U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
MAGIC RESERVOIR
CAPIAS AND ELAINE COIMTIES
IDAHO
EPA REGION X
WORKING PAPER No, 782
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
MAGIC RESERVOIR
CAMAS AND ELAINE COUNTIES
IDAHO
EPA REGION X
WORKING PAPER No, 782
WITH THE COOPERATION OF THE
IDAHO DEPARTMENT OF HEALTH AND WELFARE
AND THE
IDAHO NATIONAL GUARD
JULY, 1977
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REPORT ON MAGIC RESERVOIR
CAMAS AND BLAINE COUNTIES, IDAHO
EPA REGION X
by
National Eutrophication Survey
Water and Land Quality Branch
Monitoring Operations Division
Environmental Monitoring & Support Laboratory
Las Vegas, Nevada
and
Special Studies Branch
Corvallis Environmental Research Laboratory
Corvallis, Oregon
Working Paper No. 782
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
July 1977
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CONTENTS
Page
foreword i i
List of Idaho Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 5
III. Lake Water Quality Summary 7
IV. Nutrient Loadings 13
V. Literature Reviewed 20
VI. Appendices 21
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ii
FOREWORD
The National EutropMcatlon Survey was Initiated 1n 1972 1n
response to an Administration commitment to Investigate the nation-
wide threat of accelerated eutrophlcation to freshwater lakes and
reservoirs.
OBJECTIVES
The Survey was designed to develop, in conjunction with state
environmental agencies, information on nutrient sources, concen-
trations, 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 nonpolnt source pollution abatement 1n lake water-
sheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophlcation 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 eutrophlcation control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and
watershed 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
L§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.
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m
Beyond the single lake analysis, broader based correlations
between nutrient concentrations (and loading) and trophic condition
are being made to advance the rationale and data base for refine-
ment 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 forivjlation of
planning guidelines and policies by the U.S. Environmental Protection
Agency and to augment plans implementation by the states.
ACKNOWLEDGMENTS
The staff of the National Eutrophication Survey (Office of
Research and Development, U.S. Environmental Protection Agency)
expresses sincere appreciation to the Idaho Department of Health
and Welfare for professional involvement, to the Idaho National
Guard for conducting the tributary sampling phase of the Survey,
and to those Idaho wastewater treatment plant operators who pro-
vided effluent samples and flow data.
The staff of the State of Idaho Department of Health and
Welfare, Division of Environment, provided invaluable lake docu-
mentation and counsel during the Survey, reviewed the preliminary
reports and provided critiques most useful in the preparation of
this Working Paper Series.
Major General James S. Brooks, Adjutant General of Idaho, and
Project Officer Major Vestal L. Baker, who directed the.volunteer
efforts of the Idaho National Guardsmen, are also gratefully
acknowledged for their assistance to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF IDAHO
LAKE NAME
American Falls Reservoir
Cascade Reservoir
Coeur d'Alene Lake
Dworshak Reservoir
Mauser Lake
Hayden Lake
Island Park Reservoir
Lake Lowell (Deer Flat Reservoir)
Magic Reservoir
Palisades Reservoir
Payette Lake
Lower Twin Lake
Upper Twin Lake
COUNTY
Bannock, Bingham, Power
Valley
Benewah, Kootenai
Clearwater
Kootenai
Kootenai
Fremont
Canyon
Blaine, Camas
Bonneville (Lincoln in WY)
Valley
Kootenai
Kootenai
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Sew.ui'' Treatment Facility
Oj) IrilxiUry Sampling Site
X I -iko 'Mimpl ing Si tc
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REPORT ON MAGIC RESERVOIR, IDAHO
STORE! NO. 1609
I. CONCLUSIONS
A. Trophic Condition:*
Survey data indicate that Magic Reservoir is eutrophic,
i.e., nutrient rich and highly productive. Whether such
nutrient enrichment is to be considered beneficial or dele-
terious is determined by its actual or potential impact
upon designated beneficial water uses of each lake.
Chlorophyll a_ values in the lake ranged from 1.3 yg/1
in May to 27.3 yg/1 in September with a mean of 7.3 yg/1.
Potentials for primary production as measured by algal assay
control yields were high. Lake water transparency was gen-
erally good in the summer and fall, but low during spring
sampling. Of the 15 Idaho lakes sampled in 1975, only 2 had
higher median total phosphorus (0.062 mg/1), none had higher
median inorganic nitrogen (0.130 mg/1), and 1 had higher
median orthophosphorus (0.020 mg/1) levels than Magic Reser-
voir.
Survey limnologists did not report any problem algal
blooms or macrophytes during their visits to the lake. How-
ever, other studies (C. Falter, 1973) have reported bloom
*See Appendix E.
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conditions in midsummer of several dominant species in the lake,
and recommended restriction of nutrient supplies, particularly
nitrates, to curtail future summer algal growths.
B. Rate-Limiting Nutrient:
The algal assay results indicate that Magic Reservoir was
limited by available phosphorus during spring sampling (05/15/75)
and by available nitrogen during the fall (09/17/75). The
reservoir data suggest nitrogen limitation at all three sampling
times.
C. Nutrient Controllability:
1. Point sources -
During the sampling year, the listed point sources were
calculated to contribute 21.5% of the total phosphorus load
to Magic Reservoir. The wastewater treatment plant at
Ketchum contributed 15.2%, and two other facilities at Hailey
and Mountain Meadows Mobile Home Park contributed 5.1% and
1.2%, respectively. However, actual annual contributions to
Magic Reservoir from these plants are somewhat less than the
calculated values as during May to October much of the Big
Wood River is diverted for irrigation at Bellevue. Further
investigation is needed to determine what percent of the
loadings from the municipal plants discharging to Big Wood
River actually reach Magic Reservoir.
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2
The present phosphorus loading of 2.58 g P/m /yr is twice
that proposed by Vollenweider (1975) as a "eutrophic" loading.
The loading data suggest that 90% reduction of contributions from
the known point sources would still leave high nutrient inputs,
and further reduction in nutrient contributions, including non-
point, would probably be necessary to effect lake water quality
improvement. Examination of land use practices and identification
of additional point sources may provide answers to further nutrient
reductions.
2. Nonpoint sources -
Nonpoint sources, including precipitation, contributed 78.5%
of the total phosphorus input during the sampling year. The Big
Wood River contributed 22.8%, Camas Creek contributed 45.0% and
the ungaged minor tributaries and immediate drainage contributed
an estimated 4.8%.
The nutrient export rates of Poison Creek were substantially
greater during the sampling year than the other gaged tributaries
to Magic Reservoir (Section IV-D). These inflated rates may be
due to unidentified point sources rather than to nonpoint source
inputs, but more extensive sampling would have to be done to
determine the location and significance of these possible sources.
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II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized below.
Lake morphometry data were provided by Martin and Hansen (1966)
and U.S. Geological Survey (USGS) Water Quality Records (1972).
Tributary flow data were provided by the Idaho District Office
of the USGS. Outlet drainage area includes the lake surface area.
Mean hydraulic retention time was obtained by dividing the lake
volume by mean flow of the outlet. Precipitation values are es-
timated by methods as outlined in National Eutrophication Survey
(NES) Working Paper No. 175. A table of metric/English conver-
sions is included as Appendix A.
A. Lake Morphometry:
1. Surface area: 15.80
2. Mean depth: 15.0 meters.
3. Maximum depth: ?
4. Volume: 236.213 x 106 m3.
5. Mean hydraulic retention time: 175 days.
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Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries -
Drainage Mean flow
Name area(km?) (m3/sec)
A-2 Big Wood River 2,147.1 9.29
C-l Camas Creek 1,678.3 5.29
D-l Poison Creek 18.7 0.04
E-l Rock Creek 105.7 0.32
Minor tributaries and
immediate drainage - 178.4 0.48
Totals 4,128.2 15.42
2. Outlet - A-l Big Wood River 4,144.0 15.66
Precipitation:
1. Year of sampling: 30.2 cm.
2. Mean annual: 24.1 cm.
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III. LAKE WATER QUALITY SUMMARY
Magic Reservoir was sampled three times during the open-
water season of 1975 by means of a pontoon-equipped Huey heli-
copter. Each time, samples for physical and chemical parameters
were collected from three stations on the lake and from a number
of depths at each station (see map, page v). During each visit,
depth-integrated samples were collected from each station for
chlorophyll ^analysis and phytoplankton identification and enu-
meration. During the first and last visits, 18.9-liter depth-
integrated samples were composited for algal assays. Maximum
depths sampled were 33.5 meters at Station 01, 27.4 meters at
Station 02, and 15.2 meters at Station 03. For a more detailed
explanation of NES methods, see NES Working Paper No. 175.
The results obtained are presented in full in Appendix C
and are summarized in III-A for waters at the surface and at the
maximum depth for each site. Results of the phytoplankton counts
and chlorophyll a_ determinations are included in III-B. Results
of the limiting nutrient study are presented in III-C.
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MAGIC RESERVOIR
STOPET CODE 1*09
PHYSICAL AND CHEMICAL CHARACTERISTICS
(
(
f
(
(
PARAMETER
TEMPERATURE (OEG
0.-1.5 M DEPTH
MAX. DEPTH**
DISSOLVED OXYGEN
0.-1.5 M DEPTH
MAX DEPTH**
( 5/15/75
S««» = 3
M-o afiNGF. MEDIAN
CENT)
6
3
(«G/L)
6
3
10.6- 15.5
5.3- 5.7
8.4- 10.0
8.6- 8.6
11.9
5.5
9.1
*.6
)
«AX
DEPTH
RANGE
(METEKS)
0.0-
15.2-
0.0-
15.2-
1.5
33.5
1.5
33.5
N*
6
3
6
2
( 8/ 5/75
S««* = 3
RANGE MEDIAN
20.0- 21.2
11.6- 14.6
6.2- 8.2
0.3- 2.8
21.1
12.2
7.7
1.5
)
MAX
OEPTH
RANGE
(METERS)
0.0-
14.6-
0.0-
25.9-
1.5
31.4
1.5
31.4
N*
6
3
6
3
( 9/17/75 1
S»«« = 3
RANGE MEDIAN
17.4- 18.3
13.9- 17.4
7.0- 9.0
0.6- 7.6
17.5
15.5
7.6
1.4
»
MAX
DEPTH
RANGE
(METERS)
0.0- 1.5
7.0- 24.7
0.0- 1.5
7.0- 24.7
CONDUCTIVITY (UMHOS)
(
(
(
V
0.-1.5 M DEPTH
MAX DEPTH**
6
3
122.- 137.
116.- 122.
131.
117.
0.0-
15.2-
1.5
33.5
5
3
166.- 176.
150.- 166.
170.
161.
0.0-
14.6-
1.5
31.4
6
3
181.- 185.
171.- 183.
183.
181.
0.0- 1.5
7.0- 24.7
PH (STANDARD UNITS)
0.-1.5 M DEPTH
MAX DEPTH**
TOTAL ALKALINITY
0.-1.5 M DEPTH
MAX DEPTH**
TOTAL P (MG/L)
O.-l.'i M OEPTH
MAX DEPTH**
DISSOLVED ORTHO P
0.-1.5 M OEPTH
MAX DEPTH**
N02+N03 (MG/L)
0.-1.5 M OEPTH
MAX DEPTH**
AMMONIA (MG/L)
0.-1.5 M OEPTH
VAX DEPTH**
KJELOAHL N (MG/L)
0.-1.5 M DEPTH
^AX DEPTH**
6
3
(MG/L)
6
3
6
3
(MG/L)
6
3
6
3
6
3
6
3
7.1- 8.3
7.5- 7.9
66.- 90.
85.- 95.
0.083-0.115
O.OS1-0.135
0.025-0.051
0.034-0.050
0.320-0.430
0.460-0.500
0.040-0.060
0.050-0.070
0.500-1.100
0.400-0.600
8.0
7.5
81.
9?.
0.097
0.084
0.033
0.044
0.3R5
0.470
0.045
0.060
0.700
0.600
0.0-
15.2-
0.0-
15.2-
0.0-
15.2-
0.0-
15.2-
0.0-
15.2-
0.0-
15.2-
0.0-
15.2-
1.5
33.5
1.5
33.5
1.5
33.5
1.5
33.5
1.5
33.5
1.5
33.5
1.5
33.5
5
3
6
3
6
3
6
3
6
3
6
3
6
3
8.8- 8.9
7.4- 8.1
88.- 95.
96.- 104.
0.011-0.024
0.027-0.129
0.005-0.013
0.021-0.067
0.020-0.020
0. 1 10-0.240
0.020-0.030
0.050-0.150
0.200-0.200
0.200-0.400
8.8
7.7
94.
96.
0.013
0.129
0.011
0.029
0.020
0.200
0.020
0.060
0.200
0.300
0.0-
14.6-
0.0-
14.6-
0.0-
14.6-
0.0-
14.6-
0.0-
14.6-
0.0-
14.6-
0.0-
14.6-
1.5
31.4
1.5
31.4
1.5
31.4
1.5
31.4
1.5
31.4
1.5
31.4
1.5
31.4
6
3
6
3
6
3
6
3
6
3
6
3
6
3
8.4- 8.8
7.6- 8.6
106.- 116.
103.- 116.
0.033-0.058
0.041-0.289
0.005-0.010
0.004-0.165
0.020-0.020
0.020-0.100
0.020-0.020
0.020-0.330
0.200-0.400
0.200-0.600
8.5
7.7
115.
113.
0.038
0.145
0.006
0.085
0.020
0.020
0.020
0.080
0.250
0.400
0.0- 1.5
7.0- 24.7
0.0- 1.5
7.0- 24.7
0.0- 1.5
7.0- 24.7
0.0- 1.5
7.0- 24.7
0.0- 1.5
7.0- 24.7
0.0- 1.5
7.0- 24.7
0.0- 1.5
7.0- 24.7
SECCHI DISC
0.3- 0.9
0.4
4.9- 4.9
4.9
1.2- 2.7
2.0
* N = NO. OF SAMPLES
«» MAXIMUM DEPTH SAMPLED AT EACH SITE
«** S = NO. OF SITES SAMPLED ON THIS DATE
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B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
05/15/75
08/05/75
09/17/75
Dominant
Genera
1.
2.
3.
Stephanodiscus
Chroomonas
Cryptomonas
Other genera
Total
1.
2.
3.
4.
5.
Chroomonas
Cryptomonas
Frag il aria
Asterionella
Anabaena
Other genera
Total
1. Aphanizomenon
2. Ceratium
3. Chroomonas
4. Melosira
5. Cryptomonas
Other genera
Total
Algal
Units
per ml
4,099
592
42
4,733
132
75
75
56
38
56_
432
3,297
230
153
153
38
3,871
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2. Chlorophyll a_ -
Sampling Station Chlorophyll a_
Date Number (,'9/1)
05/15/75 01 11.6
02 2.6
03 1.3
08/05/75 01 2.1
02 4.4
03 2.2
09/17/75 01 27.3
02 7.2
03 7.2
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10
C. Limiting Nutrient Study:
1. Autoclavedj filtered, and nutrient spiked -
a. 05/15/75
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0
1.00 N
Ortho P
Cone. (mg/1)
0.025
0.075
N 0.075
0.025
Inorganic N
Cone. (mg/1 )
0.450
0.450
1.450
1.450
Maximum Yield
(mg/1 -dry wt. )
8.3
16.5
28.8
7.8
b. 09/17/75
Control 0.020 0.070 1.3
0.05 P 0.070 0.070 1.1
0.05 P + 1.0 N 0.070 1.070 15.3
l.OON 0.020 1.070 2.6
2. Discussion -
The control yields of the assay alga, Selenastrum
capricornutum, indicate that the potential primary pro-
ductivity of Magic Reservoir was high at the time of both
sample collections (05/15/75, 09/17/75). In the May assay,
a significant increase in yield occurred when phosphorus was
added alone and in combination with nitrogen, indicating
phosphorus limitation. The addition of only nitrogen resulted
in a yield which was not significantly greater than that of
the control. In the September assay, the addition of nitrogen
alone produced a slight increase in yield over that of the
control, suggesting nitrogen limitation at that time. The ad-
dition of phosphorus alone did not result in a yield greater
than that of the control.
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11
The mean inorganic nitrogen to orthophosphorus (N/P)
ratios in the lake data were 13/1, <6/l, and <3/l in the
spring, summer, and fall, respectively, suggesting primary
limitation by nitrogen (a mean N/P ratio of 14/1 or greater
generally reflects phosphorus limitation).
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12
IV. NUTRIENT LOADINGS
(See Appendix D for data).
For the determination of nutrient loadings, the Idaho
National Guard collected monthly near-surface grab samples from
each of the tributary sites indicated on the map (page v), ex-
cept for the high runoff months of June and July when two sam-
ples were collected. Sampling was begun in October 1974, and
was completed in September, 1975.
Through an interagency agreement, stream flow estimates for
the year of sampling and a "normalized" or average year were pro-
vided by the Idaho District Office of the USGS for the tributary
sites nearest the lake.
In this report, nutrient loads for sampled tributaries were
determined by using a modification of a USGS computer program for
calculating stream loadings. Nutrient loadings indicated for
tributaries are those measured minus known point source loads, if
any.
Nutrient loadings for unsampled "minor tributaries and imme-
diate drainage" ("ZZ" of USGS) were estimated by using the mean
annual nutrient loads, in kg/km2/yr, in Camas Creek and Rock Creek
at Stations C-l and E-l, and multiplying the means by the ZZ
area in km?.
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13
Monthly chemistry and flow data for the Ketchum and
Hailey wastewater treatment plants, and nutrient loads for
the Mountain Meadows Mobile Home Park plant were ^ovided
by the Idaho Department of Health and Welfare (M. Smith,
1976).
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14
A. Waste Sources:
1. Known municipal -
Name
Ketchum
Hailey
Mountain Meadows
Mobile Home Park
Pop.*
Served
300
Treatment*
2,840t Extended
aeration
1,450 Extended
aeration
Extended
Mean Flow
(m3/d x IP3)
4.383
1.086
0.114**
aeration
Receiving
Water
Big Wood
River
Big Wood
River
Big Wood
River
2. Known industrial - None
*M. Smith, 1976.
^Estimated at 0.3785 m3/capita/day.
tFlow and nutrient loadings from Ketchum - Sun Valley plant also
include an estimated 6,260 peak winter nonresidents and 4,440 peak
summer nonresidents.
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15
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
A-2 Big Wood River 9,310 22.8
C-l Camas Creek 18,335 45.0
D-l Poison Creek 915 2.3
E-l Rock Creek 1,180 2.9
b. Minor tributaries and immediate
drainage (nonpoint load) - 1,960 4.8
c. Known municipal STP's -
Ketchum 6,195 15.2
Hailey 2,080 5.1
Mountain Meadows Mobile 495 1.2
Home Park
d. Septic tanks* - 5 <0.1
e. Known industrial - None
f. Direct precipitation** - 275 0.7
Totals 40,750 100.0
2. Output - A-l Big Wood River 16,845
3. Net annual P accumulation - 23,905
*Estimate based on 31 lakeshore residences (summer use only)
**Estimated (see NES Working Paper No. 175).
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16
C.. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
A-2 Big Wood River 178,555 43.7
C-l Camas Creek 139,530 34.1
D-l Poison Creek 11,160 2.7
E-l Rock Creek 12,485 3.1
b. Minor tributaries and immediate
drainage (nonpoint load) s 17,840 4.4
c. Known municipal STP's -
Ketchum 24,325 5.9
Hailey 7,020 1.7
Mountain Meadows Mobile 910 0.2
Home Park
d. Septic tanks* - 110 <0.1
e. Known industrial - None
f. Direct precipitation** - 17,060 4.2
Totals 408,995 100.0
2. Output - A-l Big Wood River 359,260
3. Net annual fl accumulation - 49,735
*Estimate based on 31 lakeshore residences (summer use only)
**Estimated (see NES Working Paper No. 175).
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17
D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
Tributary kg P/km^/yr kg N/km^/yr
Big Wood River 4 83
Camas Creek 11 83
Poison Creek 49 597
Rock Creek 11 118
E. Mean Nutrient Concentrations in Ungaged Streams:
Mean Total P Mean Total N
Tributary (mg/1) (mg/1)
B-l Lava Creek * 0.053 0.577
F-l Camp Creek 0.071 0.688
Nutrient levels for these ungaged tributaries to Magic
Reservoir are in line with those found in Big Wood River and
Camas Creek, but somewhat lower than those found in the other
two gaged tributaries to the lake.
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18
F. Yearly Loadings:
In the following table, the existing phosphorus annual
loading is compared to the relationship proposed by Vollenweider
(1975). Essentially, his "eutrophic" loading is that at which
the receiving water would become eutrophic or remain eutrophic;
his "oligotrophic" loading is that which would result in the
receiving water remaining oligotrophic or becoming oligotrophic
if morphometry permitted. A "mesotrophic" loading would be
considered one between "eutrophic" and "oligotrophic".
Note that Vollenweider's model may not apply to lakes with
short hydraulic retention times or in which light penetration is
severely restricted by high concentrations of suspended solids
in the surface waters.
Total Yearly
Phosphorus Loading
(g/m2/yr)
Estimated loading for Magic Reservoir 2.58
Vollenweider's "eutrophic" loading 1.08
Vollenweider's "oligotrophic" loading 0.54
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19
V. LITERATURE REVIEWED
Falter, C. Michael. 1973. Limnology of Magic Reservoir,
Big Wood River, Idaho. University of Idaho, Moscow, Idaho.
Submitted to: U.S. Army Corps of Engineers, Wall^ Walla
District, Idaho.
Martin, R. 0. R. and Ronald L. Hansen. 1966. Reservoirs
in the United States. U.S.G.S. Water-Supply Paper 1838.
U.S. Gov't Printing Office, Washington, D.C.
Smith, Michael A. 1976. Personal communication (sewage
treatment plant information). Idaho Department of Health
and Welfare, Division of Environment. Boise, Idaho.
U.S. Environmental Protection Agency. 1975. National Eutro-
phication Survey Methods 1973-1976. Working Paper No. 175.
National Environmental Research Center, Las Vegas, Nevada,
and Pacific Northwest Environmental Research Laboratory,
Corvallis, Oregon.
U.S. Geological Survey. 1972. Water Resources Data for
Idaho, Part 1. U.S. Department of the Interior, Surface
Water Records, Boise, Idaho.
Vollenweider, R. A. 1975. Input-Output Models With Special
Reference to the Phosphorus Loading Concept in Limnology.
Schweiz. Z. Hydrol. 37:53-84.
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20
VI. APPENDICES
APPENDIX A
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 B
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR IDAHO
LAKE CODE 1609 MAGIC RES.
TOTAL ORAINAGF AREA OF LAKECSO KM) 4144.0
08/23/76
SUB-DRAINAGE
TRIBUTARY AREA4
3.40
0.54
0.0
0.17
0.17
0.99
2.75
1.13
0.006
0.23
0.23
15.66
9.29
5.29
0.035
0.32
0.48
SUMMARY
TOTAL DRAINAGE AREA OF LAKE =
SUM OF SUB-DRAINAGE AREAS =
4144.0
4144.1
TOTAL FLOW
TOTAL FLOW
IN
OUT
185.14
187.34
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
1609A1
1609A2
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
74
74
74
75
75
75
75
75
75
75
75
75
74
74
74
75
75
75
75
75
75
75
75
75
FLOW DAY
FLOW DAY
FLOW
4.134
1.472
0.204
0.195
0.207
0.227
25.598
41.258
58.531
44.911
28.798
21.776
3.030
3.766
2.917
1.699
1.699
2.464
4.474
23.361
40.550
37.548
5.918
2.435
19
16
14
18
17
15
12
17
7
5
14
20
19
16
14
18
17
15
12
17
7
5
14
20
0.244
2.945
0.195
0.195
0.207
0.218
40.776
102.507
79.004 21
63.430 19
30.582
21.577
2.294
3.483
3.115
1.699
1.812
2.379
3.058
43.891
64.846 21
51.253 19
6.456
2.350
45.873
30.582
28.883
35.396
-------
TRIBUTARY FLOW INFORMATION FOR IDAHO
08/23/76
LAKE CODE 1609
MAGIC RES.
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
1609C1
1609D1
1609E1
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
74
74
74
75
75
75
75
75
75
75
75
75
74
74
74
75
75
75
75
75
75
75
75
75
74
74
74
75
75
75
75
75
75
75
75
75
FLOW DAY
FLOW DAY
FLOW
0.249
0.566
0.566
0.566
0.793
1.557
21.776
41.484
8.099
2.633
0.241
0.269
0.0
0.0
0.0
0.0
0.0
0.008
0.147
0.280
0.054
0.017
0.0
0.0
0.127
0.176
0.176
0.176
0.198
0.261
0.708
0.906
0.481
0.311
0.127
0.133
19
16
14
18
17
15
12
17
7
5
14
20
19
1*
14
18
17
15
1?
19
7
5
10
20
11
16
14
18
17
15
1?
17
7
•S
14
20
0.224
0.680
0.566
0.651
0.765
1.388
2.492
47.572
10.336
4.106
0.156
0.340
0.0
0.0
0.0
0.0
0.0
0.006
0.014
0.252
0.068
0.025
0.0
0.0
0.125
0.190
0.176
0.187
0.198
0.249
0.311
0.963
0.538
0.368
0.108
0.144
21
19
21
14
21
19
5.947
7.221
0.040
0.0
0.425
0.311
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
STORtT RETRIEVAL DATE 76/08/35
NATL EUTROPHICATION SURVEY
EPA-LAS VEGAS
160903
43 18 42.0 114 23 37.0 3
MAGIC RESERVOIR
16013 IDAHO
130691
11EPALES 2111202
0055 FEET DEPTH CLASS 00
DATE
FROM
TO
75/05/15
75/08/05
75/09/17
DATE
FROM
TO
75/05/15
75/08/05
75/09/17
TIME DEPTH
OF
DAY FEET
15 10 0000
15 10 0005
15 10 0015
15 10 0030
15 10 0050
07 45 0000
07 45 0005
07 45 0015
07 45 0030
07 45 0048
10 55 0000
10 55 0005
10 55 0015
10 55 0023
TIME DEPTH
OF
DAY FEET
15 10 0000
15 10 0005
15 10 0015
15 10 0030
15 10 0050
07 45 0000
07 45 0005
07 45 0015
07 45 0030
07 45 0048
10 55 0000
10 55 0005
10 55 0015
10 55 0023
00010
MATER
TEMP
CENT
15.5
10.6
7.4
6.1
5.7
21.1
21.2
20.6
16.9
14.6
17.4
17.4
17.5
17.4
00665
PHOS-TOT
MG/L P
0.115
0.096
0.082
0.083
0.081
0.013
0.011
0.013
0.027
0.027
0.033
0.033
0.038
0.041
00300
DO
MG/L
8.
8.
8.
9.
8.
7.
7.
7.
5.
7.
7.
7.
7.
32217
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
8 12
4
8
2
6
4 192
4
2
8
6 108
6
8
6
00031
133
137
118
117
117
168
171
195
166
183
185
187
183
00400 00410
PH T ALK
CAC03
su
8.00
7.90
7.60
7.80
7.50
8.90
8.90
8.20
8.10
8.40
8.50
8.60
8.60
MG/L
66
82
82
83
85
93
94
94
111
104
115
116
117
116
00610 00625 00630 00671
NH3-N TOT KJEL N02&N03 PHOS-OIS
TOTAL N N-TOTAL ORTHO
MG/L
0.060
0.050
0.040
0.030
0.050
0.030
0.020
0.020
0.040
0.050
0.020K
0.020K
0.020K
0.020K
MG/L
0.900
0.600
0.400
0.400
0.400
0.200K
0.200K
0.200K
0.200K
0.200K
0.400
0.400
0.200
0.200K
M6/L
0.320
0.380
0.480
0.500
0.500 ,
0.020K
0.020K
0.020K
0.060
0.110
0.020K
0.020K
0.020K
0.020K
MG/L P
0.035
0.032
0.035
0.034
0.034,
0.013
0.011
0.011
0.018
0.021
0.010
0.006
0.005
0.004
CHLRPHYL INCDT LT
A
UG/L
1.
2.
REMNING
PERCENT
3
2
7.2
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STORET RETRIEVAL DATE 76/08/35
NflTt EUTROPHICATIOM SURVEY
EPA-LAS VEGAS
DATE
FROM
TO
75/05/15
75/08/05
75/09/17
TIME DEPTH
OF
DAY
14
14
14
14
14
14
14
08
08
08
08
08
08
08
11
11
11
11
11
11
FEET
00
00
00
00
00
00
00
45
45
45
45
45
45
45
20
20
20
20
20
20
0000
0005
0015
0025
0050
0080
0110
0000
0005
0020
0035
0055
0075
0103
0000
0005
0015
0030
0050
0081
00010
HATER
TEMP
CENT
12.3
11.1
9.8
8.1
6.1
5.8
5.5
21.2
21.1
20.6
16.8
U.O
12.8
11.6
18.3
18.3
18.3
18.3
18.2
13.9
160901
43 15 28.0 lift 21
MAGIC RESERVOIR
16013 IDAHO
37.0 3
130691
HEPALES 2111202
0114 FEET DEPTH CLASS 00
00300
00
MG/L
9.3
10.0
10. 3
9.6
9.2
8.8
8.6
8.0
6.2
6.4
6.2
4.6
0.6
0.3
8.6
9.0
8.6
9.0
9.0
0.6
00077 00094
TRANSP CNDUCTVY
<=ECCHI FIELD
INCHES WICROMHO
36 132
129
129
136
121
121
122
192 166
170
166
171
161
162
161
48 183
181
183
183
183
171
00400
PH
su
8.30
8.10
8.00
7.50
8.00
7.30
7.90
8.80
8. BO
8.00
8.00
7.80
7.50
7.40
8.80
8.85
8.85
8.90
8.55
7.70
00410
T ALK
CAC03
MG/L
90
87
90
91
91
93
92
88
88
89
91
91
94
96
114
115
115
100
100
103
00610
NH3=N
TOTAL
MG/L
0.060
0.040
0.030
0.040
0.040
0.040
0.070
0.030
0.020
0.030
0.020
0.020
0.150
0.150.
0.020K
0.020K
0.020K
0.020K
0.050
0.330
00625
TOT KJEL
N
MG/L
1.100
0.600
0.600
0.500
0.400
0.400
0.600
0.200
0.200
0.200K
0.200
0.200K
0.400
0.400
0.200K
0.200
0.600
0.400
0.600
0.600
00630
N026.N03
N-TOTAL
MG/L
0.370
0.420
0.410
0.430
0.470
0.470
0.460.
0.020
0.020K
0.020K
0.040
0.1SO
0.200
0.200,
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PKOS-DIS
ORTHO
KG/L P
0.027
0.025
0.034
0.026
0.051
0.045
0.050
0.008
0.005
0.004
0.006
0.020
0.063
0.067
0.005
0.007
0.006
0.014
0.030
0.165
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
NATL EUTROPHICATION SURVEY
EPA-LAS VEGAS
160901
43 15 28.0 11* 21
MAGIC RESEHVOIR
16013 IDAHO
11EPALES
0114 FEET
27.0 3
130691
DEPTH
2111202
CCflSS 00
00665
DATE TIME DEPTH PHOS-TOT
FROM OF
TO DftY FEET MG/L P
75/05/15
75/08/05
75/09/17
14
14
14
14
14
14
14
08
08
08
08
08
08
08
11
11
11
11
11
11
00
00
00
00
00
00
00
45
45
45
45
45
45
45
20
20
20
20
20
20
0000
0005
0015
0025
0050
0080
0110
0000
0005
0020
0035
0055
0075
0103
0000
0005
0015
0030
0050
0081
0.098
0 = 083
0.076
0.075
0.075
0.076
0.135
0.024
0.021
0.018
0.032
0.039
0.119
0.129
0.053
0.058
0.050
0.066
0.089
0.289
32217
CHLRPHVL
A
UG/L
Ilo6
00031
INCDT LT
REMN1NG
PERCENT
2.1
27.3
-------
STORET RETRIEVAL DATE 76/08/25
NATL EUTROPHICATION SURVEY
EPA-LAS VEGAS
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/05/15 14
14
14
14
14
14
75/08/05 08
08
08
08
08
08
75/09/17 09
09
09
09
09
09
35 0000
35 0005
35 0015
35 0030
35 0060
35 0090
20 0000
20 0005
20 0015
20 0033
20 0055
20 0085
50 0000
50 0005
50 0015
50 0030
50 0045
50 0068
00010
WATER
TEMP
CENT
11.6
12.8
9.5
6.1
5.5
5.3
21.1
20.0
20.9
17.0
14.1
12.2
17.6
17.5
17.6
17.5
17.0
15.5
160903
43 17 05.0 114 22 28.0 3
MAGIC RESERVOIR
16013 IDAHO
130691
11EPALES
00300
DO
MG/L
9.6
8.9
9.0
9.2
9.2
8.6
8.0
8.2
7.8
6.0
3.0
2.8
7.2
7.0
7.2
7.2
6.0
1.4
00077 00094
TRANSP CNOUCTVY
«:ECCHI FIELD
INCHES MICROMHO
14 122
126
120
118
117
116
192 176
172
172
164
152
150
183
183
183
183
189
181
009-
00400
PH
SU
8.00
7.10
7.70
7.50
7.40
7.50
8.80
8.80
8.70
8.00
7.70
7.70
8.40
8.50
8.50
8.45
8.15
7.65
t FEET OEf
00410
T ALK
CAC03
MG/L
72
79
88
92
92
95
94
95
96
104
95
96
106
109
110
111
114
113
2111202
>TM CLiSS
00610
NH3-N
TOTAL
MG/L
0.040
0.040
0.040
0.050
0.040
0.060
0.020
0.020
0.030
0.030
0.050
0.060.
0.020K
0.020K
0.020K
0.020K
0.020K
0.080
CO
00625
TOT KJEL
N
MG/L
0.800
0.500
0.500
0.500
0.500
0.600
0.200K
0.200K
0.200K
0.200K
0.200
0.300
0.200
0.300
0.200
0.200
0.200
0.400
00630
N02S.N03
N-TOTAL
MG/L
0.390
0.430
0.490
0.500
0.490
0.470
0.020K
0.020K
0.020K
0.020
0.180
0.240,
0.020K
0.020K
0.020K
0.020K
0.040
0.100
00671
PHOS-DIS
OHTHO
MG/L P
0.048
0.051
0.034
0.033
0.034
0.044
0.011
0.011
0.011
0.013
0.024
0.029
0.006
0.005
0.005
0.006
0.014
0.085
DATE
FROM
TO
75/05/15
75/08/05
75/09/17
00665 32217 00031
TIME DEPTH PHOS-TOT CHLRPHYL INCDT LT
OF A REMNING
DAY FEET
14
14
14
14
14
14
08
03
08
08
08
08
09
09
09
09
09
09
35
35
35
35
35
35
20
20
20
20
20
20
50
50
50
50
50
50
0000
0005
0015
0030
0060
0090
0000
0005
0015
0033
0055
0085
0000
0005
0015
0030
0045
0068
MG/L P
n.
0.
0.
0,
0.
0.
0.
0,
0,
0.
0,
0.
0,
0,
0,
0,
0,
0.
,103
,089
,079
,076
,076
,084
,014
,011
,017
.020
.108
.129
,039
,038
.040
.033
.044
.145
UG/L PERCENT
2.6
4.4
7.2
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STORET RETRIEVAL DATE 76/08/25
NATL EUTROPHICATION SURVEY
EPA-LAS VEGAS
160903
43 18 42.0 114 23 37.0 3
MAGIC RESERVOIR
16013 IDAHO
130691
11EPALES 2111202
0055 FEET DEPTH CLASS 00
DATE
FROM
TO
75/05/15
75/08/05
75/09/17
DATE
FROM
TO
75/05/15
75/08/05
75/09/17
TIME DEPTH
OF
DAY FEET
15 10 0000
15 10 0005
15 10 0015
15 10 0030
15 10 0050
07 45 0000
07 45 0005
07 45 0015
07 45 0030
07 45 0048
10 55 0000
10 55 0005
10 55 0015
10 55 0023
TIME DEPTH
OF
DAY FEET
15 10 0000
15 10 0005
15 10 0015
15 10 0030
15 10 0050
07 45 0000
07 45 0005
07 45 0015
07 45 0030
07 45 0048
10 55 0000
10 55 0005
10 55 0015
10 55 0023
00010
WATER
TEMP
CENT
15.5
10.6
7.4
6.1
5.7
21.1
21.2
20.6
16.9
14.6
17.4
17.4
17.5
17.4
00665
PHOS-TOT
MG/L P
0.115
0.096
0.082
0.083
0.081
0.013
0.011
0.013
0.027
0.027
0.033
0.033
0.038
0.041
00300 00077 00094
DO TRANSP CNDUCTVY
SECCHI FIELD
MG/L INCHES MICROMHO
8.6 12
8.4
8.8
9.2
8.6
7.4 192
7.4
7.2
5.8
7.6 108
7.6
7.8
7.6
32217 00031
CHLRPHYL INCDT LT
A REMNING
UG/L PERCENT
1.3
2.2
7.2
133
137
118
117
117
168
171
195
166
183
185
187
183
00400 00410
PH T ALK
CAC03
SU
8.00
7.90
7.60
7.80
7.50
8.90
8.90
8.20
8.10
8.40
8.50
8.60
8.60
MG/L
66
B2
82
83
85
93
94
94
111
104
115
116
117
116
00610 00625 00630 00671
NH3-N TOT KJEL N02&N03 PHOS-DIS
TOTAL N N-TOTAL ORTHO
MG/L
0
0
0
0
0
0
0
0
0
0
0
0
0
0
.060
.050
.040
.030
.050
.030
.020
.020
.040
.050
.020K
.020K
.020K
.020K
MG/L
0.900
0.600
0.400
0.400
0.400
0.200K
0.200K
0.200K
0.200K
0.200K
0.400
0.400
0.200
0.200K
MG/L
0.320
0.380
0.4*0
0.500
0.500 .
0.020K
0.020K
0.020K
0.060
0.110
0.020K
0.020K
0.020K
0.020K
MG/L P
0.035
0.032
0.035
0.034
0.034^
0.013
0.011
0.011
0.018
0.021.
0.010
0.006
0.005
0.004
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
APPENDIX D
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 76/08/35
NATL EUTROPHICATION SURVEY
EPA- LAS VEGAS
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/04/12
75/05/17
75/06/07
75/06/31 10 45
75/07/05 13 30
75/07/19 08 00
75/08/14 17 30
75/09/20 12 30
1609A1
43 15 05.0 114 21 30.0 4
BIG WOOD RIVER
16 15 BELLEVUE
0/MAGIC RESERVOIR 130691
8NK BELO MAGIC DAM ON DRT RD
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
!&N03
OTAL
IG/L
0.105
0.315
0.280
0.005
0.005
0.005
0.110
0.035
00625
TOT KJEL
N
MG/L
1.000
0.450
0.737
0.700
0.500
0.900
0.250
0.600
00610
NH3-N
TOTAL
MG/L
0.025
0.015
0.030
0.020
0.015
0.025
0.015
0.045
00671
PHOS-DIS
ORTHO
MG/L P
0.015
0.020
0.025
0.005
0.010
0.007
0.020
0.015
00665
PHOS-TOT
MG/L P
0.020
0.050
0.045
0.030
0.030
0.020
0.030
0.040
-------
STORET RETRIEVAL DATE 76/08/35
NATL EUTROPHICATION SURVEY
EPA- LAS VEGAS
DATE TIME DEPTH N02&.N03
FROM OF
TO DAY FEET
74/10/19
74/11/16
74/12/14
75/01/18
75/02/17
75/03/15
75/04/12
75/05/17
75/06/07
75/06/21
75/07/05
75/07/19
75/08/14
75/09/20
09
10
12
11
16
11
13
11
11
18
10
10
00
30
45
00
15
30
31
00
30
00
1609A2
43 19 45.0 114 31 30.0 4
BIG MOOD RIVER
16 15 8ELLEVUE
T/MAGIC RESERVOIR 130691
SURGING BRDG 600 FT S OF RT 68 JCT
11EPALES 3111304
OOQQ FEET DEPTH CLASS 00
0630
S,N03
OTAL
G/L
0.112
0.088
0.168
0.380
0.272
0.280
0.180
0.315
0.160
0.150
0.105
0.145
0.065
0.055
00625
TOT KJEL
N
MG/L
0.500
0.300
0.200
0.500
0.900
0.300
1.300
0.600
0.300
0.475
0.850
0.350
0.100
00610
NH3-N
TOTAL
MG/L
0.015
0.010
0.035
0.030
0.034
0.050
0.125
0.025
0.030
0.020
0.020
0.025
0.015
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.005
0.005
0.010
0.015
0.008
0.010
0.015
0.040
0.030
0.015
0.020
0.015
0.010
0.010
00665
PHOS-TOT
MG/L P
0.015
0.010K
0.020
0.015
0.020
0.030
0.030
0.060
0.080
0.140
0.040
0.070
0.070
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
NATL EUTROPHICATION SURVEY
EPA- LAS VEGAS
00630
DATE TIME DEPTH N02S.N03
FROM OF N-TOTAL
TO DAY FEET MG/L
75/03/15 08 30
75/05/17
75/06/07
75/06/21 11 30
0.020
0.005
0.005
0.005
00625
TOT KJEL
N
MG/L
0.500
0.450
0.750
1609B1
43 17 45.0 114 26 00.0 4
LAVA CREEK
16 15 BELLEVUE
T/MAGIC RESERVOIR 130691
UNMPRVD RO XING 2.5 M NW OF MAGIC RESORT
11EPALES 211120*
oooo FEET DEPTH CLASS oo
00610
NH3-N
TOTAL
MG/L
0.020
0.015
0.020
0.020
00671
PHOS-DIS
ORTHO
MG/L P
0.065
0.045
0.010
0.010
00665
PHOS-TOT
MG/L P
0.100
0.040
0.020
-------
STORET RETRIEVAL DATE 76/08/35
NATL EUTROPHICATION SURVEY
EPA- LAS VEGAS
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/10/19
74/11/16
74/12/14
75/01/18
75/02/17
75/03/15
75/04/12
75/05/17
75/06/07
75/06/21
75/07/05
75/07/19
75/08/14
75/09/20
11
09
13
10
10
10
09
12
09
17
00
00
30
45
00
15
00
00
00
45
1609C1
43 19 59.0 11* 32 27.0 4
CAMUS CREEK
16 15 BLAINE
T/MAGIC RESERVOIR 130692
MACON SHEEP BRDG END RD .8 M S HKY 68 JT
11EPALES 2111204
COOC FEET DEPTH. CLASS 00
0630
&N03
OTAL
IG/L
1.560
0.600
0.736
0.820
0.820
0.450
0.350
0.220
0.115
0.170
0.180
0.230
1.720
1.250
00625
TOT KJEL
N
MG/L
0.300
0.200
0.800
0.500
1.200
0.350
2.200
0.350
1.200
0.650
0.500
0.400
1.200
0.300
00610
NH3-N
TOTAL
MG/L
0.055
0.010
0.055
0.113
0.128
0.050
0.090
0.040
0.030
0.030
0.015
0.010
0.015
0.020
00671
PHOS-DIS
ORTHO
MG/L P
0.025
0.020
0.030.
0.035
0.080
0.050
0.045
0.050
0.045
0.035
0.045
0.035
0.025
0.020
00665
PHOS-TOT
MG/L P
0.035
0.030
0.070
0.040
0.098
0.080
0.080
0.100
0.230
0.070
0.070
0.060
0.060
0.050
-------
NA L I'J'1 K0i"'i L'.A , Ux
EPA- LAS VEGAS
DATE TIME DEPTH N02S.N03
FROM OF
TO DAY FEET
75/03/15 10 45
75/04/12
75/05/19
75/06/07
75/06/21 12 00
75/07/05 09 20
43 20 38.0 114 25 00.0 4
POISON CREEK
16 15 BELLEWUE
T/MAGIC RESERVOIR 130691
UNMPRVD RO XING 1 MI N« HOT SPRNGS LNDNG
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
S.N03
OTAL
G/L
0.115
0.260
0.195
0.025
0.015
0.020
00625
TOT KJEL
N
MG/L
0.200
1.600
0.900
0.550
0.450
0.650
00610
NH3-N
TOTAL
MG/L
0.010
0.113
0.035
0.020
0.030
0.025
00671
PHOS-DIS
ORTHO
MG/L P
0.045
0.115
0.060
0.055
0.045
0.070
00665
PHOS-TOT
MG/L P
0.050
0.160
0.080
0.100
0.050
0.110
-------
STORET RETRIEVAL DATE 76/08/25
NATL EUTROPHICATION SURVEY
EPA- LAS VEGAS
00630 00625 00610 00671
DATE TIME DEPTH N02S.N03 TOT KJEL NH3-N PHOS-DIS
FROM OF N-TOTAL N TOTAL ORTHO
TO DAY FEET MG/L MG/L MG/L MG/L P
0.088 0.200 0.015 0.015
0.480 0.300 0.010 0.040
0.650 0.400 0.020 0.035
0.600 0.400. 0.035 0.040
0.504 0.900 0.032 0.040
0.375 0.400 0.010 0.045
0.450 1.700 0.100 0.055
0.550 0.400 0.015 0.065
0.260 1.100 0.030 0.060
0.230 1.050 0.025 0.055
0.430 0.800 0.035 0.090
0.170 1.550 0.030 0.085
0.035 0.800 0.015 0.055
0.120 1.300 0.135 0.065
74/10/19
74/11/16
74/12/14
75/01/18
75/02/17
75/03/15
75/04/12
75/05/17
75/06/07
75/06/21
75/07/05
75/07/19
75/08/14
75/09/20
09
09
14
11
10
11
12
14
10
18
10
35
45
10
30
30
00
01
30
00
30
30
1609E1
43 20 05.0 114 21 30.0 4
ROCK CREEK
16 15 BELLEVUE
T/HAGIC RESERVOIR 130691
RT 68 BRDG 5.3 MI W OF RT 93 JCT
11EPALES _ 2111204
0000 FEET DEPTH CL»55 00
00665
PHOS-TOT
MG/L P
0.025
0.040
0.070
0.080
0.050
0.100
0.260
0.110
0.120
0.080
0.120
0.130
0.080
0.090
-------
STORET RETRIEVAL DATE 76/08/35
NATL EUTROPHICATION SURVEY
EPA- LAS VEGAS
DATE TIME DEPTH N02S.N03
FROM OF
TO DAY FEET
74/10/19
74/11/16
74/12/14
75/01/18
75/02/17
75/03/15
75/04/12
75/05/17
75/06/07
75/06/21
75/07/05
75/07/19
75/08/14
75/09/20
10
09
13
10
11
10
14
10
12
19
11
40
15
45
30
30
00
00
02
00
00
00
1609F1
43 30 23.0 114 28 35.0 4
CAMP CREEK
16 15 8ELLEVUE
T/MAGIC RESERVOIR 130691
HWY 68 9RDG 10 MI ¥ OF US HXY 93 JCT
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
S.N03
OTAL
IG/L
0.184
0.152
0.168
0.144
0.136
0.140
0.125
0.390
0.055
0.035
0.020
0.035
0.050
0.120
00625
TOT KJEL
N
MG/L
0.400
0.300
0.400
0.700
0.300
0.300
1.300
1.500
0.800
0.300
0.450
0.400
0.425
0.300
00610
NH3-N
TOTAL
MG/L
0.035
0.015
0.020
0.025
0.024
0.010
0.040
0.020
0.025
0.030
0.015
0.015
0.015
0.060
00671
PHOS-DIS
ORTHO
MG/L P
0.037
0.040
0.030
0.035
0.032
0.030
0.050
0.055
0.045
0.085
0.060
0.055
0.040
00665
PHOS-TOT
MG/L P
0.070
0.040
0.050
0.078
0.060
0.090
0.070
0.100
0.070
0.092
0.060
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1975
STATE OF IDAHO
Mean or median values for six of the key parameters evaluated
in establishing the trophic conditions of Idaho lakes sampled are
presented to allow direct comparison of the ranking, by parameter,
of each lake relative to the others. Median total phosphorus, median
inorganic nitrogen and median dissolved orthophosphorus levels are
expressed in mg/1. Chlorophyll a_ values are expressed in yg/1.
To maintain consistent rank order with the preceding parameters,
the mean Secchi disc depth, in inches, is subtracted from 500.
Similarly, minimum dissolved oxygen values are subtracted from 15
to create table entries.
-------
LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
1601 AMERICAN FALLS RESERVOIR
1602 CASCADE LAKE
1603 LAKE COEUR O'ALENE
1604 DWOHSHAK RESERVOIR
1605 MAUSER
1606 HAYDEN LAKE
1607 ISLAND PARK RESERVOIR
1608 LAKE LOWELL
1609 MAGIC RESERVOIR
1610 PALISADES RESERVOIR
1611 LOWER PAYETTE
1612 LOWER TWIN LAKES
1613 UPPER TWIN LAKES
MEDIAN
TOTAL P
0.105
0.032
0.017
0.010
0.02S
0.010
0.034
0.070
0.062
0.024
0.013
0.016
0.017
MEDIAN
INORG N
0.030
0.060
0.040
0.080
0.075
0.040
0.050
0.070
0.130
0.080
0.060
0.050
0.045
500-
MEAN SEC
463.800
415.067
380.348
401.866
366.286
243.500
391.778
477.111
400.750
345.428
234.000
370.000
369.143
MEAN
CHLORA
15.379
8.031
10.391
2.420
11.112
2.787
9.322
25.389
7.322
2.067
4.600
2.318
4.986
15-
MIN DO
14.700
14.800
12.200
7.400
14.800 "
11.800
12.800
14.600
14.700
12.800
9.600
13.600
8.200
MEDI,
DISS ORTI
0.035
0.009
0.005
0.009
0.013
0.003
0.012
0.015
0.020
0.007
0.007
0.009
0.004
-------
PERCENT or LAKES WITH HIGHER VALUES (NUMBER or LAKES WITH HIGHER VALUES)
LAKE MEDIAN MEDIAN 500- MEAN 15- MEDIAN
CODE LAKE NAME TOTAL P INORG N MEAN SEC CHLORA MIN DO OISS ORTHO P
1601 AMERICAN FALLS RESERVOIR 0(0) 17 ( 1) 8(1) 8(1) 21 < 2) 0(0)
1602 CASCADE LAKE 33 (4) 54 ( 6) 17 ( 2) 42 ( 5) 4 ( 0) 50 ( 5)
1603 LAKE COEUR D'ALENE 67 (8) 96 ( 11) 50 (6) 25 < 3) 67 C 8) 83 ( 10)
1604 DWORSHAK RESERVOIR 96 ( ID 17 ( 1) 25 ( 3) 83 < 10) 100 ( 12) 50 ( 5)
1605 HAUSER 42 ( 5) 33 ( 4) 75 ( 9) 17 ( 2) 4 ( 0) 25 ( 3)
1606 KAYDEN LAKE 96 ( 11) 96 ( 11) 92 ( 11) 75 ( 9) 75 ( 9) 100 ( 12)
1607 ISLAND PARK RESERVOIR 25 (3) 71 ( 8) 42 (5) 33 ( 4) 54 (6) 33 ( 4)
1608 LAKE LOWELL 8 ( 1> 42 ( 5) 0(0) 0(0) 33 ( 4) 17 ( 2)
1609 MAGIC RESERVOIR 17 ( 2) 0(0) 33 ( 4) 50 ( 6) 21 < 2) 8 ( 1)
1610 PALISADES RESERVOIR 50 (6) 17 ( 1) 83 ( 10) 100 ( 12) 54 (6) 75 ( 9)
1611 LOWER PAYETTE 83 ( 10) 54 < 6) 100 ( 12) 67 (8) 83 ( 10) 67 ( 8)
1612 LO*ER TWIN LAKES 75 ( 9) 71 ( 8) . 58 ( 7) 92 ( 11) 42 (5) 50 ( 5)
1613 UPPER TWIN LAKES 58 (7) 83 ( 10) 67 (8) 58 ( 7) 92 ( 11) 92 ( 11)
------- |