U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
NICASIO RESERVOIR
MARIN COUNTY
CALIFORNIA
EPA REGION IX
WORKING PAPER No, 753
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
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REPORT
ON
NICASIO RESERVOIR
MARIN COUNTY
CALIFORNIA
EPA REGION IX
WORKING PAPER No, 753
WITH THE COOPERATION OF THE
CALIFORNIA STATE WATER RESOURCES CONTROL BOARD
AND THE
CALIFORNIA NATIONAL GUARD
FEBRUARY., 1978
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i
CONTENTS
Page
Foreword i i
List of California 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 5
IV. Nutrient Loadings 9
V. Literature Reviewed 13
VI. Appendices 14
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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, concentrations,
and impact on selected freshwater lakes as a basis for formulating
comprehensive and coordinated national, regional, and state management
practices relating to point-source discharge reduction and non-point
source pollution abatement-in lake watersheds.
ANALYTIC APPROACH
The mathematical and statistical procedures selected for the
Survey's eutrophication analysis are based on related concepts that:
a. A generalized representation or model relating
sources, concentrations, and impacts can be constructed.
b. By applying measurements of relevant parameters
associated with lake degradation, the generalized model
can be transformed into an operational representation of
a lake, its drainage basin, and related nutrients.
c. With such a transformation, an assessment of the
potential for eutrophication control can be made.
LAKE ANALYSIS
In this report, the first stage of evaluation of lake and water-
shed data collected from the study lake and its drainage basin is
documented. The report is formatted to provide state environmental
agencies with specific information for basin planning [§303(e)], water
quality criteria/standards review- [§303(c)], clean lakes [§314(a,b)],
and water quality monitoring [§106 and §305(b)] activities mandated
by the Federal Water Pollution Control Act Amendments of 1972.
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iii
Beyond the single lake analysis, broader based correlations
between nutrient concentration (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
fresh water 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.
ACKNOWLEDGEMENT
The staff of the National Eutrophication Survey (Office of
Research & Development, U.S. Environmental Protection Agency)
expresses sincere appreciation to the California State Water
Resources Control Board and the nine Regional Water Quality
Control Boards for professional involvement, to the California
National Guard for conducting the tributary sampling phase of
the Survey, and to those California wastewater treatment plant
operators who voluntarily provided effluent samples and flow
data.
The staff of the Division of Planning and Research of the
State Water Resources Control Board provided invaluable lake
documentation and counsel during the Survey, coordinated the
reviews of the preliminary reports, and provided critiques
most useful in the preparation of this Working Paper series.
Major General Glen C. Ames, the Adjutant General of Cali-
fornia, and Project. Officer Second Lieutenant Terry L. Barrie,
who directed the volunteer efforts of the California National
Guardsmen, are also gratefully acknowledged for their assistance
to the Survey.
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IV
NATIONAL EUTROPHICATION SURVEY
STUDY RESERVOIRS
State of California
Name
Amador
Boca
Britton
Casitas
Crow!ey
Don Pedro
Elsinore
Fallen Leaf
Hennessey
Henshav/
Iron Gate
Lopez
Mary
Mendocino
Nicasio
Lower Otay
Pillsbury
Santa Margarita
Shasta
Shaver
Silver
Tahoe
Tulloch
Lower Twin
Upper Twin
County
Amador
Nevada
Shasta
Ventura
Mono
Tuolumne
Riverside
El Dorado
Napa
San Diego
Siskiyou
San Luis Obispo
Mono
Mendocino
Marin
San Diego
Lake
San Luis Obispo
Shasta
Fresno
Mono
El Dorado, Placer, CA;
Carson City, Douglas,
Washoe, NV
Calaveras, Tuolumne
Mono
Mono
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NICASIO RESERVOIR
Tributary Sampling Site
X Lake Sampling Site
Drainage Area Boundary
01234 5Km.
NICASIO
RESERVOIR
3806—
3802
12246
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NICASIO RESERVOIR
STORE! NO. 0617
I. CONCLUSIONS
A. Trophic Condition*:
Survey data indicate that Nicasio Reservoir is eutrophic.
It ranked seventeenth in overall trophic quality among the
24 California lakes and reservoirs sampled in 1975 when compared
using a combination of six water quality parameters**. Seven-
teen of the water bodies had less median total phosphorus, 12
had less and one had the same median dissolved orthophosphorus,
21 had less median inorganic nitrogen, 16 had less mean chloro-
phyll £, and 22 had greater mean Secchi disc transparency. No
significant depression of dissolved oxygen occurred at any of
the three stations during Survey sampling; however, artificial
aeration has been used in the reservoir (Bailey, 1977).
Survey limnologists noted much suspended sediment during
the sampling, and Secchi disc transparencies ranged from 0.3
to 0.6 meters. It is reported that phytoplankton and fish
kills are problems in this water body (Johns, 1975), and copper
sulfate has been applied for control of algae (Bailey, op. cit.).
B. Rate-Limiting Nutrient:
The algal assay results are not considered representative
of conditions in the reservoir at the times the samples were
taken due to significant changes in nutrients during shipment
from the field to the laboratory. The reservoir data indicate
* Trophic assessment is based on the levels of nutrients, dissolved oxygen,
and chlorophyll
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2
nitrogen limitation in March and November but phosphorus limi-
tation in June. However, because of turbidity, primary produc-
tivity in the reservoir may be light-limited at times rather than
nutrient-limited.
C. Nutrient Controllability:
1. Point sources--No known point sources impacted Nicasio
Reservoir during the sampling year.
The sampling year phosphorus loading of 0.60 g/m2 is a little
less than that proposed by Vollenweider (Vollenweider and Dillon,
1974) as a eutrophic loading (see page 12). However, there was
an apparent phosphorus loss during the sampling year which may
have been due to underestimation of phosphorus input from the
minor tributaries and immediate drainage (see below). Because
of this, the calculated phosphorus loading probably is too low;
e.g., if the total of the phosphorus inputs was a least equal to
the amount leaving the reservoir, the area! loading would be
0.75 g/m2/yr.
2. Non-point sources--Non-point sources accounted for all
of the total phosphorus load during the sampling year.
Nicasio Creek contributed 32.9%, Halleck Creek contributed 23.1%,
and the ungaged minor tributaries and immediate drainage were
estimated to have contributed 41.1% of the total.
Survey geographers indicate that much of the land (50%)
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3
around the reservoir is cleared unproductive or rangeland.
In addition, much of the terrain is steeply sloped. An
additional investigation is needed to determine if both
nutrient and sediment loads can be reduced by land-conser-
vation measures.
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II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphometry :
1. Surface area: 3.42 kilometers2.
2. Mean depth: 8.1 meters.
3. Maximum depth: 35.1 meters.
4. Volume: 27.754 x 106 m3.
5. Mean hydraulic retention time: 256 days Cbased on outflow)
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Name
Nicasio Creek
Halleck Creek
Minor tributaries &
immediate drainage -
Drainage
area (km2)*
31.3
22.5
36.0
Totals 89.8
2. Outlet -
Nicasio Creek 93.2**
C. Precipitation***:
1. Year of sampling: 49.9 centimeters.
2. Mean annual: 49.6 centimeters.
Mean flow
(m3/sec)*
0.456
0.328
0.569
1.353
1.254**
t Table of metric conversions—Appendix B.
tt Dendy, 1974.
* For limits of accuracy, see Working Paper No. 175, "...Survey Methods,
1973-1976".
** Includes area of reservoir; lesser outflow due to evaporation.
*** See Working Paper No. 175.
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5
III. WATER QUALITY SUMMARY
Nicasio 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 collected
from a number of depths at three stations on the reservoir (see map,
page v). During each visit, a single depth-integrated (4.6 m or
near bottom to surface) sample was composited from the stations for
phytoplankton identification and enumeration; and during the first
and 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 24.4 meters at station
1, 8.5 meters at station 2, and 9.8 meters at station 3.
The sampling results are presented in full in Appendix D and are
summarized in the following table.
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PARAMETER
TEMP (C)
DISS OXY (MG/L)
CNOCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/U)
TOT P (MG/L)
ORTHO P (MG/L)
N02+N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/L)
CHLRPYL A (UG/L)
SECCHI (METERS)
A. SUMMARY OF PHYSICAL AND
1ST SAMPLING ( 3/13/75)
3 SITES
RANGE MEAN MEDIAN
9.6 - 11.7 11.1 11.2
7.6 - 11.0 9.1 9.2
112. - 121. 114. 114.
7.5 - 7.8 7.6 7.6
57. - 68. 62. 61.
0.068 - 0.123 0.093 0.096
0.034 - 0.058 0.048 0.048
0.440 - 0.560 0.517 0.520
0.030 - 0.060 0.041 0.040
0.300 - 0.800. 0.493 0.500
0.500 - 0.600 0.558 0.560
0.850 - 1.300 1.011 0.960
2.0 - 6.4 4.1 3.8
0.3 - 0.3 0.3 0.3
CHEMICAL CHARACTERISTICS FOR NICASIO RESERVOIR
STORET CODE 0617
2ND SAMPLING ( 6/26/75)
3 SITES
RANGE
15.3 - 18.9
5.2 - 10.4
135. - 155.
7.5 - 8.1
63. - 70.
0.038 - 0.088
0.006 - 0.014
0.110 - 0.350
0.040 - 0.100
0.200 - 0.500
0.160 - 0.400
0.410 - 0.820
4.2 - 7.1
0.6 - 0.6
MEAN MEDIAN
16.6 16.2
7.1 7.0
142. 140.
7.8 7.7
68. 68.
0.053 0.048
0.011 0.011
0.236 0.235
0.054 0.050
0.386 0.400
0.290 0.305
0.622 0.575
6.1 6.9
0.6 0.6
3RD SAMPLING (11/11/75)
3 SITES
RANGE MEAN MEDIAN
14.9 - 16.0 15.5 15.6
8.2 - 9.2 8.7 8.6
165. - 171. 169. 169.
7.7 - 8.1 7.8 7.8
60. - 75. 69. 70.
0.036 - 0.059 0.048 0.049
0.008 - 0.014 0.010 0.010
0.020 - 0.040 0.028 0.020
0.020 - 0.030 0.021 0.020
0.200 - 0.600 0.318 0.300
0.040 - 0.060 0.049 0.050
0.240 - 0.620 0.346 0.320
6.6 - 14.0 9.8 8.7
0.4 - 0.5 0.4 0.4
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
03/13/75
03/26/75
11/11/75
2. Chlorophyll a^ -
Sampling
Date
03/13/75
06/26/75
11/11/75
Dominant
Genera
1. Cryptomonas sp.
2. Chroomonas (7) s_p_.
3. Stephanodiscus sp.
Total
1. Stephanodiscus sp.
2. Chroomonas C?) sp.
3. Aphanizomenon sp.
4. Crucigenia sp.
5. Aphanocapsa sp.
Other genera
Total
1. Cryptomonas sp.
2. Pediastrum sp.
3. Asterionella sp.
4. Pediastrum sp.
5. Melosira sp.
Other genera
Total
Station
Number
1
2
3
1
2
3
1
2
3
Algal Units
per ml
362
226
90
678
3,156
298
149
124
99
250
4,076
297
132
99
99
66
99
792
Chlorophyll a_
(yg/D
2.0
3.8
6.4
4.2
7.1
6.9
8.7
14.0
6.6
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8
C. Limiting Nutrient Study:
Due to significant changes in the nutrients in the samples
during shipment from the field to the laboratory, the algal
assay results are not considered representative of conditions
in the reservoir at the times the samples were collected
(03/13/75 and 11/11/75).
The reservoir data indicate nitrogen limitation in March
and November but phosphorus limitation in June; i.e., the
mean inorganic nitrogen/orthophosphorus ratios were 12/1 or
less at all stations in March and November but 24/1 or greater
at all stations in June.
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IV. NUTRIENT LOADINGS
(See Appendix E for data)
For the determination of nutrient loadings, the California 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 February, March, and April when two samples were col-
lected. Sampling was begun in November, 1974, and was completed in
October, 1975.
Through an interagency agreement, stream flow estimates for the
year of sampling and a "normalized" or average year were provided by
the California District Office of the U.S. Geological Survey for the
tributary sites nearest the reservoir.
In this report, nutrient loads for sampled tributaries were cal-
culated using mean annual concentrations and mean annual flows. Nutri-
ent loads for unsampled "minor tributaries and immediate drainage"
("ZZ" of U.S.G.S.) were estimated using the mean concentrations in
Nicasio and Hal leek creeks at stations A-2 and B-l and the mean annual
ZZ flow.
No known wastewater treatment plants impacted the reservoir during
the sampling year.
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10
A. Waste Sources:
1. Known municipal - None
2. Known industrial - None
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total
a. Tributaries (non-point load) -
Nicasio Creek 675 32.9
Hal leek Creek 475 23.1
b. Minor tributaries & immediate
drainage (non-point load) - 845 41.1
c. Known municipal STP's - None
d. Septic tanks - Unknown ?
e. Known industrial - None
f. Direct precipitation* - 60 2.9
Total 2,055 100.0
2. Outputs -
Reservoir outlet - Nicasio
Creek 2,575
3. Net annual P loss - 520 kg.
* See Working Paper No. 175.
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11
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source y_r total
a. Tributaries (non-point load) -
Nicasio Creek 21,195 30.1
Hal leek Creek 17,420 24.7
b. Minor tributaries & immediate
drainage (non-point load) - 28,135 40.0
c. Known municipal STP's - None
d. Septic tanks - Unknown ?
e. Known industrial - None
f. Direct precipitation* - 3,690 5_._2
Total 70,440 100.0
2. Outputs -
Reservoir outlet - Nicasio Creek 68,470
3. Net annual N accumulation - 1,970 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Nicasio Creek 22 677
Hal leek Creek 21 774
* See Working Paper No. 175.
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12
E. Yearly Loads:
In the following table, the existing phosphorus loadings
are compared to those proposed by Vollenweider (Vollenweider
and Dillon, 1974). Essentially, his "dangerous" loading is
one at which the receiving water would become eutrophic or
remain eutrophic; his "permissible" loading is that which
would result in the receiving water remaining oligotrophic
or becoming oligotrophic if morphometry permitted. A meso-
trophic loading would be considered one between "dangerous"
and "permissible".
Note that Vollenweider's model may not be applicable to
water bodies with short hydraulic retention times.
Total Phosphorus Total Nitrogen
Total Accumulated Total Accumulated
grams/m2/yr 0.60 loss* 20.6 0.6
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Nicasio Reservoir:
"Dangerous" (eutrophic loading) 0.64
"Permissible" (oligotrophic loading) 0.32
* There was an apparent loss of phosphorus during the sampling year. This
may be indicative of unknown point sources discharging directly to the
reservoir, recharge with phosphorus-rich ground water, resolubilization
of previously sedimented phosphorus, or (probably) underestimation of
the phosphorus load from the minor tributaries and immediate drainage.
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13
LITERATURE REVIEWED
Allum, M. 0., R. E. Glessner, and J. H. Gakstatter, 1977. An
evaluation of the National Eutrophication Survey data. Working
Paper No. 900, Corvallis Env. Res. Lab., Corvallis, OR.
Bailey, Thomas E., 1977. Personal communication (reviews of pre-
liminary reports). CA Water Res. Contr. Bd., Sacramento.
Dendy, William B., 1974. Personal communication (reservoir infor-
mation and morphometry). CA Water Res. Contr. Bd., Sacramento.
Johns, Gerald E., 1975. Personal communication (water quality
information). CA Water Res. Contr. Bd., Sacramento.
Vollenweider, R. A., and P. J. Dillon, 1974. The application of the
phosphorus loading concept to eutrophication research. Natl.
Res. Council of Canada Publ. No. 13690, Canada Centre for Inland
Waters, Burlington, Ontario.
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VI. APPENDICES
14
APPENDIX A
LAKE RANKINGS
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LAKE DATA TO BE USED IN BANKINGS
LAKE
COOE LAKE NAME
0601 A*ADO» RESERVOI*
0602 80CA LAKE
0603 LAKE 8PITTON
0604 CASITAS RESERVUI*
0606 CROWLEY LAKE
0606 DON PEORO RESERVOIR
0607 LAKE ELSINORE
0608 FALLEN LEAF RESERVOIR
0609 LAKE HENNESSEY
0610 LAKE HENSHAW
0611 IRON GATE RESERVOIR
0614 LOPEZ LAKE
0615 LAKE MARY
0616 LAKE MENOOCINO
0617 NICASIO RESERVOIR
0618 LOWER OTAY RESERVOIR
0619 LAKE PILLS8URY
0620 SANTA MARGARITA LAKE
0621 SHASTA LAKE
0622 SHAVER
0623 SILVER LAKE
0624 TULLOCK RESERVOIR
0625 UPPER TWIN LAKES
0626 LOWER TWIN LAKES
MEDIAN
TOTAL P
0.040
0.012
0.067
0.029
0.046
0.013
0.469
0.007
0.027
0.138
0.184
0.371
0.010
0.020
0*055
0.058
0.022
0.037
0.021
0.014
0.012
0.025
0.015
0.014
MEDIAN
I NO* 6 N
0.390
0.040
0.115
0.050
0.045
0.060
0.120
0.040
0.060
0.070
0.690
0.090
0.040
0.050
0.345
0.180
0.060
0.070
0.060
0.060
0.055
0.060
0.040
0.040
500-
MEAN SEC
408.667
372.633
44t5.500
400.250
374.750
381.733
489.214
24.357
416.000
461.000
440.333
372.000
296.000
436.500
482.778
447.250
466.667
400.000
381.542
346.400
356.000
433.000
300.200
248.000
MEAN
CHLOrtA
22.383
1.700
4.811
3.192
5.800
3.564
70.572
0.786
4.525
26.783
6.217
8.658
2.550
3.100
6.633
15.933
6.389
9.122
4.087
1.700
1.800
13.878
3.340
2.900
15-
MlN DO
14.600
6.800
11.200
14.000
12.200
11.400
8.000
8.800
15.000
9.800
13.800
15.000
10.600
9.400
9.800
15.000
U.200
14.800
9.000
7.400
7.000
7.400
7.400
11.400
MEDIAN
DISS ORTiiU P
0.020
0.003
0.04/
0.014
0.034
0.004
0.092
0.005
0.012
0.073
0.124
0.343
0.002
0.008
0.013
0.013
0.008
0.014
0.015
0.004
0.003
0.009
0.004
0.003
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PERCENT OF L4KES wIT-i nlGHEW VALUES (NUMBER OF LAKE.S WlTrl HIGHER VALUES)
LAKE
CODE L4KE NAME
OfeOl A'MDOR RESERVOIR
0603 BOCA LAKE
0603 LAKE HPITTON
0604 CASITAS RESERVOIR
060S CROWLEY LAKE
0606 DON PEORO RESERVOIR
0607 LAKE ELSINORE
0608 FALLEN LEAF RESERVOIR
0609 LAKE HENNESSEY
0610 LAKE HENSHAW
0611 IRON GATE RESERVOIR
0614 LOPEZ LAKE
0615 LAKE MARY
0616 LAKE MENDOCINO
0617 NICASIO RESERVOIR
0618 LOWER OTAY RESERVOIR
0619 LAKE PILLS8URY
0620 SANTA MARGARITA LAKE
0621 SHASTA LAKE
0622 SHAVER
062J SILVER LAKE
0624 TULLOCK RESERVOIR
0625 UPPLR TWIN LAKES
0626 LOWER TWIN LAKES
MEDIAN
TOTAL P
35
89
17
43
30
83
0
100
48
13
9
4
96
65
26
22
57
39
61
78
89
52
70
74
( 8)
( 2C>
( 4)
( 10)
( 7)
( 19)
( 0)
( 23)
( 11)
( 3)
( 2)
< D
( 22)
( 15)
( 6)
< 5)
( 13)
( 9)
( 14)
( 18)
(20)
( 12)
( 16)
( 17)
MEDIAN
4
*8
22
74
78
54
17
87
54
33 i
0 '
26 '
87 i
70 i
9 i
13 i
41 1
33 i
54 1
41 1
65 (
54 (
98 <
67 »
( 1)
( 22)
( 5)
( 17)
( 18)
( 11)
( 4)
( 19)
( 11)
t 7)
( 0)
( 6)
! 19)
[ 16)
t 2)
I 3)
[ 9)
I 7)
I 11)
I 9)
i 15)
: in
: 22)
; 19)
500-
MEAN SEC
43
70
17
48
65
57
0
100
39
13
26
74
91
30
4
22
9 i
52 i
61 <
83 1
78 1
35 1
87 1
96 (
( 10)
( 16)
( 4)
( 11)
( IS)
( 13)
( 0)
< 23)
( 9)
( 3)
( 6)
( 17)
( 21)
t 7)
( 1)
t 5)
I 2)
( 12)
t 14)
I 19)
I 18)
! 8)
: 20)
: 22)
MEAN
CHLORA
9
91
48
7C
43
61
0 i
100 i
52
4 1
39 I
26 i
83 I
74 1
30 <
13 1
35 1
22 (
57 1
96 (
87 (
17 (
65 (
78 (
( 2)
( 21)
( 11)
( 16)
( 10)
( IH)
( 0)
1 23)
( 12)
I 1)
1 9)
1 6)
I 19)
1 17)
1 7)
[ 3)
I 8)
! 5)
: 13)
: 22)
20)
4)
15)
18)
15-
MIN 00
17
100
43
22
30
37
78
70
4
54
26
4
48 I
61 i
54 i
4 I
74 I
13 1
65 1
87 1
96 1
87 (
87 (
37 (
( 4)
( 23)
( 10)
( 5)
( 7)
( 8)
( 18)
( 16)
( 0)
( 12)
( 6)
( 0)
t 11)
! 14)
t 12)
( 0)
t 17)
t 3)
I 15)
! 19)
! 22)
19)
: 19)
8)
MEDIAN
OISS ORTHO f
26
91
17
37
22
78
9
70
52
13
4
0
100 i
63 i
46 i
46 I
63 i
37 (
30 1
78 1
91 (
57 (
78 <
91 (
( 6)
< 20)
( 4)
< 8)
( 5)
< 17)
( 2)
( 16)
( 12)
( 3)
I 1)
( 0)
( 23)
( 14)
( 10)
I 10)
I 14)
'. 8)
[ 7)
; 17)
: 20)
13)
17)
20)
INDEX
NU
134
539
164
29*
268
370
104
527
249
130
104
134
505
363
169
120
279
196
328
463
506
302
485
463
-------
LAKES RANKED BY INDEX N05.
RANK LAKE CODE LAKE NAME INDEX NO
1 0602 BOCA LAKE 539
2 0608 FALLEN LEAF RESERVOIR 527
3 0623 SILVER LAKE 506
4 0615 LAKE MARY 505
5 0625 UPPER TWIN LAKES 485
6 0626 LOWER TWIN LAKES 463
7 0622 SHAVER 463
8 0606 DON PEDRO RESERVOIR 370
9 0616 LAKE MENDOCINO 363
10 0621 SHASTA LAKE 328
11 0624 TULLOCK RESERVOIR 302
12 0604 CASITAS RESERVOIR 394
13 0619 LAKE PILLSBURY 279
14 0605 CROWLEY LAKE 268
15 0609 LAKE HENNESSEY 349
16 0620 SANTA MARGARITA LAKE 196
17 0617 NICASIO RESERVOIR 169
18 0603 LAKE 6RITTON 164
19 0614 LOPEZ LAKE 134
20 0601 AMADOR RESERVOIR 134
21 0610 LAKE HENSHAW 130
22 0618 LOWER OTAY RESERVOIR 120
23 0607 LAKE ELSINORE 104
24 0611 IRON GATE RESERVOIR 104
-------
APPENDIX B
CONVERSION FACTORS
-------
CONVERSION FACTORS
Hectares x 2.471 = acres
Kilometers x 0.6214 = miles
Meters x 3.281 * feet
Cubic meters x 8.107 x 10"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 C
TRIBUTARY FLOW DATA
-------
LAKE CODE 0617
TRIBUTARY FLOW INFORMATION FOR CALIFORNIA
NICASIO RESERVOIR
12/02/76
TOTAL DRAINAGE AREA OF LAKE(SO KM)
SUB-DRAINAGE
TRIBUTARY AREA(SO KM) JAN
FEB
93.3
NORMALIZED FLOWS(CMS)
MAR APR MAY JUN JUL AUG
SEP
OCT
NOV
DEC
MEAN
0617A1
0617A2
0617B1
0617ZZ
93.2
31.3
22.5
93.2
7.354 3.259 2.256 0.919
2.121 1.091 0.606 0.242
1.545 0.788 0.424 0.182
2.657 1.372 0.730 0.321
0
0
0
0
.050
.039
.030
.050
0
0
0
0
.008
.021
.015
.033
0.033
0.009
0.006
0.015
0.050
0.0
0.0
0.0
0.063
0.0
0.0
0.0
0
0
0
0
.059
.091
.061
.117
0.109
0.364
0.273
0.467
SUMMARY
TOTAL DRAINAGE AREA OF LAKE *
SUM OF SUB-DRAINAGE AREAS =
93.2
147.1
TOTAL
TOTAL
FLOW
FLOW
IN =
OUT -
16.
15.
31
12
0.961 1.254
0.909 0.456
0.636 0.328
1.109 0.569
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
0617A1
FLOW DAY
FLOW DAY
0617A2
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
9
10
74
74
75
75
75
75
75
75
75
75
75
75
74
74
75
75
75
75
75
75
75
75
75
75
0.028
0.008
0.008
0.008
4.842
0.238
0.003
0.031
0.037
0.068
0.068
0.017
0.0
0.028
0.110
2.718
1.784
0.246
0.037
0.008
0.0
0.0
0.0
0.003
16
7
4
1
1
12
17
7
12
2
6
18
16
7
4
1
1
12
17
7
12
2
6
18
0.008
O.OC8
0.008
0.008
0.008
0.085
0.003
0.031
0.037
0.068
0.068
0.017
0.0
0.003
0.040
1.218
0.340
0.278
0.020
0.006
0.0
0.0
0.0
0.0
15
15
26
15
15
26
0.008
1.699
0.057
29
FLOW
2.265
1.897
0.595
0.167
29
0.793
-------
TRIBUTARY FLO* INFORMATION FOR CALIFORNIA
LAKE CODE 0617 NICASIO RESERVOIR
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
12/02/76
TRIBUTARY MONTH YEAR
061781
11
12
1
2
3
4
5
6
7
8
9
10
74
74
75
75
75
75
75
75
75
75
75
75
MEAN FLOW DAY
0.0
0.017
0.079
1.954
1.274
0.176
0.025
0.006
0.0
0.0
0.0
0.003
16
7
4
1
1
12
17
7
12
2
6
18
FLOW DAY
0.0
0.003
0.028
0.538
0.252
0.198
0.014
0.006
0.0
0.0
0.0
0.0
FLOW DAY
15
15
26
1.359
0.425
0.119
29
FLOW
0.566
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/09/24
061701
38 04 39.0 122 45 10.0
NICASIO RESERVOIR
06041 CALIFORNIA
140391
DATE
FROM
TO
75/03/13
75/06/26
75/11/11
DATE
FROM
TO
75/03/13
75/06/26
75/11/11
TIME
OF
OAY
10 00
10 00
10 00
10 00
10 00
10 00
10 00
13 20
13 20
13 20
13 20
13 20
13 20
12 00
12 00
12 00
12 00
12 00
TIME
OF
DAY
10 00
10 00
10 00
10 00
10 00
10 00
10 00
13 20
13 20
13 20
13 20
13 20
13 20
12 00
12 00
12 00
12 00
12 00
DEPTH
FEET
0000
0005
0015
0030
0045
0060
0080
0000
0005
0015
0035
0055
0074
0000
0005
0015
0035
0055
DEPTH
FEET
0000
0005
0015
0030
0045
0060
0080
0000
0005
0015
0035
0055
0074
0000
0005
0015
0035
0055
00010
WATER
TEMP
CENT
10.9
10.9
10.9
10.8
10.7
10.0
9.6
16.6
15.9
15.8
15.7
15.6
15.3
16.0
16.0
15.9
16.0
15.9
00665
PHOS-TOT
MG/L P
0.084
0.076
0.076
0.074
3.068
0.073
0.081
0.045
0.048
0.046
0.052
C.052
0.088
0.036
C.036
0.051
0.050
0.044
00300
DO
MG/L
9.2
9.2
9.4
9.0
8.8
8.2
7.6
7.0
7.4
7.0
6.8
6.6
5.2
9.0
8.6
8.6
8.4
8.2
32217
CHLRPHYL
A
UG/L
2.0
4.2
8.7
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
12 114
113
114
114
114
114
121
24 140
140
140
140
135
135
18 171
171
171
171
171
00031
INCDT LT
REMNING
PERCENT
11EPALES 2111202
0084 FEET DEPTH CLASS 00
00400 00410 00610 00625 00630
PH T ALK NH3-N TOT KJEL N02&N03
SU
7.80
7.70
7.70
7.70
7.60
7.50
7.50
7.90
7.80
7.70
7.70
7.60
7.55
7.75
7.70
7.70
7.70
7.70
CAC03
MG/L
62
60
60
59
60
61
65
69
68
67
68
69
68
74
75
74
72
70
TOTAL
MG/L
0.040
0.030
0.030
0.030
0.030
0.030
0.040
0.060
0.040
0.040
0.040
0.040
0.050
0.020
0.020
0.020
0.020
0.020
N N-TOTAL
MG/L
0.600
0.400
0.400
0.400
0.400
0.300
0.400
0.500
0.500
0.500
0.500
0.500
0.200K
0.300
0.200
0.200
0.200
0.200
MG/L
0.510
0.530
0.540
0.540
0.540
0.550
0.560
0.260
0.300
0.310
0.320
0.320
0.350
0.030
0.040
0.040
0.040
0.040
00671
PHOS-OIS
ORTHO
MG/L P
0.054
0.051
0.041
0.034
0.040
0.043
0.048
0.011
0.011
0.011
0.014
0.013
0.013
0.009
0.011
0.010
0.014
0.010
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET WETPIEVAL DATE 76/09/24
0 61702
38 05 17.0 122 43 55.0 3
NICASIO RESERVOIR
06041 CALIFORNIA
140391
11EPALES 2111202
0030 FEET DEPTH CLASS 00
DATE
FROM
TO
75/03/13
75/06/26
75/11/11
DATE
FROM
TO
75/03/13
75/06/26
75/11/11
TIME
OF
DAY
10 50
10 50
10 50
10 50
13 50
13 50
13 50
13 50
12 30
12 30
12 30
TIME
OF
DAY
10 50
10 50
10 50
10 50
13 50
13 50
13 50
12 30
12 30
12 30
DEPTH
FEET
0000
0005
0015
0026
0000
0005
0015
0028
0000
0005
0010
DEPTH
FEET
0000
0005
0015
0026
0000
0005
0015
0000
0005
0010
00010
WATER
TEMP
CENT
11.6
11.6
11.4
11.2
17.2
17.2
17.2
15.9
15.6
15.0
15.0
00665
PHOS-TOT
MG/L P
0.098
0.096
0.103
0.1C7
0.038
0.044
0.055
0.052
0.049
0.045
00300
DO
MG/L
9.
9.
11.
9.
7.
a.
8.
6.
9.
8.
8.
32217
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
4 12
4
0
0
0 24
4
0
6
2 15
8
8
00031
112
112
112
113
140
145
145
145
165
166
165
00400 00410
PH T ALK
CAC03
SU
7
7
7
7
8
8
7
7
7
7
7
.65
.70
.60
.60
.00
.00
.70
.60
.90
.85
.85
MG/L
60
57
60
63
70
63
65
70
67
66
65
00610 00625
NH3-N TOT KJEL
TOTAL N
MG/L
0.050
0.050
0.040
0.040
0.040
0.050
0.060
0.100
0.020K
0.020K
0.020K
MG/L
0.700
0.500
0.400
0.500
0.400
0.400
0.300
0.300
0.300
0.300
0.300
CHLRPHYL INCDT LT
A
UG/L
3.
7.
14.
REMNING
PERCENT
6
1
0
00630 00671
N02&N03 PHOS-DIS
N-TOTAL ORTHO
MG/L MG/L P
0.520
0.510
0.520
0.520
0.190
0.160
0.170
0.190
0.020K
0.020K
0.020K
0.053
0.055
0.047
0.041
0.006
0.014
0.008
0.010
0.009
0.009
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
061703
38 04 12.0 122 43 27.0 3
NICASIO RESERVOIR
06041 CALIFORNIA
140391
DATE
FROM
TO
75/03/13
75/06/26
75/11/11
DATE
FROM
TO
75/03/13
75/06/26
75/11/11
TIME DEPTH
OF
DAY FEET
11 ?5 0000
11 25 0005
11 25 0015
11 25 0032
14 15 0000
14 15 0005
14 15 0015
14 15 0029
12 45 0000
12 45 0005
12 45 0015
TIME DEPTH
OF
DAY FEET
11 25 0000
11 25 0005
11 25 0015
11 25 0032
14 15 0000
14 15 0005
14 15 0015
14 15 0029
12 45 0000
12 45 0005
12 45 0015
00010
WATER
TEMP
CENT
11.7
11.7
11.7
11.3
18.9
18.2
16.7
15.9
15.1
15.1
14.9
00665
PHOS-TOT
MG/L P
0.115
0.123
0.112
C.107
0.048
C.050
0.048
0.069
0.055
0.059
00300
DO
MG/L
9.
9.
9.
9.
7.
10.
6.
5.
9.
8.
8.
32217
00077
TRANSP
SECCHI
INCHES
2 11
2
2
2
8 24
4
0
8
2 15
6
6
00031
00094
CNDUCTVY
FIELD
MICROMHO
113
114
114
118
155
150
140
140
169
167
169
11EPALES 2111202
0036 FEET DEPTH CLASS 00
00400 00410 00610 00625
PH
SU
7.60
7.65
7.60
7.60
8.15
8.10
7.70
7.60
8.10
7.90
7.80
T ALK
CAC03
MG/L
63
63
64
68
68
69
67
67
70
60
62
NH3-N TOT KJEL
TOTAL
MG/L
0.060
0.040
0.040
0.060
0.050
0.050
0.060
0.070
0.020K
0.020
0.030
N
MG/L
0.800
0.600
0.500
0.500
0.300
0.400
0.300
0.300
0.500
0.600
0.400
00630
N02&N03
N-TOTAL
MG/L
0.500
0.490
0.490
0.440
0.110
0.130
0.210
0.290
0.020K
0.020K
0.020K
00671
PnOS-DIS
ORTHO
MG/L P
0.048
0.058
0.055
0.043
0.006
0.010
0.010
0.012
0.011
0.010
0.008
CHLRPHYL INCDT LT
A
UG/L
6.
6.
6.
REMNING
PERCENT
4
9
6
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
STORET RETRIEVAL DATE 76/09/24
061/A1
38 04 25.0 122 45 20.0 4
NICASIO CREEK
06 7.5 INVERNESS
O/NICASIO RESERVOIK 140391
dNK 50 FT £ SEC RD .1 MI BELO DAM
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/11/16
74/12/07
75/01/04
75/02/01
75/02/15
75/03/01
75/03/15
75/03/29
75/04/12
75/04/26
75/05/17
75/06/07
75/07/12
75/08/02
75/09/06
75/10/18
10 05
09 36
09 35
09 55
08 40
08 30
10 00
10 15
08 30
08 30
10 15
09 45
09 45
09 45
09 00
09 00
0630
'&N03
OTAL
iG/L
0.256
0.272
0.304
0.184
0.704
0.480
0.464
0.436
0.390
0.360
0.005
0.350
0.290
0.290
0.160
0.035
00625
TOT KJEL
N
MG/L
2.300
2.400
0.946
3.200
1.200
0.600
1.800
1.150
0.900
2.900
0.800
0.800
0.550
1.100
0.600
00610
NH3-N
TOTAL
MG/L
0.060
0.040
0.016
0.032
0.048
0.016
0.008
0.018
0.020
0.025
0.020
0.045
0.015
0.020
0.035
0.010
00671
PHOS-DIS
OHTriO
MG/L P
0.015
0.010
0.007
0.010
0.016
0.040
0.040
0.049
0.040
0.035
0.010
0.020
0.015
0.015
0.015
0.005K
00665
PHOS-TOT
MG/L P
0.050
0.040
0.030
0.070
0.060
0.070
0.030
0.110
0.060
0.070
0.060
0.090
0.060
0.060
0.060
K VALUE KNOWN TO 8E
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/34
0617A2
38 03 45.0 1-22' 41 55.0 4
NICASIO CSEEK
06 7.5 SAN GEKONIMO
T/NICASIO RESERVOIK 140391
UNPVD KO BtfDG .1 MI NW OF NICASIO
11EPALES 2111204
0000 FEET DEPTH CLASS 00
DATE TIME DEPTH N025.N03
FROM OF
TO DAY FEET
74/11/16
74/13/07
75/01/04
75/02/01
75/02/15
75/03/01
75/03/15
75/03/29
75/04/26
75/05/17
75/06/07
75/07/1?
75/08/02
75/09/06
75/10/18
09 30
09 51
09 50
10 10
08 55
08 45
10 30
09 45
09 00
10
10
10 15
09 00
09
09
38
00
15
15
0630
5.N03
OTAL
IG/L
0.166
0.168
0.920
C.660
0.400
3 . <»64
0.340
0.222
0. 100
0.145
C.060
0.120
0.145
0.210
0.145
00625
TOT KJEL
N
MG/L
1.600
1.500
2.600
1.150
1.700
0.300
0.300
1.000
0.450
1.400
0.550
2.500
0.500
1.900
0.300
00610
NH3-N
TOTAL
MG/L
0.030
0.025
0.060
0.024
0.032
0.008
0.008K
0.009
0.015
0.035
0.025
0.04Q
0.010
0.025
0.015
00671
PHOS-OIS
ORTHO
MG/L P
0.025
0.015
0.020
0.030
0.024
0.024
0.024
0.024
O.Olb
0.015
0.010
0.015
0.025
0.130
0.025
00665
PHOS-TOT
MG/L P
0.030
0.030
0.020
0.130
0.060
0.030
0.030
0.030
0.030
0.080
0.010
0.030
0.030
0.130
0.040
K VALUE KNOWN TO Bt
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
DATE TIME DEPTH N02S.N03
FROM OF
TO DAY FEET
74/12/07
75/01/04
75/02/01
75/02/15
75/03/01
75/03/15
75/03/29
75/04/12
75/04/26
75/05/17
75/06/07
75/07/12
09 56
10 00
10 30
09 00
08 55
10 45
10 00
09 00
09 IS
10 45
10 10
10 20
0617B1
38 04 05.0 122 42 05.0 4
HALLECK CREEK
06 7.5 SAN GERONIMO
T/NICASIO RESERVOIR 140391
SEC «D BRDG .4 MI Ntt OF NICASIO
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
'S.N03
OTAL
IG/L
0.528
0.780
0.990
0.640
0.600
0.320
0.317
0.165
0.130
0.125
0.035
0.030
00625
TOT KJEL
N
MG/L
0.800
2.100
1.000
1.500
0.700
0.500
0.750
0.750
1.150
2.300
0.500
3.500
00610
NH3-N
TOTAL
MG/L
0.025
0.045
0.032
0.032
0.008
0.008K
0.024
0.015
0.015
0.022
0.025
0.045
00671
PHOS-DIS
ORTHO
MG/L P
0.025
0.015
0.040
0.024
0.016
0.016
0.018
0.015
0.015
0.035
0.020
0.035
00665
PHOS-TOT
MG/L P
0.040
0.020
0.130
0.080
0.020
0.030
0.030
0.015
0.020
0.080
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |