U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
THOMPSON LAKE
LIVINGSTON COUNTY
MICHIGAN
EPA REGION V
WORKING PAPER No,
PACIFIC NORTHWEST ENVIRONMENTAL RESEARCH LABORATORY
An Associate Laboratory of the
NATIONAL ENVIRONMENTAL RESEARCH CENTER - CORVALLIS, OREGON
and
NATIONAL ENVIRONMENTAL RESEARCH CENTER - LAS VEGAS, NEVADA
iJGPO 697.032
-------
REPORT
ON
THOMPSON LAKE
LIVINGSTON COUNTY
MICHIGAN
EPA REGION V
WORKING PAPER No,
WITH THE COOPERATION OF THE
MICHIGAN DEPARTMENT OF NATURAL RESOURCES
AND THE
MICHIGAN NATIONAL GUARD
FEBRUARY, 1975
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CONTENTS
Page
Foreword i i
List of Michigan Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 5
IV. Nutrient Loadings 10
V. Literature Reviewed 14
VI. Appendices 15
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11
EP_R.! W-P-B.2
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to fresh water lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [§303(e)], water
quality criteria/standards review [§303(c)J, clean lakes [§314(a,b)],
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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Ill
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condi-
tion are being made to advance the rationale and data base for
refinement of nutrient water quality criteria for the Nation's
fresh water lakes. Likewise, multivariate evaluations for the
relationships between land use, nutrient export, and trophic
condition, by lake class or use, are being developed to assist
in the formulation of planning guidelines and policies by EPA
and to augment plans implementation by the states.
ACKNOWLEDGMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U. S. Environmental Protection Agency)
expresses sincere appreciation to the Michigan Department of
Natural Resources for professional involvement and to the
Michigan National Guard for conducting the tributary sampling
phase of the Survey.
A. Gene Gazlay, former Director, and David H. Jenkins, Acting
Director, Michigan Department of Natural Resources; and Carlos
Fetterolf, Chief Environmental Scientist, and Dennis Tierney,
Aquatic Biologist, Bureau of Water Management, Department of Natural
Resources, provided invaluable lake documentation and counsel during
the course of the Survey. John Vogt, Chief of the Bureau of Environ-
mental Health, Michigan Department of Public Health, and his staff
were most helpful in identfying point sources and soliciting municipal
participation in the Survey.
Major General Clarence A. Schnipke (Retired), then the Adjutant
General of Michigan, and Project Officer Colonel Albert W. Lesky,
who directed the volunteer efforts of the Michigan National Guardsmen,
are also gratefully acknowledged for their assistance to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF MICHIGAN
LAKE NAME
Allegan Res.
Barton
Belleville
Betsie
Brighton
Caro Res.
Charlevoix
Chemung
Constant!'ne Res
Crystal
Deer
Ford
Fremont
Higgins
Holloway Res.
Houghton
Jordon
Kent
Long
Macatawa
Manistee
Mona
Muskegon
Pentwater
Pere Marquette
Portage
Randall
Rogers Pond
Ross
St. Louis Res.
Sanford
Strawberry
Thompson
Thornapple
Union
White
COUNTY
Allegan
Ka lamazoo
Wayne
Benzie
Livingston
Tuscola
Charlevoix
Livingston
St. Joseph
Montcalm
Marquette
Washtenaw
Newago
Roscommon
Genesee, Lapeer
Roscommon
Ionia, Barry
Oakland
St. Joseph
Ottawa
Manistee
Muskegon
Muskegon
Oceana
Mason
Houghton
Branch
Mecosta
Gladwin
Gratiot
Midland
Livingston
Livingston
Barry
Branch
Muskegon
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outlet
THOMPSON LAKE
® Tributary Sampling Site
X Lake Sampling Site
/ Direct Drainage Area Boundary
Indirect Drainage Area
Urban Area
Y2 Mi.
Map Location
42° 37' .
42"36
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THOMPSON LAKE
STORE! NO. 2697
I. CONCLUSIONS
A. Trophic Condition:
Survey data show that Thompson Lake is eutrophic. Of the 35
Michigan lakes sampled in November when essentially all were well-
mixed, 15 had less mean total phosphorus, 17 had less mean dis-
solved phosphorus, and nine had less mean inorganic nitrogen; of
all 41 lakes sampled, 21 had less mean chlorophyll a^, but only
six had greater Secchi disc transparency*.
Near depletion of dissolved oxygen at the 21-foot depth was
noted at station 1 in September, 1972, and Survey limnologists
observed a heavy algal bloom at that time.
B. Rate-Limiting Nutrient:
r
A significant change in nutrients occurred in the algal assay
sample, and the results are not representative of conditions in
the lake at the time the sample was collected (09/19/72).
The lake data indicate marginal nitrogen limitation in June
and September but phosphorus limitation in November.
C. Nutrient Controllability:
1. Point sources—Other than septic tanks, there were no
known point sources contributing phosphorus to Thompson Lake;
and, during the sampling year, the lake received a total
See Appendix A.
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phosphorus load at a rate somewhat less than that proposed
by Vollenweider (in press) as "dangerous" but more than his
suggested "permissible" rate (i.e., a mesotrophic rate; see
page 13). However, the existing trophic condition indicates
that either the phosphorus loading rate was higher in the past
or the Survey sampling did not reveal the actual loading rate.
In this regard, it is noted that there was an apparent
loss of phosphorus during the sampling year; that is, more
phosphorus was measured leaving the lake than was estimated
or measured entering the lake (see page 11). While it is
possible that such a phosphorus wash-out could have occurred,
it is more likely that the "loss" resulted from unknown and
unmeasured sources discharging directly to the lake (e.g.,
urban drainage), underestimation of septic tank contributions,
or the limits of accuracy of the flow estimates provided by
the U.S. Geological Survey (see footnote, page 4).
2. Non-point sources (see page 13)--During the sampling
year, the phosphorus export of the unnamed stream (B-l) was
somewhat higher than the exports of the tributaries to other
lakes studied in Livingston County (e.g., Ore Creek to Brighton
2
Lake* at 32 Ibs/mi /yr and the unnamed tributary to Lake Chemung**
* Working Paper No. 187.
** Working Paper No. 189.
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2
at 50 Ibs/mi /yr). Whether the greater export is due to
differences in cultural practices in the drainages or to
the limits of sampling accuracy is not known.
In all, it is estimated that non-point sources, including
precipitation, contributed about 87% of the total phosphorus
load to Thompson Lake during the sampling year.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
A. Lake Morphometry :
1. Surface area: 262 acres.
2. Mean depth: 9 feet.
3. Maximum depth: 52 feet.
4. Volume: 2,358 acre-feet.
5. Mean hydraulic retention time: 152 days.
B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Name Drainage area* Mean flow*
p
Unnamed stream (B-l) 7.6 mi 5.0 cfs
Minor tributaries & 2
immediate drainage - 3.9 mi 2.8 cfs
Totals 11.5 mi2 7.8 cfs
2. Outlet -
Unnamed stream (A-l) 11.9 mi2** 7.8 cfs
C. Precipitation***:
1. Year of sampling: 32.6 inches.
2. Mean annual: 33.1 inches.
t MI Dept. Cons, lake inventory map (1952); mean depth from Fetterolf (1973),
* Drainage areas are accurate within ±5%; mean daily flows for 74% of the
sampling sites are accurate within ±25% and the remaining sites up to
±40%; and mean monthly flows, normalized mean monthly flows, and mean
annual flows are slightly more accurate than mean daily flows.
** Includes area of lake.
*** See Working Paper No. 1, "Survey Methods, 1972".
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III. LAKE WATER QUALITY SUMMARY
Thompson Lake was sampled three times during the open-water season
of 1972 by means of a pontoon-equipped Huey helicopter. Each time,
samples for physical and chemical parameters were collected from
three stations on the lake and usually from two or more depths at
each station (see map, page v). During each visit a single depth-
integrated (15 feet or near bottom to surface) sample was composited
from the stations for phytopiankton identification and enumeration;
and during the second visit, a single five-gallon depth-integrated
sample was composited for algal assay. Also each time, a depth-
integrated sample was collected from each of the stations for chloro-
phyll ^analyses. The maximum depths sampled were 41 feet at station
1, 16 feet at station 2, and 4 feet at station 3.
The results obtained are presented in full in Appendix C, and
the data for the fall sampling period, when the lake essentially was
well-mixed, are summarized below. Note, however, the Secchi disc sum-
mary is based on all values.
For differences in the various parameters at the other sampling
times, refer to Appendix C.
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A. Physical and chemical characteristics:
FALL VALUES
Parameter
Temperature (Cent.)
Dissolved oxygen (mg/1)
Conductivity (ymhos)
pH (units)
Alkalinity (mg/1)
Total P (mg/1)
Dissolved P (mg/1)
N02 + NO- (mg/1)
Ammonia fmg/1)
Secchi disc (inches)
(11/15/72)
Minimum
3.0
7.2
520
7.7
175
0.033
0.020
0.200
0.180
42
Mean
4.7
9.1
538
7.8
179
0.043
0.029
0.212
0.224
ALL VALUES
92
Median
5.2
9.2
538
7.8
177
0.042
0.027
0.210
0.230
96
Maximum
5.5
10.6
560
7.9
185
0.052
0.035
0.230
0.240
152
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B. Biological characteristics:
1. Phytoplankton -
Sampli ng
Date
06/16/72
09/19/72
11/15/72*
Domi
nant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
1.
2.
3.
4. .
5.
Anabaena
Oscillatoria
Asterionella
Characium
Flagellates
Other genera
Total
Cyclotella
Fragilaria
Microcystis
Micractinium
Melosira
Other genera
Total
Fragilaria
Dinobryon
Kirchneriella
Microcystis
Synedra
Other genera
Number
per ml
702
695
29
22
14
7
1,469
10,540
4,144
2,703
1,718
1,441
9.004
29,550
597
443
244
136
81
343
Total
1,844
* It is likely that these results are not representative; the chloro-
phyll a_ concentrations on this date (page 8) indicate that phyto-
plankton were much more numerous.
-------
8
2. Chlorophyll a. -
(Because of instrumentation problems during the 1972 sampling,
the following values may be in error by plus or minus 20 percent.)
Sampling Station Chlorophyll a_
Date Number (yg/1)
06/16/72 01 6.8
02 3.6
03 0.8
09/19/72 01 16.9
02 14.9
03 18.8
11/15/72 01 2.6
02 12.9
03 30.4
C. Limiting Nutrient Study:
There was an apparent gaiji in nutrients in the assay sample
from the time of collection to the beginning of the assay. In-
organic nitrogen apparently increased by 110% and dissolved
phosphorus apparently increased by 67%.
It is not known whether the apparent gain was due to sample
contamination, analytical error, or decomposition of the large
numbers of phytoplankton in the sample (see page 7) with a
resulting release of nutrients. Whatever the cause, the dif-
ferential change in the major nutrients resulted in a shift
from nitrogen limitation in the lake (N/P ratio = 12/1) to
phosphorus limitation in the sample (N/P = 17/1). Consequently,
the assay results are not representative of conditions in the
lake at the time the sample was collected.
-------
The lake data indicate marginal nitrogen limitation in
June (N/P = 13/1) but phosphorus limitation in November
(N/P = 15/1).
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10
IV. NUTRIENT LOADINGS
(See Appendix D for data)
For the determination of nutrient loadings, the Michigan National
Guard collected monthly near-surface grab samples from each of the tribu-
tary sites indicated on the map (page v), except for the high runoff
month of April when three samples were collected. Sampling was begun in
October, 1972, and was completed in October, 1973.
Through an interagency agreement, stream flow estimates for the year
of sampling and a "normalized" or average year were provided by the Michi-
gan District Office of the U.S. Geological Survey for the tributary sites
nearest the lake.
In this report, nutrient loads for sampled tributaries were determined
by using a modification of a U.S. Geological Survey computer program for
calculating stream loadings*. Nutrient loadings for unsampled "minor
tributaries and immediate drainage" ("ZZ" of U.S.G.S.) were estimated by
2
using the nutrient loads, in Ibs/mi /year, at station B-l and multipl^y-
2
ing by the ZZ area in mi .
There are no known point sources impacting Thompson Lake.
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
* See Working Paper No. 1.
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11
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
Ibs P/ % of
Source yr total
a. Tributaries (non-point load) -
Unnamed stream (B-l) 520 54.7
b. Minor tributaries & immediate
drainage (non-point load) - 270 28.4
c. Known municipal STP's - None
d. Septic tanks* - 120 12.6
e. Known industrial - None
f. Direct precipitation** - 40 4.2
Total 950 100.0
2. Outputs -
Lake outlet - Unnamed
stream (A-l) 1,160
3. Net annual P loss - 210 pounds
* Estimated 190 dwellings on lakeshore; see Working Paper No. 1.
** See Working Paper No. 1.
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12
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
Ibs N/ % of
Source yr total
a. Tributaries (non-point load) -
Unnamed stream (B-l) 15,200 50.7
b. Minor tributaries & immediate
drainage (non-point load) - 7,800 26.0
c. Known municipal STP's - None
d. Septic tanks* - 4,460 14.9
e. Known industrial - None
f. Direct precipitation** - 2,520 8.4
Total 29,980 100.0
2. Outputs -
Lake outlet - Unnamed
stream (A-l) 20,800
3. Net annual N accumulation - 9,180 pounds
* Estimated 190 dwellings on lakeshore; see Working Paper No. 1.
** See Working Paper No. 1.
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13
D. Mean Annual Non-point Nutrient Export by Subdrainage Area:
2 ?
Tributary Ibs P/mi /yr Ibs N/mi /yr
Unnamed stream (B-l) 68 2,000
E. Yearly Loading Rates:
In the following table, the existing phosphorus loading
rates are compared to those proposed by Vollenweider (in press).
Essentially, his "dangerous" rate is the rate at which the
receiving waters would become eutrophic or remain eutrophic;
his "permissible" rate is that which would result in the
receiving water remaining oligotrophic or becoming oligo-
trophic if morphometry permitted. A mesotrophic rate would
be considered one between "dangerous" and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with very short hydraulic retention times.
Total Phosphorus Total Nitrogen
Uni ts Total Accumulated Total Accumulated
Ibs/acre/yr 3.6 loss* 114.4 35.0
grams/m2/yr 0.41 - 12.8 3.9
Vollenweider loading rates for phosphorus
(g/m2/yr) based on mean depth and mean
hydraulic retention time for Thompson Lake:
"Dangerous" (eutrophic rate) 0.54
"Permissible" (oligotrophic rate) 0.27
* See discussion, page 2.
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14
V. LITERATURE REVIEWED
Fetterolf, Carlos, 1973. Personal communication (lake morphometry),
MI Dept. of Nat. Resources, Lansing.
Vollenweider, Richard A. (in press). Input-output models. Schweiz.
Z. Hydrol.
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15
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
26AO HOLLOWAY RESERVOIR
26A1 CARO RESERVOIR
26A2 BOAROMAN HYDRO POND
2603 ALLEGAN LAKE
2606 BARTON LAKE
2609 BELLEVILLE LAKE
2610 BETSIE LAKE
2613 BRIGHTON LAKE
2617 LAKE CHARLEVOIX
2618 LAKE CHEMUNG
2621 CONSTANTINE RESERVOIR
2629 FORD LAKE
2631 FREMONT LAKE
2640 JORDAN LAKE
26*3 KENT LAKE
2648 LAKE MACATAWA
26*9 MANISTEE LAKE
2659 MUSKEGON LAKE
2665 PENTWATER LAKE
2671 RANDALL LAKE
2672 ROGERS PONO
2673 ROSS RESERVOIR
2674 SANFORD LAKE
2683 THORNAPPLE LAKE
2685 UNION LAKE
26B8 WHITE LAKE
2691 MONA LAKE
2692 LONG LAKE
MEAN
TOTAL P
0.062
0.117
0.006
0.123
0.121
0.118
0.025
0.109
0.007
0.044
0.027
0.105
0.372
0.180
0.040
0.197
0.018
0.087
0.027
0.246
0.026
0.034
0.016
0.042
0.083
0.027
0.307
0.163
-f ALL VALUti
MEAN
OISS P
0.043
0.022
0.005
0.057
0.086
0.048
0.008
0.073
0.006
0.014
0.008
0.058
0.342 '
0.144
0.015 .
0.120
0.010
0.043
0.017
0.183
0.015
0.021
0.008
0.032
0.064
0.019
0.241
0.148
MEAN
INORG N
1.461
3. 835
0.358
1.168
1.489
1.420
0.273
1.015
0.230
0.132
0.910
1.536
1.406
1.998
0.417
2.358
0.304
0.469
0.496
0.816
0.183
0.460
0.307
1.737
1.252
0.367
0.963
0.749
500-
MEAN SEC
439.375
473.000
363.500
470.222
456.167
465.250
461.667
456.000
351.250
404.333
456.167
456.167
441.667
427.667
455.000
477.600
451.333
436.444
430.667
457.333
435.500
465.333
. 458.750
442.833
455.500
417.778
451.667
418.400
MEAN
CHLORA
10.67U
11.967
1.267
20.311
27.800
28.262
4.567
44.233
3.008
13.483
39.317
14.733
28.500
20.517
33.944
25.600
6.317
9.511
16.083
27.217
8.133
10.383
13.791
14.650
15.667
9.211
27.783
10.067
15-
MIN DO
9.200
9.500
6.600
12.600
14.850
P. 200"
7.400
7.500
9.240
14.800
7.500
14.000
14.800
14.900
13.000
12.200
11.380
14.800
14.800
8.020
9.600
8.200
8.300
10.800
8.200
13.400
14.100
13.600
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
2693 ST LOUIS RESERVOIR
2694 CRYSTAL LAKE
2695 HIGGINS LAKE
2696 HOUGHTON LAKE
2697 THOMPSON LAKE
2698 PERE MARQUETTE LAKE
2699 STRAWBERRY LAKE
MEAN
TOTAL P
0.134
0.009
0.007
0.018
0.043
0.032
0.069
r ALL VALUE.:
MEAN
DISS P
0.093
0.006
0.005
0.008
0.029
0.024
0.050
MEAN
INURG N
1.227
0.164
0.058
0.136
0.436
0.346
0.567
500-
MEAN SEC
462.667
380.000
268.500
420.833
407.889
446.667
419.800
MEAN
CHLOKA
5.583
2.986
1.043
9.217
11.967
11.833
11.117
15-
MIN oa
8.420
13.000
9.400
8.200
14.800
8.600
13.600
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PERCENT Of LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
26AO HOLLOWAY RESERVOIR
26Ai CARO RESERVOIR
26A2 BOAKDMAN HYDRO POND
2603 ALLEGAN LAKE
2606 BARTON LAKE
2609 BELLEVILLE LAKE
2610 BETSIE LAKE
2613 BRIGHTON LAKE
2617 LAKE CHARLEVOIX
2618 LAKE CHEMUNG
2621 CONSTANTINE RESERVOIR
2629 FORD LAKE
2631 FREMONT LAKE
2640 JORDAN LAKE
2643 KENT LAKE
2648 LAKE MACATAWA
26*9 MANISTEE LAKE
2659 MUSKEGON LAKE
2665 PENTWATER LAKE
2671 RANOALL LAKE
2672 ROGERS POND
2673 ROSS RESERVOIR
2674 SANFORO LAKE
2683 THORNAPPLE LAKE
2685 UNION LAKE
26B8 WHITE LAKE
2691 MONA LAKE
2692 LONG LAKE
MEAN MEAN
TOTAL P UISS P
46
29
97
20
23
26
77
31
91
49
71
34
0
11
57
9
80
37
69
6
74
60
86
54
40
66
3
14
( 16)
< 10)
( 34)
( 7)
( 8)
( 9)
( 27)
< 11)
I 32)
( 17)
( 25)
( 12)
( 0)
( 4)
( 20)
( 3)
( 28)
< 13)
< 24)
( 2)
( 26)
I 21)
I 30)
( 19)
( 14)
( 23)
( 1)
( 5)
43
Sft
97
31
20
37
77
23
91
71
83
29
0
11
69
14
74
«.o
63
6
66
57
80
46
26
60
3
9
( 15)
( 19)
I 34)
( 11)
( 7)
( 13)
( 27)
( 8)
I 32)
( 25)
( 29)
( -10)
( '0)
< 4)
( 24)
( 5)
( 26)
( 14)
( 22)
( 2)
( 23)
I 20)
( 28)
I 16)
( 9)
( 21)
( 1)
( 3)
MEAN
INORG N
17
0
69
31
14
20
80
34
83
94
40
11
23
6
63
3
77
54
51
43
86
57
74
9
26
66
37
46
I 6)
( 0)
( 24)
( 11)
( 5)
( 7)
( 28)
( 12)
( 29)
( 33)
( 14)
( 4)
( 8)
( 2)
( 22)
( 1)
( 27)
( 19)
( 18)
( 15)
( 30)
( 20)
( 26).
(. 3)
( 9)
( 23)
( 13)
( 16)
500-
MEAN
57 (
3 (
91 (
6 (
29 (
11 (
17 (
34 (
94 I
86 (
29 (
29 (
54 (
69 (
40 (
0 (
46 (
60 (
66 (
23 I
63 (
9 (
20 (
51 (
37 (
80 (
43 (
77 (
SEC
20)
1)
32)
2)
9)
4)
6)
12)
33)
30)
9)
9)
19)
24)
14)
0)
16)
21)
23)
8)
22)
3)
7)
18)
13)
28)
15)
27)
MEAN 15-
CHLORA MIN 00
60
49
94
29
14
11
86
0
89
46
3
37
9
26
6
23
80
69
31
20
77
63
43
40
34
74
17
66
( 21)
( 17)
( 33)
( 10)
( 5)
( 4)
( 30)
I 0)
( 31)
( 16)
( 1)
( 13)
( 3)
( 9)
( 2)
( 8)
( 28)
( 24)
( 11)
( 7)
( 27)
< 22)
( 15)
( 14)
( 12)
( 26)
( 6)
( 23)
63
54
97
40
3
79
94
90
60
11
90
23
11
0
36
43
46
11
11
86
51
79
71
49
79
31
20
27
( 22)
( 19)
< 34)
< 14)
( 1)
(' 26)
< 33)
< 31)
( 21)
( 21
( 31)
( 8)
( 2)
( 0)
I 12)
< 15)
( 16)
( 2)
( 2)
( 30)
( 18)
( 26)
( 25)
( 17)
( 26)
( 11)
( 7)
( 9)
INOEX
NO
286
189
545
157
103
184
431
212
508
357
316
163
97
123-
271
92
403
271
291
184
417
325
374
249
242
377
123
239
-------
PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
2693 ST LOUIS RESERVOIR
2694 CRYSTAL LAKE
2695 HIGGINS LAKE
2696 HOUGHTON LAKE
2697 THOMPSON LAKE
2698 PERE MARQUETTE LAKE
2699 STRAWBERRY LAKE
MEAN MEAN
TOTAL P OISS P
17
89
94
83
51
63
A3
( 6)
( 3D
( 33)
( 29)
< 18>
( 22)
( 15)
17
89
94
. «6
49
51
34
( 6)
( 31)
( 33)
( 30)
( 17)
( 18)
( 12)
MEAN
INORG N
29 <
89 (
97 (
91 (
60 (
71 (
49 (
10)
31)
34)
32)
21)
25)
17)
500-
MtAN SEC
14
8V
97
71
83
49
74
( 5)
< 31)
( 34)
( 25)
( 29)
( 17)
( 26)
— ALL VALUtS — — —
MEAN 15-
CHLORA MIN DO
83
91
97
71
51
54
57
( 29)
( 32)
( 34)
( 25)
( 18)
( 19)
( 20)
69
36
57
79
11
66
27
( 24)
( 12)
( 20)
( 26)
( 2)
( 23)
( 9)
INDEX
NO
2
-------
APPENDIX B
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR MICHIGAN
a/3/75
LAKE CODE 2697
THOMPSON LAKE
TOTAL DRAINAGE AREA OF LAKE (SO MI)
TRIBUTARY
2697A1
269781
2697Z2
SUB-DRAINAGE
AREA (SO MI) JAN
11.90
7.60
4.30
6.77
4.35
2.46
FEB
11.00
7.08
4.01
11.90
MAR
12.20
7. 84
4.44
APR
14.60
9.36
5.30
MAY
8.56
5.47
3.10
NORMALIZED FLOWS
-------
TRIBUTARY FLOW INFORMATION FOR MICHIGAN
2/3/75
LAKE CODE 2697
THOMPSON LAKE
\
MEAN MONTHLY FLOWS AND DAILY FLOWS(CFS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
2697ZZ
10
11
12
1
2
3
4
5
6
7
8
9
10
72
72
72
73
73
73
73
73
73
73
73
73
73
2.10
4.40
4.00
7.70
3.90
9.50
7.40
4.20
3.20
2.60
1.40
0.80
1.60
FLOW DAY
FLOW DAY
FLOW
-------
APPENDIX C
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 75/02/04
00010
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
72/06/16 15 55 0000 22.5
15 55 0020 9.9
72/09/19 16 35 0000
16 35 0004
16 35 0015
16 35 0021
72/11/15 10 35 0000
10 35 0004 5.5
10 35 0015 5.5
10 35 0025 5.4
10 35 0041 5.2
32217
DATE TIME DEPTH CHLRPHfL
FROM OF A
TO DAY FEET UG/L
72/06/lb 15 55 0000 6.8J
72/09/19 16 35 0000 16.9J
72/11/15 10 35 0000 2.6J
269701
42 37 00.0 083 55 00.0
THOMPSON LAKE
26 MICHIGAN
11EPALES
00300
DO
MG/L
5.4
10.2
9.1
6.6
0.2
9.2
9.2
8.8
7.2
00077
TRANSP
SECCHI
INCHES
152
72
121
00094
CNDUCTVY
FIELD
MICROMHO
410
440
480
460
460
480
560
530
530
520
530
4
00400
PH
SU
7.87
8.20
8.60
8.60
8.28
7.61
7.70
7.70
7.70
7.70
7.70
00410
T ALK
CAC03
MG/L
160
185
165
165
165
168
185
176
175
177
175
2111202
0026
00630
N026.N03
N-TOTAL
MG/L
0.020
0.010
0.040
0.050
0.040
0.030
0.210
0.230
0.220
0.200
0.210
FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.420
0.010K
0.080
0.070
0.070
0.470
0.240
0.230
0.230
0.240
0.240
V 00665
PHOS-TOT
MG/L P
0.046
0.028
0.023
0.021
0.024
0.019
0.042
0.052
0.051
0.051
0.039
00666
PHOS-DIS
MG/L P
0.042
0.010
0*014
0.014
0.013
0.009
0.035
0.034
0.034
0.035
0.030
VALUE KNOWN TO BE LESS
THAN INDICATED
J VALUE KNOWN TO BE IN ERROR
-------
STORET RETRIEVAL DATE 75/02/04
U0010
DATE TIME DEPTH WATER
FROM OF TEMP
TO DAY FEET CENT
72/06/16 16 30 0000 22.3
16 30 0010 20.0
72/09/19 16 25 0000
16 25 0004 22.1
72/11/15 11 00 0000
11 00 0004 4.3
11 00 0016 4.3
32217
DATE TIME DEPTH CHLKPHYL
FROM OF A
TO DAY FEET UG/L
72/06/16 16 30 0000 3.6J
72/09/19 16 25 0000 14.9J
72/11/lb 11 00 0000 12.9J
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
4.8
4.0
9.5
9.5
9.0
120
48
118
420
425
475
475
540
540
535
269702
42 36 30.0 083 55 00.0
THOMPSON LAKE
26 MICHIGAN.
11EPALES
ft
00400
PH
SU
7.70
7.58
8.65
8.65
7.90
7.9U
7.90
00410
T ALK
CAC03
MG/L
164
164
166
165
179
176
177
2111202
0010
00630
N02&N03
N-TOTAL
MG/L
0.030
0.660
0.060
0.050
0.210
0.210
0.200
V
FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.530
0.800
0.070
0.080
0.230
0.230
0.230
00665
PHOS-TOT
M6/L P
0.066
0.073
0.023
0.027
0.036
0.048
0.041
00666
PHOS-OIS
1
MG/L P
0.058
0.073
0.014
0.019
.0.025
'0.024
0.029
J VALUE KNOWN TO BE IN £
-------
STORE! RETRIEVAL DATE 75/02/04
269703
42 36 00.0 083 54 30.0
THOMPSON LAKE
26 MICHIGAN
11EPALES
DATE
FROM
TO
72/06/16
72/09/19
72/11/15
TIME DEPTH
OF
DAY FEET
16 55 0000
16 00 0000
16 00 0004
11 20 0000
11 20 0004
00010
WATER
TEMP
CENT
22.5
21.8
3.0
00300
DO
MG/L
5.6
9.1
10.6
00077
TRANSP
SECCHI
INCHES
96
42
60
00094
CNDUCTVY
FIELD
MICROMHO
415
480
470
550
540
4
00400
PH
SU
7.80
8.55
8.55
7.90
7.90
00410
T ALK
CAC03
MG/L
161
170
167
184
182
2111202
0008
00630
N02&N03
N-TOTAL
MG/L
0.030
0.060
0.050
0.220
0.210
FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.470
0.100
0.090
0.190
0.160
00665
PHOS-TOT
MG/L P
0.048
0.034
0.060
0.033
0.042
00666
PHOS-DlS
MG/L P
0.044
0.018
0.018
0.020
0..0Z5
32217
DATE TIME DEPTH CHLRPHYL
FROM OF A
TO DAY FEET UG/L
72/06/16 16 55 0000 0.8J
72/09/19 16 00 0000 18.8J
72/11/15 11 20 0000 30.4J
J VALUE KNOWN TO HE IN ERROR
-------
APPENDIX D
TRIBUTARY DATA
-------
STORET RETRIEVAL DATE 75/02/04
LS2697A1
42 37 30.0 083 55 30.0
UNNAMED OUTLET CHEEK
26 7.5 HOWELL
0/TnOMPSON LAKE
ST Hfcir 59 BRDG Nrt CORNER OF LAKE
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
72/10/29
72/12/02
73/01/07
73/02/04
73/03/04
73/04/06
73/04/21
73/0*/22
73/06/0?
73/07/07
73/08/04
73/09/08
73/10/13
00630 00625
TIME DEPTH N02MMOJ TOT KJEL
OF N-TOTAL N
DAY FEET
09
09
07
08
08
08
12
10
12
11
14
13
08
45
55
40
15
30
00
10
50
45
30
30
00
30
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
.610
.010K
.294
.20U
.336
.100
.410
.079
.500
.070
.069
.190
.315
MG/L
4.
0.
1.
1.
0.
C.
1.
1.
1.
0.
1.
1.
1.
550
930
J50
050
H30
750
ISO
153
470
940
200
?00
750
00610 00671 00665
MH3-N PHOS-OIS HhOS-TOT
TOTAL ORThO
MG/L
0.
0.
0.
0.
\j m
0.
0.
0.
0.
0.
0.
0.
0.
310
016
138
105
i>9o
025
176
058
270
044
040
168
375
MG/L P
0
G
0
0
0
0
0
0
0
0
0
0
0
.040
.022
.022
.013
.025
.007
.023
.011
.054
.013
.017
.018
.008
MG/L P
0.1 2b
0.047
0.056
0.055
0.035
0.035
O.U65
0.065
0.115
0.050
0.085
0.055
0.180
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 75/02/04
269781 LS2697B1
42 36 30.0 083 53 30.0
UNNAMED INLET CHEEK
26 7.5 HOWELL
I/THOMPSON LAKE
EAGER HO dRDG N OF EARL LAKE
11EPALES 3111204
4 0000 FEET
DATE
FROM
TO
72/10/29
72/12/02
73/01/07
73/02/04
73/03/04
73/04/06
73/04/21
73/04/22
73/05/20
73/06/02
73/07/07
73/08/04
73/09/08
73/10/13
00630 00625
TIME DEPTH N02&N03 TOT KJEL
OF N-TOTAL N
DAY FEET
10
10
08
08
08
08
12
10
14
12
11
13
12
08
20
00
00
30
45
30
00
00
20
30
40
50
45
40
MG/L
0
0
0
0
C
0
0
0
0
0
0
0
0
0
.180
.180
.176
.200
.390
.110
.020
.073
.010K
.023
.048
.060
.034
.031
MG/L
2.
0.
0.
1.
0.
1.
2.
1.
1.
1.
1.
1.
1.
1.
600
965
940
500
990
100
000
300
260
760
550
680
150
050
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
147
014
030
063
154
036
042
026
027
054
077
070
042
085
MG/L
0.
P
009
0.005K
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
005K
007
015
005
009
007
008
010
018
025
021
006
MG/L P
0.040
0.038
0.046
0.035
0.055
0.030
0.050
0.050
0.050
0.045
0.055
0.060
0.105
0.070
DEPTH
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |