U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
SAN CARLOS RESERVOIR
GILA, GRAHAM, AID FINAL COUNTIES
ARIZONA
EPA REGION IX
WORKING PAPER No, 736
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
SAN CARLOS RESERVOIR
GIIA, GRAHAM, AND FINAL COUNTIES
ARIZONA
EPA REGION IX
WORKING PAPER No, 736
WITH THE COOPERATION OF THE
ARIZONA STATE DEPARTMENT OF HEALTH
AND THE
ARIZONA NATIONAL GUARD
AUGUST, 1977
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REPORT ON SAN CARLOS RESERVOIR
GILA, GRAHAM, AND FINAL COUNTIES, ARIZONA
EPA REGION IX
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. 736
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
August 1977
-------
i
CONTENTS
Page
Foreword i i
List of Arizona Study Lakes iv
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Lake and Drainage Basin Characteristics 4
III. Lake Water Quality Summary 6
IV. Nutrient Loadings 12
V. Literature Reviewed 17
VI. Appendices 18
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ii
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, 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 nonpoint source pollution abatement in lake water-
sheds.
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
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
[§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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ill
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 formulation 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 Arizona State Department
of Health for professional involvement, to the Arizona National
Guard for conducting the tributary sampling phase of the Survey,
and to those Arizona wastewater treatment plant operators who
provided effluent samples and flow data.
The staffs of the Bureau of Water Quality Control, Environ-
mental Health Services, Arizona State Department of Health, and
the Arizona Game and Fish Department, provided invaluable lake
documentation and counsel during the Survey, reviewed the pre-
liminary reports and provided critiques most useful in the
preparation of this Working Paper Series.
Major General John G. Smith, the Adjutant General of Arizona,
and Project Officer Colonel Richard A. Col son, who directed the
volunteer efforts of the Arizona National Guardsmen, are also
gratefully acknowledged for their assistance to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY LAKES
STATE OF ARIZONA
LAKE NAME
Big Lake
Fools Hollow Lake
Lake Havasu
Luna Lake
Lyman Lake
Lake Mohave
Lake Pleasant
Lake Powell
Rainbow Lake
Theodore Roosevelt Lake
San Carlos Reservoir
COUNTY
Apache
Navajo
Mohave (San Bernadino
in CA)
Apache
Apache
Mohave (Clark in NV)
Yavapai, Maricopa
Coconino (Kane, Garfield,
San Juan in UT)
Navajo
Gil a
Graham, Gila, Pinal
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SAN CARLOS RESERVOIR
Sewage Treatment Facility
Tributary Sampling Site
X Lake Sampling Site
10 20 30 40
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REPORT ON SAN CARLOS RESERVOIR, ARIZONA
STORET NO. 0411
I. CONCLUSIONS
A. Trophic Condition:*
Survey data indicate that San Carlos Reservoir is eutrophic,
i.e., nutrient rich and highly productive. Whether such nutrient
enrichment is to be considered beneficial or deleterious is
determined by its actual or potential impact upon designated
beneficial water uses of each lake.
Chlorophyll a_ values in the lake ranged from 7.4 yg/1 to
33.2 yg/1, with a mean of 14.8 yg/1. Secchi disc visibility
was low and potentials for primary productivity as measured by
algal assay control yields were moderate. Of the 11 Arizona
lakes sampled in 1975, 3 had higher median total phosphorus
levels (0.056 mg/1), 5 had higher median inorganic nitrogen
values (0.060 mg/1) and 5 had higher median orthophosphorus
values (0.009) than San Carlos Reservoir.
s
Survey limnologists did not report any problem algal
blooms or macrophyte growths during their visits to the lake.
*See Appendix E.
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B. Rate-Limiting Nutrient:
Algal assay results indicate phosphorus limitation in San
Carlos Reservoir during March and November visits to the lake.
The lake data suggest nitrogen limitation throughout the lake
on all three sampling occasions.
C. Nutrient Controllability:
1. Point sources -
During the sampling year, point sources were calculated
to contribute 0.4% of the total phosphorus load to San Carlos
Reservoir. The city of San Carlos contributed 0.3% and the
Soda Canyon Recreation Area contributed 0.1%.
2
The present phosphorus loading of 9.35 g P/m /yr is twenty
times that proposed by Vollenweider (1975) as "eutrophic" for
a lake of such volume and retention time. Vollenweider's
model is not applicable to San Carlos Reservoir, however,
as large fluctuations in water level result from the reservoir's
use for downstream agricultural activities. Drawdown occurs
regularly and in low water years the lake is essentially
dry (W. H. Shafer, personal communication). Additional
sampling is needed to better define the nutrient budget of
the lake.
2. Nonpoint sources -
Nonpoint sources, including precipitation, contributed
99.6% of the total phosphorus input during the sampling year.
-------
The Gil a River contributed 92.4%, the San Carlos River contri-
buted 4.1% and minor tributaries and immediate drainage contri-
buted an estimated 2.9%.
-------
II. LAKE AND DRAINAGE BASIN CHARACTERISTICS
Lake and drainage basin characteristics are itemized below.
Lake morphometry data were provided by Ned Rathbun (1974). Average
surface area and the 1973 average volume are indicated. Tributary
flow data were provided by the Arizona District Office of the U.S.
Geological Survey (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. Precipi-
tation values were estimated by methods as outlined in NES Working
Paper No. 175. A table of metric/English conversions is included
as Appendix A.
A. Lake Morhphometry:
2
1. Surface area: 52.61 km.
2. Mean depth: 15.3 meters.
3. Maximum depth: 41.6 meters.
4. Volume: 806.679 x 10^ m3.
5. Mean hydraulic retention time: 1076 days (2.9 yr).
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B. Tributary and Outlet:
(See Appendix B for flow data)
1. Tributaries
Drainage^ Mean Flow
Name area (km ) (nr/sec)
A-2 Gila River 29,707.3 10.09
B-l San Carlos River 2,659.3 1.62
Minor tributaries and
immediate drainage - 954.9 0.51
Totals 33,321.5 12.22
2. Outlet - A-l Gila River 33,374.7 8.68
C. Precipitation:
1. Year of sampling: 39.9 cm.
2. Mean annual: 45.8 cm.
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III. LAKE WATER QUALITY SUMMARY
San Carlos Reservoir was sampled three times during the open-
water season of 1975 by means of a pontoon-equipped Huey helicopter.
Each time, samples for physical and chemical parameters were col-
lected from four stations on the lake (Station 04 was only sampled
once) and from one or more depths at each station (see map, page v).
During each visit, depth-integrated samples were collected from each
station for chlorophyll a_ analysis and phytoplankton identification
and enumeration. During the first and last visits, 18.9-liter
depth-integrated samples were composited for algal assays. Maximum
depths sampled were 21.3 meters at Station 01, 7.3 meters at Station
02, 4.9 meters at Station 03, and the surface at Station 04. 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 chloro-
phyll <± determinations are included in III-B. Results of the limiting
nutrient study are presented in III-C.
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SAN CARLOS
STOWET COOE 04H
A. PHYSICAL AND CHEMICAL CHARACTERISTICS
TEMPERATURE (DEC CtNT)
0.-1.=> M DEPTH
MAX DEPTH00
DISSOLVED 0*YGEN <^,
O.-l.S M r>E^r~i
MAX DF>TH°°
CONDUCTIVITY (IJWHOS)
C.-l.s M OE&T"
MAX DFPTH°°
PH (STANDARD IJMTSI
O.-l.S M DEPTH
MAX DFPTH°«
TOTAL ALKALINITY IMG/D
o.-i.s M DEPTH
MAX DEPTH00
TOTAL P (MG/L)
O.-l.S M DEPTH
MAX DEPTH00
DISSOLVED OHTHO P (MG/L)
O.-l.5 M DEPTH
MAX DEPTH00
N02 + N03
n.-l.s M OEkT"
MAX DFPTH00
AMMONIA (MG/L)
O.-l.S M DEPTH
MAX DEPTH00
KJELDAHL N (MG/L)
O.-l.S M OEPTH
MAX DEPTH00
SECCHI DISC (METERS)
N°
6
3
3
6
3
e>
3
.)
3
6
3
'L>
6
3
6
3
6
3
6
3
( 3/ 4/75 ]
RANGE MEDIAN
11.3- 13.0
8.9- 12.0
10.2- 13.2
3.8- 9.6
1232. -1305.
)?82.-1983.
7.9- 8.8
7.8- 8.1
166.- 172.
167.- 174.
0.021-0.030
0.036-0.171
0.004-0.017
0.007-0.011
0.020-0.060
0.020-0.100
0.020-0.040
0.030-0.120
0.400-1.600
0.600-0.600
11.9
?. 9
10.8
9.2
1267.
1479.
8.4
8.0
167.
171.
0.0?5
0.144
0.006
0.007
0.0?0
O.Oo.O
0.030
0.030
O.S50
0.600
I
MAX
DEPTH
RANGE
(METErfS) N«
0.0-
4.9-
0.0-
4.9-
0.0-
4.9-
0.0-
4.9-
0.0-
4.9-
0.0-
4.9-
0.0-
4.9-
0.0-
4.9-
0.0-
4.9-
0.0-
4.9-
1.5
21.3
1.5
21.3
1.5
21.3
1.5
21.3
1.5
21.3
1.5
21.3
1.5
21.3
2K3
1.5
21.3
1.5
21.3
6
3
6
3
6
3
7
4
7
4
7
4
7
4
7
4
7
4
7
4
( 6/18/75 )
S»«» r 4
HANGE MEDIAN
18.3- 24.3
15.3- 24.0
3.6- 8.6
0.4- 7.4
1217. -1547.
1051. -1547.
7.9- 8.5
7.8- 8.5
152.- 161.
152.- 166.
0.038-0.118
0.056-0.118
0.007-0.019
0.007-0.044
0.020-0.020
0.020-0.030
0.020-0.050
0.020-0.080
0.400-0.800
0.500-0.800
24.0
20.6
7.0
7.0
1486.
1274.
8.5
8.5
159.
159.
0.055
0.084
0.008
0.012
0.020
0.020
0.030
0.030
0.500
0.550
i
MAX
DEPTH
rtANGE
N«
0.0-
1.5-
0.0-
1.5-
0.0-
1.5-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
1.5
18.6
1.5
18.6
1.5
18.6
1.5
18.6
1.5
18.6
1.5
18.6
1.5
18.6
1.5
18.6
1.5
18.6
1.5
18.6
5
3
5
3
5
3
5
3
5
3
5
3
5
3
5
3
5
3
5
3
( 11/18/75 1
S»«* = 3
R.ANGF MEDIAN
12.2- 14.5
12.2- 14.2
6.0- 9.6
5.6- 9.6
975. -1039.
1039. -10«0.
8.3- 8.6
8.3- 8.6
150.- 163.
153.- 163.
0.064-0.083
0.064-0.154
0.008-0.031
0.014-0.023
0.020-0.060
0.020-0.050
0.020-0.060
0.020-0.060
0.300-0.400
0.400-0.400
13.9
13.6
7.2
7.4
1020.
1080.
8.4
8.4
157.
154.
0.072
0.079
0.021
0.021
0.040
0.040
0.020
0.020
0.400
0.400
I
MAX
DEPTH
RANGE
"(METERS)
0.0-
0.0-
0.0-
0.0-
0.6-
0.0-
0.0-
6.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
0.0-
1.5
15.8
1.5
15. S
1.5
15.8
1.5
15.8
1.5
15.8
1.5
15.8
1.5
15.8
l.S
15.8
1.5
15.8
1.5
15.8
1.2- 1.3
1.2
0.3- 0.4 0.4
0.2- 0.3 0.3
» N = NO. OF SAMPLFS
«« MAXIMUM DEPTH SAMPLED AT EACH SITE
°«* S = NO. OF SITES SAMPLED ON THIS DATE
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8
B. Biological Characteristics:
1. Phytoplankton -
Sampling
Date
03/04/75
06/18/75
11/18/75
Dominant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Ankistrodesmus
Cryptomonas
Dactylococcopsis
Kirchneriella
Chroomonas?
Other genera
Total
Lyngbya
Carter! a
Dactyl ococcopjsi s
Centric diatom
Ceratium
Other genera
Total
Chroomonas?
Dactylococcopsis
Euglena
Mesostigma
Chlamydomonas
Other genera
Total
Algal
Units
Per ml
2,045
1,402
584
467
380
1,256
6,134
2,463
1,351
530
424
265
1,191
6,224
6,312
207
89
59
59
327
7,053
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2. Chlorophyll a_ -
Sampling Station Chlorophyll a_
Date Number (ug/1)
03/04/75 01 7.7
02 9.6
03 14.9
04
06/18/75 01 7.4
02 16.2
03 33.2
04 21.1
11/18/75 01 8.6
02 14.3
03 14.5
04
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10
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked
a. 03/04/75
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0 N
1.00 N
b. 11/18/75
Ortho P
Cone, (mg/1)
0.010
0.060
0.060
0.010
Spike (mg/1)
Control
0.05 P
0.05 P + 1.0
1.00 N
Ortho P
Cone, (mg/1)
0.020
0.070
0.070
0.020
Inorganic N
Cone, (mg/1)
0.168
0.168
1.168
1.168
Inorganic N
Cone, (mg/1)
0.130
0.130
1.130
1.130
Maximum Yield
(mg/1-dry wt.)
0.4
7.0
15.0
0.4
Maximum Yield
(mg/1-dry wt.)
0.8
4.8
3.8
0.8
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11
2. Discussion -
The control yields of the assay algas Selenastrum capri-
cornutum*, indicate that the potential for primary production i.n
San Carlos Reservoir was moderate at the times of sampling
(03/04/75, 11/18/75). In both assays, the addition of phosphorus
alone produced a significant increase in yield over that of the
control, indicating phosphorus limitation. The addition of
nitrogen alone did not produce any growth repsonse over that of
the control.
The mean inorganic nitrogen to orthophosphorus ratios (N/P)
in the lake data were 11/1 or less on all three sampling occasions,
suggesting primary limitation by nitrogen in San Carlos Reservoir.
*For further information regarding the algal assay test procedure
and selection of test organisms, see U.S. EPA (1971).
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12
IV. NUTRIENT LOADINGS
(See Appendix D for data)
For the determination of nutrient loadings, the Arizona 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 month of May when three samples were collected. Sampling was
begun in December 1974, and v/as completed in November 1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided
by the Arizona 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 loads indicated for tributaries
are those measured minus known point source loads, if any.
Nutrient loadings for unsampled "minor tributaries and immediate
drainage" ("ZZ" of USGS) were estimated by using the mean annual
2
nutrient loads, in kg/km /year in the Gila River at Station A-2, and
2
multiplying the means by the ZZ area in km .
The operator of the San Carlos wastewater treatment plant pro-
vided monthly effluent samples and corresponding flow data. Nutrient
loads for the Soda Canyon Recreation Area wastewater treatment plant
were estimated at 1.134 kg P and 3.401 kg N/capita/year.
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A. Waste Sources:
1. Known municipal
Name
Soda Canyon
Recreation
Area
San Carlos 2,700
13
Pop.*
Served
200
Treatment*
Activated
Sludge
Mean Flow
(m3/d x 103)
0.076**
Receiving
Water
San Carlos River
Stabilization
Pond
0.616
San Carlos River
2. Known industrial - None
*Provided by the treatment plant operator.
**Estimated at 0.3785 m3/capita/day.
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14
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
% of
Source kg P/yr total
a. Tributaries (nonpoint load) -
A-2 Gila River 454,795 92.4
B-l San Carlos River 20,375 4.1
b. Minor tributaries and immediate
drainage (nonpoint load) - 14,325 2.9
c. Known municipal STP's -
Soda Canyon Recreation Area 225 0.1
San Carlos 1,340 0.3
d. Septic tanks - None known
e. Known industrial - None
f. Direct precipitation* - 920 0.2
Totals 491,980 100.0
2. Outputs - A-l Gila River 10,165
3. Net annual P accumulation - 481,815
*Estimated (See NES Working Paper No. 175).
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15
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
% of
Source kg N/yr total
a. Tributaries (nonpoint load) -
A-2 Gila River 927,960 86.2
B-l San Carlos River 58,780 5.5
b. Minor tributaries and immediate
drainage (nonpoint load) - 29,600 2.7
c. Known municipal STP's -
Soda Canyon Recreation Area 680 <0.1
San Carlos 3,000 0.3
d. Septic tanks - None known
e. Known industrial - None
f. Direct precipitation* - 56.800 5.3
Totals 1,076,820 100.0
2. Outputs - A-l Gila River 239,960
3. Net annual N accumulation - 836,860
*Estimated (See NES Working Paper No. 175).
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16
D. Mean Annual Nonpoint Nutrient Export by Subdrainage Area:
2 2
Tributary kg P/km /yr kg N/km /yr
A-2 Gila River 15 31
B-l San Carlos River 8 22
E. 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
waters 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 San Carlos Reservoir 9.35
Vollenweider's "eutrophic" loading 0.45
Vollenweider's "oligotrophic" loading 0.22
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17
V. LITERATURE REVIEWED
Rathbun, Ned L. 1974. Personal Communication (lake morphometry).
Arizona Game and Fish Department, Phoenix, Arizona.
Shafer, W. H. 1977. Personal Communication (fluctuating lake
levels). Arizona Department of Health Services, Phoenix, Arizona.
U.S. Environmental Protection Agency. 1971. Algal Assay Procedure
Bottle Test. National Eutrophication Research Program, Corvallis,
Oregon.
U.S. Environmental Protection Agency. 1975. National Eutrophi-
cation Survey Methods 1973-1976. Working Paper No. 175. National
Environmental Research Center, Las Vegas, Nevada, and Pacific
Northwest Environmental Research Laboratory, Corvallis, Oregon.
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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18
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 10~4 = 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 = Ibs/square mile
-------
APPENDIX B
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLO* INFORMATION FOR ARIZONA
LAKE CODE 0411 SAN CARLOS
TOTAL DRAINAGE AKEA OF LAKE(SO KM) 33374.7
11/26/76
SUB-DRAINAGE
TRIBUTARY AREA(S3 KM)
JAN
FEB
MAk
APR
MAY
NORMALIZED FLOWS(CMS)
JUN JUL AUG
SEH
OCT
NOV
DEC
MEAN
0411A1
0411A2
041161
041UZ
33374.7
29707.3
2659.9
1007.5
MEAN MONTHLY FLOHS
TRIBUTARY MONTn YEAK
0411A1
0411A2
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
11
74
75
75
75
75
75
75
75
75
75
75
75
74
76
75
75
7b
75
75
75
75
75
7b
75
1.42 5.66 11.33
14.16 16.99 19.82
1.699 2.832 2.407
0.566 0.850 0.850
TOTAL DRAINAGE AREA uF
11.33 12.46 14.72 16.99 12.74 9.06 2.55 1.42 4.25
12.74 7.93 1.42 1.42 8.50 5.10 15.86 4.53 12.74
0.566 0.227 0.057 0.425 1.133 0.566 2.265 0.425 6.796
0.227 0.085 0.028 0.170 0.425 0.227 O.BbO 0.142 1.699
SUMMARY
LAKE = 33374.7 TOTAL FLOW IN = 146.71
8.68
10.09
1.620
0.511
SUM OF SUB-DRAINAGt AnEAS = 33374.7 TOTAL FLOW OUT = 103.92
AND DAILY FLOWS(CMS)
MEAN FLOW DAY
7.985 8
7.787 11
11.893 15
19.340 15
13.819 12
19.878 1
20.898 14
16.339 10
19.086 7
14.895 16
7.108 18
0.117 10
1.631 8
1.130 11
5.380 15
13.366 IS
12.743 12
3.228 1
0.547 14
1.073 10
0.208 7
47.601 16
4.899 IB
3.964 10
FLOW DAY FLOW DAY FLOW
6.768 8 7.079
6.513
11.327
20.388
10.024
19.425 0 0.0
23.078
19.737
19.624
14.866
7.985
0.091
1.331
0.991
3.256
22.710
15.291
8.60B 0 0.0
0.538
0.122
0.122
70.792
2.917
3.908
-------
TRIBUTARY FLO* INFORMATION FOR AKIZONA
11/26/76
LAKE CODE 0*11
SAN CAWLOS
MEAN MONTHLY FLO«S AND DAILY FLOWS
-------
APPENDIX C
PHYSICAL AND CHEMICAL DATA
-------
bTORET rtETRIEVAL DATE 76/11/26
MAIL tUTHOf»hICATION SURVEY
VEGAS
00010
00300
DATE
FKOM
TO
75/03/0*
75/06/18
75/11/18
TIME DEPTH »
OF
DAY FEET
10
10
10
10
10
10
11
11
11
11
11
09
09
09
09
09
35
35
35
35
35
35
25
25
25
25
25
45
45
45
45
45
0000
0005
0020
0040
0055
0070
0000
0005
0015
0035
0061
0000
0005
0015
0030
0052
lATEK
TEMP
CENT
n
11
9
a
8
8
18
18
18
17
15
1*
14
1*
14
14
.4
.3
.1
.7
.6
.9
.4
.3
.3
.7
.3
.4
.5
.5
.4
.2
00
MG/L
10
10
7
7
5
3
8
3
3
2
0
6
6
6
5
5
.2
.4
.6
.4
.2
.8
.6
.6
.8
.2
.4
.4
.0
.0
.8
.6
041101
33 10 33.0 lit) 31 38.0 3
SAN CARLOS RESEKVOIS
04007 ARIZONA
110491
11EPALES
00077
THANSP
SLCCHI
INCHES
51
11
00094
CNDUCTVY
FIELD
MICKOMHO
1305
1261
1287
1248
1287
1479
1220
1217
1216
1195
1051
991
1020
1041
1071
1080
0074
00400
PH
SU
8.40
8.40
8.10
6.00
7.90
7.80
7.90
7.90
7.85
7.80
7.75
8.25
8.30
8.30
8.30
8.30
2111202
FEET DEPTH CLASS
00*10
T ALK
CAC03
MG/L
172
170
167
168
167
17*
159
160
159
159
166
150
151
150
155
153
00610
NH3-N
TOTAL
MG/L
0.040
0.020
0.030
0.020
0.030
0.120
0.030
0.030
0.020
0.030
0.080
0.060
0.060
0.060
0.080
0.060
00
00625
TOT KJtL
N
MG/L
1.600
0.400
0.600
0.400
0.400
0.600
0.500
0.400
0.400
0.400
0.500
0.400
0.400
0.400
0.400
0.400
00630 00671
M02&N03 PrtOS-UlS
N-TOTAL OHTlO
Mfa/L MG/L P
0.060
0.0*0
0.100
U.130
0.190
0.100
0.020K
0.020K
0.020K
0.020K
0.030
0.060
0.060
0.060
0.040
0.050
0.007
0.004
0.005
0.009
o.oos
O.Clll
0.007
0.007
O.OOo
0.016
0.0**
0.016
0.031
O.S28
0.025
0.021
DATE
TO
75/UJ/04
75/06/18
75/11/18
00665 32217 00031
TIME DEPTH PHOS-TOT CHLHPHYL INCDT LT
OF A kEMNlNG
DAY FEET
10
10
10
10
10
10
11
11
11
11
11
09
09
09
09
09
35
35
35
35
35
35
25
25
25
25
25
45
45
45
45
45
0000
0005
0020
0040
0055
0070
0000
0005
0015
0035
0061
0000
0005
0015
0030
0052
HG/L P
0.025
0.024
0.273
0.021
0.022
0.171
0.039
0.038
0.039
0.043
0.110
0.080
0.083
0.077
0.0*4
0.15*
UG/L PEHCENT
7.7
7.4
8.6
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/11/26
NATL tUTROPnlCATION SUKVtY
EPA-LAS VEGAS
OATE
TO
75/03/04
75/06/19
75/11/18
00010
TIME DEPTH rfATtn
OF TtMP
DAY FEET
11
11
11
11
13
13
13
13
09
09
09
35
35
35
35
25
25
25
25
25
25
25
0000
0005
0015
0024
0000
0005
0015
0024
0000
0005
0014
CENT
12.2
11.6
9.9
6.9
24.3
24.2
21.9
20.6
13.9
13.6
13.6
00300 00077 Q0094
oo TRANSP CNOUCTVY
SECCMI FIELD
MG/L INCHES MICROMHO
10.2
11.2
6.8
9.2
7.4
6.2
5.2
7.4
8.4
7.2
7.4
48
17
12
1272
1277
1282
1490
1485
1406
1274
975
1026
1080
041102
33 11 25.0 110 25 47.0 3
»AN CARLOS RESERVOIR
04007 ARIZONA
1104*1
11EHALES
211
002a FEET DEHTH CLASS
00400
PH
su
8.20
8.65
8.00
8.50
8.«»5
8.10
8.50
ft. 50
8.40
6.40
00410
T ALK
CAC03
MG/L
166
166
167
167
160
158
158
159
163
157
154
00610
NH3-N
TOTAL
M(i/L
0.030
0.020
0.020
0.030
0.030
0.040
0.040
0.030
0.020
0.020
0.020
1202
00
0062b
TOT KJtL
N
MG/L
0.000
0.400
0.400
0.600
0.600
0.400
0.400
0.500
0.400
0.300
0.400
00630
N02&N03
N-TOTAL
MG/L
0.020*
0.020K
0.080
0.080
0.020K
0.020K
0.020K
0.020K
0.020
0.040
0.040
00^71
PMOS-DIb
0*TnO
MS/L P
0.017
0.009
0.005
0.007
0.008
0.013
0.014
0.011
0.008
0.021
0.014
00665 32217
DATE TIME DEPTH PHOS-TOT CHLHPHYL
FROM OF A
TO DAY FEET MG/L P UG/L
75/03/04 11 33 0000 0.026 9.6
11 35 0005 0.028
11 35 0015 0.018
11 35 0024 0.036
75/06/19 13 25 0000 0.053 16.2
13 25 0005 0.055
13 25 0015 0.040
13 25 0024 0.058
75/11/18 09 25 0000 0.072 14.3
09 25 0005 0.066
09 25 0014 0.079
00031
INCUT Lf
REMNING
PERCENT
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/11/26
NATL EUTROPHICATION SUKVEY
tPA-LAS VEGAS
041103
33 11 40.0 110 24 £5.0 3
SAN CARLOS
04007 AH1ZONA
110491
11EHALES
211U02
0020 FEET DEPTH CLASS
DATE
FwOM
TO
75/03/04
7b/06/19
/b/11/18
0«TE
FROM
TO
75/03/04
75/06/19
75/11/18
TIME DEPTH
OF
DAY FEET
12 lb 0000
12 15 0005
12 15 0010
12 15 0016
13 05 0000
13 05 0005
09 10 0000
TIME DEPTH
OF
DAY FEET
12 15 0000
12 15 0005
12 15 0010
12 15 0016
13 05 0000
13 05 0005
09 10 0000
00010
wATEH
TEMP
CENT
13.0
12.5
12.0
12.0
24.1
24.0
12.2
00665
PHOS-TOT
MG/L P
0.021
0.030
0.142
0.144
0.107
0.056
0.064
00300
DO
MG/L
12.8
13.2
10. B
9.6
7.0
7.0
9.6
32217
CHLRPHYL
A
UG/L
14.9
33.2
14.5
00077
TKANbP
StCCHI
INCHES
46
11
6
OOOJ1
INCDT LT
REMNING
PERCENT
00094
CNDUCTVY
FIELD
MICROMHO
1258
1232
1668
1983
1546
1547
1039
00400
PH
Su
7.95
8.75
8.40
8.15
8.55
8.55
8.60
00410
T ALK
CAC03
MG/L
167
166
171
171
161
159
163
00610
NM3-N
TOTAL
M6/L
0.030
0.030
0.030
0.030
0.050
0.030
0.020
00
0062b
TOT KJtL
N
MG/L
0.500
0.600
0.600
0.600
0.500
0.600
0.400
00630
N02&N03
N-TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
O.Oi'OK
0.020K
00o71
PnOS-DIS
OIThO
M6/L P
0.005
0.006
0.007
0.007
0.019
0.014
0.023
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOrtET RETRIEVAL DATE 7fe/ii/2fc
NATL EUTROPMKATION SURVEY
fcPA-LAS VEGAS
041104
33 II 54.0 110 2* 86.0 3
SAN CAiRLOH HESEHVOIH
0*009 ARIZONA
00010
DATE TIME DEPTh *ATtH
FROM OF TtMP
TO DAY FEE! CENT
75/06/18 11 00 0000
00300 00077 00094
00 THANSP CUDUCTVY
StCCnl FIELD
MG/L INCHES MICKOMHU
lltPALES 760109 211120?
OV99 FEET DEPTH CLASS 00
00400 00410 00610
PH T ALK NH3-N
CAC03 TOTAL
su MG/L MG/L
b.bO
a, 020
00625
TOT KJEL
N
MO/L
0.800
00630
N-rOTAL
OOc.71
PHOS-OIS
0.020
H
0.007
00665 32217 00031
DATE TIME DEPTH PHOS-TOT CHLKPHYL INCUT LT
FHOM OF A SEMNING
TO DAY FEET MG/L P UG/L PEKCENT
75/06/18 11 00 0000
0.118
-------
APPENDIX D
TRIBUTARY AND WASTEWATER
TREATMENT PLANT DATA
-------
STORET RETRIEVAL DATE 76/11/30
NATL EUTROPHICATION SURVEY
EPA- LAS VEGAS
DATE TIME DEPTH NO.efc.N03
FROM OF
TO DAY FEET
74/12/08
75/01/11
75/02/15
75/03/15
75/04/12
75/05/01
75/05/07
75/05/30
75/06/14
75/07/10
75/08/07
75/09/16
75/10/18
75/11/10
12 30
13 3b
10 50
11 00
16 00
12 15
11 10
16 30
07 20
11 30
09 30
10 30
11 48
04HA1
33 10 10.0 110 31 50.0 4
GILA RIVE*
04 7.b COULIOGE DAM
0/SAN CARLOS RESEKVOIH 110491
UNMPRVD RO XIN& .5 M DHNaTHM COOLIDGE OM
11EPALE5 2111204
0000 FEET OE^Th CLASS 00
Oe>30
fc.N03
OTAL
C./L
0.016
0.024
0.070
0.112
0.035
0.115
0.115
0.045
0.005
0.005
0.005
0.420
0.090
0.155
00625
TOT KJEL
N
MG/L
0.600
1.300
0.600
1.000
0.600
2.100
0.300
0.400
0.900
1.050
0.700
0.600
3.500
00610
NH3-N
TOTAL
MG/L
0.060
0.168
0.104
0.028
0.063
0.025
0.060
0.055
0.135
0.250
0.470
0.095
0.070
0.120
00671
PHOS-OIS
ORTHO
MG/L P
0.010
0.010
0.016
0.008
0.010
0.005K
O.Olb
0.035
0.055
0.090
0.090
0.100
0.035
0.130
00665
PHOS-TOT
MG/L f1
0.040
0.020
0.030
0.070
0.020
0.050
0.030
0.040
0.070
0.120
0.130
0.170
0.100
0.750
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOHET RETRIEVAL 0«TE 76/11/30
NATL EUTROPHICAYION SURVEY
EPA- LAS VEGAS
DATE TIME DEPTH N026.N03
FROM OF
TO DAY FEET
74/i2/oe
75/01/11
75/02/15
75/03/15
75/0*/12
75/05/01
75/05/07
75/05/30
75/06/14
75/07/10
75/08/07
75/09/16
75/10/18
75/11/10
11
11
11
11
10
15
12
10
1*
07
11
09
11
11
50
15
15
00
25
45
00
55
30
10
50
45
00
25
0411A2
33 10 00.0 110 OH 05.0 4
GILA RIVER
04 15 dYLAS
T/SAN CARLOS RESERVOIR
HHY 70 8RUG 2 MI NN* OF bYLAS
11EPALES 2111204
0000 FEET OEf-TH CLASS 00
0630
&N03
OTAL
G/L
1.600
1.600
1.450
0.507
0.760
0.810
1.350
1.500
0.460
0.39Q
0.005
0.290
0.830
0.710
0062 =
TOT KJEL
N
MG/L
0.300
1.600
0.600
3.700
2.800
0.900
1.000
0.250
0.900
0.750
0.6bO
0.300
0.800
00610
NM3-N
TOTAL
MG/L
0.020
0.040
0.016
0.152
0.120
0.020
0.110
0.030
0.070
0.050
0.030
0.025
0.015
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.065
0.005K
0.120
0.104
0.095
0.070
0.090
0.010
0.010
0.015
0.015
0.135
0.070
0.065
00665
PHOS-TOT
MG/L P
0.080
0.010
0.440
0.960
0.500
0.29u
0.010
0.020
0.020
0.070
0.120
0.140
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STORET KETrtlEVAL DATE. 76/11/30
NATL EUTRGPhlCATION SURvtY
EPA- LAS VtGAS
DATE TIME DEPTH
FHOM OF
TO DAY FEET
74/12/Oh
75/01/11
75/U2/15
75/03/15
75/04/12
75/05/01
75/05/07
75/05/30
75/06/14
75/07/10
75/OH/07
75/09/16
75/10/18
75/11/10
11
10
11
10
10
15
12
10
14
18
12
11
10
11
05
40
35
45
10
30
30
31
10
50
15
30
45
03
0411B1
33 19 20.0 110 26 48.0 4
SAN CARLOS RIVER
0* 7.5 SAN CARLOS
T/SAN CAHLOS fctSEKVOIR
SEC KD BHUd 2.4 Ml S OF SAw CARLOS
11EPALES 311120*
0000 FEET DEPTh CLASS 00
0630
t»N03
OTAL
IG/L
0.216
0.200
0.115
0.064
0.055
0.025
0.050
0.135
0.160
0.030
0.005
0.030
0.025
0.010
00625
TOT KJ£L
N
MG/L
0.500
1.400
0.300
0.900
2.600
1.450
1.15G
0.175
0.350
0.450
2.850
1.200
0.600
0.800
00610
Nrt3-lM
TOTAL
Mii/L
0.015
0.400
0.040
0.028
0.040
0.035
0.045
0.015
0.020
0.020
0.030
0.015
0.015
0.005K
00671
Pt-iOS-OIS
ORTMO
MG/L P
0.135
0.125
0.120
0.136
0.160
0.100
0.110
0.100
0.080
0.140
0.185
0.190
0.240
0.190
00665
PHOS-TOT
MCi/L P
0.170
0.150
0.150
0.660
1.100
0.180
0.120
0.100
0.080
0.152
0.230
0.380
0.270
0.220
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STOKtT RETRIEVAL UATE 76/11/30
NATL EUTROPrllCATION SURVEY
EPA- LAS VEGAS
UATE TIME DEPT>
FROM OF
TO DAY FEET
75/05/13 Ob 00
75/12/08 00 00
0411DA AS04110A H000200
33 20 45.0 110 27 00.0 4
SODA CANYON REC AREA
04 7.5 SAN CARLOS
T/SAN CARLOS LAKfc 110491
SODA CANYON
UEPALtS 2141204
0000 FEET DEPTH CLASS 00
00630
i2«,N03
TOTAL
M(3/L
27.000
19.800
00625
TOT KJEL
N
MG/L
5.600
2.500
00610
NH3-N
TOTAL
MG/L
0.069
0.025K
00671
PHOS-iHS
ORThO
MG/L P
9.UOO
4.400
00665
PMOS-TOT
MG/L P
10.500
5.900
500bl
FLOW
HATE
INST MGO
b0053
CONDUIT
FLOW-MGD
MONTHLY
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
STORET RETRIEVAL OATE 76/11/30
NATL EUTROPrtlCATION SURVEY
EPA- LAS VEGAS
OATE TIME DEPTH N02\N03
FrlOM OP
TO DAr FEET
75/05/02
75/06/05
75/07/08
75/08/04
75/09/03
75/10/02
75/11/Ob
75/12/04
76/01/07
76/02/09
76/03/01
76/04/02
76/05/13
13
14
12
11
13
14
13
13
10
15
13
08
13
00
00
fO
00
00
20
00
00
00
40
00
15
20
0411XA PD0411XA
33 21 00.0 110 27 00.0 4
SAN CARLOS
04 7.5 SAN CAKLOS
T/SAN CAKLOS LAKi
SEVEN MILE HASH
11EPALES 2141204
0000 FEET OEHTri CLASS 00
P002700
0630
\N03
OTAL
G/L
0.200
0.050
0.100
0.250
0.400
0.800
1.800
0.200
U.375
0.300
0.195
0.175
00625
TOT KJEL
N
MG/L
15.500
9.600
6.750
9.025
8.700
7.100
10.000
17.000
23.000
15.000
18.000
20.000
11.500
00610
NH3-N
TOTAL
MG/L
0.400
0.025
0.050K
0.120
0.02bK
0.091
1.200
1.150
0.130
8.500
3.130
00671
PHOS-&IS
ORTHO
MG/L P
4.600
3.700
3.600
3.400
4.050
*.050
4.800
5.200
0.1HO
5.300
4.200
6.750
00665
PHOS-TOT
MG/L P
7.000
4.600
4.100
4.000
4.800
4.800
6.000
7.800
7.400
7.100
6.800
7.500
6.000
50051
FLOW
RATt
INST MGU
0.790
0.165
0.170
0.160
0.155
0.170
0.165
0.170
0.170
50053
CONDUIT
FLOtf-MGU
MONTHLY
0.179
0.160
0.165
0.155
0.165
0.160
0.160
0.160
0.160
K VALUE KNOWN TO BE LESS
THAN INDICATED
-------
APPENDIX E
PARAMETRIC RANKINGS OF LAKES
SAMPLED BY NES IN 1975
STATE OF ARIZONA
Mean or median values for six of the key parameters evaluated
in establishing the trophic conditions of Arizona 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 1n mg/1. Chlorophyll a^ values are expressed 1n yg/1.
To maintain consistent rank order with the preceding parameters,
the mean Secchi disc depth, 1n Inches, 1s subtracted from 500.
Similarly, minimum dissolved oxygen values are subtracted from 15
to create table entries.
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LAKE DATA TO BE USED IN RANKINGS
LAKE
CODE LAKE NAME
0401 BIG LAKE
0402 FOULS HOLLOW
0403 LAKE HAVASU
0404 LUNA LAKE
0405 LYHAN LAKE
0406 LAKE MOHAVE
0407 LAKE PLEASANT
0408 LAKE POWELL
0409 RAINBOW LAKE
0410 ROOSEVELT LAKE
0411 SAN CARLOS RESERVOIR
3201 LAKE HEAD
MEDIAN
TOTAL P
0.032
0.059
0.015
6.182
0.099
6.017
0.027
0.009
0.046
0.020
0.056
0.020
MEDIAN
INORG N
0.090
0.090
0.170
0.050
0.060
0.240
0.040
0.400
0.045
0.040
0.060
0.505
500-
MEAN SEC
386.000
466.600
420.231
396.250
484.667
369.667
449.154
239.000
440.750
429.917
474.500
453.600
MEAN
CHLORA
2.900
10.683
3.948
3.400
2.633
4.404
9.808
1.333
16.367
4.073
14.750
1.150
15-
MIN DO
9.000
14.800
10.800
12.200
9.000
8.600
14.900
12.200
12.000
14.000
14.600
8.000
MED I
DISS ORT
0.007
0.014
0.005
0.131
0.056
0.010
0.004
0.010
0.009
0.008
0.009
0.007
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PERCENT OF LAKES WITH HIGHER VALUES (NUMBER OF LAKES WITH HIGHER VALUES)
LAKE
CODE LAKE NAME
0401 BIG LAKE
0402 FOOLS HOLLOW
0403 LAKE HAVASU
0404 LUNA LAKE
0405 LYHAN LAKE
0406 LAKE HOHAVE
0407 LAKE PLEASANT
0408 LAKE POWELL
0409 RAIN80W LAKE
0416 ROOSEVELT LAKE
0411 SAN CARLOS RESERVOIR
3201 LAKE MEAD
MEDIAN
TOTAL P
45 (
is i
91 1
0 1
9 <
82 1
55 1
100 (
36 (
68 1
27 1
68 1
[ 5)
t 2)
I 10)
I 0)
I 1)
., . x* ,
I 9)
[ 6)
I 11)
[ 4)
I 7)
E 3)
I 7)
MEDIAN
INORG N
41
41
27
73
64
18
95
9
82
95
55
0
( 4)
( 4)
( 3)
( 8)
( 7)
( 2)
( 10)
( 1)
( 9)
( 10)
( 6)
( 0)
500-
MEAN SEC
82 1
18 1
64 1
73 (
0 (
91 <
36 (
100 1
45 (
55 (
9 1
27 (
[ 9)
[ 2)
I 7)
[ 8)
[ 0)
[ 10)
; 4)
i ID
: 5)
! 6)
: i)
: 3)
MEAN
CHLORA
73 1
18 1
55 1
64 !
82 1
36 <
27 1
91 1
0 <
45 1
9 1
100 <
[ 8)
E 2)
[ 6)
[ 7)
[ 9)
I 4)
E 3)
[ 10)
I 0)
[ 5)
: i)
[ ID
15-
MIN 00
77 1
9 I
64 !
41 1
77 1
91 (
0 <
41 1
55 1
27 (
18 1
100 1
[ 8)
[ 1)
[ 7)
[ 4)
[ 8)
( 10)
[ 0)
[ 4)
[ 6)
[ 3)
[ 2)
I 11)
MEDIAN .
DISS OKTHO P
73 1
18 1
91 1
0 (
9 1
32 (
100 1
32 I
45 1
64 1
55 <
82 1
[ 8)
[ 2)
[ 10)
[ 0)
[ 1)
: 3)
! 11)
1 3)
E 5)
[ 7)
[ 6)
1 9)
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