U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
PRAIRIE R3SE LAKE
SHELBY COUNTY
IOWA
EPA REGION VII
WORKING PAPER No, 501
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
iVG.P.O. 699-440
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REPORT
ON
PRAIRIE ROSE LAKE
SHELBY COUNTY
IOWA
EPA REGION VII
WORKING PAPER No, 501
WITH THE COOPERATION OF THE
IOWA DEPARTMENT OF ENVIRONMENTAL QUALITY
AND THE
IOWA NATIONAL GUARD
AUGUST. 1976
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CONTENTS
Page
Foreword i i
List of Iowa Study Lakes 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
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11
FOREWORD
The National Eutrophication Survey was initiated in 1972 in
response to an Administration comitment 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 [ 3O3(e)], water
quality criteria/standards review [ 3O3(c)] , clean lakes [ 3l4(a,b)],
and water quality monitoring [ 5106 and §305(b) ] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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111
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 Iowa Department of Environ-
mental Quality for professional involvement, to the Iowa 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 Quality Division of the Department of
Environmental Quality 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 Joseph G. May, the Adjutant General of Iowa,
and Project Officer Colonel Cleadeth P. Woods, who directed the
volunteer efforts of the Iowa National Guardsmen, are also grate-
fully acknowledged for their assistance to the Survey.
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iv
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF IOWA
LAKE NAME COUNTY
Ahquabi Warren
Big Creek Reservoir Polk
Black Hawk Sac
Clear Cerro Gordo
Darling Washington
Lost Island Clay, Palo Alto
MacBride Johnson
Prairie Rose Shelby
Rathbun Reservoir Appanoose, Wayne
Red Rock Reservoir Marion
Rock Creek Jasper
Silver Worth
Spirit Dickinson
Viking Montgomery
West Okoboji Dickinson
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4138—
\ Iowa
Map Location
4136—
9508’
PRAIRIE ROSE LAKE
Scale
0 Tributary Sampling Site
X Lake Sampling Site
Km.
0 iMi.
95 12
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PRAIRIE ROSE LAKE
STORET NO. 1908
I. CONCLUSIONS
A. Trophic Condition:
Survey data indicate that Prairie Rose Lake is eutrophic.
It ranked fifth in overall trophic quality when the 15 Iowa
lakes and reservoirs sampled in 1974 were compared using a com-
bination of six parameters*. Three of the water bodies had less
median total phosphorus, four had less and two had the same median
dissolved orthophosphorus, six had less median inorganic nitrogen,
eight had less mean chlorophyll a, and six had greater mean Secchi
disc transparency.
Survey limnologists noted that the water was very muddy
near sampling station 1 in July. They observed an algal bloom
throughout the lake and macrophytes and an algal mat at the east
end of the lake in September.
B. Rate-Limiting Nutrient:
Due to significant nutrient changes in the samples, the algal
assay results are not representative of conditions in the lake
at the times the samples were taken (04/17/74 and 09/25/74).
The lake data indicate phosphorus limitation at sampling
station 1 and 2 in April and at station 2 in September. Station
1 was nitrogen limited in September.
* See Appendix A.
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2
C. Nutrient Controllability:
1. Point sources-—No point sources of nutrients are known
to impact Prairie Rose Lake. Although the lake is surrounded
by Prairie Rose State Park, virtually all of the park sewage
is transported out of the drainage basin for treatment and
disposal*.
During the sampling year, the lake received a total phos-
phorus loading of 0.72 g/m 2 /year, or more than twice that pro-
posed by Vollenweider (Vollenweider and Dillon, 1974) as a
eutrophic loading (see page 11). Unless the non-point phosphorus
load can be reduced, Prairie Rose Lake can be expected to exhibit
progressive symptoms of eutrophication.
2. Non-point sources--All of the phosphorus entering the
reservoir during the sampling year apparently came from non-
point sources, of which the principal cultural one was agri-
culture. The one tributary sampled (B-i) contributed about 28%
of the total phosphorus load. Minor tributaries and irrmiediate
drainage were estimated to have provided about 69% of the total
phosphorus load.
A study of land-use practices in the drainage is needed to
determine whether any significant reduction of non-point phos-
phorus inputs can be accomplished.
* Hemminger, 1976.
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3
II. •LAKE AND DRAINAGE BASIN CHARACTERISTICSt
A. Lake Morphometrytt:
1. Surface area: 0.88 kilometers 2 .
2. Mean depth: 3.3 meters.
3. Maximum depth: 8.1 meters.
4. Volume: 2.904 x 106 m 3 .
5. Mean hydraulic retention time: 1.2 years.
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Drainage Mean flow
Name area (km 2 )* ( m 3 /sec)*
Unnamed Stream B-l 5.7 0.02
Minor tributaries &
imediate drainage - 13.8 0.06
Totals 19.5 0.08
2. Outlet -
Unnamed Stream A-i 20.4** 0.08
C. Precipitatiorl***:
1. Year of sampling: 82.3 centimeters.
2. Mean annual: 71.3 centimeters.
1- Table of metric conversions--Appendix B.
ft Harrison, 1975.
* For limits of accuracy, see Working Paper No. 175, “...Survey Methods,
1973—1976”.
** Includes area of lake.
*** See Working Paper No. 175.
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4
III. LAKE WATER QUALITY SUMMARY
Prairie Rose Lake 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 lake (see map, page
v). During each visit, a single depth-integrated (4.6 m or near bot-
tom to surface) sample was composited from the stations for phytoplankton
identification and enumeration; and during the first and last 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 7.3 meters at station 1 and 2.4 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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A. SUMMARY OF PHYSICAL. AND
CHEMICAL
STORET
CMARACTERISTICS FOR PRAIRIE
CODE 1908
ROSE LAKE
1ST SAMPLING ( 4/17/74)
2ND SAMPLING ( 7/ 2/74)
3RD SAMPLING (
9/25/74)
2 SITES
2 SITES
2 SITES
PARAMETER
RANGE MEAN MEDIAN
MANGE MEAN MEDIAN
RANGE MEAN
MEDIAN
TEMP (C)
9.7
— 11.0 10.3 9.9
23.3
— 24.3 23.8 23.6
1.7
— 16.2 16.0
16.0
DISS OXY (MG/L)
10.0
— 11.2 10.4 10.0
6.4
— 7.6 6.9 6.8
7.0
— 8.0 7.4
7.4
CNDCTVY (MCROMO)
284.
— 294. 288. 285.
392.
— 397. 395. 394.
283.
— 287. 285.
285.
PH (STAND UNITS)
*****G
***** *******Ø*O *O*O*
8.2
— 8.4 8.3 8.2
7.8
— 7.9 7.9
7.8
TOT ALK (MG/L)
185.
— 187. 186. 186.
*****O
._* ******4***G* *******
164.
— 166. 165.
164.
TOT P (MG/U
0.03b
— 0.056 0.043 0.042
******
******Q*9**G** Q Q**O*
0.035
— 0.152 0.077
0.070
ORIHO P (MG/L)
0.007
0.017 0.009 0.007
***4D*
0.009
— 0.015 0.011
0.011
N02.N03 IMG/L)
0.750
— 0.800 0.770 0.760
*****
GD*O*****•*****O***Q*
0.090
— 0.160 0.103
0.090
AMMONIA (MG/L)
0.050
— 0.070 0.058 0.060
O*****
0.040
— 0.070 0.054
0.060
KJEL N (MG/L)
0.600
— 0.800 0.650 0.600
ooo’
0.700
— 1.100 0.857
0.800
INORG N (MG/L)
0.810
— 0.860 0.828 0.815
0.140
— 0.210 0.157
0.150
TOTAL N (MG/U
1.350
— 1.590 1.420 1.360
•*****
0.800
— 1.260 0.960
0.900
CHLRPYL A (UG/L)
13.3
— 14.2 13.7 13.7
21.4
— 28.7 25.0 25.0
13.1
— 13.4 13.2
13.2
SECCHI (METERS)
1.0
— 1.2 1.1 1.1
0.8
— 1.0 0.9 0.9
0.7
— 0.8 0.8
0.8
(7 ,
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6
B. Biological characteristics:
1. Phytoplankton -
Sampling Dominant Algal Units
Date Genera per ml
04/17/74 1. Asterionella . 7,006
2. Centric diatoms 2,158
3. Flagellates 1,487
4. Dinobryon p.. 835
5. Ankistrodesmus 435
Other genera 1,365
Total 13,286
07/02/74 1. Melosira p. 522
2. Anabaena 494
3. Aphanizomenon 385
4. Fragilaria p. 275
5. Cryptomonas p. 2O
Other genera 521
Total 2,417
09/25/74 1. Cryptomonas p. 766
2. Closteriopsis . p... 681
3. Fragilaria p. 383
4. Oscillatoria . p_. 255
5. Stephanodiscus p. 85
Other genera 42
Total 2,212
2. Chlorophyll a -
Sampling Station Chlorophyll a
Date Number ( ig/1 )
04/17/74 1 14.2
2 13.3
07/02/74 1 21 .4
2 28.7
09/25/74 1 13.4
2 13.1
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7
C. Limiting Nutrient Study:
Significant changes in nutrient levels occurred in the
assay samples prior to the beginning of the assays, and the
results are not indicative of conditions in the lake at the
times the samples were taken (04/17/74 and 09/25/74).
The lake data indicate phosphorus limitation at sampling
stations 1 and 2 in April and at station 2 in September (the
mean inorganic nitrogen/orthophosphorus ratios were 116/1,
61/1, and 16/1, respectively); however, nitrogen limitation
is indicated at station 1 in September (the mean N/P ratio
was 12/1).
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8
IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the Iowa National
Guard collected monthly near-surface grab samples from each of the
tributary sites indicated on the map (page v), except for the high
runoff months of April, May and June, when two samples were collected.
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 unormalizedu or average year were provided by
the Iowa 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 loads for unsampled
“minor tributaries and immediate drainage” (“ZZ” of U.S.G.S.) were
estimated using the nutrient loads at station B-i, in kg/km 2 /year,
and multiplying by the ZZ area in km 2 .
No known point sources impacted Prairie Rose Lake 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 -
kgP/ %of
Source yr total
a. Tributaries (non-point load) -
Unnamed Stream B-i 180 28.3
b. Minor tributaries & immediate
drainage (non-point load) - 440 69.3
c. Known municipal SIP’s - None
d. Septic tanks - None
e. Known industrial - None - -
f. Direct precipitation* - 15 2.4
Total 635 100.0
2. Outputs -
Lake outlet - Unnamed Stream A-i 170
3. Net annual P accumulation - 465 kg.
* See Working Paper No. 175.
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10
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs —
kgN/ %of
Source yr total
a. Tributaries (non-point load) -
Unnamed Stream B-i 3,840 27.3
b. Minor tributaries & ininediate
drainage (non-point load) - 9,300 66.0
c. Known municipal SIP’s — None
d. Septic tanks - None
e. Known industrial - None - -
f. Direct precipitation* - 950 6.7
Total 14,090 100.0
2. Outputs -
Lake outlet - Unnamed Stream A-i 4,705
3. Net annual N accumulation - 9,385 kg.
0. Mean Annual Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km 2 /yr kg N/km 2 /yr
Unnamed Stream B-i 32 674
* See Working Paper No. 175.
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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’ 1 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/m 2 /yr 0.72 0.53 16.0 10.7
Vollenweider phosphorus loadings
(g/m 2 /yr) based on mean depth and mean
hydraulic retention time of Prairie Rose Lake:
“Dangerous” (eutrophic loading) 0.34
“Permissible” (oligotrophic loading) 0.17
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12
V.. LITERATURE REVIEWED
Harrison, Harry M., 1975. Personal comunication (lake morphometry).
IA Cons. Corn., Des Moines.
Hemininger, Duane (Park Attendant), 1976. Personal comunication
(Prairie Rose State Park sewage disposal system). Prairie Rose
State Park, Harlan.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of
the phosphorus loading concept to eutrophication research.
Nati. Res. Council of Canada Pubi. No. 13690, Canada Centre
for Inland Waters, Burlington, Ontario.
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VI. APPENDICES
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE uSED IN RANKiNGS
LAKE JEOIAN MEDIAN 500- MEAN 15- MEDIAN
CODE LAKE NAME TOTAL - INORG N MEAN 5EC Ci1LO ’ A MIN DO DISS OMTi-IO P
1901 LAKE AC0UAt I 0.06? 0.335 46Y.333 8.600 8.200 0.009
1902 BIG CREEK RESERVOIR 0.046 6.465 438.500 16.867 14.800 0.011
1903 BLACK HAWK LAKE 0.185 0.130 488.167 49.740 15.000 0.020
1904 CLEAR LAKE 0.059 0.070 465.125 17.400 8.600 0.010
1905 LAKE DARLING 0.077 1.475 482.500 13.817 9.200 0.012
1906 LOST ISLAND LAKE 0.146 0.065 421.161 36.100 8.400 0.021
1907 LAKE MACBRIDE 0.061 2.035 458.44’. 17.067 15.000 0.010
1908 PRAIRIE ROSE LAKE 0.056 0.210 463.667 17.350 8.600 0.010
1909 RATHBUN RESERVOIR 0.071 1.170 475.889 12.039 14.000 0.008
1910 RED ROCK LAKE 0.180 1.880 473.400 14.730 14.000 0.104
1911 ROCK CREEK LAKE 0.065 1.400 480.500 18.361 8.400 0.007
1912 SILVER LAKE 0.193 0.565 482.667 95.300 10.000 0,034
1913 SPIRIT LAKE 0.041 0.090 422.667 12.622 9.000 0.007
1914 VIKING LAKE 0.075 0.130 459.000 26.033 14.200 0.0 11
1915 WEST LAKE OKOBOJI 0.046 0.060 380.444 7.722 15.000 0.011
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PERCENT OF LAKES WITH HiGHER VALUFS (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE MEDIAN MEDIAN 500— MEAN 15— MEDIAN INDEX
CODE LAKE NAME TOTAL P INO’ G N MEAN SEC CILORA NIN DO DISs t.)RTHO P NU
1901 LAKE AC UA8I 57 C 8) 50 C 7) 43 4 6) 93 ( 13) 100 4 14) 79 ( 11) 422
1902 BIG CREEK RESERVOIR 9 C 12) 0 4 0) 79 4 11) 57 4 8) 21 4 3) 50 ( 7 296
1903 8LACK HAWK LAKE 7 ( 1) 68 9) 0 ( 0) 7 4 1) 1 4 0) 21 4 3) 110
1904 CLEAR LAKE 71 C 10) 86 4 12) SO 4 7) 36 ( 5) 75 4 10) 64 4 8) 382
1905 LAKE OARLING 4) 21 ( 3) 14 C 2) 71 C 10) 57 C 8) 43 ( 6) 235
1906 LOST ISLAND LAKE 21 4 3 93 ( 13) 93 ( 13) 1’. 4 2) 89 4 12) 14 ( 2) 32 ’
1907 LAKE MACBRIDE ‘. ( 9) 7 4 1) 71 4 10) 50 C 7) 7 ( 0) 64 ( 8) 263
1908 PRAIRIE ROSE LAKE 79 C 11) 57 ( 8) 57 4 8) 43 C 6) 75 C 10) 64 4 8) 375
1909 RATHF3UN RESERVOIR 43 ( 6) 36 C 5) 29 4 4) 86 4 12) 39 4 5) 86 C 12) 319
1910 RED ROCK LAKE 14 C 2) 14 4 2) 36 C 5) 6’. C 9) 39 C 5) 0 ( 0) 167
1911 ROCK CREEK LAKE 50 ( 7) 29 C 4) 21 C 3) 29 C 4) 89 C 12) 96 ( 13) 31’.
1912 SILVER LAKE 0 4 0) 43 C 6) 7 ( 1) 0 C 0) 50 ( 7) 7 ( 1) 107
1913 SPIRIT LAKE 100 C 14) 19 ( 11) 86 C 12) 79 ( 11) 64 4 9) 96 C 13) 504
19)’. ViKING LAKE 36 ( 5) 68 ( 9) 64 C 9) 21 ( 3) 29 1 4) 32 4 4) 250
1915 WEST LAKE 0K0 1 30J1
89 C 12) 100 C 14) 100 C 14) 100 ( 14)
7 C 0) 32 ( 4) 428
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LAKES RANKEO BY INDEX NOS.
RANK LAKE CODE LAKE NAME INOEX NO
1 1913 SPIRIT LAKE 504
2 1915 WEST LAKE OKO8OJI 428
3 1901 LAKE ACQUABI 422
4 1904 CLEAR LAKE 382
5 1908 PRAIRII ROSE LAKE 375
6 1906 LOST ISLAND LAKE 32’.
7 1909 RATH8UN RESERVOIR 319
8 1911 ROCK CREEK LAKE 314
9 1902 BIG CREEK RESERVOIR 296
10 1907 LAKE MACBRIDE 263
11 1914 VIKING LAKE 250
12 1905 LAKE DARLING 235
13 1910 RED ROCK LAKE 167
14 1903 BLACK HAWK LAKE 110
15 1912 SILVER LAKE 107
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APPENDIX B
CONVERSION FACTORS
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CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 = feet
Cubic meters x 8.107 x 1O 4 = 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 = lbs/square mile
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APPENDIX C
TRIBUTARY FLOW DATA
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TRIBUTARY FLOW INFORMATION FOR IOWA 12 123/75
LAKE CODE 1908 PRAIRIE ROSE
TOTAL DRAINAGE AREA OF LAKE(SO KM) 20.4
SUB—DRAINAGE NOi MAL1ZED FLOWS (CMSI
TRIBUTARY AREA(S0 KH) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MEAN
190841 20.4 0.02 0.07 0.15 0.09 0.10 0.19 0.10 0.08 0.05 0.04 0.03 0.02 0.08
1908B1 5.7 0.01 0.02 0.04 0.02 0.03 0.05 0.03 0.02 0.01 0.01 0.01 0.01 0.02
1908ZZ 14.7 0.02 0.05 0.11 0.06 0.01 0.13 0.07 0.06 0.04 0.03 0.02 0.02 0.06
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 20.4 TOTAL FLOW IN 0.94
SUM OF SUB—DRAINAGE AREAS 20.4 TOTAL FLOW OUT 0.94
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY FLOW DAY FLOW DAY FLOW
19 08A1 8 74 0.02 17 0.03
9 74 0.01 5 0.01
10 74 0.01 4 0.01
11 74 0.01 1 0.01
12 74 0.01 8 0.01
1 75 0.01 4 0.01
2 75 0.01 22 0.01
3 75 0.14 1 0.03
4 75 0.24 4 0.14 Ii 0.18
5 75 0.14 2 0.22 17 0.10
6 75 0.16 9 0.09 24 0.09
7 75 0.06 ii 0.07
1908bI 8 74 0.01 17 0,01
9 74 0.00 5 0.00
10 74 0.00 4 0.00
I l 7’. 0.00 1 0.00
12 74 0.00 8 0.00
1 75 0.00 4 0.00
2 75 0.00 22 0.00
3 75 0.04 1 0.01
4 15 0.07 4 0.04 11 0.05
5 75 0.04 2 0.06 17 0.03
6 75 0.05 9 0.03 24 0.09
7 75 0.02 11 0.02
1908 1Z 8 74 0.01
9 74 0.01
10 74 0.01
11 74 0.01
12 74 0.01
I 75 0.01
2 75 0.01
3 75 0.10
4 7S 0.17
5 75 0.10
6 75 0.12
7 75 0.05
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APPENDIX D
PHYSICAL and CHEMICAL DATA
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STORET RETRIEVAL DATE 75/12/23
00665 32217
PHOS—TOT CHLRPHYL
A
MG/I P UG/L
00031
INCDT LI
REPINING
PERCENT
190801
41 36 00.0 095 02 00.0
PRAIRIE ROSE LAKE
19165 IOWA
8 • 20
8.20
8 • 20
8,20
7.83
7.83
7 • 85
7 • 85
14/04/17 15 20 0000
15 20 0005
15 20 0015
15 20 0024
74/07/02 12 15 0000
74/09/25 10 10 0000
10 10 0005
10 10 0006
10 10 0015
10 10 0024
0.045 14.2
0.039
0.037
0,036
21.4
13.4
I IEPALES
2111202
4
0028
FEET DEPTH
DATE
TIME DEPTH
FROM
OF
TO
DAY FEET
74/04/17
15 20 0000
15 20 0005
15 20 0015
15 20 0024
74/07/02
12 15 0000
12 15 0005
12 15 0010
12 15 0015
74/09/25
10 10 0000
10 10 0005
10 10 0015
10 10 0024
DATE
TINE DEPTH
FROM
OF
TO
DAY FEET
00010
00300
00077
00094
00400
00410
00610
00625
00630
00671
WATER
DO
TRANSP
CNDUCTVY
PH
T ALK
NH3—N
TOT KJEL
N02&N03
PHOS-DIS
TEMP
SECCHI
FIELD
CACO3
TOTAL
N
N—TOTAL
ORTHO
CENT
MG/L
INCHES
MICRONHO
SU
MG/L
MG/I
MG/L
MG/L
MG/L P
9.9
48
285
187
0.060
0.600
0.750
0.007
9.9
10.0
285
185
0.060
0.600
0.760
0.008
9.8
10.0
284
185
0.050
0.600
0.760
0.007
9.7
10.0
285
186
0.050
0.600
0.760
0.007
23.6
6.4
40
397
23.6
6.8
392
23.4
6.6
394
23.3
6.4
397
16.2
7.6
29
285
165
0.060
0.900
0.090
0.012
16.2
7.0
285
164
0.060
0.800
0.090
0.012
16.2
7.4
285
164
0.060
0.800
0.090
0.010
16.0
7.4
285
164
0.070
0.900
0.090
0.015
0.068
0.069
1.0
0.07 1
0.152
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STORET’ RETRIEVAL DATE 75/12/23
190802
41 36 00.0 095 02 00.0
PRAIRIE ROSE LAKE
19165 IOWA
1 IEPALES 2111202
4 0012 FEET OEPTII
00010 00300 00077 00094 00400 00410 00610 00625 00630 00671
DATE TIME DEPTH WATER DO TRANSP CNDUCTVY PH 1 ALK NH3—N TOT KJEL N02&N03 PHOS—DIS
FROM OF TEMP SECCHI FIELD CACO3 TOTAL N N—TOTAL ORTHO
TO DAY FEET CENT MG/I INCHES MICROMMO SU NG/L MG/I MG/I MG/L MG/L P
74/04/17 15 50 0000 11.0 40 293 186 0.060 0.700 0.800 0.010
15 50 0002 11.0 11.0 293
15 50 0008 11.0 11.2 294 185 0.070 0.800 0.790 0.017
74/07/02 12 40 0000 24.3 7.6 30 395 8.30
12 40 0004 24.3 7.6 394 8.30
12 40 0007 24.3 7.2 394 8.40
74/09/25 09 45 0000 15.9 8.0 31 283 7.89 164 0.050 1.100 0.160 0.009
09 45 0005 15.7 7.2 287 7.85 166 0.040 0.700 0.100 0.010
09 45 0008 15.7 7.4 283 7.87 165 0.040 0.800 0.100 0.011
00665 32217 00031
DATE TIME DEPTH PHOS—TOT CIILRPHYL INCOT LT
FROM OF A REMNING
TO DAY FEET MG/L P UG/L PERCENT
74/04/17 15 50 0000 0.046 13.3
15 50 0008 0.056
74/07/02 12 40 0000 28.7
74/09/25 09 45 0000 0.077 13.1
09 45 0005 0.035 1.0
09 45 0008 0.070
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APPENDIX E
TRIBUTARY DATA
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STORET RETRIEVAL DATE 7b/01/27
1908A1
41 36 00.0 095 13 00.0
UNNAHEU STREAM
19 SHELBY CO HWY HP
0/PRAIRIE ROSE RESERVOIR
BROG W EDGE OF PRAIRIE ROSE STATE PARK
1 IEPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 TOT KJEL NH3—N PHOS—DIS PHOS—TOT
FROM OF N—TOTAL N TOTAL ORTHO
TO DAY FEET MG/I MG/L MG/L MG/L P MG/L P
74/08/17 15 05 0,176 1.400 0.145 0.020 0,135
74/09/OS 08 00 0.480 1.300 0.095 0.025 0.080
74/10/04 07 45 0.840 1.000 0.135 0.020 0.140
74/11/01 13 50 0.048 0.800 0.110 0.020 0.050
74/12/08 13 20 0.22’. 0.700 0.070 0.010 0.020
75/01/04 17 20 0.144 0.900 0.056 0.013 0.020
75/02/22 16 45 0.195 0.800 0.072 0.016 0.040
75/03/01 16 30 0.185 0.750 0.045 0.010 0.030
75/04/04 18 30 0.810 1.650 0.250 0.010 0.060
75/04/11 17 45 0.980 1.150 0.240 0.010 0.070
75/05/05 18 30 0.065 1.050 0.025 0.015 0.070
75/05/17 19 08 0.870 0.900 0.030 0.030 0.090
75/06/09 16 37 0.320 0.750 0.075 0.020 0.090
75/06/24 17 45 0.155 3.000 0.040 0.030
75/07/11 16 30 0.220 1.200 0.052 0.025 0.134
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STORET RETRIEVAL DATE 76/01/27
190881
41 37 00.0 095 11 00.0
UNNAMED STREAM
19 SHELBY CO HWY HP
1/PRAIRIE ROSE LAKE
2NORY RD BROG 4.2 MI SW OF JACKSONVILLE
1)EPALES 2111204
4 0000 FEET DEPTH
00630 00625 00610 00671 00665
DATE TIME DEPTH N02&N03 TOT KJEL NH3—N PHOS—DIS P 1105—TOT
FROM OF N-TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/L P MG/L i
74/08/17 14 40 4.100 1.800 1.000
74/09/05 07 45 2.400 0.700 0.075 0.080 0.220
74/10/04 09 20 2.160 0.500 0.075 0.060 0.130
74/11/01 14 00 2.240 0.800 0.360 0.110 0.200
75/04/04 18 20 6.000 7.100 1.400 0.270 1.550
75/04/11 17 50 6.400 1.150 0.095 0.055 0.150
75/05/05 18 40 0.120 1.050 0.015 0.035 0.200
75/05/17 19 05 0.560 0.550 0.145 0.075 0.130
75/06/09 16 55 5.400 0.800 0.090 0.065 0.190
75/06/24 18 00 2.700 0.410 0.155
75/07/11 17 00 6.300 0.500 0.045 0.060 0.110
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