   0.6-
G(X)

   0.4


   0.2
   0.0
      0.0   30.0    60.0    90.0    120.0   150.0   180.0   210.0   240.0   270.0   300.0
Min:  7.80    0,:  38.76   Q2: 64.88    Qj:  106.74   Q4: 192.87   Max: 494.00


Median:  80.45
Figure 9-61  Population Estimates.  Conductance (CONOID, Region 1
                                      256

-------
 VARIABLE: CONO. AS US/CM FOR LAKES *2000 HA

 Population Size (N): 258   SE(N):  20.5        Sample Size:  94
 Lake Area (A):  24272      SE(A):  4795
                                                                 16 FEB 1986
    1.0-
    0.8-
   0.6-
F(X)
    0.4 -
    0.2-
   0.0'
       0.0    30.0   60.0   90.0   120.0   150.0   160.0   210.0   240.0   270.0   300.0
Min:  7.80   Qj: 20.93   Q2:  34.25   Qj:  43.02    04: 63.92    Max: 475.20


Median:   38.47
Mean:    50.17
Std. Oev.: 48.78
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0
       0.0   30.0   60.0
Min:   7.80   Ot: 16.20

Median: 29.07
                          90.0    120.0    150.0   180.0   210.0   240.0   270.0   300.0
                          : 24.04    Q3:  39.03   Q4: 69.72    Max:  475.20
Figure 9*62.  Population Estimates. Conductance (COND11), Subregion 3A.
                                     257

-------
  VARIABLE: COND. AS US/CM FOR LAKES *2000 HA

  Population Size (N):  2098  SE(N):  212.6        Sample Size: 148
  Lake Area (A):  66169      SE(A):  10158
16 FEB 1986
    0.0
        0.0   30.0    60.0    90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
 Min:   10.90   Q,:  37.15    Q2: 73.42   Q3:  119.20   Q4: 197.63   Max:  543.00


 Median:   90.83
 Mean:     123.64
 Std. Dev.:  107.30
   o.o
       0.0   30.0    60.0    90.0   120.0   130.0   180.0  210.0   24ol   27o"o^000
Min:   10.90   0,:  38.47   Q2: 81.04   Q3:  106.79  Q4: 166.71    Max: 543.00

Median: 88.72
Figure 9-63. Population Estimates, Conductance (COND11), Subregion 3B.
                                     258

-------
VARIABLE: SITE DEPTH IN M FOR LAKES 1.2000 HA
                    16 FEB 1986
Population Size (N): 7096  SE(N):  165.3
Lake Area (A):  427864     SE(A):  36414
Sample Size: 763
   1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-<
   0.0-
       0.0    2.0     4.0     6.0     8.0     10.0    12.0     14.0     16.0     18.0   20.0
Min:   0.50   Q^ 1.59     Q2: 2.98    Qj:  5.44     Q4: 8.31     Max:  38.10
Median:   4.23
Mean:     5.73
Std. Dev.: 5.38
   o.o
       0.0    2.0     4.0     6.0     8.0     10.0    12.0     14.0     16.0     18.0    20.0
Min:  0.50   Qj: 3.18     Q2: 6.02    Qj:  10.09    Q4: 14.27     Max:  38.10


Median: 7.42
Figure 9-64.  Population Estimate!, Depth, Site (SITDPM), Region 1.
                                     259

-------
VARIABLE: SITE DEPTH IN M FOR LAKES i.2000 HA

Population Size (N): 8501  SE(N): 315.5       Sample Size: 587
Lake Area (A):  501457     SE(A): 73306
16 FEB 1986
   1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0
       0.0    2.0     4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20,0
Min:   0.90   Qj: 2.19     Q2: 4.61     Q$:  6.54    Q4: 10.91     Max: 36.90


Median:   5.62
Mean:     6.82
Std. Dev.: 5.16
   1.0-
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
       0.0    2.0     4.0     6.0     8.0     10.0    12.0    14.0    16.0    18.0    20.0
Min:   0.90   Q^ 4.25     Q2: 6.33     Q3:  11.37    Q4: 18.47     Max: 36.90


Median: 8.64
Figure 9-65.  Population Estimates, Depth, Site (SITDPM), Region 2.
                                       260

-------
VARIABLE: SITE DEPTH IN M FOR LAKES s.2000 HA
                         16 FEB 1986
Population Size (N):  258   SE(N):  20.5
Lake Area (A):  24272      SE(A): 4795
     Sample Size: 94
    1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
       0.0    2.0     4.0     6.0     8.0    10.0     12.0     14.0    16.0    18.0    20.0
Mini   1.50    Qj: 2.28     Q2: 4.03    Q3:  5.97     Q4: 12.51     Max:  119.00
Median:   4.76
Mean:     8.94
Std. Dev.: 12.28
    1.0
   o.s-
   0.6-
G(X)
   0.4-
   0.2-
   0.0-
       0.0    2.0     4.0
Min:   1.50    Qi: 10.16
                           6.0     8.0
10.0    12.0    14.0
 :  28-41     Q4:  3
                                                               16.0    18.0    20.0
Median: 15.11
Figure 9-66.  Population Estimates, Depth, Site (SITDPM), Subregion 3A.
                                        261

-------
 VARIABLE: SITE DEPTH IN M FOR LAKES 1.2000 HA

 Population Size (N):  2098  SE(N): 212.6        Sample Size:  148
 Lake Area (A):  66169      SE(A): 10158
     1.0
    0.8
    0.6
 F(X)
    0.4-
    0.2-
    0.0-
16 FEB 1986
       -    2.0     4.0     6.0     8.0     10.0    12.0    14.0    16.0    18.0    20.0
 Min:  0.90   QI: 1.48    Q2: 2.23    Q3:  3.49     Q4: 5.22      Max: 14.60
 Median:   2.69
 Mean:     3.73
 Std. Dev.:  2.69
    i.o
    0.8
    0.6-
G(X)
    0.4-
   0.2-
   0.0'
       -    2.0     4^0     6.0     8.0    10.0    12.0    14.0     16.0    18.0    20.0
Min:  0.90   QI: 1.74      Q2: 3.40     Q3:  4.63    Q4:  7.66      Max:  14.60


Median: 3.68
Figure 9-67.  Population Estimate!, Dapth, Site (SITDPM), Subregion 3B.
                                        262

-------
 VARIABLE: DIG AS MG/L FOR LAKES ^2000 HA

 Population Size (N):  7096  SE(N): 165.3
 Lake Area (A): 427864    SE(A): 36414
                    16 FEB 1986
Sample Size:  763
    o.o
       0.0    2.0     4.0     6.0     8.0     10.0    12.0     14.0     16.0    18.0    20.0
 Min:  0.20   C^: 0.94     Q2: 1-59     Q3: 2.68     Q4: 5.00     Max: 48.99


 Median:   2.09
 Mean:    3.68
 Std. Dev.: 4.82
    1.0
   0.8-
   0.6-
G(X)
   0.4-
   0.2-
   0.0-
       0.0    2.0     4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:   0.20   Q^ 1.01     Q2:  1.32     Q3:  2.10      Q4:  3.83     Max: 48.99


Median: 1.72
Figure 9-68.  Population Estimates,  Dissolved Inorganic Carbon (DICVAL), Region 1.

                                        263

-------
VARIABLE: DIG AS MG/L  FOR LAKES 
-------
VARIABLE: DIG AS MG/L FOR LAKES s.2000 HA

Population Size (N): 258   SE(N): 20.5        Sample Size:  94
Lake Area (A):  24272      SE(A): 4795
16 FEB 1986
    1.D-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0
       0.0    2.0     4.0     6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:  0.80   Q-): 2.28     Q2: 3.20     Q3:  4.10     Q4:  5.32     Max: 22.14


Median:   3.69
Mean:     4.20
Std. Dev.: 2.61
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0
       0.0    2.0     4.0     6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:  0.80   Q-|: 1.90     Q2: 2.39     03:  4.05    Q4: 4.56      Max: 22.14


Median: 2.74
Figure 9-70.  Population Estimates, Dissolved Inorganic Carbon (DICVAL), Subregion 3A.

                                        265

-------
  VARIABLE: DIG AS MG/L FOR LAKES 
-------
VARIABLE: DOC AS MG/L FOR LAKES*.2000 HA
   Xcl: 2.0     Xc2: 3.0      Xc3: 6.0
Population Size (N): 7096  SE(N):  165.3       Sample Size:  763
Lake Area (A):  427864    SE(A): 36414
                                                             16 FEB 1986
   o.o
      0.0
Min:  0.14
            2.0    4.0
            Qj:  2.82
      6.0    8.0    10.0    12.0    14.0    16.0    18.0   20.0
    Q2: 3.78    03:  5.01    Q4: 6.64     Max: 26.38
Median:
Mean:
Std. Dev.:
   i.o-
   0.8-


   0.6-
GOO

   0.4-


   0.2-
         4.30
         4.95
         2.81
                    PROPORTIONS AND NUMBERS BELOW THE VALUE OF X(
Pc1: 0.081
Pc2: 0.247
Pc3: 0.736
Nc1: 572
Nc2:1753
Nc3:5223
Ncu1:  696
Ncu2: 1966
Ncu3: 5508
   0.0'
      0.0
Min:  0.14


Median:  3.93
            2.0     4.0    6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
            QI: 2.68    Q2: 3.64    Q3:  4.53     Q4: 6.51      Max: 26.38
                    PROPORTIONS AND AREA BELOW THE VALUE OF Xc
                    Gcl:  0.076    Ac1:  32327     Acu1:  47392
                    Gc2:  0.304   A^:  130163    Acu2: 166530
                    Gc3:  0.756    Ac3: 323301    Acu3: 375893
Rgure 9-72.  Population Estimates, Dissolved Organic Carbon (DOC11), Region 1.

-------
VARIABLE: DOC AS MG/L FOR LAKES^.2000 HA
   Xc1: 2.0     Xc2: 3.0      Xc3:  6.0
Population Size (N>: 1290  SE(N):  47.6       Sample Size: 155
Lake Area (A): 118776     SE(A):  22186
                                           16 FEB 1986
   1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
      0.0    2.0    4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:  0.67    Qj:  2.77     Q2: 3.77    Q3:  4.68     Q4: 5.80     Max: 15.14
Median:   4.15
Mean:     4.42
Std. Dev.:  2.05
 PROPORTIONS AND NUMBERS BELOW THE VALUE OF X{
Pc1: 0.074   Nc1: 95      Ncu1: 139
Pc2: 0.244   Nc2:315     Ncu2: 388
Pc3: 0.851   Nc3:1098    Ncu3: 1186
Min:
Median:  3.90
      6.0    8.0    10.0    12.0     14.0    16.0    18.0    20.
     Q2:  3.77     Q3:  3.93     Q4: 5.13      Max: 15.14
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
GcV
Gc2:
GC3-
0.063
0.280
0.962
Ad-"
Ac2:
Ac3:
7518
33220
114283
Acu1:
Acu2:
Acu3:
14564
49030
150892
Figure 9-73.  Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 1A.
                                    268

-------
 VARIABLE: DOC AS MG/L FOR LAKESs.2000 HA
                                                          16 FEB 1986
         2.0
           X
                  c2:
3.0
 Population Size (N): 1479
 Lake Area (A):  26872
     Xc3: 6.0
SE(N):  92.9
SE(A): 2913
                                      Sample Size: 143
    1.D
    0.8
    0.6-
 F(X)
    0.4-
    0.2-
    0.0-
       0.0    2.0     4.0    6.0     8.0    10.0    12.0    14.0     16.0    18.0    20.0
 Min:  0.24   QI: 2.90    Q2: 3.55    Q3:  4.29     Q4: 5.97     Max: 20.03
Median:   3.84
Mean:     4.47
Std. Dev.: 2.23
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF X,
               Pcl: 0.055  Ncl: 81
               Pc2: 0.247  Nc2:366
               Pc3: 0.814  Nc3:1205
                       N
                    'cu1:
143
                       Ncu2: 500
                       Ncu3: 1376
    1.0
   0.8-
   0.6-
G(X)
   0.4-
   0.2-
   0.0
Min:
 0-0    2.0     4.0    6.0    8.0    10.0    12.0    14.0     16.0    18.0    20.0
0.24   QI: 2.48    Q2: 3.14    Q3:  3.95    Q4: 5.19      Max: 20.03
Median:  3.36
               PROPORTIONS AND AREA BELOW THE VALUE OF Xc
               Gc1:  0.151    Acl:  4066     Acu1:  7718
               Gc2:  0.382   Ac2:  10261     Acu2:  14758
               Gc3:  0.879   Ac3: 23625    Acu3:  28605
Figure  9-74.  Population Estimates. Dissolved Organic Carbon (DOC11), Subregion 1B.
                                      269

-------
VARIABLE: DOC AS MG/L FOR LAKES*.2000 HA
   Xcl:  2.0     Xc2: 3.0       Xc3: 6.0
Population Size (N): 1483  SE(N): 57.5        Sample Size:  163
Lake Area (A): 72412      SE(A): 12013
                                                                16 FEB 1986
   1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
      0.0
Min:   0.14
            2.0    4.0    6.0     8.0     10.0    12.0    14.0    16.0    18.0    20.0
             Q!:  3.00    Q2: 3.99    Q3: 5.13     Q4:  6.82     Max: 17.05
Median:
Mean:
Std. Dev.:
          4.42
          5.03
          2.56
PROPORTIONS AND NUMBERS BELOW
Pcl: 0.062 Nc1: 92 Ncu1: 136
Pc2: 0.200 Nc2:296 Ncu2: 371
PC3: 0.725 Nc3: 1075 Ncu3: 1181
THE VALUE OF Xc
   1.0-
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
      o.o
Min:  0.14

Median:  3.45
2.0     4.0

Q- 2-45
 6.0

Q2:
8.0     10.0

    Q3:  3
                                              12.0    14.0

                                                  Q4: 5-
                                                            16.0    18.0    20.0

                                                                Max:  17-05
                     PROPORTIONS AND AREA BELOW THE VALUE OF
                     Gcl: 0.065   Acl: 4682
                                                    cu1:
                                                         8416
                     Gc2: 0.361    Ac2:  26147      Acu2: 43233
                     Gc3: 0.857    Ac3:  62059     Acu3: 81721
Figure 9-75.  Population Estimates,  Dissolved Organic Carbon (DOC11), Subregion 1C.
                                      270

-------
VARIABLE: DOC AS MG/L FOR LAKESs.2000 HA
   Xc1:  2.0      Xc2: 3.0       Xc3:  6.0
Population Size (N): 1318   SE(N):  93.7        Sample Size: 126
Lake Area (A):  36403     SE(A):  4381
                                                               16 FEB 1986
   o.o
      o.o
Min:  0.17
            2.0     4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
             Q+ 2.34     Q2:  3.19     Q3:  4.70     Q4: 6.81     Max: 13.82
Median:
Mean:
Std. Dev.:
          3.98
          4.64
          2.79
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.180 Nc1: 238 Ncu1: 318
Pc2: 0.341 Nc2:450 Ncu2: 554
Pc3: 0.730 Nc3:962 Ncu3: 1108
OFXC
   1.0
   0.8-
   0.6-
G(X)
   0.4-
   0.2-
   0.0
Min:
      o.o
     0.17
            2.0
4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
2     Q2:  3.17     Q3:  4.07     Q4: 6.40     Max: 13.82
Median:  3.51
                     PROPORTIONS AND AREA BELOW THE VALUE OF
  Gc1:  0.158    Ac1:  5740
  Gc2:  0.338   A^:  12312
  Gc3:  0.776    Ac3:  28236
   w *j            \*^
                                                    cul:
                                                         8469
                                                  Acu2:  16010
                                                  Acu3:  34774
Figure 9-76.  Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 1D.
                                     271

-------
VARIABLE: DOC AS MG/L FOR LAKES^.2000 HA
   Xc1: 2.0     Xc2: 3.0       Xc3: 6.0
Population Size (N): 1526   SE(N): 66.0        Sample Size: 176
Lake Area (A):  173400     SE(A): 25725
                                                   16 FEB 1986
    1.0
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
       0.0    2.0    4.0    6.0     8.0     10.0    12.0     14.0    16.0    18.0    20.0
Min:   0.22   Qj:  2.90    Q2: 4.42    Q3: 6.05     Q4: 8.37     Max: 26.38
Median:   5.20
Mean:     6.05
Std. Dev.: 3.68
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pc1: 0.044 NC1: 67 Ncu1: 103
Pc2: 0.214 Nc2:326 Ncu2: 402
Pc3: 0.579 Nc3:883 Ncu3: 990
OFXC
    1.0
   0.8-
   0.6-
G(X)
   0.4-
   0.2-
   0.0-
      0.0
Min:  0.22


Median:  5.12
2.0     4.0     6.0    8.0    10.0    12.0    14.0     16.0    18.0    20.0
Qj: 2.84    Q2: 4.38     Qj:  6.43     Q4: 6.96  .   Max: 26.38
         PROPORTIONS AND AREA BELOW THE VALUE OF
Gc1:  0.060   Ac1:  10321
Gc2:  0.278   Ac2:  48223
      0.548   Ac3:  95098
                                                    cu1:
                                             22261
                                                   Acu2: 75550
                                                       ;: 126267
Figure 9-77.  Population Estimates. Dissolved Organic Carbon (DOC11), Subregion 1E.
                                      272

-------
VARIABLE: DOC AS MG/L FOR LAKES*.2000 HA
   Xc1: 2.0      Xc2:  3.0       Xc3:  6.0
Population Size (N): 8501  SE(N):  315.5
Lake Area (A):  501457     SE(A):  73306
                                                            16 FEB 1986
                                       Sample Size:  587
    1.0
   0.8-
   0.8-
F(X)
   0.4-
   0.2-
   0.0-
       0.0    2.0     4.0
Min:  0.00   Qj: 4.38
                     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
                    Q2: 6.06     Q3: 9.05    Q4: 12.06     Max: 28.80
Median:   7.53
Mean:     8.42
Std. Dev.: 4.48
PROPORTIONS AND NUMBERS BELOW THE VALUE OF Xc
PC*
Pc2'-
Pc3'
0
0
0
.013
.067
.387
Nd:
Nc2:
Nc3'
111
567
3289
Ncu1:
Ncu2:
Ncu3:
165
782
3790
    1.0-
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
Min:
 0.0    2.0     4.0     6.0     8.0     10.0    12.0     14.0    16.0    18.0    20.0
0.00   Of. 4.08     Q2: 5.59    Q3: 6.79     Q4: 11.82     Max:  28.80
Median: 5.74
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gel-
GC2:
GC3^
0.003
0.041
0.558
Ad:
Ac2:
Ac3:
1654
20395
280001
Acu1:
Acu2:
Acu3:
2528
31382
389186
Figure 9-78.  Population Estimates, Dissolved Organic Carbon (DOC11), Region 2.
                                         273

-------
 VARIABLE: DOC AS MG/L FOR LAKES*.2000 HA
                                                    16 FEB 1986
    Xc1: 2.0     Xc2: 3.0
 Population Size (N): 1467
 Lake Area (A):  142979
                    Xc3:  6.0
               SE(N):  74.3
               SE(A):  37582
                                           Sample Size: 147
    o.o
       o.o
 Min:  1.10
 Median:
 Mean:
 Std. Dev.:
    1.0-
   2.0    4.0    6.0     8.0    10.0    12.0    14.0    16.0   18.0    20.0
   Qj: 5.53    Q2: 7.63    Q3: 9.94     Q4:  12.66    Max: 23.70
9.15
9.75
4.62
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF X,
                    Pcl: 0.002  Nc1: 3       Ncul:  7
                    Pc2: 0.012   Nc2:17      Ncu2:  40
                    Pc3: 0.250  Nc3:364    Ncu3:  465
   0.0
      0.0
Min:  1.10


Median:  6.39
            2.0     4.0
            Qj: 4.38
                6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
              Q2: 5.56    Q3:  7.56     Q4: 10.47     Max: 23.70
                     PROPORTIONS AND AREA BELOW THE VALUE OF Xc
                     Gc1:  0.000   Ac1:  64        Acu1:   150
                     G^:  0.031   A^:  4426      Acu2:  11343
                     Gc3:  0.493   Ac3: 70527     Acu3:  126724
Figure  9-79.  Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 2A.
                                     274

-------
VARIABLE: DOC AS MG/L FOR LAKESi2000 HA
   Xc1: 2.0     Xc2: 3.0       Xc3: 6.0
Population Size (N): 1050  SE(N): 72.5        Sample Size: 146
Lake Area (A):  34025     SE(A): 10854
                                                         16 FEB 1986
    1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0
      0.0   2.0    4.0     6.0    8.0     10.0    12.0    14.0     16.0    18.0    20.0
Min:  0.20   Q^ 3.43    Q2: 5.02    Q3:  7.67     Q4: 11.19     Max: 28.80
Median:   6.76
Mean:     7.86
Std. Dev.:  5.12
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF X,
               Pc1: 0.044
               Pc2: 0.132
               Pc3: 0.456
                    NC1:46
                    Nc2:138
                    Nc3:478
                    Ncu1: 85
                    Ncu2: 204
                    Ncu3: 588
   o.o
Min:
 o.o
0.20
2.0     4.0
QJ: 6.77
 6.0     8.0    10.0    12.0     14.0    16.0    18.0   20.0
Q2: 10.29    Q3:  11.12     04: 11.65     Max:  28.80
Median:  11.02
                     PROPORTIONS AND AREA BELOW THE VALUE OF X,
               Gc1: 0.023    Acl:  777
                    Gc2:  0.054
                    Gc3:  0.172
                            Ac2:  1826
                            Ac3:  5850
                                     Acul:  1466
                                     Acu2: 2687
                                     Acu3: 7396
Figure  9-80. Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 2B.
                                      275

-------
 VARIABLE: DOC AS MG/L FOR LAKESs.2000 HA
    Xc1: 2.0     Xc2: 3.0       Xc3:  6.0
 Population Size (N): 1480  SE(N): 48.8
 Lake Area (A):  97556     SE(A): 21357
                   16 FEB 1986
Sample Size: 153
    o.o
       -    2.0     4.0     6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
 Min:  0.00   QI: 3.18    Q2:  3.98     Q3: 5.59     Q4: 8.06     Max:  18.40
PROPORTIONS AND NUMBERS E
Median: 4.60 Pcl: 0.041 Nc1: 61 Ncul
Mean: 5.98 Pc2: 0.165 Nc2:245 Ncu2
Std. Dev.: 3.89 Pc3: 0.658 Nc3:973 Ncu3


0.8- /-^
0.6- Jf
GOO ;
0.4- \S
il
0.2- ,-/
j f
- 2.0 4.0 6.0 8.0 10.0 12.0
Min: 0.00 Qt: 3.27 Q2: 3.58 Q3: 3.98
PROPORTIONS AND AREA BELOV
Median: 3.94 Gc1: 0.008 Ac1: 777
Gc2: 0.120 Ac2: 11670
Gc3: 0.867 Ac3: 84569
3ELOW THE VALUE OF X~
c
98
: 319
: 1083

/

14.0 16.0 18.0 20.
04: 4.96 Max: 18.40
V THE VALUE OF Xc
Acul: 1304
Acu2: 19568
Acu3: 119804
Rgure  9-81.  Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 2C.
                                      276

-------
VARIABLE: DOC AS MG/L FOR LAKESs.2000 HA
   Xcl:  2.0     Xc2: 3.0       Xc3: 6.0
Population Size (N): 4515  SE(N): 293.9       Sample Size: 141
Lake Area (A): 226896    SE(A): 58202
16 FEB 1986
   o.o
      0.0    2.0    4.0    6.0    8.0    10.0    12.0    14.0     16.0    18.0    20.0
Min:   1.90    QV'  5.19     Q2: 6.38     Q3:  9.47     Q4: 12.99     Max: 20.00
Median:   8.77
Mean:     8.92
Std. Dev.: 4.11
PROPORTIONS AND NUMBERS BELOW THE
Pc1: 0.000 Nc1: 2 Ncu1: 3
Pc2: 0.037 Nc2:167 Ncu2: 356
Pc3: 0.327 Nc3:1474 Ncu3:.1940
VALUE OF Xc
   0.0
      0.0    2.0    4.0    6.0    8.0    10.0    12.0    14.0    16.0   18.0    20.0
Min:  1.90    Qj:  5.07    Q2: 5.73     Q3: 7.54     Q4: 14.54    Max: 20.00
Median: 5.82
PROPORTIONS
Gcl:
Gc2:
Gc3:
0.000
0.011
0.525
AND
Ac1:
Ac2:
Ac3:
AREA BELOW THE
37
2472
119056
Acu1:
Acu2
Acu3
VALUE OF
73
5595
: 205769
xc



Figure 9-82.  Population Estimates. Dissolved Organic Carbon (DOC11), Subregion 2D.
                                         277

-------
 VARIABLE: DOC AS MG/L  FOR LAKES*.2000 HA
     Xcl: 2.0     Xc2: 3.0       Xc3: 6.0
                                                           16 FEB 1986
 Population Size (N): 258
 Lake Area (A):  24272
                    SE(N): 20.5
                    SE(A): 4795
Sample Size:  94
     1.0
    0.8
    0.6
 F(X)
    0.4-
    0.2-
    0.0-
 Min:
 -    2-     4-0     6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
0.50   QI: 1.12     Q2: 1.61      Q3:  2.17     Q4: 3.85     Max: 14.90
 Median:    1.94
 Mean:     2.64
 Std. Dev.:  1.92
    1.0


    0.6


    0.6-
 G(X)

    0.4-


    0.2-
PROPORTIONS AND NUMBERS BELOW
Pc1: 0.536 Ncl: 138 Ncul: 164
Pc2: 0.652 Nc2:168 Ncu2: 197
Pc3: 0.958 Nc3:247 Ncu3: 280
THE VALUE OF Xc
   0.0-
      0.0
             2.0
                   4.0
                          6.0
                                 8.0
                                        10.0
                                               12.0
                                                     14.0
                                                            16.0
                                                                   18.0
                                                                          20.0
Min:   0.50    Q,:  0.77     Q2: 1.19     Q3:  1.33     Q4: 1.94      Max:  14.90
Median: 1.27
               PROPORTIONS AND AREA BELOW THE VALUE OF Xc
               Gcl:  0.876    Ac1:  21255      Acu1:  29067
               Gc2:  0.935   Ac2:  22702      Acu2:  30602
               Gc3:  0.985   Ac3:  23901      Acu3:  31793
Figure  9-83. Population Estimates.  Dissolved Organic Carbon (DOC11), Subregion 3A.
                                       278

-------
VARIABLE: DOC AS MG/L FOR LAKESs.2000 HA
   Xc1:  2.0     Xc2: 3.0       Xc3: 6.0
Population Size (N): 2098  SE(N): 212.6       Sample Size: 148
Lake Area (A):  66169     SE(A): 10158
                                                              16 FEB 1986
   i.o-
   0.8-
   0.6-
F(X)
   0.4-^
   0.2-
   o.o-
      0.0    2.0     4.0    6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:   0.29   Q^ 4.00    Q2: 7.46    03:  10.10    Q4: 13.57    Max: 48.22
Median:    8.60
Mean:     9.65
Std. Dev.:  6.73
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF Xc
                     3cl:  0.115   Nc1: 242     Ncu1: 340
                       :  0.140   Nc2:293    Ncu2: 396
                       : 0.311   NC3:653    NCU3: 833
   1.0-


   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0
      0.0   2.0     4.0    6.0    8.0     10.0    12.0    14.0    16.0    18.0    20.0
Min:  0.29   Q^ 3.29    Q2: 6.32    03:  8.87    Q4: 12.04    Max: 48.22
Median: 7.72
                     PROPORTIONS AND AREA BELOW THE VALUE OF Xc
                     Gc1:  0.141     Acl:  9327      Acu1:  14289
                     Gc2:  0.177    Ac2:  11702      Acu2: 16662
                        :  0.380   Ac3:  25164     Acu3: 34359
Figure 9-84. Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 38.
                                     279

-------
 VARIABLE: DOC AS MG/L FOR LAKESi.2000 HA
    Xcl: 2.0     Xc2: 3.0      Xc3: 6.0
 Population Size (N): 7096  SE(N):  165.3       Sample Size: 763
 Lake Area (A):  427864    SE(A): 36414
                                                              16 FEB 1986
   0.0
       0.0   2.0     4.0     6.0    8.0
Min:   0.14   Qj: 2.82    Q2: 3.78
                                      10.0    12.0    14.0    16.0    18.0   20.0
                                       :  5.01     Q4: 6.64     Max:  26.38
 Median:   4.30
 Mean:     4.95
 Std. Dev.: 2.81
                     PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X
                    Pc1:  0.925   Ncl: 6562
                    Pc2:  0.759   Nc2:5387
                       : 0.264   N/.-:1873
Ncul:  6841
Ncu2: 5677
Ncu3: 2090
   o.o
      0.0    2.0    4.0    6.0     3.0
Min:  0.14    QI: 2.68    Q2: 3.64
                                      10.0    12.0    14.0    16.0    18.0    20.0
                                      :  4.53    Q4: 6.51     Max: 26.38
Median:  3.93
                    PROPORTIONS AND AREA ABOVE THE VALUE OF X<
                    Gcl: 0.930    Ac1:  397967    Acul:  456663
                    Gc2: 0.717   A^:  306592    Acu2:  357034
                       c 0.244   AC3:  104563    ACU3:  136060
Figure  9-85.  Population Estimates. Dissolved Organic Carbon (DOC11), Region 1.
                                    280

-------
VARIABLE: DOC AS MG/L FOR LAKES*.2000 HA
   Xc1:  2.0     Xc2: 3.0       Xc3: 6.0
Population Size (N): 1290  SE(N): 47.6        Sample Size:  155
Lake Area (A): 118776     SE(A): 22186
16 FEB 1986
   0.0
      0.0    2.0    4.0    6.0     8.0     10.0    12.0    14.0    16.0    18.0   20.0
Min:  0.67    Qj:  2.77     Q2: 3.77    Q3: 4.68     Q4: 5.80     Max:  15.14
Median:   4.15
Mean:     4.42
Std. Dev.:  2.05
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
PC1:
Pc2:
Pc3:
0.926 I
0.775
0.149 f

-------
 VARIABLE: DOC AS MGA FOR LAKES^2000 HA
    Xc1:  2.0     Xc2: 3.0       Xc3: 6.0
                                                              16 FEB 1986
 Population Size (N): 1479
 Lake Area (A):  26872
                         SE(N):  92.9
                         SE(A): 2913
Sample Size: 143
    o.o
      0.0    2.0     4.0    6.0    8.0
Min:  0.24   QI: 2.90    Q2: 3.55
                                       10.0    12.0    14.0    16.0    18.0   20.0
                                        :  4.29     Q4: 5.97     Max:  20.03
 Median:   3.84
 Mean:     4.47
 Std. Dev.: 2.23
                    PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X,
                    Pcl: 0.946   Nc1: 1400    Ncul:  1558
                    Pc2: 0.756   Nc2:1118     Ncu2:  1291
                    Pc3: 0.186   Nc3:274     Ncu3:  398
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0   2.0     4.0     6.0    8.0    10.0   12.0
Min:  0.24   Qj: 2.48    Q2: 3.14    Q3: 3.95
                                                   14.0    16.0    18.0    20.0
                                                   L:  5.19     Max: 20.03
Median: 3.36
                    PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
                    Gcl:  0.849    Acl:  22816     Acu1:  26635
                    Gc2:  0.634   Ac2:  17026     Acu2: 20493
                       i:  0.121    A-v  3247      A,,,,-*: 4857
Figure  9-87.  Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 1B.
                                      282

-------
 VARIABLE: DOC AS MG/L FOR LAKES*.2000 HA
    Xcl: 2.0     Xc2: 3.0      Xc3: 6.0
 Population Size (N): 1483  SE(N):  57.5        Sample Size: 163
 Lake Area (A):  72412      SE(A): 12013
                                                         16 FEB 1986
   o.o
       o.o
 Min:   0.14
 Median:
 Mean:
 Std. Dev.:
       2.0     4.0    6.0     8.0    10.0    12.0    14.0    16.0    18.0   20.0
       Qj: 3.00    Q2: 3.99    Q3:  5.13     Q4: 6.82     Max:  17.05
    4.42
    5.03
    2.56
         PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X,
        Pcl:  0.946   Ncl: 1402    Ncul:  1500
        Pc2:  0.805   Nc2:1194    Ncu2:  1300
        Pc3: 0.275   Nc3:408    Ncu3:  494
   o.o
Min:
 o.o
0.14
2.0     4.0
QJ: 2.45
 6.0     8.0
Q2: 3.16
  10.0    12.0     14.0    16.0    18.0    20.0
Q3:  3.78     Q4: 5.38      Max:  17.05
Median:  3.45
                    PROPORTIONS AND AREA ABOVE THE VALUE OF X,
               Gcl:  0.949
               Gc2:  0.640
               Gc3:  0.143
                      Ac1:  68688
                     Ac2:  46365
                     Ac3:  10353
                         Acu1:  88272
                         Acu2: 57379
                         Acu3: 14556
Figure  9-88.  Population Estimates,  Dissolved Organic Carbon (DOC11), Subregion 1C.
                                    283

-------
 VARIABLE: DOC AS MG/L FOR LAKES^2000 HA
    Xc1:  2.0      Xc2: 3.0       Xc3: 6.0
 Population Size (N): 1318   SE(N):  93.7        Sample Size: 126
 Lake Area (A):  36403     SE(A): 4381
                                           16 FEB 1986
    1.0
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
       0.0    2.0     4.0    6.0    8.0     10.0    12.0    14.0    16.0    18.0    20.0
 Min:  0.17    QI: 2.34    Q2: 3.19     Q3: 4.70     Q4:  6.81      Max: 13.82
 Median:   3.98
 Mean:    4.64
 Std. Dev.: 2.79
PROPORTIONS AND NUMBERS ABOVE THE
Pcl: 0.839 Ncl: 1106 Ncu1: 1259
Pc2: 0.664 Nc2:875 Ncu2: 1022
Pc3: 0.270 Nc3:356 Ncu3: 462
VALUE OF Xc
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      -   2.0    4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:   0.17    QI:  2.42     Q2: 3.17     Q3:  4.07     Q4: 6.40     Max: 13.82
Median: 3.51
                     PROPORTIONS AND AREA ABOVE THE VALUE OF X
Gc1:  0.882    Ac1:  32126
                                                    cul:
                                                         39234
                     Gc2: 0.665   A^:  24217     Acu2:  30909
                     Gc3: 0.224   Ac3:  8167      Acu3:  12070
Figure 9-89. Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 1D.
                                     284

-------
VARIABLE: DOC AS MG/L  FOR LAKES-s.2000 HA
    Xcl: 2.0     Xc2: 3.0       Xc3: 6.0
Population Size (N): 1526   SE(N): 66.0        Sample Size: 176
Lake Area (A):  173400     SE(A): 25725
                                                          16 FEB 1986
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
Min:
 0.0    2.0     4.0     6.0    8.0    10.0    12.0    14.0    16.0    18.0   20.0
0.22   Qj: 2.90     Q2:  4.42     Q3:  6.05     Q4:  8.37     Max:  26.38
Median:   5.20
Mean:     6.05
Std. Dev.: 3.68
PROPORTIONS AND NUMBERS ABOVE THE VALUE
Pc1: 0.956 Nc1: 1459 Ncu1: 1569
Pc2: 0.786 Nc2:1200 Ncu2: 1313
Pc3: 0.421 Nc3:643 Ncu3: 743
OFXC
   0.0
Min:
 o.o
0.22
2.0     4.0
Q> 2.84
 6.0     8.0    10.0    12.0
Q2: 4.38    03:  6.43
  14.0    16.0    18.0    20.0
  :  6.96     Max: 26.38
Median: 5.12
                     PROPORTIONS AND AREA ABOVE THE VALUE OF
               Gc1:  0.940
               Gc2:  0.722
               Gc3:  0.452
                       Ac1: 163079
                      Ac2: 125178
                           78303
Acu1:  204151
Acu2: 159055
Acu3: 109175
Figure 9-90. Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 1E.
                                     285

-------
VARIABLE: DOC AS MG/L FOR LAKESs.2000 HA
    Xc1: 2.0     Xc2: 3.0      Xc3: 6.0
Population Size (N):  8501  SE(N):  315.5       Sample Size: 587
Lake Area (A): 501457     SE(A): 73306
                                                              16 FEB 1986
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0   2.0    4.0     6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
Min:   0.00   Qj: 4.38     Q2:  6.06     Q3:  9.05    Q4: 12.06    Max: 28.80
Median:   7.53
Mean:     8.42
Std. Dev.:  4.48
                     PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X
0.988
i: 8399   N
                                             cu1:
                                                 8919
                       :  0.936  Nc2:7958   Ncu2: 8497
                       : 0.629  Nc3:5351    Ncu3: 5938
   1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
                                                               \
                                                              "Y
      0.0    2.0     4.0    6.0     8.0
Min:  0.00   Q^ 4.08    Q2: 5.59
                                      10.0    12.0     14.0    16.0    18.0    20.0
                                     3:  6.79     Q4: 11.82     Max: 28.80
Median:  5.74
                    PROPOFr'ONS AND AREA ABOVE THE VALUE OF X,
                    Gcl:  0.997    Ac1:  300061    Acu1:  620658
                    Gc2:  0.961    Ac2:  481668    Acu2: 602287
                    Gc3:  0.450    Ac3: 225616    Acu3: 287467
Figure  9-91.  Population Estimates, Dissolved Organic Carbon (DOC11), Region 2.
                                    286

-------
VARIABLE: DOC AS MG/L  FOR LAKES^.2000 HA
   Xc1:  2.0     Xc2: 3.0       Xc3: 6.0
Population Size (N): 1457    SE(N): 74.3        Sample Size: 147
Lake Area (A):  142979      SE(A): 37582
                                                                 16 FEB 1986
    1.0
    0.8-
    0.6-
    0.4-
    0.2-
    0.0
 Min:
 0.0
1.10
             2.0
Median:   9.15
Mean:     9.75
Std. Dev.: 4.62
                   4.0     6.0     8.0     10.0    12.0     14.0    16.0    18.0    20.0
                   3     Q2: 7-63     Q3: 9-94     ^4 : 12-66     Max: 23.70
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
Pc1: 0.998 Nc1: 1454
Pc2: 0.988 Nc2:1440
Pc3: 0.760 Nc3: 1107
Ncul: 1576
Ncu2: 1562
Ncu3: 1238
                                                                    18.0
                                                                          20.0
Min:
Median: 6.39
                        Q2:  5.56     03:  7.56     Q4: 10.47    Max:  23.70
PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
Gel-'
Gc2:
GC3^
1.000
0.969
0.509
Ad:
Ac2:
Ac3:
142915
138553
72732
Acu1:
Acu2:
Acu3:
204738
200198
101387
Figure 9-92.  Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 2A.
                                      287

-------
VARIABLE: DOC AS MG/L FOR LAKES^.2000 HA
   Xc1:  2.0      Xc2:  3.0       Xc3: 6.0
Population Size (N): 1050   SE(N): 72.5        Sample Size: 146
Lake Area (A):  34025      SE(A): 10854
                                                              16 FEB 1986
   1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
Min:
      0.0    2.0     4.0     6.0    8.0    10.0    12.0    14.0    16.0   18.0    20.0
     0.20   Qj: 3.43    Q2: 5.02     Q3: 7.67     Q4: 11.19     Max: 28.80
Median:   6.76
Mean:     7.86
Std. Dev.:  5.12
                     PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
                    Pc1:  0.956  Nc1: 1004   Ncu1: 1125
                    Pc2:  0.871   Nc2:914     Ncu2: 1037
                    Pc3: 0.567  Nc3:595    Ncu3: 713
   1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0
Min:  0.20


Median:  11.02
            2.0     4.0     6.0    8.0    10.0   12.0    14.0    16.0    18.0    20.0
            Q^ 6.77    Q2: 10.29    Q3:  11.12    Q4: 11.65     Max: 28.80
                     Gc1:  0.977
                     Gc2:  0.947
                     Gc3:  0.840
AND AREA ABOVE THE VALUE OF
 Ac1:  C3249     Acu1:  51123
Ac2:  32222     Acu2: 50119
      28590     Acu3: 46581
Figure 9-93.  Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 2B.
                                   288

-------
 VARIABLE: DOC AS MG/L  FOR LAKESs.2000 HA
    Xc1: 2.0     Xc2: 3.0       Xc3: 6.0
 Population Size (N): 1480   SE(N): 48.8        Sample Size: 153
 Lake Area (A):  97556      SE(A): 21357
                                                                16 FEB 1986
    1.0-
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
       0.0    2.0     4.0    6.0    8.0     10.0    12.0     14.0    16.0    18.0    20.0
 Min:  0.00   Qj: 3.18     Q2: 3.98    Q3: 5.59     Q4: 8.06     Max:  18.40
 Median:   4.60
 Mean:     5.98
 Std. Dev.: 3.89
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X.
Pc1: 0.965 Nc1: 1427
Pc2: 0.849 Nc2:1256
PC3: 0.342 Nc3:507
Ncul: 1513
Ncu2: 1355
Ncu3: 609
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   o.o
Min:
      0.0    2.0     4.0     6.0     8.0    10.0    12.0    14.0    16.0    18.0    20.0
     0.00   Qj: 3.27     Q2:  3.58    Q3:  3.98    Q4: 4.96     Max: 18.40
Median:  3.94
                     PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
                     Gcl:  0.995    Acl:  97038    Acu1:  132186
                     Gc2:  0.886    Ac2:  86470    Acu2:  121511
                     Gc3:  0.133    Ac3:  12988    Acu3:  20160
Figure  9-94.  Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 2C.
                                     289

-------
 VARIABLE: DOC AS MG/L  FOR LAKES*.2000 HA
    Xc1: 2.0     Xc2: 3.0       Xc3: 6.0
 Population Size (N): 4515   SE(N): 293.9       Sample Size:  141
 Lake Area (A):  226896     SE(A): 58202
                                        16 FEB 1986
    1.0-
    0.8-
    0.6-
    0.4-
    0.2-
   0.0-
       0.0    2.0    4.0    6.0     8.0    10.0    12.0    14.0    16.0    18.0   20.0
Min:  1.90    (ty 5.19     Q2: 6.38    03:  9.47     Q4:  12.99     Max;  20.00
Median:   8.77
Mean:     8.92
Std. Dev.: 4.11
                     PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X
:  1.000
:  0.963
:  0.696
Ncul:  4997
:  4513
,:4348   Ncu2: 4848
":3141    NU.T: 3692
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0'
      0-0   2.0    4.0     6.0     8.0    10.0    12.0    14.0     16.0    18.0    20.0
Min:  1.90    Q^ 5.07     Q2:  5.73    Q3:  7.54     Q4: 14.54     Max: 20.00
Median: 5.82
PROPORTIONS AND AREA ABOVE THE VALUE OF X~
Srf
Gc1: 1.000
Gc2: 0.989
Gc3: 0.491
Acl: 226859
Ac2: 224423
Ac3: 111306
Acu1: 322602
Acu2: 320344
Acu3: 162583
Figure 9-95. Population Estimates, Dissolved Organic Carbon (DOC11), Subregion 2D.
                                      290

-------
VARIABLE: DOC AS MG/L FOR LAKESi.2000 HA
   Xc1:  2.0      Xc2: 3.0      Xc3: 6.0
Population Size (N): 258   SE(N):  20.5        Sample Size: 94
Lake Area (A):  24272      SE(A): 4795
                                                                16 FEB 1986
    o.o-
 Min:
      0.0
     0.50
             2.0
        4.0     6.0    8.0    10.0    12.0     14.0    16.0    18.0    20.0
     1.12     Q2:  1.61      Q3: 2.17     Q4: 3.85     Max: 14.90
 Median:   1.94
 Mean:    2.64
 Std. Dev.: 1.92
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X-
Pcl: 0.520 Nc1: 134
Pc2: 0.353 Nc2:91
Pc3: 0.061 Nc3:16
Ncul: 165
Ncu2: 118
Ncu3: 28
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
Min:
     o.o
     0.50
-i	1       i      i       i       i       P"    i      i
 2-0    4.0    6.0     8.0    10.0    12.0    14.0    16.0     18.0    20.0
 Qi:  0.77     Q2: 1.19     Q3:  1.33     Q4: 1.94     Max: 14.90
Median: 1.27
                    PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
                    Gc1:  0.244    Ac1:  5922      Acu1:  10293
                    Gc2:  0.066   Ac2:  1598      Acu2:  2293
                    Gc3:  0.016   Ac3:  393       Acu3:-680
Figure 9-96. Population Estimates, Dissolved Organic Carbon {DOC1D, Subregion 3A.
                                     291

-------
 VARIABLE: DOC AS MG/L FOR LAKES^.2000 HA
    Xc1: 2.0     Xc2: 3.0       Xc3:  6.0
 Population Size (N): 2098  SE(N): 212.6
 Lake Area (A):  66169     SE(A): 10158
                                          16 FEB 1986
                       Sample Size:  148
    1.0
    0.8-


    0.6-
 1-FOQ

    0.4-


    0.2-
   0.0'
       0.0    2.0    4.0     6.0     8.0    10.0    12.0    14.0    16.0   18.0    20.0
Min:  0.29    QI:  4.00     Q2: 7.46     Q3:  10.10    Q4: 13.57    Max: 48.22
Median:   8.60
Mean:     9.65
Std. Dev.: 6.73
 PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X(
Pc1: 0.885  Nc1: 1857   Ncu1:  2201
Pc2: 0.860  Nc2:1805   Ncu2: 2148
Pc3: 0.689  Nc3:1445   Ncu3: 1766
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   o.o-
                                                     >____ ^
      o.o
Min:  0.29

Median: 7.72
            2.0     4.0     6.0    8.0    10.0    12.0    14.0    16.0    18.0    20.0
            Qi: 3.29    Q2: 6.32    Q3:  8.87    Q4: 12.04     Max: 48.22
                     PROPORTIONS AND AREA ABOVE THE VALUE OF X,
                     Gc1:  0.859
                     Gc2:  0!823
                     Gc3:  0.620
              Acl: 56842
              Ac2: 54467
              Ac3: 41004
Acul:  72961
AC(j2: 70588
Acu3: 55386
Figure  9-97.  Population Estimates,  Dissolved Organic Carbon (DOC11), Subregion 3B.
                                   292

-------
 VARIABLE: ELEVATION IN M FOR LAKES s.2000 HA
                    16 FEB 1986
 Population Size (N): 7096  SE(N): 165.3
 Lake Area (A):  427864    SE(A): 36414
     1.0
Sample Size:  763
    o.o
       -0        10-       200.0       300.0       400.0       500.0       600.0
 Min:  1.50     QI: 109.68  Q2: 241.39   Q3: 361.01   Q4: 490.99   Max: 1582.00
 Median:    307.19
 Mean:     319.83
 Std. Dev.:  223.72
   o.o
       0-0       100.0       200.0       300.0       400.0       500.0        600.0
Min:  1.50    Q,:  98.70    Q2:  170.23   Q3:  313.90  04: 493.92   Max:  1582.00

Median: 229.99
Figure 9-98 .  Population Estimates, Elevation, Lake (ELEV), Region
                                     293

-------
 VARIABLE: ELEVATION IN M  FOR LAKES i2000 HA
                    16 FEB 1986
 Population Size (N): 8501  SE(N):  315.5
 Lake Area (A):  501457     SE(A):  73306
Sample Size:  587
    1.0
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
       0.0        100.0       200.0       300.0       400.0       500.0        600.0
 Win:  184.40 Q}: 339.26  Q2:  390.20  Q3:  425.60  Q4: 487.06   Max: 594.40
 Median:   408.31
 Mean:     404.81
 Std. Dev.: 85.04
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0-0       100.0       200.0       300.0       400.0        500.0       600.0
Min:   184.40  0^ 369.40  Q2: 407.24  Q3:  433.79  Q4: 473.13    Max: 594.40


Median:  413.54
Figure 9-99 .  Population Estimates, Elevation, Lake (ELEV), Region 2.
                                     294

-------
 VARIABLE: ELEVATION IN M FOR LAKES s.2000 HA

 Population Size (N): 258   SE(N):  20.5         Sample Size: 94
 Lake Area (A):  24272     SE(A): 4795
16 FEB 1986
    i.o
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
       0-0        100.0       200.0       300.0        400.0       500.0        600.0
 Min:  122.50  QI: 22138   Q2: 247.71   Qy 309.70  Q4: 453.76   Max: 1103.40


 Median:   264.51
 Mean:    358.39
 Std. Dev.: 215.02
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0'
       -       100.0        200.0       300.0       400.0        500.0       600.0
Min:   122.50  QI: 241.71   Q2: 301.50  Q3:  424.13   Q4: 542.37    Max:  1103.40

Median: 325.36
Figure 9-100.  Population Estimates, Elevation, Lake (ELEV). Subregion 3A.
                                      295

-------
VARIABLE: ELEVATION IN M FOR LAKES ^2000 HA

Population Size (N): 2098  SE(N):  212.6        Sample Size: 148
Lake Area (A):  66169      SE(A): 10158
                                                                 16 FEB 1986
    i.o-
    0.8-
    0.6-
    0.4-
    0.2-
    0.0'
       0.0        100.0       200.0       300.0       400.0       500.0        600.0
 Min:  7.00   Q^ 14.63    Q2: 20.29   Q3:  25.65    Q4: 30.95    Max: 53.30
 Median:   21.19
 Mean:    23.37
 Std. Dev.: 8.77
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0       100.0        200.0       300.0
Min:  7.00    Q-j:  14.62    Q2: 21.55    03:  27.96
                                                  400.0        500.0       600.0
                                                  Q4: 31.92     Max: 53.30
Median: 25.66
Figure 9-101.  Population Estimates, Elevation, Lake (ELEV), Subregion 3B.
                                     296

-------
  VARIABLE: FLUORIDE AS UEQA FOR LAKES s.2000 HA
                            16 FEB 1986
  Population Size (N): 7096   SE(N):  165.3
  Lake Area (A):  427864     SE(A): 36414
        Sample Size: 763
     o.o .
                        2-       3-      4-0       5.0      6.0       7.0      8 0
 Min:  0.16    QI: 1.49     Q2: 2.14     Q3: 2.73     Q4: 3.89     Max: 30.88

 Median:   2.40
 Mean:     3.03
 Std. Dev.: 2.62
   o.o
       0-0      1-0      2.0       3.0
Min:   0.16    QI: 1.43     Q2: 2.09

Median: 2.38
   4.0      5.0      6.0
Q3:  2.90     Q4: 4.23
  7.0      8.0
Max: 30.88
Figure 9-102. Population Estimates,  Fluoride (FTL16). Region
                                    297

-------
VARIABLE: FLUORIDE AS UEQ/L FOR LAKES 1.2000 HA

Population Size (N): 8501   SE(N):  315.5       Sample Size:  587
Lake Area (A):  501457     SE(A): 73306
16 FEB 1986
    1.0-
   0.8-
   0.8-
   0.4-
   0.2-
   0.0
       0.0      1.0      2.0       3.0       4.0      5.0      6.0      7.0       8.0
Min:   0.47    Qj: 1.07     Q2:  1.55     Q3:  2.30     Q4: 3.63     Max: 24.42


Median:   1.86
Mean:     2.51
Std. Dev.: 1.98
   1.0'
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0      1.0      2.0       3.0      4.0      5.0      6.0       7.0       8.0
Min:   0.47    0^1.56     Q2:  2.38    03:  3.82     Q4: 4.70      Max: 24.42


Median: 3.23
Figure 9-103.  Population Estimates, Fluoride (FTL16). Region 2.
                                     298

-------
  VARIABLE: FLUORIDE AS UEQ/L FOR LAKES *.2000 HA


  Population Size (N): 258   SE(N):  20.5        Sample Size:  94
  Lake Area (A):  24272      SE(A):  4795
 16 FEB 1986
   0.0
       -0      1-0      2.0       3.0      4.0     .5.0       6.0

Min:   0.05   Q^ 1.08    Q2: 1.88     Qj:  2.69  <   Q4: 3.53



Median:   2.23

Mean:     2.77

Std. Dev.: 2.19
    i.o
    0.8
    0.6-
    0.4-
   0.0-
                    1 - -
       0.0
               1.0
                       2-0       J.O      4.0      5.0       6.0

Min:  0.05   Qj: 0.91     Q2: 1.34     Q3:  1.98     Q4: 3.48



Median: 1.45
                                                                    r
                                                                   7.0

                                                                  Max: 9.69
           s.o
  i
  7.0       8.0

Max: 9.69
Figure 9-104.  Population Ettimates, Fluoride (FTL16), Subregion 3A.
                                     299

-------
 VARIABLE: FLUORIDE AS UEQ/L FOR LAKES s.2000 HA

 Population Size (N): 2098  SE(N): 212.6       Sample Size:  148
 Lake Area (A):  66169      SE(A): 10158
                                          16 FEB 1986
    1.0-
   0.8-


   0.6-
 1-FOO

   0.4-


   0.2-
   0.0-
       0.0      1.0       2.0      3.0      4.0       5.0       6.0      7.0      8.0
Min:  0.32   Qj: 0.85     Q2: 2.21      Q^: 3.69    Q4: 5.61      Max: 16.16


Median:   2.71
Mean:     3.73
Std. Dev.: 3.27
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
                     N ^
      0.0      1.0
Min:   0.32   Q^ 1.11


Median:  2.90
2.0       3.0
  Q2: 2.33
   4.0      5.0      6.0
Q3:  3.65     Q^: 5.27
  7.0       8.0
Max: 16.16
Figure 9-105.  Population Estimates, Fluoride (FTL16), Subregion 3B.
                                      300

-------
  VARIABLE: IRON AS UG/L  FOR LAKES s.2000 HA
                    16 FEB 1986
  Population Size (N): 7096  SE(N):  165.3
  Lake Area (A):  427864     SE(A):  36414
Sample Size:  763
        0.0    30.0    60.0    90.0    120.0    150.0   180.0   210.0   240.0   270JD300
    0.0
                                   	     	'      ^  -w   . I W * W   ATW t W   ./ VJ . U   *? V/W .

 Min:  0.00   QI: 14.58    Q2: 35.94   Qy 72.11    Q4: 136.28   Max: 1082.00
 Median:   49.75
 Mean:     95.12
 Std. Oev.: 137.79
       0.0    30.0    60.0    90.0   120.0   130.0   180.0   210.0   2400
   0.0
                                         	    "   *.iw.v   *.-r\j.\j   ^/U.U   OUU
Min:  0.00   QI: 11.53    Q2: 28.80    Q3: 50.41    Q4: 87.47    Max:  1082.00
Median: 39.95
Figure 9-106.  Population Estimates,  Iron (FE11), Region 1.
                                    301

-------
VARIABLE: IRON AS UG/L FOR LAKES s.2000 HA

Population Size (N): 8501   SE(N):  315.5       Sample Size: 587
Lake Area (A):  501457     SE(A): 73306
16 FEB 1986
    1.0-
   0.8-


   0.6-
1-FOO
   0.4-


   0.2-
   0.0-
       0.0   30.0   60.0    90.0    120.0    150.0   180.0   210.0   240.0   270.0   300.0
Min:   0.00   Qj: 8.22    Q2: 40.00   Q3:  105.38  Q4: 208.20   Max: 2290.00


Median:   55.31
Mean:     145.79
Std. Dev.: 221.32
   o.o
      0.0   30.0    60.0    90.0    120.0   150.0   180.0   210.0   240.0   270.0  300.0
Min:  0.00   Q^  13.52    Q2: 19.04    Q3: 57.82    Q4: 178.77    Max: 2290.00

Median:  40.00
Figure 9-107. Population Estimates, Iron (FE11), Region 2.
                                      302

-------
  VARIABLE: IRON AS UG/L  FOR LAKES 1.2000 HA
                                                           16 FEB 1986
  Population Size (N): 258   SE(N):  20.5
  Lake Area (A):  24272      SE(A):  4795
                                       Sample Size: 94
    o.o
 Min:
 o.o
0.00
30.0    60.0
 Qy.  29.69
 90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
Q2: 62.94   Q3:  107.19    Q4: 255.06   Max: 1810.00
 Median:   83.40
 Mean:     194.93
 Std. Dev.:  338.94
   o.o
       o.o
Min:   0.00
      30.0    60.0
       Qj: 59.63
             90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
            Q2: 22.51   Q3: 29.60    Q4: 97.31     Max: 1810.00
Median: 29.16
Figure 9-108.  Population Estimates, Iron (FE11), Subregion 3A.
                                      303

-------
 VARIABLE: I RON AS UG/L FOR LAKES *2000 HA

 Population Size (N): 2098  SE(N):  212.6        Sample Size: 148
 Lake Area (A):  66169      SE(A): 10158
16 FEB 1986
    o.o
       0.0   30.0   60.0    90.0    120.0   150.0   180.0   210.0   240.0   270.0   300.0
 Min:  0.00   Q^ 3.70    02: 9.30     03: 24.29    Q4: 68.83    Max: 2638.00
Median:   19.07
Mean:     112.33
Std. Dev.: 372.82
   o.o
      0.0   30.0    60.0    90.0   120.0   150.0   180.0   210.0   240.0  270.0   300.0
Min:  0.00   Qj:  3.63    Q2: 9.97    Q3:  20.95    Q4: 49.64    Max: 2638.00
Median: 19.89
Rgure 9-109. Population Estimates,  Iron (FE11), Subregion 38.
                                    304

-------
 VARIABLE: MAGNESIUM AS UEQA FOR LAKES 1.2000 HA

 Population Size (N): 7096  SE(N):  165.3        Sample Size:  763
 Lake Area (A):  427864     SE(A): 36414
16 FEB 1986
    1.0
    0.8
    0.6-
 F(X)
    0.4-
    0.2-
    0.0-
       0.0    50.0   100.0   150.0   200.0   250.0   300.0   350.0   400.0   450.0   500.0
 Win:  10.28   QI: 36.98   Q2: 56.75   Qj: 88.00   Q4: 150.73   Max:  1711.01


 Median:    69.57
 Mean:     112.23
 Std. Dev.:  142.19
    1.0


   0.8


   o.e-
G(X)

   0.4-


   0.2-
   0.0
       0.0   50.0    100.0   150.0  200.0  250.0  300.0  350.0  400.0   450.0   500.0
Min:   10.28   Qj:  36.55   Q2: 49.52    Q3:  72.44   Q4: 102.05   Max:  1711.01


Median: 56.37
Figure 9-110.  Population Estimate!, Magnesium (MG16), Region 1.
                                     305

-------
VARIABLE: MAGNESIUM AS UEQ/L FOR LAKES s.2000 HA
                    16 FEB 1986
Population Size (N): 8501   SE(N):  315.5
Lake Area (A):  501457     SE(A): 73306
Sample Size:  587
   1.0-
   0.8-
   0.8-
F(X)
   0.4-
   0.2-
   0.0
       0.0   50.0    100.0   150.0   200.0   250.0   300.0  350.0  400.0  450.0  500.0
Min:   11.52   Qj:  54.29   Q2:  101.33   Q3:  225.98  Q4: 445.21    Max: 2676.16
Median:   152.41
Mean:     293.23
Std Dev.: 334.98
   1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0
      0.0   50.0    100.0   150.0   200.0   250.0  300.0  350.0  400.0   450.0   500.0
Min:   11.52   Q^  106.12  Q2:  187.44   Q3:  371.21   Q4: 696.14   Max:  2676.16


Median: 252.96
Figure 9-111.  Population Estimates, Magnesium (MG16), Region 2.
                                      306

-------
 VARIABLE: MAGNESIUM AS UEQ/L FOR LAKES s.2000 HA

 Population Size (N): 258    SE(N): 20.5        Sample Size: 94
 Lake Area (A):  24272      SE(A): 4795
16 FEB 1986
    o.o .
       0.0    50.0   100.0   150.0   200.0   250.0   300.0   350.0  400.0  450.0  500.0
 Min:  18.92   Q^ 44.34   Q2: 69.06   Q3:  85.73    Q4: 116.99    Max: 350.43


 Median:   76.10
 Mean:    87.19
 Std. Dev.: 50.40
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0
       0.0   50.0   100.0   150.0  200.0  250.0   300.0   350.0   400.0   450.0   500.0
Min:   18.92   Qj: 36.64   Q2:  47.66    Q3:  86.02   Q4: 87.77    Max: 350.43


Median: 63.15
Figure 9-112.  Population Estimates, Magnesium (MG16), Subregion 3A.
                                      307

-------
VARIABLE: MAGNESIUM AS UEQ/L FOR LAKES *2000 HA

Population Size (N): 2098  SE(N): 212.6       Sample Size: 148
Lake Area (A):  66169      SE(A): 10158
    1.0
16 FEB 1986
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
                _ i
       0.0   50.0    100.0   150.0   200.0   250.0   300.0   350.0   400.0   450.0  500.0
Min:  14.89   Qj:  55.80   Q2: 102.87  Q3: 200.53  Q4: 494.50   Max: 2447.23
Median:   159.88
Mean:     292.87
Std. Dev.: 371.83
    1.0-
   0.8-


   0.6-
000
   0.4-


   0.2-
   0.0-
      0.0   50.0    100.0   150.0   200.0   250.0   300.0   350.0  400.0  450.0   500.0
Min:   14.89   (ty  55.88   Q2: 150.46  Q^:  210.83   Q4: 466.96   Max: 2447.23


Median:  153.84
Figure 9-113.  Population Estimates, Magnesium (MG16), Subregion 3B.
                                       308

-------
  VARIABLE: MANGANESE IN UG/L FOR LAKES s.2000 HA
                                                                16 FEB 1986
Population Size (N): 7096   SE(N):  165.3
Lake Area (A):  427864     SE(A): 36414
                                              Sample Size:  763
    o.o
        0.0   20.0    40.0    60.0    80.0   100.0   120.0   140.0   160^0   180.0   200.0
 Min:   0.00   QI:  1.67     Q2: 8.73     Q3:  18.08    Q4: 41.45 '    Max: 1191.00
 Median:   11.80
 Mean:     37.47
 Std. Dev.:  74.36
    1.0
    o.s
    0.6-
    0.4-
   0.2-
   0.0-
       0.0   20.0   40.0    60.0    80.0    100.0   120.0   140.0   160.0   180^0   200.0
Min:  0.00   QI: 3.00    Q2: 5.89     Q3:  9.94    Q4: 25.00    Max:  1191.00


Median: 8.54
Figure 9-114.  Population Estimates,  Manganese (MN11), Region 1.
                                     309

-------
VARIABLE: MANGANESE IN UG/L  FOR LAKES s.2000 HA
                    16 FEB 1986
Population Size (N):  8501  SE(N):  315.5
Lake Area (A):  501457     SE(A):  73306
Sample Size:  587
   0.0
      0.0   20.0    40.0    60.0   80.0   100.0   120.0   140.0   160.0   180.0   200.0
Min:  0.00   Q^  3.18     Q2: 6.36    Q3:  9.55     Q4: 24.27    Max: 470.00
Median:   7.95
Mean:     12.78
Std. Dev.:  33.35
   o.o
      0.0   20.0    40.0    60.0   80.0   100.0   120.0   140.0   160.0   180.0   200.0
Min:  0.00   Qj: 2.71     Q2: 5.41     Q3:  8.12     Q4: 12.76    Max:  470.00
Median: 6.77
Figure 9-115.  Population Estimates, Manganese (MN11), Region 2.
                                     310

-------
 VARIABLE: MANGANESE IN UG/L FOR LAKES s.2000 HA

 Population Size (N): 258   SE(N): 20.5        Sample Size: 94
 Lake Area (A):  24272     SE(A): 4795
     1.0
    0.8
    0.6-
    0.4-
    0.2-
    0.0-
                                     X ^
16 FEB 1986
       0.0    20.0    40.0    60.0   80.0   100.0   120.0   140.0   160.0   180.0  200.0
 Min:  0.00    Qv- 8.55     Q2: 38.67   Q3:  74.42    Q4: 156.46   Max: 2030.00
 Median:   52.65
 Mean:    131.86
 Std. Dev.: 289.39
    1.0
   0.8-


   0.6-

1-GOO

   0.4-


   0.2-
   0.0-
       0.0   20.0    40.0    60.0    80.0   100.0   120.0   140.0   160.0   180.0   200.0
Min:   0.00   QI:  5.27     Q2: 29.91    Q3: 58.81    Q4: 159.30   Max: 2030.00
Median: 53.26
Figure 9-116.  Population Estimates, Manganese (MN11), Subregion 3A.
                                       311

-------
VARIABLE: MANGANESE IN UG/L FOR LAKES *.2000 HA

Population Size (N): 2098  SE(N):  212.6        Sample Size:  148
Lake Area (A):  66169      SE(A): 10158
                                                                 16 FEB 1986
    i.o-
   0.8-
   0.6-
   0.4-
   0.2-
   o.o-
       0.0   20.0   40.0   60.0   80.0   100.0   120.0   140.0   160.0   180.0   200.0
Min:  0.00   C^: 2.00     Q2:  2.86    Q3:  5.59     Q4: 16.01     Max:  149.00
Median:   4.16
Mean:     12.10
Std. Dev.: 22.48
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0   20.0    40.0    60.0    80.0    100.0   120.0   140.0   160.0   180.0   200.0
Min:   0.00   Q^  0.92    Q2: 2.69     03:  3.16     Q4: 12.62     Max:  149.00


Median: 2.85
Figure 9-117.  Population Estimates, Manganese (MN11), Subregion 3B.
                                     312

-------
 VARIABLE: NITRATE AS UEQ/L FOR LAKES ^2000 HA
                    16 FEB 1986
 Population Size (N): 7096   SE(N):  165.3
 Lake Area (A):  4-27864     SE(A): 36414
Sample Size: 763
    o.o
       0.0    1.0     2.0     3.0    4.0     5,0     6.0     7.0     8.0     9.0     10.0
 Min:  0.00    Qj: 0.06    Q2: 0.27    Q3: 0.66     Q4: 2.25     Max: 58.87
 Median:    0.42
 Mean:     2.49
 Std. Dev.:  6.36
    1.0
   0.8
   0.6-
   0.4-
   0.2-
   0.0-
       0-0    1.0     2.0     3.0    4.0    5.0    6.0    7.0     8.0    9.0    10.0
Min:   0.00   Qj: 0.01    Q2: 0.20     Q3:  0.67    Q4: 2.44      Max:  58.87


Median: 0.41
Figure 9-118.  Population Estimates, Nitrate (N0316), Region 1.
                                    313

-------
VARIABLE: NITRATE AS UEQ/L  FOR LAKES *.2000 HA
                    16 FEB 1986
Population Size (N): 8501  SE(N):  315.5
Lake Area (A):  501457     SE(A):  73306
Sample Size:  587
   o.o
       0.0    1.0     2.0     3.0     4.0     5.0     6.0     7.0     8.0     9.0     10.0
Min:  0.00   Q^ 0.43     Q2: 0.45    Q3:  1.24      Q4: 3.38     Max:  81.46
Median:   0.71
Mean:     2.15
Std. Dev.: 4.13
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
       0.0    1.0     2.0     3.0     4.0     5.0     6.0     7.0     8.0     9.0    10.0
Min:   0.00   Q^ 0.17    Q2:  0.43    Qj:  1.97     04.: 3.83     Max: 81.46
Median: 0.89
Figure 9-119.  Population Estimates, Nitrate (N0316), Region 2.
                                     314

-------
 VARIABLE: NITRATE AS UEQ/L FOR LAKES s.2000 HA

 Population Size (N): 258    SE(N): 20.5        Sample Size: 94
 Lake Area (A):   24272      SE(A): 4795
16 FEB 1986
    1.0
    0.6-
    0.4-
    0.2-
    0.0-
       0.0    1.0     2.0     3.0    4.0     5.0     6.0     7.0     8.0     9.0     10.0
Min:  0.00   Q^ 0.63    Q2: 2.13    Q3: 3.95     Q4: 9.98     Max:  153.28


Median:   3.09
Mean:     9.27
Std. Dev.: 22.00
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
       0.0    1.0     2.0     3.0     4.0     5.0     6.0     7.0    8.0    9.0    10.0
Min:   0.00   Qj: 0.87     Q2:  1.80    Qj:  5.08    Q4: 8.87      Max:  153.28


Median: 3.01
Figure 9-120.  Population Estimates, Nitrate (N0316), Subregion 3A.
                                       315

-------
   VARIABLE: NITRATE AS UEQ/L FOR LAKES ^2000 HA

   Population Size (N): 2098  SE(N):  212.6        Sample Size: 148
   Lake Area (A):  66169      SE(A):  10158
16 FEB 1986
    0.0
        Ol    1'    2'    3'     4>'     5.0    6.0    M    9^    ^0
 Min:  0.00   QI:  0.05    Q2: 0.67    Q3:  1.67     Q4: 5.69
 Median:   1.00
 Mean:     5.31
 Std. Dev.:  16.56
Min:   0.00   Q,:  0.00    Q2: 0.35    Q3:  1.49     Q4: 6.48      Max:  493.58
Median: 0.98
Figure  9-121. Population Estimates, Nitrate (N0316), Subregion 3B.
                                   316

-------
  VARIABLE: PH FOR LAKES^.2000 HA
     Xcl: 5.0
                                              16 FEB 1986
Xc2: 5.5
Xc3: 6.0
  Population Size (N): 7096  SE(N):  165.3
  Lake Area (A):  427864    SE(A):  36414
                           Sample Size:  763
    o.o-
       4.0    4.5     5.0     5.5    6.0     6.5
 Min:  4.32   QI: 6.33    Q2: 6.74    Q3:  6.97
                                    7.5
                                 Q4: 7.26
                                   8.5     9.0
                                Max:  9.36
 Median:   6.87
 Mean:    6.76
 Std. Dev.: 0.74
PROPORTIONS AND NUMBERS BELOW THE
Pcl: 0.034 Nc1: 240 Ncul: 315
Pc2: 0.086 Nc2:613 Ncu2: 737
Pc3: 0.129 Nc3:916 Ncu3: 1056
VALUE OF Xc
   0.0
      4-    4-5     5.0     5.5    6.0    6.5     7.0     7.5    8.0    8.5     9.0
Min:   4.32   QI: 6.58    Q2:  6.87     Q3: 7.09     Q4: 7.37      Max:  9.36
Median: 6.94
   PROPORTIONS AND AREA BELOW THE VALUE OF Xc
   Gcl:  0.012    Ac1: 5059      Acu1:  7570
       :  0.043   Ac2: 18195      Acu2: 26393
       :  0.060   Ac3: 25800     Acu3: 34478
Figure  9-122.  Population Estimates,  pH (PHSTVL), Region 1.
                                   317

-------
 VARIABLE: PH FOR LAKESs.2000 HA
    Xc1:  5.0      Xc2: 5.5       Xc3: 6.0
 Population Size (N): 1290   SE(N): 47.6
 Lake Area (A):  118776      SE(A): 22186
                                                               16 FEB 1986
                                            Sample Size: 155
    1.0
    0.8-
    0.6-
 F(X)
    0.4-
    0.2-
    0.0-
                                    _ r
                   ^ / 
       4.0    4.5     5.0    5.5    6.0     6.5    7.0    7.5     8.0    8.5    9.0
 Min:  4.36   Qj: 5.48    Q2: 6.41     Q3:  6.87    Q4: 7.14      Max:  9.36
 Median:   6.71
 Mean:    6.45
 Std. Dev.: 0.93
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF X(
                     Pc1: 0.100   Nc1: 128     Ncu1: 179
                    Pc2: 0.199   Nc2:256     Ncu2: 324
                        ;: 0.266   Nc3:343     Ncu3: 418
      4.0    4.5     5.0     5.5    6.0    6.5     7.0    7.5
Min:  4.36   Qj: 6.28    Q2:  6.81     Q3:  6.95    Q4: 7.36
                                                           8.0     8.5     9.0
                                                              Max:  9.36
Median: 6.87
                     PROPORTIONS AND APTA BELOW THE VALUE OF Xc
Gcl:  0.017    Ac1:  1962
Gc2:  0.072    Ac2:  8530
Gc3:  0.104    Ac3:  12375
                                                   cul:
                                                        2977
                                                  Acu2: 15507
                                                  Acu3:
Figure 9-123.  Population Estimates, pH (PHSTVL), Subregion 1A.
                                    318

-------
  VARIABLE: PH FOR LAKES^.2000 HA
     Xc1: 5.0      Xc2: 5.5       Xc3: 6.0
  Population Size (N): 1479   SE(N):  92.9
  Lake Area (A):  26872      SE(A): 2913
                                                   16 FEB 1986
                                Sample Size: 143
   0.0
      4.0
Min:  4.49
4.5
                    5.0
                  6.64
              5.5     6.0    6.5
            Q2:  6.90    Q3:  7.10
                       9.0
Q4: 7.36     Max: 8.47
 Median:    7.02
 Mean:     6.96
 Std. Dev.:  0.68
PROPORTIONS AND NUMBERS BELOW THE
Pc1: 0.008 Ncl: 13 Ncu1: 20
Pc2: 0.057 Nc2:84 Ncu2: 147
Pc3: 0.078 Nc3:116 Ncu3: 179
VALUE OF Xc
Min:
Median: 6.89
             5.5     6.0     6.5
            Q2:  6.85    Q^:  6.99
                                                                          9.0
                                                   Q4: 7.14      Max: 8.47
PROPORTIONS AND
GcV
Gc2:
GC3:
0.019
0.116
0.141
Ac1:
Ac2:
Ac3:
AREA BELOW THE VALUE OF Xc
513
3115
3793
A
Acu2:
Acu3:
847
6073
6779
Figure 9-124.  Population Estimates,  pH (PHSTVL), Subregion IB.
                                     319

-------
VARIABLE: PH FOR LAKESs.2000 HA
   Xc1:  5.0      Xc2: 5.5      Xc3:  6.0
Population Size (N): 1483  SE(N):  57.5
Lake Area (A):  72412     SE(A):  12013
                                                              16 FEB 1986
                                           Sample Size: 163
   o.o
      4.0    4.5     5.0    5.5     6.0     6.5    7.0     7.5    8.0    6.5
Min:  4.45   QJ: 6.30    Q2: 6.60    Q3:  6.89    Q4: 7.30     Max:  8.47
                                                                        9.0
Median:   6.77
Mean:     6.76
Std. Dev.:  0.74
                    PROPORTIONS AND NUMBERS BELOW THE VALUE OF X(
                    Pcl: 0.017   Ncl: 25      Ncu1: 46
                    Pc2: 0.078   Nc2:115      Ncu2: 166
                    Pc3: 0.129   Nc3:191      Ncu3: 254
   0.0
      4.0    4.5     5.0    5.5    6.0     6.5    7.0     7.5     8.0    8.5     9.0
Min:  4.45   Qj: 6.52    Q2: 6.67    Q3:  6.90    Q4: 7.43     Max:  8.47
Median:  6.86
                    PROPORTION^ AND ARFA BELOW THE VALUE OF X(
                    Gc1: 0.003   Ac1:  194       Acul:  372
                    Gc2: 0.042   Ac2:  3059      Acu2: 5074
                    Gc3: 0.065   Ac3:  4713      Acu3: 7298
Figure  9-125.  Population Estimates, pH (PHSTVL), Subregion 1C.
                                    320

-------
 VARIABLE: PH FOR LAKESs.2000 HA
                                               16 FEB 1986
    Xc1:  5.0
Xc2: 5.5
 Population Size (N): 1318
 Lake Area (A):  36403
     Xc3:
SE(N):  93.7
SE(A):  4381
                            Sample Size: 126
    o.o
       4.0    4.5     5.0     5.5     6.0    6.5     7.0     7.5     8.0    8.5    9.0
 Min:  4.50   Qj: 6.21     Q2:  6.68    Q3: 6.88     Q4: 7.14      Max:  7.82
 Median:   6.81
 Mean:    6.65
 Std. Dev.: 0.70
     PROPORTIONS AND NUMBERS BELOW THE VALUE OF X(
    Pc1: 0.050  Nc1: 66      Ncu1: 114
    Pc2: 0.100  Nc2:132     Ncu2: 195
    Pc3: 0.146  Nc3:192     Ncu3: 261
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0
      4.0    4.5    5.0    5.5     6.0     6.5     7.0    7.5     8.0     8.5     9.0
Min:   4.50    Q}:  6.46     Q2: 6.78    Q3:  6.98    Q4: 7.27     Max: 7.82
Median: 6.85
PROPORTIONS
Gc1: 0.063
Gc2: 0.091
Gc3: 0.110
AND
Ac1:
Ac2:
AREA BELOW THE
2295 Acu1:
3296 Acu2
3988 Acu3
VALUE OF
4555
5680
: 6400
xc
Figure 9-126.  Population Estimates, pH (PHSTVL), Subregion ID.
                                     321

-------
 VARIABLE: PH FOR LAKES^.2000 HA
    Xc1:  5.0      Xc2: 5.5       Xc3: 6.0
 Population Size (isl): 1526   SE(N):  66.0
 Lake Area (A):  173400     SE(A): 25725
                                           16 FEB 1986
                        Sample Size: 176
    1.0
    0.8-
    0.6-
 F(X)
    0.4-
    0.2-
    0.0-
       4.0    4.5     5.0    5.5     6.0     6.5     7.0    7.5     8.0     8.5    9.0
 Min:  4.32   Qj: 6.57    Q2: 6.80    Q3:  7.03    Q4: 7.31     Max: 8.36
 Median:   6.91
 Mean:    6.91
 Std. Dev.: 0.52
 PROPORTIONS AND NUMBERS BELOW THE VALUE OF X(
Pc1: 0.005   Nc1: 8       Ncu1: 21
Pc2: 0.016   Nc2:25      Ncu2: 47
Pc3: 0.048   Nc3:74      Ncu3: 111
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0
      4.0    4.5    5.0     5.5     6.0    6.5     7.0     7.5    8.0    8.5     9.0
Min:  4.32   Qj: 6.72     Q2:  7.03    Q3: 7.14     Q4: 7.38     Max:  8.36
Median: 7.11
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gc1:  0.001   Ac1: 95         Acu1:  242
Gc2:  0.001   Ac2: 196        Acu2: 380
Gc3:  0.005   Ac3: 932       Acu3: 1484
Figure 9-127.  Population Estimates,  pH (PHSTVL), Subregion 1E
                                    322

-------
 VARIABLE: PH FOR LAKESs.2000 HA
    Xc1:  5.0     Xc2: 5.5      Xc3: 6.0
 Population Size (N): 8501  SE(N):  315.5
 Lake Area (A):  501457    SE(A): 73306
                                                             16 FEB 1986
                                          Sample Size: 587
    o.o
       4.0
                                                                        9.0
Min:  4.43   C^: 6.40     Q2:  6.95
:  7.38    Q4: 7.86
                                                              Max:  8.69
 Median:   7.09
 Mean:     7.09
 Std. Dev.: 0.82
                     PROPORTIONS AND NUMBERS BELOW THE VALUE OF X,
                    Pcl: 0.015  Ncl:  130
                   Pc2: 0.036  Nc2:309
                       : 0.096  Nc3:818
     Ncu1: 189
     Ncu2: 390
         : 1037
    1.0
   0.8-


   0.6-

GOO

   0.4-


   0.2-
   0.0-
      4-0    4.5     5.0    5.5     6.0    6.5     7.0    7.5     8.0    8.5    9.0
Min:  4.43   Qj: 7.04    Q2: 7.35    Q3: 7.63    Q4: 7.98     Max:  8.69
Median:  7.44
                    PROPORTIONS AND AREA BELOW THE VALUE OF Xc
                    Gc1:  0.002   Ac1:  1064      Acu1:  1553
                   Gc2:  0.006  Ac2:  3055      Acu2: 3942
                      ;:  0.021   Ac5:  10399     Acu3: 13686
Figure  9-128.  Population Estimates, pH (PHSTVL), Region 2.
                                    323

-------
 VARIABLE: PH FOR LAKESs.2000 HA
                                                      16 FEB 1986
    Xc1: 5.0
      Xc2: 5.5
                                    6.0
 Population Size (N): 1457   SE(N):  74.3
 Lake Area (A):  142979     SE(A): 37582
                                  Sample Size: 147
    1.0
    0.8-
    0.6-
 F(X)
    0.4-
    0.2-
   0.0
       4.0    4.5     5.0     5.5    6.0    6.5     7.0     7.5     8.0     8.5    9.0
Min:  5.57   Q,: 6.57    Q2: 6.85     Q3: 6.99     Q4: 7.34     Max: 8.53
Median:
Mean:
Std. Dev.:
6.94
6.94
0.43
PROPORTIONS AND NUMBERS BELOW THE VALUE
Pcl: 0.000 Nc1: 0 Ncu1: **
Pc2: 0.000 Nc2:0 Ncu2: **
Pc5: 0.014 Nc3:20 Ncu3: 43
OFXC
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0
      4.0
Min:  5.57


Median:  7.05

 *+ Not Defined
             4.5    5.0    5.5     6.0     6.5     7.0     7.5    8.0    8.5     9.0
             Q^  6.91     Q2: 7.05    Q^:  7.15      Q4: 7.34      Max:  8.53
                     PROPORTIONS AND AREA BELOW THE VALUE OF X,
                     Gc1:  0.000   Ac1: 0
                     Gc2:  0.000   Ac2: 0
                     Gc3:  0.002   Ac3: 255
                                         Acu1:  **
                                         Acu2:  **
                                         Acu3: 508
Figure 9-129.  Population Estimates, pH (PHSTVL), Subregion 2A.
                                      324

-------
  VARIABLE: PH FOR LAKES
-------
VARIABLE: PH  FOR LAKESs.2000 HA
                                           16 FEB 1986
   Xcl: 5.0
Xc2: 5.5
                6.0
Population Size (N): 1480  SE(N): 48.8
Lake Area (A):  97556     SE(A): 21357
                       Sample Size:  153
    1.0
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0-
      4.0    4.5    5.0    5.5     6.0     6.5    7.0     7.5     8.0     8.5    9.0
Min:  4.74    Qj:  5.80    Q2: 6.28    Qy  7.01     Q4: 7.52      Max: 8.05
Median:   6.68
Mean:     6.62
Std. Dev.: 0.85
 PROPORTIONS AND NUMBERS BELOW THE VALUE OF X(
Pcl: 0.021   Ncl: 31      Ncul: 55
Pc2: 0.111    Nc2:164     Ncu2: 216
    : 0.277   N^:411      ISLM-z: 489
    1.0
   0.6-

GOO
   0.4-
   0.2-
   0.0
      4.0    4.5    5.0     5.5     6.0     6.5    7.0     7.5     8.0    8.5     9.0
Min:  4.74   Qj: 7.19     Q2: 7.52     Qj:  7.57     Q4: 7.69      Max:  8.05
Median:  7.56
                     PROPORTIONS AND AREA BELOW THE VALUE OF X
 Gc1:  0.003    Ac1:  252
 Gc2:  0.018   Ac2:  1765
    C  0.064   A^z:  6276
                                  Acu1:  468
                                  Acu2: 2424
                                  Acu3: 8128
Figure 9-131.  Population Estimates, pH (PHSTVL), Subregion 2C.
                                     326

-------
 VARIABLE: PH FOR LAKESs.2000 HA
    Xcl: 5.0     Xc2: 5.5       Xc3: 6.0
 Population Size (N): 4515   SE(N): 293.9
 Lake Area (A):  226896    SE(A): 58202
                                                               16 FEB 1986
                                            Sample Size:  141
    o.o
       4-    4-5     5.0     5.5    6.0     6.5     7.0    7.5     8.0    8.5     9.0
 Min:  5.38   QI: 6.63    Q2: 7.14     Q3:  7.51     Q4: 8.07     Max:  8.69
 Median:   7.39
 Mean:    7.33
 Std. Dev.: 0.76
                                             N
 PROPORTIONS AND NUMBERS BELOW THE VALUE OF X,
 Pc1: 0.000   Ncl: 0
Pc2: 0.001   Nc2:3
 Pc3: 0.045   Nc3:202    Ncu3: 393
                                              cu1:
    1.0
    0.8
   0.6
 G(X)

   0.4-
   0.2-
   0.0
      4.0    4.5     5.0
Min:  5.38   Qj: 7.32
                          5.5    6.0     6.5     7.0    7.5     8.0     8.5    9.0
                        Q2: 7.53     Q3:  7.98    Q4: 8.07     Max: 8.69
Median: 7.97
 ** Not Defined
PROPORTIONS AND AREA BELOW THE VALUE OF X(
Gcl:  0.000   Ac1:  0
Gc2:  0.000   Ac2:  24
Gc3:  0.010    Ac3:  2273
                                                 Acu1: **
                                                 Acu2: 42
                                                 Acu3: 4907
Figure  9-132.  Population Estimates,  pH (PHSTVL), Subregion 2D.
                                    327

-------
 VARIABLE: PH FOR LAKESs.2000 HA
                                                     16 FEB 1986
    Xcl:  5.0
         5.5
 Population Size (N): 258
 Lake Area (A):  24272
      Xc3: 6.0
SE(N): 20.5
SE(A): 4795
                                 Sample Size: 94
    1.0
    0.8-
    0.6-
 F(X)
    0.4-
    0.2-
    0.0-
       4.0    4.5    5.0     5.5     6.0     6.5     7.0     7.5     8.0     6.5     9.0
 Min:  5.90    Qj:  6.73    Q2:  6.92    Q3:  7.08     Q4: 7.29      Max:  8.27
 Median:    6.98
 Mean:     7.01
 Std. Dev.:  0.37
PROPORTIONS AND NUMBERS BELOW THE
Pcl: 0.000 Nc1: 0 Ncu1: **
Pc2: 0.000 Nc2:0 Ncu2: **
Pc3: 0.004 Nc3:1 Ncu3: 2
VALUE OF Xc
    1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
       4.0
Min:   5.90


Median: 6.92
4.5     5.0     5.5     6.0    6.5     7.0     7.5     8.0     8.5     9.0
Qj: 6.76     Q2: 6.82     Q3:  6.93    Q4: 7.11      Max:  8.27
 <*  Not Defined
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
Gs\
C']'
Gc2: 0
Gc3: 0
.000
.000
.001
Ac1:
Ac2:
Ac3:
0
0
13
Acu1:
Acu2:
Acu3:
**
**
18
Figure 9-133.  Population Estimates, pH (PHSTVL), Subregion 3A.
                                      328

-------
  VARIABLE: PH FOR LAKES^.2000 HA
     Xcl:  5.0
                                                                  16 FEB 1986
                  Xc2: 5.5
(c3:
  Population Size (N): 2098  SE(N): 212.6
  Lake Area (A):  66169     SE(A): 10158
6.0
                                              Sample Size:  148
    0.0
        4-    *-5     5.0     5.5     6.0     6.5     7.0     7.5    8.0    8.5    9.0
 Min:   3.81    QI: 5.38    Q2:  6.37    Q3:  6.84    Q4: 7.41      Max:  8.96
 Median:   6.56
 Mean:     6.45
 Std. Dev.: 1.03
PROPORTIONS AND NUMBERS BELOW THE
Pcl: 0.124 Nc1: 259 Ncu1: 385
Pc2: 0.206 Nc2:433 Ncu2: 574
Pc3: 0.327 Nc3:687 Ncu3: 878
VALUE OF Xc
   0.0
      *-0    4.5     5.0    5.5    6.0    6.5
Min:  3.81    Qj:  5.36    Q2: 6.41     Q3:  6.81
Median: 6.76
                                                              8.0     8.5     9.0
                                                   Q4:  7.47      Max: 8.96
PROPORTIONS AND AREA BELOW THE VALUE OF Xc
ccr
^c2:
GC3'
0.120
0.235
0.327
Ad:
Ac2:
Ac3:
7936
15553
21635
Acu1:
Acu2:
Acu3:
12666
21925
28889
Figure 9-134.  Population Estimates, pH (PHSTVL), Subregion 3B.
                                      329

-------
VARIABLE: PHOSPHORUS AS UG/L  FOR LAKES 1.2000 HA
                                                                16 FEB 1986
Population Size (N): 7096  SE(N):  165.3
Lake Area (A):  427864     SE(A): 36414
                                            Sample Size: 763
   1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
       0.0    5.0     10.0    15.0   20.0   25.0   30.0   35.0   40.0   45.0   50.0
Min:  0.00   Q}: 4.01     Q2: 7.24     Q3:  11.42     Q4: 20.64    Max:  376.40
Median:   9.04
Mean:    15.44
Std. Dev.: 22.56
    1.0-
   0.8-
   0.6-
    0.4-
    0.2-
   o.o-
      0.0    5.0    10.0
Min:   0.00   Qi: 2.30
                           15.0    20.0    25.0   30.0    35.0    40.0    45.0    50.0
                           ^ 4.21     03:  6.97     Q4: 12.55     Max:  376.40
 Median:  6.20
 Figure  9-135. Population Estimates, Phosphorus (PTL11), Region 1.
                                         330

-------
 VARIABLE: PHOSPHORUS AS UGA  FOR LAKES *.2000 HA
                    16 FEB 1986
 Population Size (N): 8501   SE(N):  315.5
 Lake Area (A):  501457     SE(A): 73306
Sample Size:  587
       0.0   5.0    10.0    15.0    20.0   25.0    30.0    35.0    4-0.0    45.0    50.0
    0.0
 Min:  0.00   Qj:  8.24     Q2: 13.54   Q3:  18.61    Q4: 26.32     Max:  146.00
 Median:    16.57
 Mean:     20.33
 Std. Dev.:  18.76
       0.0    5.0    10.0    15.0    20.0    25.0   30.0   35.0    40^045^050.0
   0.0
Min:   0.00   QI: 7.77     Q2: 14.62   Q3: 19.44-    Q4: 26.62     Max: 146.00
Median: 17.85
Figure 9-136. Population Estimates, Phosphorus (PTL11), Region 2.
                                      331

-------
VARIABLE: PHOSPHORUS AS UG/L FOR LAKES 1.2000 HA

Population Size (N): 258   SE(N): 20.5        Sample Size:  94
Lake Area (A):  24-272      SE(A): 4795
16 FEB 1986
   1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
       0.0    5.0    10.0    15.0    20.0    25.0    30.0    35.0    40.0    45.0    50.0
Min:   0.00   Q^ 3.00    Q2: 5.51     Qj:  9.53    Q4: 14.80     Max: 833.00


Median:   6.97
Mean:     27.56
Std. Dev.: 113.23
   1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
      0.0    5.0    10.0    15.0    20.0    25.0    30.0    35.0    40.0   45.0   50.0
Min:   0.00   Qj:  1.58     Q2: 3.00    03:  4.16     04: 13.27    Max:  833.00


Median:  3.19
Figure 9-137.  Population Estimates. Phosphorus (PTL11), Subregion 3A.
                                    332

-------
 VARIABLE: PHOSPHORUS AS UGA FOR LAKES *.2000 HA

 Population Size (N): 2098   SE(N): 212.6       Sample Size: 148
 Lake Area (A):   66169      SE(A): 10158
16 FEB 1986
    1.0-
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
       0.0    5.0     10.0    15.0    20.0    25.0   30.0    35.0   4-0.0   45.0    50.0
 Min:  0.00   Q}: 6.76     Q2: 10.65   Q3: 14.33    Q4: 25.76    Max: 495.00


 Median:   12.38
 Mean:    29.82
 Std. Dev.: 59.86
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0    5.0    10.0    15.0    20.0    25.0    30.0    35.0    40.0    45.0    50.0
Min:   0.00   Q^ 7.22    Q2: 8.88    Q3:  12.29    04.: 20.33    Max: 495.00


Median: 10.61
Figure 9-138.  Population Estimates/ Phosphorus (PTL11), Subregion 3B.
                                       333

-------
VARIABLE: POTASSIUM AS UEQA FOR LAKES *.2000 HA
                    16 FEB 1986
Population Size (N): 7096  SE(N):  165.3
Lake Area (A):  427864    SE(A): 36414
Sample Size:  763
   o.o
       0.0    10.0   20.0   30.0    40.0    50.0    60.0    70.0    80.0    90.0   100.0
Min:  0.15    Qj: 7.42    Q2: 10.13    Q^:  15.06   Q4: 24.91     Max: 149.84
Median:   12.15
Mean:     18.60
Std. Dev.: 19.06
   o.o
      0.0   10.0    20.0    30.0    40.0    50.0    60.0    70.0    80.0   90.0   100.0
Min:  0.15    Qj:  7.74     Q2: 9.50     Q3:  11.03    Q4: 16.47    Max:  149.84


Median: 10.35
Figure 9-139. Population Estimates, Potassium (K16), Region 1.
                                    334

-------
VARIABLE: POTASSIUM AS UEQ/L FOR LAKES s.2000 HA
                    16 FEB 1986
Population Size (N): 8501  SE(N):  315.5
Lake Area (A):  501457     SE(A):  73306
Sample Size: 587
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0    10.0   20.0   30.0   40.0   50.0   60.0   70.0   80.0   90.0   100.0
Min:  2.30   Qj: 10.22    Q2:  14.83   Qj:  17.96     Q4: 25.42    Max:  165.18
Median:   16.31
Mean:     20.03
Std. Dev.: 15.59
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0   10.0    20.0    30.0    40.0    50.0    60.0    70.0    80.0    90.0    100.0
Min:   2.30   Q^  10.54   Q2: 14.32    Q3:  18.47    Q4: 25.25    Max: 165.18
Median: 16.26
Figure 9-140.  Population Estimates. Potassium (K16), Region 2.
                                        335

-------
 VARIABLE: POTASSIUM AS UEQ/L FOR LAKES *.2000 HA

 Population Size (N): 258   SE(N):  20.5        Sample Size:  94
 Lake Area (A):  24272      SE(A):  4795
     1.0
    0.8-
    0.8-
    0.4-
    0.2-
    0.0-
                                        V ^
16 FEB 1986
       0.0   10.0    20.0    30.0    40.0    50.0    60.0    70.0    80.0    90.0   100.0
 Min:  3.84    QI:  20.97   Q2: 32.12    Q3:  43.46   Q4: 57.56     Max:  117.11
 Median:    39.39
 Mean:     40.50
 Std. Dev.:  21.38
   o.o
       0.0    10.0   20.0   30.0   40.0    50.0    60.0    70.0    80.0    90.0    100.0
Min:   3.84   QI: 15.44    Q2:  28.83   Q3:  32.01   Q4: 45.08    Max: 117.11


Median: 30.11
Figure 9-141.  Population Estimates. Potassium (K16), Subregion 3A.
                                    336

-------
VARIABLE: POTASSIUM AS UEQ/L FOR LAKES s.2000 HA

Population Size (N): 2098  SE(N): 212.6       Sample Size: 148
Lake Area (A): 66169     SE(A): 10158
                                                                 16 FEB 1986
     1.0
    0.8
    0.8-
 1-F(X)
    0.4-
    0.2-
    0.0
       0.0   10.0    20.0    30.0    40.0    50.0   60.0   70.0   80.0    90.0    100.0
 Min:  0.10    QI:  4.62     Q2: 13.34    Q3: 56.10    Q4: 139.62   Max: 638.74

 Median:    21.60
 Mean:     75.28
 Std. Dev.:  104.40
   o.o
       0.0
             10.0
                   20.0
                          30.0    40.0    50.0    60.0    70.0   80.0   90.0   100.0
Min:   0.10    QJ: 6.78    Q2: 24.92    Q3:  60.40   Q4: 138.89   Max:  638.74

Median: 54.66
Rgure 9-142. Population Estimates, Potassium (K16), Subregion 3B.
                                     337

-------
VARIABLE: SECCHI TRANSP. IN M  FOR LAKES s.2000 HA
                    16 FEB 1986
Population Size (N): 7095  SE(N):  166.2
Lake Area (A):  431126     SE(A): 36854
Sample Size:  760
   1.0-
   0.8-
   0.6-
F(X)
   0.4-
   0.2-
   0.0
       0.0      1.0      2.0       3.0       4.0      5.0       6.0       7.0      8.0
Min:   0.25    (ty 1.20     Q2:  1.87     Q3:  2.62    Q4: 4.02      Max: 11.45
Median:   2.27
Mean:     2.72
Std. Dev.: 1.75
   1.0
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
      0.0      1.0       2.0       3.0      4.0      5.0       6.0      7.0      8.0
Min:   0.25    Q^  2.00    02: 2.86     Q^:  3.90    Q^.: 5.18      Max: 11.45
Median: 3.08
Figure 9-143. Population Estimates, Secchi Disk Transparency (SECMEAN), Region 1.
                                     338

-------
 VARIABLE: SECCHI TRANSP. IN M FOR LAKES s.2000 HA

 Population Size (N): 8501   SE(N):  315.4        Sample Size:  586
 Lake Area (A):  501476     SE(A):  73306
    1.0
    0.8
    0.6-
 F(X)
    0.4-
    0.2-
    0.0-
                          16 FEB 1986
       0.0      1.0       2.0      3.0      4.0       5.0       6.0      7.0       8.0
 Min:  0.35    Qj: 1.03     Q2: 1.52     Q3: 2.24     Q4: 3.29     Max: 9.05
 Median:   1.90
 Mean:    2.25
 Std. Dev.: 1.43
    1.0
   0.8-
   0.6-
G(X)
   0.4-
   0.2-
   0.0-
       0.0      1.0      2.0       3.0
Min:   0.35   QJ: 1.09     Q2: 1.80


Median: 2.01
 4.0      5.0      6.0       7.0      8.0
5:  2.57     Q4: 3.41      Max: 9.05
Figure 9-144. Population Estimates, Secchi Disk Transparency (SECMEAN), Region 2.
                                       339

-------
 VARIABLE: SECCHI TRANSP. IN M FOR LAKES s.2000 HA

 Population Size (N): 258   SE(N):  20.6        Sample Size:  93
 Lake Area (A):  24355      SE(A):  4800
    1.0
                           16 FEB 1986
       0.0      1.0      2.0       3.0      4.0      5.0       6.0
 Min:  0.35   Qj: 0.94    Q2:  1.52     Q3:  2.02    Q4: 2.74

 Median:   1.78
 Mean:     1.99
 Std. Dev.: 1.05
    1.0
   0.8-
   0.61
G(X)
   0.4-
   0.2-
   0.0-
      0.0     1.0       2.0      3.0
Min:   0.35    Qj: 1.40     Q2: 1.54 .

Median:  1.73
   4.0      5.0       6.0
03:  2.18     Q4: 3.13
                             7.0       8.0
                           Max: 5.15
  7.0      8.0
Max: 5.15
Figure 9-145.  Population Estimates.  Secchi Disk Transparency (SECMEAN), Subregion 3A.
                                       340

-------
  VARIABLE: SECCHI TRANSP. IN M FOR LAKES s.2000 HA

  Population Size (N):  2098  SE(N):  212.6        Sample Size: 148
  Lake Area (A):  66169      SE(A):  10159
     i.o
                         16 FEB 1986
    o.o
        -      1-0       2.0      3.0      4.0      5.0      6.0
 Min:   0.05   QI: 0.97    Q2: 1.75     Q3:  2.08     Q4: 3.00


 Median:   1.92
 Mean:     2.07
 Std. Oev.:  1.22
   o.o
       0.0      1.0      2.0      3.0
Min:  0.05   Qj:  1.31     Q2: 1.93


Median: 2.26
                           r
                           7.0
                         Max: 8.45
8.0
*-      5.0      6.0       7.0      8.0
:  2.42     Q4: 3.32     Max: 8.45
Figure 9-146.  Population Estimates, Secchi Disk Transparency (SECMEAN), Subregion 3B.
                                       341

-------
VARIABLE: SILICA AS MG/L FOR LAKES s.2000 HA
                    16 FEB 1986
Population Size (N): 7096  SE(N):  165.3
Lake Area (A):   427864     SE(A): 36414
Sample Size: 763
    1.0-
   0.8-
   0.6-
    0.4-
    0.2-
   0.0-
       0.0     1.0     2.0     3.0     4.0     5.0     6.0     7.0     8.0     9.0     10.0
Min:  0.00    Qj:  0.58    Q2:  1.28     Q3:  2.42     Q4: 3.79     Max:  13.02


Median:   1.86
Mean:     2.41
Std. Dev.: 2.20
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
                                        ' **  
                                        ~"" ~ 
       0.0    1.0     2.0     3.0    4.0     5.0     6.0     7.0     8.0     9.0     10.0
Min:   0.00   Q^ 1.07     Q2: 1.86     Qj:  2.61     Q4: 3.82     Max: 13.02


Median: 2.18
Figure 9-147.  Population Estimates,  Silica (SI0211), Region 1.
                                       342

-------
  VARIABLE: SILICA AS MG/L FOR LAKES s.2000 HA
                                                                16 FEB 1986
Population Size (N): 8501   SE(N):  315.5
Lake Area (A):  501457     SE(A): 73306
   1.0-
                                              Sample Size: 587
     0.8
    0.6-
    0.4-
    0.2-
    0.0-
                          3-0
                                          5.0     To     To    J!o    g!o     o. o
 Min:   0.00   QI: 0.30    Q2:  1.32     Q3:  3.23    Q4:  6.78      Max: 22.60
 Median:   2.32
 Mean:     3.90
 Std Dev.:  4.42
   o.o
       '    '-0     2-     3.0     4.0     5.0     6.0     7.0    8.0    9.0    10 0
Min:   0.00   QI: 1.19     Q2:  3.83    Q3:  6.37    Q4: 10.50     Max:  22.60


Median: 5.32
Figure 9-148.  Population Estimates, Silica (SI0211), Region 2.
                                       343

-------
 VARIABLE: SILICA AS MG/L FOR LAKES s.2000 HA

 Population Size (N): 258   SE(N): 20.5        Sample Size: 94
 Lake Area (A):  24-272      SE(A): 4795
16 FEB 1986
    1.0-
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
       0.0    1.0     2.0     3.0     4.0     5.0     6.0     7.0     8.0     9.0     10.0
Min:  0.16    Qj: 6.78     Q2: 7.91     Q3: 10.78    Q4: 13.65    Max:  19.92


Median:    9.04
Mean:     9.94
Std. Dev.: 4.17
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       O.O    1.0     2.0     3.0     4.0     5.0     6.0     7.0     8.0     9.0    10.0
Min:   0.16    Qj:  7.61     Q2: 7.97     Qj:  9.83     Q4: 13.24     Max: 19.92


Median:  8.53
Figure  9-149.  Population Estimates, Silica (SI0211), Subregion 3A.
                                     344

-------
VARIABLE: SILICA AS MG/L FOR LAKES ^.2000 HA

Population Size (N): 2098  SE(N): 212.6       Sample Size:  148
Lake Area (A):  66169      SE(A):  10158
   1.0
                                                                   16 FEB 1986
        -    1-     2.0     3.0     4.0     5.0    6.0     7.0     8.0     9.0    10.0
    0.0
 Min:   0.01    QI: 0.08     Q2: 0.20     Q3:  0.4-4    Q4:  1.18      Max: 7.48
 Median:   0.31
 Mean:     1.00
 Std. Dev.:  1.69
    1.0
    0.8-
    0.6-
  -G(X)

    0.4-
    0.2-
   0.0-
       0.0
Min:   0.01


Median: 0.31
                   2.0
                          3.0     4.0     5.0     6.0     7.0     8.0     9.0     10.0
                0.13     Q2:  0.30    Q3:  0.46     Q4: 0.86      Max:  7.48
Figure 9-150.  Population Estimates, Silica (SI0211), Subregion 3B.
                                     345

-------
 VARIABLE: SODIUM AS UEQ/L FOR LAKES s.2000 HA
                    16 FEB 1986
 Population Size (N): 7096  SE(N):  165.3
 Lake Area (A):  427864     SE(A): 36414
Sample Size:  763
    1.0
    0.8-
    0.6-
    0.4
    0.2H
    0.0-
       0.0   50.0   100.0   150.0   200.0   250.0   300.0   350.0   400.0   450.0   500.0
 Min:  3.87    QI:  38.60   Q2: 62.83   Q3:  114.25    Q4: 285.20   Max: 2154.99
 Median:    82.84
 Mean:     205.26
 Std. Dev.:  301.54
    1.0
    0.8-
   0.6-
   0.4
   0.2-
   0.0-
       0.0   50.0    100.0   150.0  200.0  250.0   300.0  350.0   400.0   450.0   500.0
Min:   3.87   QI:  39.86   Q2:  58.48    Q3:  84.60   Q4: 134.24   Max:  2154.99


Median: 66.04
Figure 9-161.  Population Estimates, Sodium (NA18). Region 1.
                                     346

-------
  VARIABLE: SODIUM AS UEQ/L FOR LAKES *2000 HA
                    16 FEB 1986
  Population Size (N): 8501  SE(N): 315.5
  Lake Area (A): 501457    SE(A): 73306
Sample Size:  587
    0.0-f-
        0.0   50.0   100.0   150:0   200.0   250.0  300.0  350.0  400.0  450.0   500.0
 Min:   2.61    Q,: 20.28   Q2:  35.36   Q3:  52.45    Q4: 95.33     Max:  876.96


 Median:   41.18
 Mean:     66.33
 Std. Dev.: 76.50
    1.0
    0.8
    0.6
    0.*-
    0.2-
   0.0-
       0.0   50.0   100.0   150.0   200.0   250.0  300.0  35oTo400^0   45OO500.0
Min:  2.61    QI: 37.60   Q2:  52.98   Q3:  91.12    Q4: 116.25   Max:  876.96


Median: 75.01
Figure 9-152. Population Estimates, Sodium (NA16). Region 2.
                                     347

-------
VARIABLE: SODIUM AS UEQ/L FOR LAKES s.2000 HA

Population Size (N): 258   SE(N):  20.5        Sample Size: 94
Lake Area (A):  24272      SE(A): 4795
16 FEB 1986
    1.0
   0.8-


   0.6-

1-FW

   0.4-


   0.2-
   0.0-
       0.0   50.0   100.0   150.0   200.0  250.0   300.0  350.0   400.0   450.0   500.0
Min:  16.09   Qj: 59.86   Q2:  91.55    Q3:  127.58   Q4: 156.08   Max: 2546.88


Median:   103.11
Mean:     169.53
Std. Dev.: 278.83
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0   50.0    100.0   150.0   200.0   250.0   300.0   350.0   400.0   450.0  500.0
Min:   16.09   Q^  49.29   Q2: 62.13   Q3: 103.80  Q4: 190.30   Max: 2546.88


Median:  72.54
Figure 9-153. Population Estimates. Sodium (NA18), Subregion 3A.
                                    348

-------
  VARIABLE: SODIUM AS UEQ/L FOR LAKES s.2000 HA

  Population Size (N): 2098  SE(N): 212.6       Sample Size:  148
  Lake Area (A):  66169      SE(A):  10158
     1.0
16 FEB 1986
    o.o
       0.0   50.0    100.0   150.0  200.0  250.0   30o"o350.0   400.0   450.0   500.0
 Min:  45.37   QI:  107.42   Q2: 157.08   Q3: 242.14   Q4: 340.12   Max:  1241.05
 Median:   197.86
 Mean:     254.42
 Std. Dev.:  206.35
       0.0   50.0    100.0   150.0  200.0  250.0  300.0  350.0   400.0   45o7o500.0
   0.0
Min:   45.37   QI: 126.78  Q2: 226.78   Q3:  284.21   Q4: 311.82   Max:  1241.05
Median: 245.76
Figure 9-154. Population Estimates, Sodium (NA16), Subregion 3B.
                                      349

-------
 VARIABLE: SULFATE AS UEQ/L  FOR LAKESs.2000 HA
    Xc1: 50.0    Xc2: 100.0     Xc3:  150.0
 Population Size (N): 7096  SE(N):  165.3        Sample Size:  763
 Lake Area (A):  427864     SE(A): 36414
                                        16 FEB 1986
    o.o
       0.0   30.0    60.0
 Min:  29.09   Q  79.39
 Median:    115.40
 Mean:     133.17
 Std. Dev.:  81.68
 90.0    120.0   150.0   180.0   210.0   240.0   270.0   300.0
Q2: 103.58   Q3:  124.70   Q4: 164.95   Max: 879.87
PROPORTIONS AND NUMBERS ABOVE THE VALUE
Pc1: 0.973 Ncl: 6901 Ncul: 7175
Pc2: 0.630 Nc2:4472 Ncu2: 4740
Pc3: 0.260 Nc3: 1846 Ncu3: 2082
OFXC
   0.0
       0.0   30.0    60.0    90.0    120.0    150.0   180.0   210.0   240.0   270.0   300.0
Min:   29.09  QI:  76.61    Q2: 90.14    Q3:  113.32   Q4: 140.57   Max: 879.87
Median: 100.11'
PROPORTIONS
Gc1: 0.979
Gc2: 0.502
Gc3: 0.158
AND
A1-
Ac3-
AREA ABOVE THE
418903 Acu1:
214974 Acu2
67788 Acu3
VALUE OF
478671
253328
: 84904
xc
Rgure 9-165.  Population Estimates, Sulfate (S0416), Region 1.
                                    350

-------
 VARIABLE: SULFATE AS UEQ/L  FOR LAKESs.2000 HA
                                                        16 FEB 1986
    Xc1: 50.0    Xc2: 100.0     Xc3: 150.0
 Population Size (N): 1290
 Lake Area (A):  118776
                  SE(N): 47.6
                  SE(A): 22186
Sample Size: 155
    0.0
       0.0
 Min:  42.53
     30.0    60.0   90.0    120.0   150.0   180.0   210.0   240.0   270.0   300.0
      QI:  104.00   Q2: 115.95   Q3: 124.68   Q4:  141.88   Max:  372.26
 Median:   118.68
 Mean:    124.77
 Std. Dev.: 40.75
              PROPORTIONS AND NUMBERS ABOVE THE VALUE OF
             Pcl: 0.994  Ncl: 1282    Ncul: 1361
             P^: 0.841   Nc2:1085    Ncu2: 1174
             Pc3: 0.128   Nc3:165     Ncu3: 216
    1.0
   0.8
   0.6-
   0.4n
   0.2-
   0.0-
Min:  42


Median: 128.86
.0   30.0   80.0    90.0   120.0   130.0   180.0   210.0   240.0   270.0   300.0
.53  QI: 112.58   Q2: 123.60  Q3:  129.57   Q4: 149.41   Max:  372.26
             PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
             Gc1:  0.999    Ac1:  118664    Acul:  155162
             Gc2: 0.888   A^:  105440    Acu2: 139313
                  0.185   Ac3:  21987     Acu3: 35973
Figure  9-156.  Population Estimates, Sulfate (S0416). Subregion 1A.
                                    351

-------
 VARIABLE: SULFATE AS UEQ/L FOR LAKES-s.2000 HA
    Xc1:  50.0    Xc2:  100.0    Xc3: 150.0
 Population Size (N): 1479   SE(N):  92.9        Sample Size: 143
 Lake Area (A):  26872      SE(A): 2913
                                                                16 FEB 1986
    i.o-
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
             i       i
       0.0   30.0   60.0
Min:  38.10  Q^ 118.10
 Median:   159.25
 Mean:     182.62
 Std. Dev.: 90.95
                          90.0    120.0   150.0   180.0   210.0   240.0  270.0   300.0
                         Q2: 144.74   Q3: 182.85   Q4: 220.96   Max: 514.25
PROPORTIONS AND NUMBERS ABOVE THE VALUE
Pc1: 0.998 Nc1: 1476 Ncu1: 1629
Pc2: 0.906 Nc2:1340 Ncu2: 1504
Pc3: 0.561 Nc3:829 Ncu3: 1003
OFXC
   o.o
      0.0   30.0    60.0   90.0   120.0   150.0   180.0
Min:  38.10   Qj:  123.54   Q2: 146.63   Q3:  169.40
                                                    210.0   240.0   270.0   300.0
                                                     : 198.75.   Max: 514.25
Median: 158.51
                     PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
                     Gcl:  0.998    Ac1:  26818     Acul:  31611
                     Gc2:  0.931   Ac2:  25028     ACL)2:  29918
                          0.533   Ac3:  14330     Acu3:  18076
Figure 9-157.  Population Estimates, Sulfate (S0416), Subregion 1B.
                                     352

-------
VARIABLE: SULFATE AS UEQ/L FOR LAKES
-------
 VARIABLE: SULFATE AS UEQA FOR LAKESs.2000 HA
    Xc1: 50.0    Xc2: 100.0    Xc3: 150.0
 Population Size (N): 1318   SE(N):  93.7        Sample Size: 126
 Lake Area (A):  36403     SE(A): 4381
                                                              16 FEB 1986
     1.0
    0.8-
    o.e-
    0.4-
    0.2-
    0.0-
      0.0    30.0   80.0    90.0   120.0
Min:  58.80  QI: 108.18   Q2: 127.80
                                       150.0  180.0   210.0   240.0  270.0   300.0
                                       3:  155.80   Q4: 190.25    Max:  477.82
 Median:   141.12
 Mean:    168.88
 Std. Dev.: 89.76
                     PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
                                            N
                                             'cu1:
1472
Pc1: 1.000  Nc1: 1318
Pc2: 0.870  Nc2:1146    Ncu2: 1299
Pc3: 0.458  Nc3: 604    Ncu3: 737
    1.0
   0.8
   0.6-
   0.4-
   0.2-
   0.0-
                                              \ ^
      0.0   30.0   60.0   90.0    120.0   150.0   180.0  210^0   240.0   27OO   300.0
Min:  58.80   QI: 116.00  Q2: 139.03  Q3:  159.41   Q4: 189.52   Max: 477.82
Median:  152.68
                    PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
                    Gc1:  1.000   Acl: 36403     Acu1:  43610
                    Gc2:  0.908   A^: 33068     Acu2:  40169
                    Gc3:  0.518   Ac3: 18871      Acu3:  25309
Rgure  9-159.  Population Estimates,  Sulfate (S0416), Subregion 1D.
                                   354

-------
VARIABLE: SULFATE AS UEQA  TOR LAKESs.2000 HA
   Xc1: 50.0    Xc2:  100.0     Xc3:  150.0
Population Size (N): 1526   SE(N):  66.0        Sample Size: 176
Lake Area (A):  173400     SE(A): 25725
                                        16 FEB 1986
   1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
      0.0   30.0   60.0   90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
Min:  29.09  Q}: 56.37   Q2:  68.58   Q3:  78.72    Q4: 87.82    Max:  264.31
Median:   74.61
Mean:     74.98
Std. Dev.: 25.24
PROPORTIONS AND NUMBERS ABOVE THE VALUE
Pc1: 0.885 Ncl: 1350 Ncu1: 1463
Pc2: 0.093 Nc2:142 Ncu2: 196
Pc3: 0.011 Nc3: 16 Ncu3: 34
OFXC
   1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
      0.0   30.0   60.0
Min:  29.09  Qj: 64.18
 90.0    120.0    150.0   180.0   210.0  240.0   270.0  300.0
Q2: 78.20    Q3:  83.72   Q^.: 90.14     Max: 264.31
Median: 81.29
PROPORTIONS
Gc1: 0.950
Gc2: 0.068
Gc3: 0.006
AND
Ac1:
Ac3
AREA ABOVE THE
164696 Acu1:
11785 Acu2:
1022 Acu3
VALUE OF Xc
206822
21960
: 2488
Rgure 9-160.  Population Estimates,  Sulfate (S0416), Subregion 1E.
                                      355

-------
  VARIABLE: SULFATE AS UEQA  FOR LAKESs.2000 HA
     Xcl:  50.0    Xc2:  100.0     Xc3: 150.0
  Population Size (N): 8501   SE(N):  315.5       Sample Size:  587
  Lake Area (A):  501457     SE(A): 73306
                                                           16 FEB 1986
    o.o
        0.0   30.0    80.0   90.0   120.0   150.0   180.0   210.0   240.0   270.0   3000
 Min:   2.08    QI:  34.51    Q2:  51.03    Q3:  65.81    Q4: 87.81     Max: 1917.52
 Median:   57.12
 Mean:     71.63
 Std. Oev.:  89.95
                PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X
                Pc1: 0.611    Nc1: 5193    Ncu1:  5768               '
                Pc2: 0.148   NC2.-1254    Ncu2:  1654
                Pc3: 0.071   Nc3:608    Ncu3:  932
   o.o
Min:
 o.o
2.08
30.0    50.0
 Q1: 34.50
Median: 61.64
 90.0   120.0   150.0   180.0
Q2: 53.82   Q3:  71.28
210.0   240.0   270.0  300.0
.: 87.21     Max: 1917.52
PROPORTIONS AND AREA ABOVE THE VALUE OF X
Gel'
Gc2:
GC3-'
0.638
0.090
.0.037
Ac1:
Ac2:
Ac3:
319791
45280
18353
cu1"
Acu2:
Acu3:
412988
65542
34835
Rgure  9-181.  Population Estimates, Sulfate (S0416), Region 2.
                                   356

-------
 VARIABLE: SULFATE AS UEQ/L  FOR LAKESs.2000 HA
    Xcl: 50.0     Xc2:  100.0     Xc3: 150.0
 Population Size (N): 1457   SE(N):  74.3        Sample Size: 147
 Lake Area (A):  142979     SE(A): 37582
                                                           16 FEB 1986
    1.0-
   0.8-
   0.6-
    0.4-
    0.2-
   0.0-
Min:
 0.0   30.0    60.0   90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
9.16    Qj: 46.61    Q2: 56.57   Q3:  69.54   Q4: 83.91    Max: 1917.52
Median:   62.52
Mean:     84.39
Std. Dev.: 183.37
PROPORTIONS AND NUMBERS ABOVE THE VALUE
Pcl: 0.737 Nc1: 1073 Ncul: 1204
Pc2: 0.097 Nc2:141 Ncu2: 209
Pc3: 0.019 Nc3:28 Ncu3: 60
OFXC
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
Min:
 0.0   30.0   60.0   90.0    120.0    150.0   180.0   210.0   240.0   270.0   300.0
9.16    Qj: 60.26   Q2: 73.65    Q3: 79.10    Q4: 86.33    Max:  1917.52
Median: 78.98
                     PROPORTIONS AND AREA ABOVE THE VALUE OF X,
                Gc1:  0.878
                Gc2:  0.095
                Gc3:  0.012
                                     c1:
      125600
A^:  13514
Ac3:  1661
Acu1: 186914
Acu2: 22416
Acu3:
Figure 9-162.  Population Estimates,  Sulfate (S0416), Subregion 2A.
                                      357

-------
VARIABLE: SULFATE AS UEQ/L FOR LAKES*2000 HA
   Xc1: 50.0    Xc2: 100.0     Xc3: 150.0
Population Size (N): 1050  SE(N): 72.5        Sample Size: 146
Lake Area (A):  34025     SE(A): 10854
                                                         16 FEB 1986
    i.o
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
Min:
 0.0   30.0   80.0    90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
16.45   Qj: 49.12    Q2: 68.54   Q3:  84.01   Q4:  103.46   Max:  281.28
Median:   77.72
Mean:     83.57
Std. Dev.: 45.55
PROPORTIONS AND NUMBERS ABOVE THE VALUE OF Xc
Pc1: 0.791 Nc1: 831
Pc2: 0.263 Nc2:276
Pc3: 0.066 Nc3:69
Ncu1: 954
Ncu2: 372
Ncu3: 123
   1.0
   0.8-


   0.6-

1-GOO

   0.4-


   0.2-
   0.0-
      0.0   .30.0    60.0   90.0   120.0   150.0   180.0   210.0   240.0  270.0   300.0
Min:  16.45   Qj: 70.21    Q2:  97.93    Q3:  104.61   04.: 256.77   Max: 281.28
Median: 102.57
               PROPORTIONS AND AREA ABOVE THE VALUE OF
               Gc1:  0.943    Acl:  32084    Acu1:  49992
               Gc2:  0.578    A^:  19674     Acu2:  37070
               Gc3:  0.320    Ac3: 10889    Acu3:  26780
Figure 9-163.  Population Estimates, Sulfate (S0416), Subregion 2B.
                                    358

-------
VARIABLE: SULFATE AS UEQ/L FOR LAKESs.2000 HA
   Xcl:  50.0    Xc2: 100.0    Xc3:  150.0
Population Size (N):  14-80  SE(N):  48.8        Sample Size: 153
Lake Area (A):  97556     SE(A):  21357
                                                         16 FEB 1986
   o.o
Min:
 o.o
11.66
30.0    60.0
 Q:  41.88
 90.0   120.0   150.0   180.0  210.0   240.0   270.0   300.0
Q2: 53.53   Q3:  61.28   Q4: 76.38    Max:  169.68
Median:   56.93
Mean:     60.50
Std. Dev.: 25.28
PROPORTIONS AND NUMBERS ABOVE THE VALUE
Pcl: 0.695 Nc1: 1028 Ncul: 1138
Pc2: 0.064 Nc2:94 Ncu2: 141
Pc3: 0.010 Nc3:15 Ncu3: 40
OFXC
    1.0-
   0.8-
   0.6-
   0.4J
   0.2-
   0.0
 Min:
 o.o
11.66
 I       I       I       I      I'      I
30.0    60.0    90.0   120.0   150.0   180.0
 Qj:  51.43    Q2: 60.82   Q3:  71.00
                                                     210.0   240.0   270.0   300.0
                                                     : 85.59    Max:  169.68
 Median: 62.44
                      PROPORTIONS AND AREA ABOVE THE VALUE OF X(
                Gc1:  0.831
                Gc2:  0.042
                Gc3:  0.005
            c1:
                            81078
                            4125
                       Ac3: 445
Acu1:  115637
Acu2: 7074
Acu3: 1154
 Figure  9-164.  Population Estimates, Sulfate (S0416), Subregion 2C.
                                      359

-------
  VARIABLE: SULFATE AS UEQ/L FOR LAKESs.2000 HA
     Xc1: 50.0    Xc2: 100.0     Xc3: 150.0
  Population Size (N): 4515   SE(N): 293.9       Sample Size: 141
  Lake Area (A):  226896     SE(A): 58202
                                                           16 FEB 1986
    o.o
 Mini
  o.o
 2.08
 30.0    60.0
  Qj: 29.02
  90.0   120.0   150.0  180.0   210.0   240.0   270.0   300.0
 Q2: 4-2.35   Q3:  57.50    Q4: 85.40    Max: 292.73
 Median:   50.14
 Mean:    68.38
 Std. Dev.: 59.64
                PROPORTIONS AND NUMBERS ABOVE THE VALUE OF X
                Pc1: 0.501   Ncl: 2261    Ncul:  2797
               Pc2: 0.165   Nc2:743     Ncu2:  1122
                Pc3: 0.110   Nc3:495     Ncu3:  813
   o.o
Min:
 o.o
2.08
30.0    60.0
 Q\ 22.48
Median: 41.44
 90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
Q2: 34.49   Q3:  44.08   Q4: 76.16     Max: 292.73
PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
Gc1: 0.357 ;
Gc2: 0.035 A
Gc3: 0.024 A
^c1: 81029
&: 7967
c3: 5^58
Acu1: 139434 '
Acu2: 12437
ACL)3: 9234
Figure  9-185.  Population Estimates, Sulfate (S0416), Subregion 2D.
                                    360

-------
VARIABLE: SULFATE AS UEQ/L FOR LAKESi.2000 HA
   Xc1: 50.0    Xc2:  100.0     Xc3:  150.0
Population Size (N): 258   SE(N):  20.5        Sample Size: 94
Lake Area (A):  24272      SE(A):  4795
                                       16 FEB 1986
   1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
       0.0   30.0   80.0   90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
Min:   10.62  Q^ 19.55    Q2: 27.10    Q3: 35.79    Q4: 59.56    Max:  828.64
Median:   31.84
Mean:     58.96
Std. Dev.: 90.56
PROPORTIONS AND NUMBERS ABOVE THE VALUE
PC1: 0.231 NC1: 59 Ncu1: 82
Pc2: 0.146 Nc2:38 Ncu2: 56
Pc:5: 0.085 Nc3: 22 Ncu3: 36
CO v*-w WUv
OFXC
    1.0-
   0.8-
   0.6-
   0.4-
   0.2-
   o.o
       0.0    30.0    60.0
Min:  10.62  Qj: 21.95
 90.0    120.0    130.0   180.0   210.0   240.0   270.0   300.0
Q2: 27.88    Q3:  36.18   Q4: 73.16    Max: 828.64
Median:  31.41
PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
Gcl:
Gc2:
Gc3:
0.300
0.087
0.071
Ad:
Ac2:
Ac3-'
7281
2117
1720
Acu1:
Acu2:
Acu3:
13390
3179
2737
 Figure  9-166.  Population Estimates. Sulfate (S0416), Subregion 3A.
                                     361

-------
 VARIABLE: SULFATE AS UEQ/L FOR LAKESs.2000 HA
    Xc1:  50.0    Xc2: 100.0    Xc3:  150.0
 Population Size (N):  2098  SE(N):  212.6        Sample Size: 148
 Lake Area (A): 66169      SE(A): 10158
                                                                16 FEB 1986
    1.0
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
                   V 
 Min:
       0.0
      3.02
30.0    60.0
 Qi 28.40
 90.0   120.0   150.0   180.0   210.0   240.0   270.0   300.0
Q2: 68.09   Q3:  148.54  Q4: 272.45   Max: 2477.58
 Median:   93.72
 Mean:    249.82
 Std. Dev.: 416.49
PROPORTIONS AND NUMBERS ABOVE THE VALUE
Pc1: 0.681 Ncl: 1428 Ncul: 1720
Pc2: 0.494 Nc2:1037 Ncu2: 1290
Pc3: 0.403 Nc3:846 Ncu3: 1088
OFXC
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0
Min:
      0.0   30.0    60.0    90.0   120.0   150.0   180.0   210.0   240.0   270.0  300.0
     3.02   QI:  39.79    Q2: 108.94  Q3:  229.22  Q4: 393.58   Max: 2477.58
Median: 128.33
                     PROPORTIONS AND AREA ABOVE THE VALUE OF Xc
                     Gc1:  0.783    Acl:  51787     Acul:  67699
                     Gc2:  0.631   A^:  41764     Acu2: 56528
                     Gc3:  0.460   Ac3:  30443    Acu3: 44423
Figure 9-167.  Population Estimates, Sulfate (S0416), Subregion 3B.
                                    362

-------
 VARIABLE: TURBIDITY IN NTU FOR LAKES *2000 HA
                    16 FEB 1986
 Population Size (N): 7096  SE(N):  165.3
 Lake Area (A):  427864    SE(A):  36414
Sample Size:  763
   o.o
       0.0    1.0     2.0     3.0     4.0    5.0    6.0    7.0     8.0    9.0     10.0
Min:  0.00   Qj: 0.40    Q2:  0.60    Q3:  0.90    Q4: 1.59      Max:  17.40
Median:   0.70
Mean:     1.26
Std. Dev.: 1.73
   o.o
      0.0    1.0    2.0    3.0    4.0     5.0     6.0     7.0     8.0     9.0    10.0
Min:   0.00   Qj:  0.28    Q2: 0.45    03: 0.69     Q4: 1.07     . Max: 17.40


Median:  0.50
Figure 9-168. Population Estimates, Turbidity (TURVAL), Region!
                                    363

-------
 VARIABLE: TURBIDITY IN NTU FOR LAKES *.2000 HA
                                                                 16 FEB 1986
 Population Size (N): 8501   SE(N):  315.5
 Lake Area (A):  501457     SE(A): 73306
                                             Sample Size: 587
    1.0
    o.s-l
    0.6-
    0.4-
    0.2-
    0.0-
       0.0     1.0     2.0     3.0    4.0     5.0     6.0     7.0     8.0    9.0    10.0
Min:  0.10    Qj: 0.50    Q2: 0.80     Qj: 1.16     Q4: 1.86      Max:  24.00
Median:
Mean:
Std. Dev.:
          0.90
          1.34
          1.33
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       0.0    1.0     2.0     3.0     4.0     5.0     6.0     7.0     8.0     9.0     10.0
Min:   0.10    Qj: 0.47     Q2:  0.90    Q3:  1.50     Q4: 2.23     Max:  24.00


Median: 1.23
Figure 9-169.  Population Estimates, Turbidity (TURVAL), Region 2.
                                      364

-------
 VARIABLE: TURBIDITY IN NTU FOR LAKES s.2000 HA
                    16 FEB 1986
 Population Size (N): 258   SE(N): 20.5
 Lake Area (A):  24272      SE(A): 4795
Sample Size: 94
    1.0
    0.8-
    0.6-
    0.4-
    0.2-
    0.0-
                                               x _
       0-0    1.0     2.0     3.0     4.0     5.0     6.0     7.0     8.0     9.0    10.0
 Min:  0.80   Qj:  1.86     Q2:  3.28    Q3:  4.73     Q4: 9.14      Max: 28.00
 Median:    3.87
 Mean:     5.81
 Std. Dev.:  5.54
    1.0
    0.8-
   0.6-
   0.4-
   0.2-
   0.0-
       -    1-0     2.0     3.0     4.0     5.0     5.0     7.0     8.0     9.0     10.0
Min:   0.80   QI: 1.46     Q2: 2.15     Q3:  3.95     Q4: 5.57     Max:  28.00


Median: 3.34
Figure 9-170.  Population Estimates, Turbidity (TURVAL), Subregion 3A.
                                      365

-------
  VARIABLE: TURBIDITY IN NTU  FOR LAKES *.2000 HA

  Population Size (N): 2098  SE(N):  212.6       Sample Size: 148
  Lake Area (A):  66169      SE(A):  10158
                                                                  16 FEB 1986
     1.0
     0.8
     0.6
     0.4
     0.2i
     0.0'
                                          5-    6.0     7.0     8.0     9.0     10 0
       0.0    1.0     2.0     3.0     4.0
Min:  0.10    QI: 0.51     Q2:  0.82    Q3: 1.19      Q4: 2.22     Max: 290.00


Median:   0.89
Mean:     7.47
Std. Dev.: 38.98
   o.o
       o.o    1.0
                    2.0     3.0
                                  4.0
                                         5-     6.0     7.0     8.0     9.0    10 0
Min:  0.10    QI: 0.51     Q2:  0.62     Q3: 0.88     Q4: 1.82      Max: 290.00

Median: 0.75
Figure 9-171.  Population Estimates, Turbidity (TURVAL), Subregion 3B.
                                      366

-------
 VARIABLE: WATERSHED AREA IN HA FOR LAKES s.2000 HA
                                                               22 JAN 1986
 Population Size (N): 7096  SE(N):  165.3
 Lake Area (A):  427864    SE(A):  36409
                                            Sample Size: 763
    0.0
                                         I       I      I       I
                                        5.0     6.0     7.0     8.0
      0-0    1-0     2.0     3.0    4.0    5.0    6.0     7.0     8.0    9.0    10.0
Min:  13.00  Q,: 90.17   Q2:  196.15   Q3:  401.52   Q4: 1288.86  Max:  2294$loO
 Median:   270.49
 Mean:    3398.58
 Std. Dev.: 16972.40
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
      -    1-0    2.0     3.0     4.0     5.0    6.0    7.0     8.0     9.0    10.0
Min:   13.00   Qj: 475.93   Q2: 1847.96  Q3:  6135.38 Q4: 17474.30  Max: 22943^00
Median: 3303.42
Figure 9-172.  Population Estimates, Watershed Area (WSHED), Region 1.
                                    367

-------
 VARIABLE: WATERSHED AREA IN HA FOR LAKES ^2000 HA
                                                                22 JAN 1986
 Population Size (N): 8515  SE(N):  315.5
 Lake Area (A):  503577    SE(A):  73688
                                             Sample Size: 587

    0.8-


    0.6-

 1-FOO

    0.4-


    0.2-
    0.0
                                                      I       I	1	
                                                      7.0     8.0    9.0    10.0
       0.0    1.0     2.0     3.0    4.0     5.0     6.0
 Min:  10.00  Qj: 55.97   Q2: 109.88   Q3: 247.44   Q4: 1023.02  Max:
 Median:   177.14
 Mean:    1993.40
 Std. Dev.: 8566.93
   o.o
       -
             1-0     2.0     3.0    4.0    5.0    5.0     7.0     8.0
Min:  10.00   Q^ 418.97   Q2:  1787.70  Q3:  4424.01  Q4: 8655.20  Max:


Median:  3185.37
r
9.0
                                                                         10.0
Figure 9-173.  Population Estimates, Watershed Area (WSHED), Region 2.
                                   368

-------
VARIABLE: WATERSHED AREA IN HA FOR LAKES s.2000 HA

Population Size (N): 258   SE(N): 20.6       Sample Size:  94
Lake Area (A):  24273      SE(A): 4798
                                                               22 JAN 1986
    1.0
    0.8-
    o.e-
    0.4-
    0.2-
   0.0-
       0.0    1.0    2.0    3.0     4.0     5.0    6.0    7.0     8.0     9.0    10.0
Min:  80.00  Q^ 182.04  Q2: 465.69  Q3:  1245.16  Q4: 5836.03 Max: 4826?$00
Median:   681.84
Mean:     21299.10
Std. Dev.: 63765.60
    1.0
   0.8-
   0.6-
   0.4-
   0.2-
   0.0-
      0.0    1.0     2.0     3.0    4.0    5.0     6.0     7.0    8.0    9.0     10.0
Min:  80.00  Qj: 8798.03 Q2:  23618.90Qj: 47743.80Q4: 191194.00 Max:  4826?$00
Median: 37369.90
Figure 9-174.  Population Estimates, Watershed Area (WSHED), Subregion 3A.
                                     369

-------
  VARIABLE: WATERSHED AREA IN HA FOR LAKES i2000 HA

  Population Size (N): 2138  SE(N): 221.6       Sample Size: 129
  Lake Area (A):  64786     SE(A):  10742
           22 JAN 1986
     0.2
    o.o
                                                6.0
i	i	1	
7-0     8.0    9.0    10.0
       0-0-   1.0    2.0     3.0     4.0     5.0
Min:   16.00   QI:  34.70    Q2: 83.49   Q3:  136.07   Q4: 351.69   Max:"l22l2T^


Median:   114.60
Mean:     317.71
Std. Dev.:  666.65
                                                                  g.o
                                                                         10.0
Min:   16.00   Qj:  116.23   Q2: 289.15  Q3:  441.57   Q4: 838.98  . Max: 12212*$)

Median: 391.49
Figure 9-175.  Population Estimates, Watershed Area (WSHED), Subregion 3B.
                                       370

-------
 VARIABLE: WATERSHED/LAKE AREA FOR LAKES s.2000 HA
                    16 FEB 1986
 Population Size (N):  7096  SE(N):  165.3
 Lake Area (A):  427864    SE(A):  36409
Sample Size:  763
    1.D
    0.8-
    0.61
 FOO
    0.4-
    0.2-
    0.0-
       0.0     50.0     100.0     150.0    200.0    250.0    300.0    350.0     400.0
 Min:  1.90    Qj: 6.20    Q2:  10.04   Q3:  17.20    Q4: 38.63   Max: 16843.70
 Median:   13.04
 Mean:    72.00
 Std. Dev.: 557.58
    1.0-
   0.8-
   0.6-
G(X)
   0.4-
   0.2-
   0.0-
      0-0     50.0     100.0     150.0     200.0    250.0    300.0     350.0    400.0
Min:   1.90    Qj:  6.71     Q2: 9.69    Q3:  19.84    Q4: 44.74     Max:  16843.70


Median:  13.58
Figure 9-176.  Population Estimates, Watershed Area/Lake Area (WALA), Region 1.
                                     371

-------
  VARIABLE: WATERSHED/LAKE AREA FOR LAKES s.2000 HA
                                                             16 FEB 1986
  Population Size (N): 8515   SE(N):  315.5
  Lake Area (A): 503577     SE(A): 73688
                                         Sample Size:  587
     1.0
     0.8
     0.6-
  F(X)
     0.4-
     0.2-1
    0.0-
 Min:
  0.0     50.0     100.0    150.0
 1.73    QI: 4.31     Q2: 7.45
                           200.0    250.0     300.0
                          Q3:  14.10    Q4: 30.32
                           350.0     400.0
                          Max: 1687.34
 Median:   10.28
 Mean:     43.67
 Std Dev.: 175.01
    1.0
    0.8
    0.6-
 G(X)
    0.4-
    0.2-
   0.0-
Min:
 o.o
1.73
 50.0     100.0     150.0
Qj: 3.54    Q2:  8.45
200.0     250.0    300.0
j: 13.19    Q4: 29.04
 350.0    400.0
Max: 1687.34
Median: 11.11
Figure 9-177.  Population Estimates, Watershed Area/Lake Area (WALA), Region 2.
                                       372

-------
 VARIABLE: WATERSHED/LAKE AREA FOR LAKES *.2000 HA
 Population Size (N): 258   SE(N):  20.6
 Lake Area (A):  24-273      SE(A):  4798
                                            Sample Size: 94
   o.o
                                                                16 FEB 1986
      0.0     50.0     100.0     150.0
Min:  10.14   QI:  20.69   Q2: 35.91
                                       200.0    250.0     300.0     350.0    400.0
                                       3:  57.62   Q4: 127.93    Max:  5301.14
Median:   44.22
Mean:     242.94
Std. Dev.: 772.71
    1.0-
   0.8-


   0.6-
G(X)

   0.4-


   0.2-
   0.0-
      0.0     50.0     100.0     150.0    200.0     250.0    300.0    350.0     400.0
Min:  10.14   Qj:  26.36   Q2: 36.87   Q3: 81.49    Q: 332.61   Max: 5301.14
Median: 44.52
Figure 9-178.  Population Estimates,  Watershed Area/Lake Area (WALA), Subregion 3A.
                                      373

-------
  VARIABLE: WATERSHED/LAKE AREA FOR LAKES s.2000 HA
                                                                 16 FEB 1986
  Population Size (N): 2138
  Lake Area (A):  64786
                          SE(N): 221.6
                          SE(A):  10742
                                              Sample Size: 129
REGION    3
SUB.RGN  B
CLASS
   0.0
      0.0
Min:  1.91
               50.0     100.0     150.0    200.0    250.0     300.0
              Qj:  3.54    Q2: 4.84     Q3:  6.90     Q4: 11.99
                                                                   350.0    400.0
                                                                  Max: 172.71
 Median:   5.50
 Mean:     13.91
 Std. Dev.: 27.93
    1.0
    0.8
    0.6
 GOO
    0.4-
    0.2-
   0.0'
       0.0
Min:   1.91


Median: 4.76
             50.0     100.0     150.0    200.0     250.0
            QI:  3.18     Q2: 4.43     Q3: 5.79     Q4: 10.26
                                                                  35o          0
                                                                 Max:  172.71
                                     *U.S.GOVERNMENTPRINnNGOmCE:1986-6'+6-ll H061 3REGIONNO.4

Figure 9-179.  Population Estimates.  Watershed Area/Lake Area (WALA). Subreaion3R

                                      374

-------
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