U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
SWNSON RESERVOIR
HITCHCOCK COUNIY
NEBRASKA
EPA REGION VII
WORKING PAPER No, 562
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
699-440
-------
REPORT
ON
SWNSON RESERVOIR
HITCHCXK COUNTY
NEBRASM
EPA REGION VII
WORKING PAPER No, 562
WITH THE COOPERATION OF THE
NEBRASKA DEPARTMENT OF ENVIRONMENTAL CONTROL
AND THE
NEBRASKA NATIONAL GUARD
AUGUST, 1976
-------
CONTENTS
Page
Foreword ii
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 13
VI. Appendices 14
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11
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
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Map Location
SWANSON RESERVOIR
® Tributary Sampling Site
X Lake Sampling Site
• Sewage Treatment Facility
"f Land Subject to Inundation
Bonny
' ' S i ' ' i
Scale
I Mi.
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SWANSON RESERVOIR
STORE! NO. 3110
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Swanson Reservoir is eutrophic. It
ranked fifth in overall trophic quality when the nine Nebraska
reservoirs sampled in 1974 were compared using a combination of
six parameters*. Five of the reservoirs had less and one had the
same median total phosphorus, five had less median dissolved ortho-
phosphorus, one had less and two had the same median inorganic
nitrogen, three had less mean chlorophyll a^ and four had greater
mean Secchi disc transparency. Depression of dissolved oxygen
with depth occurred at both sampling stations in late June.
Survey limnologists did not observe any macrophytes or sur-
face concentrations of algae during sampling visits.
B. Rate-Limiting Nutrient:
Because of a significant loss of phosphorus in the samples
between the time of collection and the beginning of the assays,
the algal assay results are not considered to be representative
of conditions in the reservoir at the time the sample was taken
(04/15/74).
The reservoir data indicate nitrogen limitation at both sampling
stations in April and September.
C. Nutrient Controllability:
1. Point sources—The phosphorus contribution of known point
* See Appendix A.
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2
sources amounted to 9.0% of the total load reaching Swanson
Reservoir during the sampling year. Nearly all this load came
from the wastewater treatment plants at Benkelman and Stratton
(4.2% and 4.8%, respectively). Septic tanks serving shoreline
dwellings were estimated to have contributed less than 0.1%.
The present phosphorus loading of 0.87 g/m2/yr is about two
times that proposed by Vollenweider (Vollenweider and Dillon,
1974) as a eutrophic loading (see page 12); and, considering the
relatively small phosphorus contribution of the point sources,
it is not likely that point-source control would significantly
improve the trophic condition of Swanson Reservoir.
2. Non-point sources—It is estimated that non-point sources
contributed 91.0% of the total phosphorus load during the sampling
year. The Republican River contributed 86.3%, and the ungaged
tributaries were estimated to have contributed 2.7% of the total
load.
The phosphorus export rate of the Republican River (2 kg P/km2/yr)
was considerably less than the export rate of a tributary of nearby
Hugh Butler Reservoir* (13 kg/km2/yr) and a tributary of Harry
D. Strunk Reservoir** (27 kg/km2/yr).
* Working Paper No. 557.
** Working Paper No. 556.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS1"
A. Lake Morphometry :
1. Surface area: 20.13 kilometers2.
2. Mean depth: 7.3 meters.
3. Maximum depth: 18.0 meters.
4. Volume: 146.949 x 106 m3.
5. Mean hydraulic retention time: 1.4 years (based on outflow)
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km2)* (m3/sec)*
Republican River 9,842.0 4.05
Minor tributaries &
immediate drainage - 342.5 0.12
Totals 10,184.5 4.17
2. Outlets -
Republican River 10,204.6 2.02
Ungaged irrigation canal 0.0 1.40**
Total 10,204.6*** 3.42
C. Precipitation****:
1. Year of sampling: 47.6 centimeters.
2. Mean annual: 52.8 centimeters.
t Table of metric conversions—Appendix B.
tt Hartung, 1974; Adamovictr, 1975.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Estimated flow; Alridge, 1976.
*** Includes area of reservoir.
**** see Working Paper No. 175.
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4
III. LAKE WATER QUALITY SUMMARY
Swanson 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 two stations on the reservoir and from a number of depths at
each station (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 visit, a single 18.9-liter depth-integrated sam-
ple was composited for algal assays. Also each time, a depth-integra-
ted sample was collected from each of the stations for chlorophyll
a^ analysis. The maximum depths sampled were 10.7 meters at station
1 and 7.6 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 preserved properly and were not analyzed).
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PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNDCTVY (MCROMOI
PH (STAND UNITS)
TOT ALK (MG/L)
TOT P (MG/L)
ORTHO P
N02«N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UG/L)
SECCHI (METERS)
A. SUMMARY OF PHYSICAL AND
1ST SAMPLING ( 4/15/74)
2 SITES
CHEMICAL CHARACTERISTICS FOR StfANSON RESERVOIR
STORET CODE 3110
2ND SAMPLING ( 6/28/74)
2 SITES
3RD SAMPLING I 9/27/74)
2 SITES
RANGE
7.9 - 8.?
10.0 - 11.2
366. - 370.
8.4 - 8.4
185.
0.006
0.040
0.500
0.080
0.540
4.6
0.5
!*•».
~ 0.021
- 0.100
- 1.400
• 0.180
- 1.480
- 24.3
0.5
MEAN
8.1
10.4
368.
8.4
190.
0.011
0.076
0.786
0.861
14.4
0.5
MEDIAN RANGE MEAN MEDIAN
8.0 19.2 - 23.9 21.8 21.5
10.2 4.0 - 8.6 7.0 7.4
367. 570. - 623. 597. 592.
8.4 8.1 - 8.6 8.4 8.4
0.009
g.700 ••»••• .**•»•<•»*•••**•*«•••••
14.4 13.0 - 13.0 13.0 13.0
0.5 1.5 - 1.9 1.7 1.7
RANGE
15.5 - 16.8
7.0 - 8.6
307. - 469.
8.4 - 8.4
288.
0.016
0.0
0.500
0.050
0.520
13.1
0.4
- JCH.
- 2.200
" 0*110
- 2.230
- 18.7
0.4
MEAN
16.2
8.0
396.
8.4
0*814
IS. 9
0.4
MEDIAN
16.5
8.0
437.
8.4
294.
0.600
0.620
15.9
0.4
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
04/15/74
06/28/74
09/27/74
2. Chlorophyll a^ -
Sampling
Date
04/15/74
06/28/74
09/27/74
Dominant
Genera
1. Asterionella sp.
2. Cyclotella s>£.
3. Flagellates sp.
4. Glenodinium sp.
Total
1. Flagellates
2. Schroederia sp.
3. Cryptomonas sp.
4. Fragilaria sp.
5. Stephanodiscus sp.
Other genera
Total
1. Stephanodiscus sp.
2. Cryptomonas sp.
3. Oocystis sp.
4. Microcystis sp.
5. Closterium sp.
Other genera
Total
Station
Number
1
2
1
2
1
2
Algal Units
per ml
15,214
709
125
83
16,131
413
376
338
338
263
262
1,990
912
568
293
189
155
636
2,753
Chlorophyll a
(ug/D
4.6
24.3
13.0
13.0
13.1
18.7
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7
C. Limiting Nutrient Study:
Because of an 82% loss of total phosphorus in the sample
between the time of collection and the beginning of the assay,
the results of the algal assay are not considered representative
of conditions in the reservoir at the time the sample was taken.
The reservoir data indicate that nitrogen was limiting primary
productivity during the spring and fall sampling visits. The mean
inorganic nitrogen/orthophosphorus ratio was 13/1 in April and
3/1 in September, and nitrogen limitation would be expected.
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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
calculated using mean annual concentrations and mean annual flows.
Nutrient loads shown are those measured minus point-source loads,
if any. Nutrient loads for the Republican River outlet and Upper
Meeker Canal were calculated using the mean concentrations measured
at stations A-l and B-l and multiplying by the combined mean outflow.
Nutrient loads for unsampled "minor tributaries and immediate
drainage" ("ZZ" of U.S.G.S.) were estimated using the mean concentrations
in the Republican River at station A-2 and the mean ZZ flow.
The operators of the Benkelman and Stratton wastewater treatment
plants provided monthly effluent samples and corresponding flow data.
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A. Waste Sources:
1. Known municipal* -
Name
Benkelman
Stratton
Pop.
Served
1,349
481
Treatment
stab, pond
tr. filter
Mean Flow
(ms/d)
515.8
200.7
Receiving
Water
Republicai
Republicai
2. Known industrial - None
* Treatment plant questionnaires.
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10
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source vr total
a. Tributaries (non-point load) -
Republican River 15,105 86.3
b. Minor tributaries & immediate
drainage (non-point load) - 470 2.7
c. Known municipal STP's -
Benkelman . 730 4.2
Stratton 830 4.8
d. Septic tanks* - 10 <0.1
e. Known industrial - None
f. Direct precipitation** - 350 2.0
Total 17,495 100.0
2. Outputs -
Lake outlet - Republican River ,
Ungaged irri- *
gation canal
3. Net annual P accumulation - 11,565 kg.
* Estimate based on 20 shoreline dwellings and one campground; see Working
Paper No. 175.
** See Working Paper No. 175.
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11
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Republican River 242,700 87.8
b. Minor tributaries & immediate
drainage (non-point load) - 7,255 2.6
c. Known municipal STP's -
Benkelman 2,140 0.8
Stratton 2,400 0.9
d. Septic tanks* - 285 0.1
e. Known industrial - None
f. Direct precipitation** - 21,730 7.8
Total 276,510 100.0
2. Outputs -
Lake outlet - Republican River , , ~Q Qftc
Ungaged irri- } 138'805
gation canal
3. Net annual N accumulation - 137,705 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Republican River 2 25
* Estimate based on 20 shoreline dwellings and one campground; see Working
Paper No. 175.
** See Working Paper No. 175.
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12
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 0.87 0.57 13.7 6.8
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Swanson Reservoir:
"Dangerous" (eutrophic loading) 0.44
"Permissible" (oligotrophic loading) 0.22
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13
V. LITERATURE REVIEWED
Adamovich, Ted, 1975. Personal communication (reservoir mor-
phometry). NE Dept. of Env. Contr., Lincoln.
Alridge, Ray, 1976. Personal communication (evaporation loss and
irrigation withdrawal from Swanson Reservoir). Bureau of Recla-
mation, McCook.
Hartung, Ray, 1974. Personal communication (reservoir morphometry).
NE Dept. of Env. Contr., 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.
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VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
3101 BRANCHED OAK
3103 HARLAN COUNTY RESERVOIR
3103 HARRY 0. STRUNK (MED1CIN
3104 HUGH BUTLER (RED WILLOW)
3105 JOHNSON RESERVOIR
3106 LAKE MCCONAUGHY
3107 PA*NEE LAKE
3108 SHERMAN COUNTY RESERVOIR
3110 SWANSON RESERVOIR
MEDIAN
TOTAL P
0.04<»
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
0.5B5
0.175
0.090
0.090
500-
MEAN SEC
456.444
476.111
470.500
46b.d75
477.667
40V. 555
453.000
451.167
466. J33
MEAN
CHLORA
17.033
27.822
U.367
16.61?
26.133
8.644
15.367
6.717
14.450
15-
MIN DO
9.000
12.200
14.200
14.400
8.600
11.400
8.800
11.800
11.000
MEDIAN
DISS ORTnO P
0.013
0.061
0.009
0.014
O.OOsi
0.004
0.020
0.050
0.016
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PERCENT OF LAKES WITH HIGHER VALUES (NUMBER or LAKES *ITH HIGHEK VALUES)
LAKE
CODt LAKE NAME
3101 BRANCHED OAK
3103 HARLAN COUNTY RESERVOIH
3103 HARRY 0. STRUNK (MEOICIN
3104 HUGH BUTLER (RED WILLO*)
3105 JOHNSON RESERVOIR
3106 LAKt MCCONAUGHY
3107 PAWNEE LAKE
3108 SHERMAN COUNTY RESERVOIR
3110 SWANSON RESERVOIR
MEDUN
TOTAL P
86 (
0 (
50 (
63 (
13 I
100 <
75 (
3S (
25 (
7)
0)
4)
5)
1)
8)
6)
3)
?)
MEDIAN
INOKG
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 (
88 (
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)
MEUIAN
DISS OrfTrtO P
63 (
0 (
81 (
50 (
81 (
100 (
25 (
13 (
38 (
5)
0)
6)
4)
6)
8)
2)
1)
3)
1NOEX
NO
ti't
63
257
26o
245
4J8
363
362
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 <»1<»
3 3107 PAWNEE LAKE 363
<• 3108 SHERMAN COUNTY RESERVOIR 352
s 3110 SWANSON RESERVOIR 31^
6 310<» HUGH BUTLER
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
-4
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
LAKE CODE 3110
SWANSON RESERVOIR
TOTAL DRAINAGE AREA OF LAKE(SQ KH) 10204.6
SUB-DRAINAGE
TRIBUTARY AREA(SO KM)
3110A1
3110A2
3110ZZ
10204.6
9842.0
362.6
JAN
0.82
3.11
0.02
FEB
1.13
4.47
0.05
MAR
1.53
6.14
0.11
APR
2.55
5.44
0.03
TOTAL DRAINAGE AREA OF LAKE
SUM OF SUB-DRAINAGE AREAS
MAY
3.62
6.48
0.14
10204.6
10204.6
NORMALIZED FLOWS(CMS)
JUN JUL AUG
3.26
5.41
0.25
4.08
4.13
0.29
4.19
2.83
0.24
SEP
1.22
2.63
0.19
OCT
0.59
1.93
0.10
NOV
0.51
3.20
0.02
DEC
0.62
2.89
0.02
MEAN
2.02
4.05
0.12
SUMMARY
TOTAL FLOW IN
TOTAL FLO* OUT
50.13
24.13
NOTE *** TOTAL & ZZ OR. AREAS DIRECTLY CONTRIBUTING. 8620 SQ. MI. TOTAL AREA.
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR
MEAN FLOW DAY
3110A1
3110A2
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
5.15
0.43
0.06
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.05
3.79
0.0
0.0
0.30
2.41
1.86
2.92
3.40
4.36
4.64
3.54
14.33
2.43
24
7
5
16
7
5
9
23
12
4
7
24
7
5
16
7
5
9
22
12
4
7
FLOW DAY
8.41
0.51
0.10
0.03
0.03
0.03
0.03
0.03
0.03
0.03
0.04
0.0
0.0
0.0
2.80
1.70
2.32
3.11
4.25
4.45
2.58
8.86
FLOW DAY
FLOW
-------
LAKE CODE 3110
TRIBUTARY FLOW INFORMATION FOR NEBRASKA
SWANSON RESERVOIR
12/23/75
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY
3110ZZ
MONTH YEAR
8
9
10
11
12
1
2
3
4
5
6
7
74
74
74
74
74
75
75
75
75
75
75
75
MEAN FLOW DAY
0.25
0.11
0.07
0.07
0.08
0.07
0.07
0.07
0.07
0.07
0.38
0.16
24
7
5
16
7
5
9
22
12
4
7
FLOW DAY
0.24
0.10
0.08
0.07
0.07
0.08
0.07
0.05
0.07
0.05
0.08
FLOW OAY
FLOW
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APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 75/12/23
311001
40 10 16.0 101 03 57.0
SWANSON RESERVOIR
31087 NEBRASKA
11EPALCS
3
DATE
FROM
TO
74/04/15
74/06/28
74/09/27
TIME DEPTH
OF
DAY FEET
IS 40 0000
IS 40 0005
15 40 0015
15 40 0035
14 00 0000
14 00 0005
14 00 0016
14 00 0025
14 00 0035
10 15 0000
10 15 0005
10 15 0015
10 15 0022
00010
WATER
TEMP
CENT
8.0
8.0
8.0
7.9
23.7
22.0
21.2
20.7
19.2
16.5
16.8
16.6
16.6
00300
DO
MG/L
10.2
10.4
11.2
7.7
7.4
6.6
7.8
4.0,
8.2
8.0
8.6
7.0
00077
TRANSP
SECCHI
INCHES
18
75
17
00094
CNOUCTVY
FIELD
MICROMHO
369
367
366
367
623
601
589
589
570
469
323
437
469
00400
PH
SU
8.45
8.45
8.40
8.40
8.40
8.40
8.40
8.10
8.30
8.45
8.45
8.41
8.41
00410
T ALK
CAC03
MG/L
194
191
190
190
290
294
314
316
2111202
0040 FEET DEPTH
00610
NH3-N
TOTAL
MG/L
0.080
0.070
0.080
0.080
0.080
0.030
0.030
0.040
00625
TOT KJEL
N
MG/L
1.400
1.000
0.900
0.500
2.200
0.600
0.600
0.600
00630
N02&N03
N- TOTAL
MG/L
0.080
0.090
0.100
0.100
0.030
0.020K
O.OOOK
0.020K
00671
PHOS-DIS
ORTHO
MG/L P
0.021
0.013
0.011
0.009
0.049
0.019
0.017
0.018
DATE
FROM
TO
74/04/15
74/06/28
74/09/27
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
15
15
15
15
14
14
14
10
10
10
10
10
40
40
40
40
00
00
00
15
15
15
15
15
0000
0005
0015
0035
0000
0002
0016
0000
0003
0005
0015
0022
MG/L P
0
0
0
0
0
0
0
0
.065
.053
.052
.052
.089
.070
.072
.229
UG/L PERCENT
4.6
13.0
50.0
1.0
13.1
1.0
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 75/12/23
311002
40 09 35.0 101 07
SKANSON RESERVOIR
31087 NEBRASKA
16.0
11EPALES
DATE
FROM
TO
74/04/15
74/06/28
74/09/27
DATE
FROM
TO
74/04/15
74/06/28
74/09/27
TIME DEPTH
OF
DAY FEET
16 15 0000
16 15 0005
16 15 0015
14 30 0000
14 30 0005
14 30 0015
14 30 0025
10 45 0000
10 45 0005
10 45 0011
TIME DEPTH
OF
DAY FEET
16 15 0000
16 15 0005
16 15 0015
14 30 0000
14 30 0005
14 30 0006
10 45 0000
10 45 0002
10 45 0005
10 45 0011
00010
WATER
TEMP
CENT
8.2
8.2
8.1
23.9
22.9
21.5
21.0
15.5
15.5
15.5
00665
PHOS-TOT
MG/L P
0.056
0.053
0.053
0.079
0.077
0.076
00300
DO
MG/L
10.0
10.0
8.6
8.2
6.8
5.8
8.0
8.0
8.0
32217
CHLRPHYL
A
UG/L
24.3
13.0
18.7
00077
TRANSP
SECCHI
INCHES
18
60
14
00031
INCDT LT
REMNING
PERCENT
1.0
50.0
1.0
00094
CNDUCTVY
FIELD
MICROMHO
370
370
367
623
603
592
585
307
457
309
3
00400
PH
SU
8
8
8
8
8
8
8
8
8
8
.40
.40
.40
.60
.60
.30
.20
.41
.43
.45
00410
T ALK
CAC03
MG/L
189
188
185
288
324
288
2111202
0020
00610
NH3-N
TOTAL
MG/L
0.060
0.040
0.040
0.040
0.040
0.030
FEET DEPTH
00625 00630
TOT KJEL N02&N03
N N-TOTAL
MG/L MG/L
0.7*0 0.070
0.500 0.050
0.500 0.040
0.600 0.020
0.600 0.030
0.500 0.020
00671
PHOS-DIS
ORTHO
MG/L P
0.009
0.006
0.007
0.016
9.019
0.018
-------
APPENDIX E
TRIBUTARY and WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 76/01/27
3110A1
40 10 14.0 101 03 25.0
REPUBLICAN RIVER
31057 7.5 TRENTON
0/SWANSON RESERVOIR
BANK SAMP OFF RD .3 MI E OF TRENTON 0AM
11EPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
74/08/24
74/09/07
74/10/05
74/11/16
74/12/07
75/01/05
75/02/09
75/03/22
75/04/12
75/05/04
75/06/07
00630 00625
TIME DEPTH N026.N03 TOT KJEL
OF N-TOTAL N
DAY FEET
09
10
09
10
09
09
09
14
12
09
10
35
10
35
15
35
35
35
45
00
35
10
MG/L
0
0
0
0
0
0
0
0
0
0
0
.008
.410
.352
.464
.448
.600
.637
.556
.630
.580
.440
MG/L
0.
0.
0.
0.
1.
1.
0.
0.
1.
0.
1.
600
600
900
900
000
400
700
900
200
750
100
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL ORTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
010
050
025
050
024
024
016
025
110
025
050
MG/L
0.
0.
0.
P
015
015
005
0.005
0.
0.
0.
0.
0.
0.
0.
008
010
008
006
010
010
010
MG/L P
0.070
0.105
0.040
0.040
0.040
0.030
0.030
0.050
0.050
0.040
0.050
-------
STORE! RETRIEVAL DATE 76/01/27
3110A2
40 08 55.0 101 13 58.0
REPUBLICAN RIVER
31 7.5 STRATTON
T/SWANSON RESERVOIR
SEC RD BROG .5 MI S OF STRATTON
HEPALES 2111204
4 0000 FEET DEPTH
DATE
FROM
TO
74/11/16
74/12/07
75/01/05
75/02/09
75/03/P3
75/04/12
75/05/04
75/06/07
TIME DEPTH
OF
DAY FEET
14 45
14 40
14 45
14 55
10 15
12 30
14 40
14 40
00630
N02&N03
N-TOTAL
MG/L
0.768
0.890
0.990
1.245
0.436
0.575
0.125
0.260
00625
TOT KJEL
N
MG/L
0.700
0.600
1.300
0.900
0.850
1.500
0.600
3.600
00610
NH3-N
TOTAL
MG/L
0.025
0.100
0.048
0.032
0.024
0.020
0.015
0.050
00671
PHOS-DIS
ORTHO
MG/L P
0.020
0.035
0.045
0.048
0.031
0.040
0.015
0.085
00665
PHOS-TOT
MG/L P
0.070
0.060
0.060
0.070
0.110
0.150
0.050
0.420
-------
STORE! RETRIEVAL DATE 76/01/27
00630
DATE TIME DEPTH N02&N03
FROM OF N-TOTAL
TO DAY FEET MG/L
74/08/24 09 15
74/09/07 09 55
0.028
0.132
00625
TOT KJEL
N
MG/L
0.600
0.800
00610
NH3-N
TOTAL
MG/L
0.020
0.050
311081
40 09 05.0 101 02 27.0
UPPER MEEKER CANAL
31 7.5 TRENTON
0/SWANSON RESERVOIR
NE HWY 25 BRDG 3 MI SW OF TRENTON
11EPALES 2111204
4 0000 FEET DEPTH
00671 00665
PHOS-OIS PHOS-TOT
ORTHO
MG/L P MG/L P
0.017
0.020
0.055
0.120
-------
STORE! RETRIEVAL DATE 76/01/27
3110AA PD3110AA P001400
40 02 30.0 101 31 15.0
BENKELMAN
31057 7.5 BENKELMAN NE
T/SWANSON RESERVOIR
REPUBLICAN RIVER
11EPALES 2141204
4 0000 FEET DEPTH
DATE
FROM
TO
74/09/17
74/10/17
74/11/15
74/12/17
75/01/17
75/02/18
75/03/17
75/04/17
75/05/19
75/06/17
75/07/17
75/09/17
75/10/17
TIME DEPTH
OF
DAY
11
11
11
10
13
13
08
08
13
16
12
15
15
FEET
00
00
30
00
30
30
30
00
30
00
00
00
00
00630
N02&N03
N-TOTAL
MG/L
0.080
0.080
0.160
0.400
0.080
0.080
0.080
0.050
0.250
0.050
0.050
0.075
0.110
00625
TOT KJEL
N
MG/L
11.500
9.800
12.000
14.000
20.000
22.000
9.900
23.000
12.500
2.700
2.250
8.200
8.400
00610
NH3-N
TOTAL
MG/L
0.034
0.350
0.060
0.120
4.400
11.000
8.200
5.400
0.700
0.050K
0.025K
0.100
0.050
00671
PHOS-DIS
ORTHO
MG/L P
0.990
2.000
4.200
4.900
5.700
5.200
5.200
3.800
2.800
1.100
0.680
0*610
0.525
00665
PHOS-TOT
50051
FLOW
RATE
MG/L P
2.500
3.000
4.900
5.800
7.800
7.900
7.200
8.700
3.100
1.400
0.920
1.275
0.940
INST
0.
0.
0.
0.
0.
0.
0.
0.
MGD
250
150
150
100
100
120
110
120
50053
CONDUIT
FLOrf-MGD
MONTHLY
0.
0.
0.
0.
0.
250
150
100
120
100
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/01/27
3110A6 TF3110AB P000481
40 OB 45.0 101 14 00.0
STRATTON
31 7.5 STRATTON NE
T/SWANSON RESERVOIR
REPUBLICAN RIVER
11EPALES 2141204
4 0000 FEET DEPTH
DATE
FROM
TO
74/09/30
74/10/31
74/12/24
75/01/28
75/02/25
75/03/27
75/04/29
75/05/27
75/06/24
TIME DEPTH
OF
DAY FEET
10 30
17 00
10 00
14 30
13 15
15 00
11 30
11 00
13 00
00630
N02&N03
N-TOTAL
MG/L
6.600
9.300
7.680
8.200
0.080
4.900
7.900
4.700
3.670
00625
TOT KJEL
N
MG/L
30.000
18.000
26.000
29.000
30.000
24.000
31.000
35.000
18.000
00610
NH3-N
TOTAL
MG/L
10.000
2.600
8.400
7.900
0.170
4.900
1.450
11.500
0.370
00671
PHOS-DIS
ORTHO
MG/L P
7.000
6.200
6.300
7.100
1.280
8.200
5.900
5.400
3.800
00665
PHOS-TOT
MG/L P
14.000
ll.OOOL
7.900
9.100
14.000
8.500
17.300
7.100
12.500
50051
FLOW
RATE
INST MGD
0.078
0.085
0.040
0.058
0.035
0.050
0.040
0.033
0.030
50053
CONDUIT
FLOrf-MGD
MONTHLY
0.068
0.085
0.055
0.068
0.042
0.050
0.040
0.035
0.035
L ACTUAL VALUE is KNOWN TO
GREATER THAN VALUE GIVEN
------- |