U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
PAWNE RESERVOIR
LANCASTER COUNTY
NEBRASM
EPA REGION VII
WORKING PAPER No, 560
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
699-440
-------
REPORT
ON
PAWNE RESERVOIR
LANCASTER COUNTY
NEBRASM
EPA REGION VII
WORKING PAPER No, 560
WITH THE COOPERATION OF THE
NEBRASKA DEPARTMENT OF ENVIRONMENTAL CONTROL
AND THE
NEBRASKA NATIONAL GUARD
AUGUST, 1376
-------
CONTENTS
Page
Foreword i i
List of Nebraska Study Reservoirs iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 3
III. Lake Water Quality Summary 4
IV. Nutrient Loadings 8
V. Literature Reviewed 12
VI. Appendices 13
-------
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration commitment to investigate the nation-
wide threat of accelerated eutrophication to freshwater 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)], 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.
-------
m
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
freshwater 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 Nebraska Department of
Environmental Control for professional involvement, to the
Nebraska National Guard for conducting the tributary sampling
phase of the Survey, and to those wastewater treatment plant
operators who voluntarily provided effluent samples and flow
data.
The staff of the Water Pollution Control Division, Department
of Environmental Control, provided invaluable lake documentation
and counsel during the Survey, reviewed the preliminary reports,
and provided critiques most useful in the preparation of this Working
Paper series.
Major General Francis L. Winner, the Adjutant General of Nebraska,
and Project Officer Colonel Burl M. Johnson, who directed the volun-
teer efforts of the Nebraska National Guardsmen, are also gratefully
acknowledged for their assistance to the Survey.
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iv
NATIONAL EUTROPHICATION SURVEY
STATE OF NEBRASKA
RESERVOIR NAME COUNTY
Branched Oak Lancaster
Harlan County Harlan
Harry D. Strunk Frontier
Hugh Butler Frontier, Red Willow
Johnson Dawson, Gosper
McConaughy Keith
Pawnee Lancaster
Sherman Sherman
Swanson Hitchcock
-------
Neb.
I
Map Location
PAWNEE RESERVOIR
Tributary Sampling Site
Lake Sampling Site
Drainage Area Boundary
Land Subject To Inundation
i 2 3 < Km.
i i i i
2 Mi.
Scale
T
47SO'_
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PAWNEE RESERVOIR
STORE! NO. 3107
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Pawnee Reservoir is eutrophic.
It ranked third in overall trophic quality when the nine
Nebraska reservoirs sampled in 1974 were compared using a
combination of six parameters*. Two of the reservoirs had
less median total phosphorus, six had less median dissolved
phosphorus, four had less median inorganic nitrogen and mean
chlorophyll a_, and two had greater mean Secchi disc trans-
parency.
Survey limnologists did not observe aquatic vegetation or
surface concentrations of algae during their three visits to
Pawnee Reservoir. However, it is reported that the reservoir
has frequent blooms of blue-green algae and extensive areas
of rooted aquatic plants (Ketelle and Uttormark, 1971).
B. Rate-Limiting Nutrient:
Because of a change in nutrients in the samples, the
algal assay results are not representative of conditions
in the reservoir at the times the samples were collected
(04/17/74 and 09/26/74).
The reservoir- data indicate phosphorus limitation at
station 1 in April but nitrogen limitation at station 2.
Nitrogen limitation is indicated at both stations in September.
See Appendix A.
-------
2
C. Nutrient Controllabiltiy:
1. Point sourcesNo known point sources impacted
Pawnee Reservoir during the sampling year. Nonetheless,
the present loading of 0.73 kg P/m2/yr is three times that
proposed by Vollenweider (Vollenweider and Dillon, 1974) as
a eutrophic loading (see page 11).
2. Non-point sourcesThe phosphorus contributions of
the two gaged tributaries amounted to 71.9% of the total
load reaching Pawnee Reservoir during the sampling year.
The estimated phosphorus load from the ungaged drainage areas
amounted to 25.8% of the total load.
The phosphorus export rates of the two gaged tributaries
(see page 10) compare well with those of unimpacted Oak Creek and
Middle Oak Creek, tributaries of nearby Branched Oak Reservoir*
(26 and 23 kg/km2yr, respectively).
Because of the lack of point sources and agricultural prac-
tices in the watershed (Sheets, 1975), reduction of nutrient
inputs is dependent on improved land-use practices in the Pawnee
Reservoir drainage (Hergenrader, 1974; Hergenrader and Hammer,
1973; Hammer and Hergenrader, 1974).
* Working Paper No. 554.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Lake Morphometry :
1. Surface area: 2.99 kilometers2.
2. Mean depth: 3.7 meters.
3. Maximum depth: 11.0 meters.
4. Volume: 11.063 x 106 m3.
5. Mean hydraulic retention time: 2.9 years (based on outflow)
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Middle Creek 37.3 0.10
Unnamed Stream B-l 23.1 0.06
Minor tributaries &
immediate drainage - 21.8 0.07
Totals 82.2 0.23
2. Outlet -
Middle Creek 85.2** 0.12
C. Precipitation***:
1. Year of sampling: 60.4 centimeters.
2. Mean annual: 67.7 centimeters.
t Table of metric conversionsAppendix B.
tt Adamovich, 1975; Hartung, 1974.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of reservoir.
*** See Working Paper No. 175.
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4
III. LAKE WATER QUALITY SUMMARY
Pawnee Reservoir was sampled three times during the open-water
season of 1974 by means of a pontoon-equipped Huey helicopter. Each
time, samples for physical and chemical parameters were collected from
a number of depths at two stations on the reservoir (see map, page
v). During each visit, a single depth-integrated (4.6 m or near bottom
to surface) sample was composited from the stations for phytoplankton
identification and enumeration; and during the first and third visits,
a single 18.9-liter depth-integrated sample was composited for algal
assays. Also each time, a depth-integrated sample was collected from
each of the stations for chlorophyll a_ analysis. The maximum depths
sampled were 7.9 meters at station 1 and 6.1 meters at station 2.
The sampling results are presented in full in Appendix D and are
summarized in the following table (the July nutrient samples were not
properly preserved and were not analyzed).
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A. SUMMARY OF PHYSICAL AND
CHEMICAL CHARACTERISTICS FOR PAWNEE LAKE
STORET CODE 3107
PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNOCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P (MG/L)
N02*N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UG/L)
SECCH1 (METERS)
1ST SAMPLING ( 4/17/74) 2ND SAMPLING ( 7/ 2/74)
2 SITES 2 SITES
RANGE MEAN MEDIAN RANGE MEAN MEDIAN
9.7 - 10.7 10.3 10.3 23.5 - 23.7. 23.6 23.6
10.2 - 10.6 10.4 10.4 6.2 - 7.2 6.7 6.6
336. - 345. 340. 340. 475. - 477. 476. 476.
*** -***»*»*** 7.8 - 8.1 8.0 8.0
206. - 234. 221. 223. -*****«***»******
0.007
0.060
0.060
0.700
0. 120
0.760
5.7
1.5
- u.ujr
- 0.012
- 0.080
- 0.080
- 0.800
0.160
- 0.880
7.2
2.3
u.uey
0.009
0.067
0.070
0.767
0.137
0.833
6.4
1.9
0.800 » _«*********»«*
6.4 6.0 - 17.7 11.8 11.8
1.9 0.6 - 0.9 0.8 0.8
3RD SAMPLING ( 9/26/74)
2 SITES
RANGE MEAN MEDIAN
17.3 - 17.6 17.5 17.5
7.2 - 9.6 8.4 8.5
383. - 385. 384. 384.
7.6 - 7.9 7.8 7.8
185. - 276. 227. 220.
0.029
0.050
0.130
1.200
0.190
1.250
21.1
0.9
- 0.030
- 0.060
- 1.400
- 0.350
- 1.460
- 34.5
0.9
0.057
1.283
0.263
1.340
27.8
0.9
0.030
0.060
.203
1.300
0.260
1.360
27.8
0.9
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B. Biological characteristics:
1. Phytoplankton -
Sampli ng
Date
04/17/74
07/02/74
09/26/74
2. Chlorophyll a_ -
Sampling
Date
04/17/74
07/02/74
Dominant
Genera
1. Dinobryon sp.
2. Cryptomonas sp.
3. Asterionella sp.
4. Stephanodiscus sp.
5. Flagellates
Other genera
Total
1. Cryptomonas sp.
2. Melosira S£.
3. Flagellates
4. Schroederia s_p_.
5. Anabaena sp.
Other genera
Total
1. Melosira sp.
2. Aphanizomenon sp.
3. Microcystis sp.
4. Cryptomonas sp.
5. Stephanodiscus sp.
Other genera
Total
Station
Number
1
2
1
2
Algal Units
per ml
849
310
212
147
82
97
1,697
634
465
422
338
296
634
2,789
2,055
Chlorophyll a
(ug/D
7.2
5.7
6.0
17.7
09/26/74
1
2
21.1
34.5
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7
C. Limiting Nutrient Study:
There was a significant change in nutrients in the assay
samples from the times of collection to the beginning of the
assays, and the results are not considered representative of
the conditions in the reservoir at the times of sampling.
Following is a tabulation of the mean inorganic nitrogen/
orthophosphorus ratios for each of the stations and sampling
times with the indicated limiting nutrient in parentheses
(the July nutrient samples were not preserved properly and were
not analyzed).
Station 04/17/74 07/02/74 09/26/74
1 18/1 (P) - 11/1 (N)
2 12/1 (N) - 6/1 (N)
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8
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Nebraska National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page v). Sampling was begun in
August, 1974, and was completed in July, 1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the Nebraska District Office of the U.S. Geological Survey for the
tributary sites nearest the reservoir.
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 loads shown are
those measured minus point-source loads, if any.
Nutrient loads for unsampled "minor tributaries and immediate
drainage" ("ZZ" of U.S.G.S.) were estimated using the means of the
nutrient loads, in kg/km2/year, at stations A-2 and B-l and multiplying
the means by the ZZ area in km2.
No known point sources impacted Pawnee Reservoir during the
sampling year.
* See Working Paper No. 175.
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9
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total
a. Tributaries (non-point load) -
Middle Creek 975 44.5
Unnamed Stream B-l 600 27.4
b. Minor tributaries & immediate
drainage (non-point load) - 565 25.8
c. Known municipal STP's - None
d. Septic tanks - None
e. Known industrial - None
f. Direct precipitation* - 50 2.3
Total 2,190 100.0
2. Outputs -
Lake outlet - Middle Creek 555
3. Net annual P accumulation - 1,635 kg.
* See Working Paper No. 175.
-------
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source %r total
a. Tributaries (non-point load) -
Middle Creek 5,970 35.4
Unnamed Stream B-l 4,035 23.9
b. Minor tributaries & immediate
drainage (non-point load) - 3,650 21.6
c. Known municipal STP's - None
d. Septic tanks - None
e. Known industrial - None
f. Direct precipitation* - 3.230 19.1
Total 16,885 100.0
2. Outputs -
Lake outlet - Middle Creek 5,560
3. Net annual N accumulation - 11,325 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Middle Creek 26 160
Unnamed Stream B-l 26 175
* See Working Paper No. 175.
-------
11
E. Yearly Loads:
In the following table, the existing phosphorus loadings
are compared to those proposed by Vollenweider (Vollenweider
and Dillon, 1974). Essentially, his "dangerous" loading is
one at which the receiving water would become eutrophic or
remain eutrophic; his "permissible" loading is that which
would result in the receiving water remaining oligotrophic
or becoming oligotrophic if morphometry permitted. A meso-
trophic loading would be considered one between "dangerous"
and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulated Total Accumulated
grams/m2/yr 0.73 0.55 5.6 3.8
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Pawnee Reservoir:
"Dangerous" (eutrophic loading) 0.24
"Permissible" (oligotrophic loading) 0.12
-------
12
V. LITERATURE REVIEWED
Adamovich, Ted, 1975. Personal communication (morphometric data).
NE Dept. of Env. Contr., Lincoln.
Hammer, Mark J., and Gary L. Hergenrader, 1974. Eutrophication of
small reservoirs in eastern Nebraska. Trans. NE Acad. of Sci.,
vol. II.
Hartung, Ray, 1974. Personal communication (morphometric data).
NE Dept. of Env. Contr., Lincoln.
Hergenrader, G. L. 1974. Eutrophication in the Salt Valley reser-
voirs. Final Rept. to U.S. Army Corps of Engineers, Lincoln.
Hergenrader, Gary L., and Mark. J. Hammer, 1973. Eutrophication of
small reservoirs in the Great Plains. In: Man-made lakes: Their
problems and environmental effects (W. C. Ackerman, G. F. White,
and E. B. Worthington, eds).Geophys. Monogr. Ser., vol. 17.
Ketelle, Martha J., and Paul D. Uttormark, 1971. Problem lakes in
the United States. EPA Water Poll. Contr. Res. Ser., Proj.
#16010 EHR, Wash., DC.
Sheets, Wes, 1975. Personal communication (watershed information).
NE Game & Parks Comm., Lincoln.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Natl. Res. Council of Canada Publ. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
-------
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
3101 BRANCHED OAK
3102 HARLAN COUNTY RESERVOIR
3103 HARRY D. STRUNK (MEOIC1N
3104 HUGH BUTLER (RED UlLLO*)
3105 JOHNSON RESERVOIR
3106 LAKE MCCONAUGHY
3107 PAWNEE LAKE
3108 SHERMAN COUNTY RESERVOIR
3110 SHANSON RESERVOIR
MEDIAN
TOTAL P
0.044
0.112
0.064
0.061
0.075
0.027
0.060
0.067
0.067
MEDIAN
INORG N
0.070
0.365
0.460
0.090
0.340
0.585
0.175
0.090
0.090
500-
MEAN SEC
456.444
476.111
470.500
468.675
477.667
40V. 555
453.000
451.167
466. J33
MEAN
CHLORA
17.033
27.822
14.367
16.612
26.133
8.644
15.367
6.717
14.450
15-
MIN DO
9.400
12.200
14.200
14.400
8.600
11.400
8.800
11.800
11.000
MEDIAN
DISS ORTHO P
0.013
0.061
0.009
0.014
0.00V
0.004
0.020
0.050
0.016
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PERCENT OF LAKES »(ITH HIGHER VALUES (NUMBER OF LAKES *ITH HIGHEH VALUES)
LAKE
CODt LAKE NAME
3101 BRANCHED OAK
3102 HARLAN COUNTY RESERVOIK
3103 HARRY D. STRUNK (MEOICIN
3104 HUGH BUTLER (RED WILLO*)
3105 JOHNSON RESERVOIri
3106 LAKE MCCONAUGHY
3107 PAWNEE LAKE
3108 SHERMAN COUNTY RESERVOIR
3110 SWANSON RESERVOIR
MEDIAN
TOTAL P
138 <
0 (
50 (
63 (
13 (
100 <
75 (
38 (
25 (
7)
0)
4)
5)
1)
8)
6)
3)
2)
MEDIAN
INO«G
100 (
25 (
13 (
75 (
38 (
0 (
50 (
75 (
75 (
N
8)
2)
1)
5)
3)
0)
4)
5)
5)
500-
MEAN SEC
63 (
13 (
25 (
38 (
0 (
100 (
75 (
68 (
50 (
5)
1)
2)
3)
0)
8)
6)
7)
4)
MEAN
CHLORA
25 (
0 (
75 (
38 (
13 (
88 (
50 (
100 (
63 (
2)
0)
6)
3>
1)
7)
4>
8)
5)
15-
MIN DO
75 (
25 (
13 (
0 (
100 (
50 (
88 (
38 (
63 (
6)
2)
1)
0)
8)
4)
7)
3)
5)
MEuI AN
DISS OKTrtO P
63 (
0 <
81 (
50 (
81 (
100 (
25 t
13 (
38 (
5)
0)
6)
4)
6)
8)
2)
1)
3)
1NUEX
NO
<«1<*
63
257
26«
245
4J8
363
3'i2
314
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LAKES RANKED BY INDEX NOS.
RANK LAKE CODE LAKE NAME INDEX NO
1 3106 LAKE MCCONAUGHY 438
^ 3101 BRANCHED OAK 414
3 3107 PAWNEE LAKE 363
4 3108 SHERMAN COUNTY RESERVOIR 353
b 3110 SWANSON KESERVOlrt 314
6 310^ HUGH BUTLER (RED WILLOW) ?6<»
7 3103 HARRY D. STRUNK (MEDICIN 357
8 3105 JOHNSON RESERVOIR 345
9 3102 HAPLAN COUNTY RESERVOIR 63
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APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x 10 = acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 = cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR NEBRASKA
12/23/75
TOTAL
TRIBUTARY
3107A1
3107A2
3107B1
3107ZZ
DRAINAGE AREA OF LAKE (SO KM)
SUB-DRAINAGE
AREA (SO KM) JAN
85.2
37.3
23.1
24.9
0.11
0.08
0.05
0.05
FEB
0.14
0.09
0.05
0.06
85.
MAR
0.23
0.19
0.11
0.12
2
APR
0.31
0.11
0.07
0.07
MAY
0.23
0.16
0.10
0.11
NORMALIZED FLOWS (CMS)
JUN JUL AUG
0.15
0.21
0.13
0.14
0.03
0.05
0.03
0.03
0.01
0.04
0.03
0.03
SEP
0.01
0.05
0.03
0.03
OCT
0.15
0.11
0.07
0.07
NOV
0.05
0.06
0.04
0.04
DEC
0.05
0.05
0.03
0.03
MEAN
0.12
0.10
0.06
0.07
TRIBUTARY MONTH YEAR
3107A1
MEAN FLOW DAY
3107A2
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
74
74
74
74
74
75
75
75
75
75
75
75
74
74
74
74
74
75
75
75
75
75
75
75
0.0
0.0
0.0
0.0
0.03
0.03
0.11
0.25
0.28
0.17
0.23
0.03
0.14
0.01
0.06
0.03
0.05
0.06
0.07
0.16
0.15
0.11
0.17
0.05
24
21
19
19
7
2
IS
30
4
7
12
24
21
19
19
7
19
2
15
30
<»
7
12
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 85.2
SUM OF SUB-DRAINAGE AREAS = 85.2
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TOTAL FLOW IN
TOTAL FLOW OUT
2.72
1.48
FLOW DAY
0.00
0.01
0.00
0.00
0.00
0.05
0.10
0.31
0.25
0.07
0.00
0.04
0.03
0.03
0.03
0.03
0.03
0.05
0.03
0.09
0.07
0.04
0.04
FLOW DAY
FLOW
-------
TRIBUTARY FLOW INFORMATION FOR NEBRASKA
12/23/75
LAKE CODE 3107
PAWNEE LAKE
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
310781
3107ZZ
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
74
74
74
74
74
75
75
75
75
75
75
75
74
74
74
74
74
75
75
75
75
75
75
75
0.08
0.01
0.04
0.01
0.03
0.04
0.05
0.10
0.09
0.07
0.11
0.03
0.09
0.01
0.04
0.02
0.03
0.04
0.05
0.11
0.10
0.07
0.12
0.03
24
21
19
19
7
19
2
15
30
4
7
12
24
21
19
19
7
19
2
15
30
4
7
12
FLOW DAY
0.03
0.03
0.03
0.03
0.03
0.03
0.01
0.06
0.03
0.02
0.03
0.01
0.03
0.02
0.03
0.03
0.03
0.03
0.02
0.04
0.05
0.03
0.03
0.02
FLOW DAY
FLOW
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORE! RETRIEVAL DATE 75/11/07
310701
40 50 22.0 096 52 02.0
PAWNEE LAKE
31109 NEBRASKA
DATE
FROM
TO
74/04/17
74/07/02
74/09/26
DATE
FROM
TO
74/04/17
74/07/02
74/09/26
TIME DEPTH
OF
DAY FEET
14 20 0000
14 20 0005
14 20 0017
12 15 0000
12 15 0005
12 15 0015
12 15 0026
15 00 0000
15 00 0005
15 00 0015
TIME DEPTH
OF
DAY FEET
14 20 0000
14 20 0005
14 20 0017
12 15 0000
12 15 0007
15 00 0000
15 00 0005
15 00 0006
15 00 0015
00010
WATER
TEMP
CENT
10.0
9.9
9.7
23.5
23.5
23.5
23.5
17.4
17.4
17.3
00665
PHOS-TOT
MG/L P
0.032
0.029
0.028
O.OB4
0.084
0.085
11EPALES 2111202
3 0022 FEET DEPTH
00300 00077 00094 00400 00410 00610 00625 00630 00671
DO TRANSP CNDUCTVY PH T ALK NH3-N TOT KJEL N02&N03 PHOS-DIS
SECCHI FIELD CAC03 TOTAL N N-TOTAL ORTHO
MG/L INCHES MICROMHO SU MG/L MG/L MG/L MG/L MG/L P
90 337 224 0.080 0.600 0.080 0.010
10.2 338 234 0.080 0.700 0.070 0.009
10.2 336
6.2 36 475 7.80
6.4 475 7.80
6.4 475 7.90
6.4 475 8.00
7.2 36 384 7.65
7.8 . 385 7.66
7.2 384 7.64
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
7.2
6.0
1.0
21.1
1.0
206 0.080 0.800 0.070 0.007
185 0.290 1.300 0.060 0.029
192 0.280 1.200 0.050 0.030
191 0.280 1.200 0.050 0.030
~ "~ ' "
-------
STORE! RETRIEVAL DATE 75/11/07
310702
40 51 00.0 096 52 32.0
PAWNEE LAKE
31109 NEBRASKA
11EPALES
DATE
FROM
TO
74/04/17
74/07/02
74/09/26
DATE
FROM
TO
74/04/17
74/07/02
74/09/26
TIME DEPTH
OF
DAY FEET
14 00 0000
14 00 0005
14 00 0017
11 50 0000
11 50 0005
11 50 0015
11 50 0020
14 45 0000
14 45 0005
14 45 0010
TIME DEPTH
OF
DAY FEET
14 00 0000
14 00 0005
14 00 0017
11 50 0000
11 50 0004
14 45 0000
14 45 0005
14 45 0007
14 45 0010
00010
WATER
TEMP
CENT
10.7
10.7
10.6
23.7
23.7
23.7
23.7
17.6
17.6
17.6
00665
PHOS-TOT
MG/L P
0.021
0.037
0.030
0.102
0.109
0.099
00300
DO
MG/L
10.6
10.6
6.8
7.0
7.2
7.0
9.2
9.2
9.6
32217
CHLRPHYL
A
UG/L
5.7
17.7
34.5
00077
TRANSP
SECCHI
INCHES
60
24
36
00031
INCDT LT
REMNING
PERCENT
1.0
1.0
00094
CNDUCTVY
FIELD
MICROMHO
345
344
342
476
477
476
476
384
383
384
3
00400
PH
SU
8.10
8.10
8.00
8.00
7.90
7.91
7.90
00410
T ALK
CAC03
MG/L
222
224
218
272
276
248
2111202
0022
00610
NH3-N
TOTAL
MG/L
0.060
0.060
0.060
0.130
0.130
0.130
FEET DEPTH
00625 00630
TOT KJEL N02&N03
N N-TOTAL
MG/L MG/L
0.700 0.060
0.800 0.060
0.800 0.060
1.400 0.060
1.300 0.060
1.300 0.060
00671
PHOS-DIS
ORTHO
MG/L P
0.008
0.012
0.009
0.029
0.030
0.030
-------
APPENDIX E
TRIBUTARY DATA
-------
STORE! RETRIEVAL DATE 76/01/27
3107A1
40 50 20.0 096 51 52.0
MIDDLE CREEK
31101 7.5 EMERALD
0/PAHNEE LAKE
BANK SAMPLE AT PAWNEE LK DAM SPILLWAY
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
74/08/24
74/09/21
74/10/19
74/11/19
74/12/07
75/02/02
75/03/15
75/04/30
75/05/04
75/06/07
75/07/12
TIME DEPTH
OF
DAY FEET
15 00
10 45
14 10
10 30
14 00
09 15
11 25
14 25
10 40
10 00
15 00
00630
N02&N03
N-TOTAL
MG/L
0.004
0.024
0.024
0.048
0.010
0.375
0.064
1.300
0.005
0.005
0.060
00625
TOT KJEL
N
MG/L
0.600
0.500
0.400
1.350
0.300
1.100
0.850
1.400
0.900
0.750
2.200
00610
NH3-N
TOTAL
MG/L
0.015
0.010
0.025
0.063
0.015
0.080
0.073
0.060
0.110
0.030
0.045
00671
PHOS-DIS
ORTHO
MG/L P
0.120
0.105
0.115
0.072
0.125
0.030
0.015
0.190
0.005
0.010
0.040
00665
PHOS-TOT
MG/L P
0.180
0.145
0.150
0.090
0.170
0.025
0.040
0.380
0.280
0.060
0.150
-------
STORE! RETRIEVAL DATE 76/01/27
3107A2
40 52 44.0 096 55 45.0
MIDDLE CREEK
31 7.5 GARLAND
T/PAWNEE LAKE
SEC RO BRDG 9 MI ESE OF SEWARO
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
74/08/24
74/09/21
74/10/19
74/11/19
74/12/07
75/01/19
75/02/02
75/03/15
75/04/30
75/05/04
75/06/07
75/07/12
TIME DEPTH
OF
DAY FEET
14 26
10 15
13 40
10 15
14 31
08 50
10 50
12 00
14 05
10 15
09 30
14 22
00630
N02&N03
N-TOTAL
MG/L
1.320
1.100
0.312
0.730
0.900
1.010
1.050
0.918
0.620
0.420
0.690
0.680
00625
TOT KJEL
N
MG/L
0.400
0.800
0.900
0.500
0.500
1.000
0.600
0*750
1.830
0.900
1.600
1.950
00610
NH3-N
TOTAL
MG/L
0.040
0.045
0.045
0.065
0.092
0.272
0.124
0.086
0.080
0.050
0.330
0.067
00671
PHOS-DIS
ORTHO
MG/L P
0.390
0.310
0.260
0.200
0.085
0.144
0.144
0.135
0.200
0.400
0.305
00665
PHOS-TOT
MG/L P
0.390
0.380
0.320
0.240
0.250
0.180
0.260
0.250
0.350
0.540
0.420
-------
STORET RETRIEVAL DATE 76/01/27
3107B1
40 53 12.0 096 54 53.0
UNNAMED STREAM
31 7.5 GARLAND
T/PAWNEE LAKE
US HWY 34 BRDG 9 MI E OF SEWARD
11EPALES 2111204
4 0000 FEET DEPTH
DATE TIME DEPTH
FROM OF
TO DAY FEET
74/08/24 14 02
74/09/21 10 00
74/10/19 13 30
74/11/19 10 00
74/12/07 14 20
75/01/19 08 35
75/02/02 09 45
75/03/15 11 50
75/04/30 14 00
75/05/04 10 05
75/06/07 09 30
75/07/12 14 00
00630
N02&N03
N-TOTAL
MG/L
0.660
0.650
0.352
0.736
0.820
0.960
1.050
0.915
0.005
0.810
0.820
0.600
00625
TOT KJEL
N
MG/L
0.400
3.200
1.900
0.900
0.900
0.900
0.400
1.200
1.600
1.600
0.750
1.800
00610
NH3-N
TOTAL
MG/L
0.040
0.235
0.095
0.090
0.100
0.224
0.124
0.104
0.025
0.070
0.100
0.160
00671
PHOS-DIS
ORTHO
MG/L P
0.345
0.280
0.250
0.190
0.165
0.128
0.128
0.135
0.005K
0.200
0.320
0.340
00665
PHOS-TOT
MG/L P
0.345
0.460
0.440
0.220
0.290
0.170
0.190
0.240
0.050
0.300
0.400
0.520
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |