U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
LAKE BRITTON
SHASTA COUNTY
CALIFORNIA
EPA REGION IX
WORKING PAPER No,
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
LAKE BRITTON
SHASTA COUNTY
CALIFORNIA
EPA REGION IX
WORKING PAPER No,
WITH THE COOPERATION OF THE
CALIFORNIA STATE WATER RESOURCES CONTROL BOARD
AND THE
CALIFORNIA NATIONAL GUARD
JUNE, 1978
-------
CONTENTS
Page
Forov.'ord ii
List of California Study Lakes iv
v,vi
Lake and Drainage Area Map
Sections
I. Conclusions 1
II. Reservoir and Drainage Basin Characteristics 4
III. Water Quality Summary 5
IV. Nutrient Loadings 10
V. Literature Reviewed 16
VI. Appendices 17
-------
11
FOREWORD
The National Eutrophication .Survey was initiaced 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 Hater Pollution Control Act Amendments of 1972.
-------
m
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.
-------
IV
NATIONAL EUTROPHICATION SURVEY
STUDY RESERVOIRS
State of California
Name
Amador
Boca
Britton
Casitas
Crowley
Don Pedro
Elsinore
Fallen Leaf
Hennessey
Henshaw
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
-------
]
B1
\
daml
utlet V 01
E1
IC1
BRIT JON
\ \
\
\
V
4103-
Map Location
121"40
LAKE BRITTON
<8> Tributary Sampling Site
X Lake Sampling Site
!ffli Land Subject to Inundation
1 2 3 4 Km.
1 Scale
2 Mi.
12135
D1V
40 58-
-------
A, Lm,1^ Cr
: , Valley
LAKE BRITTON
Tributary Sampling Site
X Lake Sampling Site
Land Subject to Inundation
5 10 15 20 Kill.
Map Location
Scale
10 Mi.
12130
I
2115
I
-------
LAKE BRITTON
STORE! NO. 0603
I. CONCLUSIONS
A. Trophic Condition*:
Survey data indicate that Lake Britton is eutrophic.
However, because this water body has a mean hydraulic reten-
tion time of only 6 days, it more closely resembles a slow-
moving river, and the term over-enriched may be a more
appropriate description. Lake Britton ranked eighteenth in
overall trophic quality among the 24 California lakes and
reservoirs sampled in 1975 when compared using a combination
of six parameters**. Nineteen of the water bodies had less
median total phosphorus and orthophosphorus, 18 had less
median inorganic nitrogen, 12 had less mean chlorophyll £,
and 19 had greater mean Secchi disc transparency. Some
depression of dissolved oxygen with depth occurred at
station 1 in July (minimum of 3.8 mg/1).
Survey limnologists noted that the reservoir was quite
turbid in March and observed moderate surface concentrations
of algae in July.
Other investigators of Lake Britton assess the trophic
state as mesotrophic, but turbidity is noted as a problem
along with phytoplankton growth due to biostimulants (Johns,
1975).
* Trophic assessment is based on levels of nutrients, dissolved oxygen, and
chlorophyll a; phytoplankton kinds and numbers; and transparency (Allum
et al., 19771.
** See Appendix A.
-------
B. Rate-Limiting Nutrient:
The algal assay results indicate that Lake Britton was
nitrogen limited at the times samples were collected (03/26/75
and 11/03/75). The reservoir data indicate nitrogen limitation
at all sampling stations and times. However, the low Secchi
disc transparencies in March indicate that at times the reservoir
may be light-limited due to the turbidity noted above.
C. Nutrient Controllability:
1. Point-sources—During the sampling year, point sources
accounted for only 1.3% of the total phosphorus input to Lake
Britton. The Crystal Lake Fish Hatchery contributed essentially
all of this load; the effluent phosphorus load of the Pit River
Hatchery was negligible in comparison to the load measured in
the influent. Septic tanks serving shoreline parks and campgrounds
were estimated to have contributed less than 0.1% of the total
load.
The present phosphorus loading of 43.62 g/m2/year is over
nine times that proposed by Vollenweider (Vollenweider and
Dillon, 1974) as a eutrophic loading (see page 15). Although
Vollenweider's model may not be applicable to water bodies with
short hydraulic retention times, the high phosphorus concen-
trations in the reservoir indicate the present loading is exces-
sive.
-------
2. Non-point sources--Non-point sources contributed 98.7%
of the total phosphorus load during the sampling year. The
Pit River contributed 71.4%, Hat Creek contributed 23.3%, and
two other gaged tributaries collectively contributed 3.6%. The
ungaged minor tributaries and immediate drainage contributed
an estimated 0.4%.
The phosphorus export rate of Hat Creek, 55 kg/km2/year,
is significantly higher than the rates of the other gaged tri-
butaries (see page 14). This may be indicative of unknown
point sources, underestimation of the point source loads men-
tioned above, or the impact of irrigation return flows. In
another report, it is noted that about 33,650 hectares in the
drainage basin are irrigated with water diverted from the
tributaries of this lake (Anonymous, 1975). Additional in-
vestigation is needed to determine the significance and con-
trollability of nutrients from such non-point sources in the
drainage basin.
-------
II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphometry^:
1. Surface area: 5.12 Kilometers2.
2. Mean depth: 9.8 meters.
3. Maximum depth: 36.6 meters.
4. Volume: 50.100 x 106 m3.
5. Mean hydraulic retention time: 6 days (based on outflow).
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
t.
Drainage Mean Flow
Name area (km2)* (m3/sec)*
Pit River 10,328.9 66.54
Clark Creek 50.2 1.08
Burney Creek 471.4 5.86
Hat Creek 942.8 23.22
Minor tributaries &
immediate drainage - 131.1 0.82
Totals 11,924.4 97.52
2. Outlet -
Pit River 11,929.5** 94.47
C. Precipitation***:
1. Year of sampling: 94.8 centimeters.
2. Mean annual: 90.2 centimeters.
t Table of metric equivalents—Appendix B.
tt Dendy, 1974.
* For limits of accuracy, see Working Paper No. 175, "... Survey Methods,
1973-1976".
** Includes area of reservoir.
*** See Working Paper No. 175.
-------
III. WATER QUALITY SUMMARY
Lake Britton 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 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 ^analysis. The maximum depths sampled were 23.8 meters
at station 1, 13.7 meters at station 2, and 8.5 meters at station 3.
The sampling results are presented in full in Appendix D and are
summarized in the following table.
-------
PARAMETER
TEMP (C) -
DISS OXY (MG/L)
CNOCTVY (MCROMO)
PH (STAND UNITS)
TOT ALK (MG/L)
TOT ? (MG/L)
ORTHO P (MG/L)
N02+N03 (MG/L)
AMMONIA (MG/L)
KJEL N (MG/L)
INORG N (MG/L)
TOTAL N (MG/D
CHLR^YL A (ur,/L)
SECCHI (METERS)
A. SUMMARY or PHYSICAL AND
1ST SAMPLING ( 3/26/75)
3 SITES
RANGE
6.2 - 7.1
10.0 - 10.8
127. - 393.
MEAN MEDIAN
6.5 6.5
10.4 10.4
232.
8.4
214.
8.1 - 8.8 8.4 8.5
50. - 72. 65. 66.
C.051 - 0.097 0.084 0.085
0.050 0.050
0.110
0.050
0.025 - 0.064
0.090 - 0.120
0.040 - 0.070
0.111
0.049
0.200 - 0.600 0.343 0.300
0.130 - 0.180 0.160 0.160
0.415
1.8
0.310 - 0.710 0.454
1.6 - 1.9 1.8
0.3 - 0.6 0.4
0.5
CHEMICAL CHARACTERISTICS FOR LAKE BRITTON
STORET CODE 0603
2ND SAMPLING < 7/14/75)
3 SITES
RANGE
11.6 - 22.1
3.8 - 13.8
108. - 150.
7.4 - 9.3
69. - 89.
0.057 - 0.162
0.011 - 0.131
0.020 - 0.210
0.020 - 0.070
0.200 - 0.700
0.040 - 0.280
0.220 - 0.720
4.2 - 12.2
««»«»» —eeea»««
3RD SAMPLING III/ 3/75)
3 SITES
MEAN
18.0
9.2
134.
8.7
76.
0.073
0.042
0.043
0.028
0.333
0.071
0.376
9.1
»»«««»«
MEDIAN
18.6
9.4
137.
8.8
76.
0.064
0.040
0.020
0.020
0.300
0.040
0.340
10.8
»««««««
RANGE
10.9
9.6
73.
7.9
67.
0.061
0.039
O.ObO
0.020
0.200
0.080
0.260
2.3
1.9
- 12.7
- 10.6
- 103.
8.2
80.
- 0.077
- 0.051
- 0.100
- 0.020
- 0.200
- 0.120
- 0.300
5.U
2.3
MEAN
11.9
10.0
95.
8.1
77.
0.066
0.046
0.083
0.020
0.200
0.103
0.283
3.6
2.2
MEDIAN
11.9
10.0
97.
8.1
78.
0.066
0.047
0.030
0.020
0.200
0. 100
0.280
3.5
2.3
-------
B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
03/26/75
07/14/75
11/03/75
Dominant
Genera
1.
2.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Centric diatoms
Chroomonas (?) sp.
Total
Melosira sp.
Anabaena sjx
Synedra sp.
Fragilaria sp.
Chroomonas (?) sp.
Other genera
Total
Fragilaria sp.
Oocystis sp.
Chaetoceros sp.
Chroomonas (?) sp.
Cryptomonas sp.
Algal Units
per ml
189
54
Total
243
1,000
437
219
125
125
187
2,093
138
79
39
39
20
315
-------
8
2. Chlorophyll a_ -
Sampling
Date
03/26/75
07/14/75
11/03/75
Station
Number
1
2
3
1
2
3
1
2
3
Chlorophyll a^
(yg/D
1.6
1.8
1.9
10.8
12.2
4.2
5.0
3.5
2.3
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
a. March sample -
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N =
b. November sample -
Ortho P
Cone, (mg/1)
Inorganic N
Cone, (mg/1)
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
Ortho P
Cone, (mg/1)
0.040
0.090
0.090
0.040
Inorganic N
Cone, (mg/1)
0.105
0.105
1.105
1.105
Maximum yield
(mg/1-dry wt.)
0.055
0.105
0.105
0.055
0.195
0.195
1.195
1.195
7.6
7.9
45.8
32.6
Maximum yield
(mg/1-dry wt.)
6.2
6.0
12.6
27.2
-------
3. Discussion -
The control yields of the assay alga, Selenastrum capri-
cornutum, indicate that the potential primary productivity
of Lake Britton was high at the times the samples were col-
lected (03/26/75 and 11/03/75). Also in both assays, the
lack of increase in yield with the addition of phosphorus
until nitrogen was also added in combination indicates that
the reservoir was limited by nitrogen at those times. Note
that the addition of nitrogen alone resulted in yields sig-
nificantly greater than those of the controls.
The reservoir data also indicate nitrogen limitation. The
mean inorganic nitrogen/orthophosphorus ratios were 4/1 or
less at all sampling stations and times, and nitrogen limi-
tation would be expected.
-------
10
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 vi). 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 calcu-
lated using mean annual concentrations and mean annual flows. Nutrient
loads shown are those measured minus point-source loads, if any.
Nutrient loads for unsampled "minor tributaries and immediate
drainage" ("IT1 of U.S.G.S.) were estimated using the mean concentrations
in Clark Creek at station B-l and the mean annual ZZ flow.
Nutrient loads for the Crystal Lake and Pit River fish hatcheries
were calculated using mean nutrient concentrations and flows given in
previous reports (Day, 1972a & 1972b).
No known municipal or industrial wastewater treatment plants impacted
Lake Britton during the sampling year.
-------
11
A. Waste Sources:
1. Known municipal - None
2.. Known industrial - None
3. Fish hatcheries* -
Name
Crystal Lake
Pit River
Treatment
none
none
Mean Flow**
(m3/d)
62,394.6
92,980.2
Receiving
Hater
Baum Lake/Hat Creek
Pit River
* Day, 1972 and 1972b.
** Outflow assumed to be equal to inflow.
-------
12
B. Annual Total Phosphorus Loading - Average Year:
1. Inputs -
kg P/ % of
Source yr total
a. Tributaries (non-point load) -
Pit River 159,480 71.4
Clark Creek 1,125 0.5
Burney Creek 6,840 3.1
Hat Creek 51,960 23.3
b. Minor tributaries & immediate
drainage (non-point load) - 855 0.4
c. Known minicipal STP's - None
d. Septic tanks* - 5 <0.1
e. Known industrial - None
f. Fish hatcheries -
Crystal Lake 2,960 1.3
Pit River **
g. Direct precipitation*** - 90_ <0.1
Total 233,315 100.0
2. Outputs -
Reservoir outlet - Pit River 226,420
3. Net annual P loss - 3,105 kg.
* Estimate based on one shoreline park and two campgrounds; see Working
Paper No. 175.
** Negligible load.
*** See Working Paper No. 175.
-------
13
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Pit River 1,884,155 8.2
Clark Creek 11,580 0.5
Burney Creek 184,800 7.7
Hat Creek 304,915 12.6
b. Minor tributaries & immediate
drainage (non-point load) - 8,790 0.4
c. Known minicipal STP's - None
d. Septic tanks* - 175 <0.1
e. Known industrial - None
f. Fish hatcheries -
Crystal Lake 4,100 0.2
Pit River 4,410 0.2
g. Direct precipitation** - 5,530 0.2
Total 2,408,455 100.0
2. Outputs -
Reservoir outlet - Pit River 2,454,865
3. Net annual N loss - 46,410 kg.
* Estimate based on one shoreline park and two campgrounds; see Working
Paper No. 175.
** See Working Paper No. 175.
-------
14
/
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Pit River 15 182
Clark Creek 22 231
Burney Creek 15 392
Hat Creek 55 323
E. Mean Nutrient Concentrations in Ungaged Stream:
Mean Total P Mean Total N
Tributary Cone, (mg/1) Cone, (mg/1)
Clayton Creek 0.022 1.150
-------
15
F. 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 43.62 loss* 470.4 loss*
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Lake Britton:
"Dangerous" (eutrophic loading) 4.60
"Permissible" (oligotrophic loading) 2.30
* There was an apparent loss of nutrients during the sampling year. This
may have been due to solubilization of previously sedimented nutrients,
recharge with nutrient-rich ground water, unsampled point sources dis-
charging directly to the reservoir, or (probably) insufficient outlet
sampling in relation to the short hydraulic retention time.
-------
16
LITERATURE REVIEWED
Allum, M.O., R.E. Glessner, and J.H. Gakstatter, 1977. An evalua-
tion of the National Eutrophication Survey data. Working Paper
No. 900, Corvallis Env. Res. Lab., Corvallis, OR.
Anonymous, 1975. Water resources data for California. Part 1:
Surface water records; vol. 2, Northern Great Basin and
Central Valley. U.S. Geol. Surv., Menlo Park.
Day, John S., 1972a. Waste characteristics of the Crystal Lake
Fish Hatchery, Shasta County, California, 1971-72. CA Dept.
of Fish & Game, Rancho Cordova.
, 1972b. Waste characteristics of the Pit River Fish
Hatchery, Shasta County, California. CA Dept of Fish & Game,
Rancho Cordova.
Dendy, William B., 1974. Personal communication (waterbody infor-
mation and morphometry). CA Water Res. Contr. Bd., Sacramento.
Johns, Gerald E., 1975. Personal communication (water quality
control plan for Lake Britton). 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.
-------
17
VI. APPENDICES
APPENDIX A
LAKE RANKINGS
-------
LA
-------
PERCENT Of LS
"IT
VALUES (NU^dE* OF LAKES WlTri HIGHER VALUES)
COOE
ObOl
060?
0603
0604
0605
060b
0607
060fl
0609
Obio
0611
0614
0615
0616
0617
0618
0619
0620
0621
0622
062J
0624
0625
0626
LIKE NAME
A'-'ADOR RESE«VOIri
BOCA LAKE
LAKE bPITTON
CA5ITAS RESERVOIR
CROWLEY LAKE
DON PEORO RESERVOIR
LAKE ELSINORE
FALLEN LEAF RESERVOIR
LAKE HF.NNESSEY
LAKE HENSHAW
IRON GATE RESERVOIR
LOPEZ LAKE
LAKE MARY
LAKE MENDOCINO
NICASIO RESERVOIR
LOWER OTAY RESERVOIR
LAKE "ILLS9URY
SANTA MARGARITA LAKE
SHASTA LAKE
SHAVER
SILVEH LAKE
TULLOCK RESERVOIR
UPPtR TWIN LAKES
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)
1)
22)
15)
6)
5)
13)
9)
14)
18)
20)
12)
16)
17)
MEDIAN
IIMOPG N
L>
VH
22
74
78
b4
17
87
54
33
0
26
87
70
9
13
41
33
54
41
65
54
93
87
( 1)
( 22)
( 5)
( 17)
( 18)
( 11)
( 4)
( 19)
( 11)
( 7)
( 0)
( 6)
( 19)
( 16)
( 2)
( 3)
( 9)
( 7)
( 11)
( 9)
( 15)
( 11)
( 22)
( 19)
500-
MEAN SEC
43
70
17
48
65
57
0
100
39
13
26
74
91
30
4
22
9
52
61
83
78
35
87
96
( 10)
< 16)
( 4)
( 11)
( IS)
( 13)
( 0)
( 23)
( 9)
( 3)
( 6)
< 17)
( 21)
( 7)
( 1)
( 5)
( 2)
( 12)
( 14)
( 19)
( 18)
( 8)
( 20)
( 22)
MEAN
CHLORA
i i
91
48 I
7C (
43 1
61 i
0 i
100 1
52 1
4 1
39 1
26 1
83 <
74 1
30 1
13 I
35 1
22 <
57 (
96 (
87 (
17 <
65 (
78 (
I 2)
1 21)
I 11)
I 16)
( 10)
I It)
( 0)
I 23)
1 12)
I 1)
I 9)
1 6)
[ 19)
; 17)
[ 7)
; 3)
: a>
5)
: 13)
22)
20)
4)
15)
18)
15-
MIN 00
17
100
43
22
30
37
78
70
4
54
26
4
48
61
54
4
74
13
65
87
96
87
87
37
( 4)
( 23)
( 10)
( 5)
( 7)
( 8)
( 18)
( 16)
( 0)
( 12)
( 6)
( 0)
( 11)
( 14)
( 12)
( 0)
( 17)
( 3)
< 15)
( 19)
( 22)
( 19)
( 19)
( 8)
MEOIAN
OISS ORTMO P
26
91
17
37
22
78
9
70
52
13
4
0 '
100 '
63 i
46 i
46 I
63 i
37 1
30 1
78 1
91 <
57 (
78 1
91 1
( 6)
( 20)
( <*)
( 8)
( 5)
( 17)
( 2)
( 16)
( 12)
( 3)
( 1)
1 0)
( 23)
I 14)
( 10)
( 10)
! 14)
1 8)
I 7)
I 17)
1 20)
; u)
; 17)
: 20)
INDEX
NU
134
5J9
164
29<»
268
370
104
527
249
130
104
1J4
505
363
169
120
279
196
328
463
506
302
485
463
-------
LAKES RANKED BY INOCX NOS.
RANK LAKE CODE LAKE NAME INQEA NO
1 0603 BOCA LAKE 539
2 060d FALLEN LEAF RESERVOIR 527
3 0623 SILVER LAKE 506
4 0615 LAKE MARY 505
5 0625 UPPER TWIN LAKES 465
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 294
13 0619 LAKE PILLS8URY 279
14 0605 CROrtLEY LAKE 268
15 0609 LAKE HENNESSEY 249
Ifo 0620 SANTA MARGARITA LAKE 196
17 0617 NICASIO RESERVOIR 169
18 0603 LAKE 6RITTON 164
19 0614 LOPEZ LAKE 134
20 0601 AMAOOR 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 ~ - acre/feet
Square kilometers x 0.3861 = square miles
Cubic meters/sec x 35.315 - cubic feet/sec
Centimeters x 0.3937 = inches
Kilograms x 2.205 = pounds
Kilograms/square kilometer x 5.711 = Ibs/square mile
-------
APPENDIX C
TRIBUTARY FLOW DATA
-------
TRIBUTARY FLOW INFORMATION FOR CALIFORNIA
08/17/77
LAKE CODE 0603
LAKE BRITTON
TOTAL DRAINAGE AREA OF LAKEfSQ KM) 11939.5
SUB-DRAINAGE
TRIBUTARY ARCA(SQ r>M>
NORMALIZED FLOWS (CMS)
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
MEAN
0603A1
0603A2
060 3B1
0603C1
0603D1
0603ZZ
11929.5
10328.9
50.2
471.4
942.8
131.1
158.29
261.18
2.13
23.38
23.01
2.32
113.55
62.35
1.44
5.18
21.28
1.10
137.62
71.94
2.38
5.52
21.28
1.45
128.84
77.10
2.13
6.01
22.22
1.41
99.39
37.07
2.13
3.62
29.72
1.08
75.32
21.43
0.52
2.28
31.98
0.43
63.15
19.55
O.I?
1.98
24.20
0.19
54.09
22.83
0.11
2.18
21.14
0.14
63.71
24.87
0.10
2.01
20.60
0.13
73.91
35.03
0.52
2.82
20.21
0.18
77.02
73.82
O.b5
7.09
22.47
0.62
89.48
88.83
0.75
8.00
20.49
0.82
94.47
66.54
1.08
5.86
23.22
0.82
SUMMARY
TOTAL DRAINAGE AREA OF LAKE = 11929.5
SUM OF SUB-DRAINAGE AREAS = 11924.4
TOTAL FLOW IN
TOTAL FLOW OUT
1167.33
1134.37
MEAN MONTHLY FLOWS AND DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR MEAN FLOW DAY
0603A1
FLOW DAY
FLOW DAY
FLOW
0603A?
11
12
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
P
9
10
74
74
75
75
75
75
75
75
75
75
75
75
74
7n
75
75
75
75
75
75
75
75
75
75
78.438
73.624
74.190
1D5.055
139.602
138.469
132. £40
84.667
66.261
61.731
67.394
77.305
49.554
47.289
46.440
80.420
108.454
1&7.321
105.055
58.616
40.776
42.475
45.024
48.7v5
16
16
18
23
3
1
4
16
It-
16
8
29
3
1
4
73.057
74.756
38.511
137.054
138.753
83.818
92.030
51.820
50.121
51.537
47.006
93.162
95.711
45.024
48.988
-------
TRIBUTARY FLOW INFORMATION FOR CALIFORNIA
08/17/77
( LAKE CODE 0603
LAKE BRITTON
MEAN MONTHLY FLOWS AND OAILY FLOWS(CMS)
TRIBUTARY MONTH YEAR
MEAN FLOW DAY
FLO* DAY
FLOW DAY
FLO*
0603B1
0603C1
060301
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
P
9
10
11
12
1
2
3
4
5
6
7
e
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
74
74
75
75
75
75
75
75
75
75
75
75
74
74
75
75
75
75
75
75
75
75
75
7-3
C.198
0.212
0.207
1.019
1.954
1.614
3.285
0.793
0.195
0.116
0.102
0.110
4. 134
3.710
3.625
5.833
7.249
7.277
8.891
5.437
3.568
3.540
3.171
3.426
22.22Q
23.418
22.880
23.305
25.315
24.919
19.397
22.710
21.804
21.323
21.521
24.268
0.510
3.538
0.510
1.756
2.718
2.435
3.794
1.472
0.481
0.311
0.283
0.311
16
16
18
8
29
3
1
4
16
16
18
b
29
3
1
4
16
16
18
8
29
3
1
4
0.164
0.1 84
0.184
0.538
1.982
4.814
0.144
0.269
3.540
3.200
3.200
4.672
7.391
11.270
4.191
3.823
22.795
23.786
22.795
23.305
25.230
24.692
21.464
20.926
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/09/24
00010
DATE
FROM
TO
75/03/26
75/07/14
'
75/11/03
TIME
OF
DAY
14
14
14
14
14
11
11
11
11
11
11
13
13
13
13
13
00
00
00
00
00
10
10
10
10
10
10
40
40
40
40
40
DEPTH
FEET
0000
0005
0015
0045
0075
0000
0005
0010
0021
0040
0078
0000
0005
0017
0040
0072
WATER
TEMP
CENT
7
7
6
6
6
21
20
19
12
14
11
12
11
11
11
11
.1
.0
.7
.6
.5
.1
.5
.1
.4
.4
.6
.1
.9
.9
.7
.2
00300
DO
MG/L
10.4
10.3
10.0
10.2
1C.4
7.4
10.6
9.8
8.8
9.2
3.8
10.4
9.8
9.8
9.8
9.6
00077
TRANSP
SECCHI
INCHES
19
76
00094
CNDUCTVr
FIELD
MICROMHO
380
127
393
243
295
137
142
138
136
119
108
103
99
99
97
81
060301
41 01 18.0 121 40 02.0 3
LAKE BRITTON
06089 CALIFORNIA
140991
11EPALES 2111202
0060 FEET DEPTH CLASS 00
94
Tvr
MHO
380
127
393
243
295
137
142
138
136
119
108
103
99
99
97
81
00400
PH
SU
8.80
8.10
8.60
6. 45
8.60
9.30
9.20
8.80
8.65
8.45
7.40
8.10
8.1U
8.00
8.00
7.90
00410
T ALK
CAC03
MG/L
64
63
64
66
67
75
78
89
80
69
73
80
78
78
78
67
00610
NH3-N
TOTAL
MG/L
0.070
0.040
0.050
0.060
0.060
0.020
0.020
0.020K
0.030
0.040
0.070
0.020K
0.020K
0.020K
0.020
0.020
00625
TOT KJEL
N
MG/L
0.600
0.300
0.300
0.200
0.200
0.500
0.500
0.300
0.400
0.200
0.300
0.200K
0.200K
0.200K
0.200K
0.200
00630
N02&N03
N-TOTAL
MG/L
0.110
0.110
0.120
0.120
0.120
0.020K
0.020K
0.040
0.030
0.090
0.210
0.070
0.080
0.060
0.100
0.100
00671
PHOS-DIS
ORTHO
MG/L P
0.047
0.052
0.060
0.046
0.037
0.011
0.015
0.039
0.047
0.043
0.131
0.045
0.047
0.048
0.049
0.039
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
060301
41 01 18.0 121 40 02.0 3
LAKE 8RITTON
06089 CALIFORNIA
140991
11EPALES 2111202
0080 FEET DEPTH CLASS 00
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/03/26 14 00 0000
14 00 0005
14 00 0015
14 00 0045
14 00 0075
75/07/1* 11 10 0000
11 10 0005
11 10 0010
11 10 0021
11 10 0040
11 10 0078
75/11/03 13 40 0000
13 40 0005
13 40 0017
13 40 0040
13 40 0072
0665
S-TOT
/L P
0.084
0.077
0.087
0.085
0.092
0.064
0.060
0.062
0.064
0.057
0.162
0.067
0.068
0.066
0.067
0.062
32217
CHLRPHYL
A
UG/L
1.6
10.8
5.0
00031
INCDT LT
REMNING
PERCENT
-------
STORET RETRIEVAL DATE 76/09/24
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/03/26 14 35 0000
14 35 0005
14 35 0015
14 35 0030
14 35 0045
75/07/1** 10 45 0000
10 45 0005
10 45 0015
10 45 0022
10 45 0038
75/11/03 14 10 0000
14 10 0005
14 10 0019
14 10 0036
00010
*AT£R
TEMP
CENT
00300
00
MG/L
6.2
6.2
6.6
6.5
6.4
22.1
22.1
18.3
17.5
15.7
12.7
12.0
11.8
10.9
10.8
10.8
10.4
10.5
10.6
13.8
10.0
9.6
8.8
9.6
10.6
10.4
9.6
10.2
00077 00094
TRANSP CNOUCTVY
SECCHI FIELD
INCHES MICROMHO
22
90
204
225
334
137
134
150
137
134
139
125
97
97
95
73
060302
41 01 40.0 121 39 30.0 3
LAKE 8RITTON
06089 CALIFORNIA
140991
11EHALES
0049 FEET
D
00400 00410
PH T ALK
CAC03
SU MG/L
8.70
8.55
8.85
8.20
8.10
9.25
9.00
8.80
8.65
8.65
8.10
8.10
8.00
8.20
52
50
66
64
66
74
76
78
75
75
79
80
80
79
2111202
DEPTH CLASS 00
00610
NH3-N
TOTAL
MG/L
0.060
0.040
0.040
0.040
0.050
0.020
0.020
0.020
0.020K
0.040
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.500
0.300
0.300
0.300
0.400
0.700
0.400
0.200
0.200K
0.200
0.200K
0.200K
0.200K
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.090
0.090
0.110
0.110
0.110
0.020K
0.020K
0.020K
0.020K
0.060
0.060
0.060
0.080
0.060
00671
PHOS-DIS
ORTHO
MG/L P
0.054
0.025
0.047
0.054
0.049
0.017
0.027
0.036
0.041
0.039
0.042
0.044
0.045
0.042
K VALUE KNOWN TO B£
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
060302
41 01 40.0 121 39 30.0 3
LAKE 8RITTON
06089 CALIFORNIA
140991
11EPALES
0049 FEET
2111202
DEPTH CLASS 00
DATE
FROM
TO
75/03/26
75/07/14
75/11/03
00665 32217 00031
TIME DEPTH PHOS-TOT CriLRPHYL INCDT LT
OF A REMNINlG
DAY FEET
14
14
14
14
14
10
10
10
10
10
14
14
14
14
35
35
35
35
35
45
45
45
45
45
10
10
10
10
0000
0005
0015
0030
0045
0000
0005
0015
0022
0038
0000
0005
0019
0036
MG/L P
0
0
0
0
0
0
9
0
0
0
0
0
0
0
.062
.051
.085
.085
.Od4
.071
.064
.065
.062
.057
.064
.065
.061
.064
UG/L PERCENT
1.8
12.2
3.5
-------
STORET RETRIEVAL DATE 76/09/24
DATE
FROM
TO
75/03/26
75/07/14
75/11/03
TIME
OF
DAY
15 ?0
15 20
15 20
15 20
10 10
10 10
10 10
10 10
14 30
14 30
14 30
14 30
DEPTH
FEET
0000
0005
0015
0026
0000
0005
0015
0023
0000
0005
0019
0025
00010
WATER
TEMP
CENT
6.5
6.5
6.5
6.4
19.4
18.9
18.6
18.1
12.2
12.0
11.9
11.9
00300
DO
HG/L
10.6
10.7
10.4
10.2
11.0
9.4
8.8
8.0
9.6
10.0
10.0
10.0
00077 00094
TRANSP CNDUCTVY
SECCHI FIELD
INCHES MICROMHO
12
90
341
150
146
146
143
136
134
131
99
99
99
97
060303
41 00 50.0 121 36 37.0 3
LAKE 8RITTON
06089 CALIFORNIA
140991
11EPALES
0030 FEET
0
00400 00410
PH T ALK
CAC03
SU MG/L
8.60
8.20
8.20
8.10
8.80
8. dO
8.70
8.50
8.10
8.10
8.00
8.00
71
72
70
71
76
76
74
76
74
72
74
76
DEPTH
2111202
CLASS 00
00610
NH3-N
TOTAL
MG/L
0.050
0.040
0.050
0.040
0.030
0.020K
0.020
0.030
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.500
0.400
0.300
0.200K
0.500
0.200
0.200
0.200
0.200K
0.200K
0.200K
0.200K
00630
N02&N03
N-TOTAL
MG/L
0.110
0.120
0.120
0.110
0.020K
0.020K
0.020
0.030
0.100
0.100
0.100
0.090
00671
PHOS-DIS
ORTHO
MG/L P
0.063
0.057
0.048
0.064
0.040
0.047
0.04H
0.054
0.049
0.050
0.051
0.051
K VALUE KNOrtN TO BE
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/09/24
060303
41 00 50.0 121 36 37.0 3
LAKE 6RITTON
06089 CALIFORNIA
140991
11EPALES 2111202
0030 FEET DEPTH CLASS 00
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FROM OF A
TO DAY FEET MG/L P UG/L
75/03/26 15 ?0 0000 0.097 1.9
15 20 0005 0.095
15 20 0015 0.097
15 20 0026 0.096
75/07/14 10 10 0000 0.030 4.2
10 10 0005 0.076
10 10 0015 0.075
10 10 0028 0.082
75/11/03 14 30 0000 0.066 2.3
14 30 0005 0.067
14 30 0019 0.066
14 30 0025 0.077
00031
INCDT LT
REMNING
PERCENT
-------
APPENDIX E
TRIBUTARY DATA
-------
STORET RETRIEVAL DATE 76/09/34
DATE
FROM
TO
74/11/16
74/12/16
75/01/18
75/05/03
75/08/01
75/10/04
TIME
OF
DAY
14 00
14 50
11 05
11 30
12 30
FEET
0603A1
41 01 15.0 121 40 30.0 4
PIT RIVE«
06 15 PONOOSA
0/LAKE BhilTTON 140991
bNK bELO PIT«3 DAM .3 M E OF CAMP SHASTA
11EPALES 2111204
0000 FEET DEPTH CLASS 00
00630
N02&N03
N-TOTAL
MG/L
0.184
0.208
0.175
0.055
0.010
0.015
00625
TOT KJEL
N
MG/L
0.400
0.700
0.800
1.900
0.300
0.200
00610
NH3-N
TOTAL
MG/L
0.030
0.018
0.030
0.035
0.015
0.010
00671
PHOS-DIS
ORTHO
MG/L P
0.065
0.070
0.045
0.040
0.035
00665
PHOS-TOT
MG/L P
0.065
0.070
0.070
0.110
0.070
0.070
-------
STORET RETRIEVAL DATE 76/09/24
0603A2
40 58 05.0 121 32 45.0 4
PIT RIVER
06 15 BURNEY
T/LAKE BRITTOM 140991
RT 299 BRt)G 9.8 MI NE OF 8URNEY
11EPALE5 2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/11/16
74/12/16
75/01/18
75/02/08
75/03/29
75/05/03
75/08/01
75/10/04
TIME DEPTH
OF
DAY FEET
11 20
11 10
09 40
14 05
12 36
09 00
11 10
00630
N02&N03
N-TOTAL
MG/L
0.096
0.136
O.ltO
0.150
0.100
0.065
0.050
0.065
00625
TOT KJEL
N
MG/L
0.100
0.400
1.100
O.R50
0.700
1.600
0.950
0.700
00610
NH3-N
TOTAL
MG/L
0.020
0.031
0.05C
0.050
0.035
D.035
0.015
0.030
00671
PHOS-DIS
OPTHO
MG/L P
0.055
0.055
0.050
0.050
0.050
0.045
0.055
0.04C
00665
PHOS-TOT
MG/L P
0.060
0.065
0.060
0.030
0.090
0.1 2C
0.070
0.060
-------
STORE! RETRIEVAL DATE 76/09/24
0603ril
41 02 35.0 121 40 33.0 4
CLARK CREEK
06 15 PONDOSA
T/LAKE BRITTON 140991
bNK 50 FT Dn/NSTRM FRM 8ROG 3 M WSW RT
11EPALES 3111204
0000 FEET DEPTH CLASS 00
69
DATE TIME DEPTH N026.N03
FROM or
TO DAY FEET
74/11/16 12 40
74/12/16 14 00
75/01/1B 10 20
75/02/08 11 40
75/03/29 13 40
75/05/03 10 15
75/08/01
75/10/04 12 15
0630
6.N03
OTAL
G/L
0.008
0.008
0.010
0.025
0.015
0.020
0.005
0.010
00625
TOT KJEL
N
MG/L
0.100
0.550
1.100
0.300
0.050K
0.100
0.100K
00610
NH3-N
TOTAL
MG/L
0.05C
0.015
0.030
0.020
J. 045
0.020
0.020
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.030
0.030
0.025
0.030
0.010
0.015
0.010
0.030
00665
PHOS-TOT
MG/L P
0.030
O.G30
0.03C
0.050
0.020
0.020
0.050
K VALUE KNOrtN TO BE
LESS THAN INDICATED
-------
STOKET RETRIEVAL DATE 76/09/24
DATE TIME DEPTH N026.N03
FROM OF
TO DAY FEET
1/16 12 00
74/12/lb 13 20
75/01/18 10 40
75/02/08 12 00
75/03/29 13 00
75/05/03 12 00
75/08/01
75/10/04 11 30
0603C1
<»1 01 00.0 121 39 05.0 4
bURNEY CREEK
06 15 PONDOSA
T/LAKE BRITTON 140991
FOOT BRDG IV MCARTHUR-eUWNEY FLS MEM
IIE^ALES 2111204
0000 FEET DEPTH CLASS 00
0630
6.N03
OTAL
G/L
0.112
0.104
0.095
0.065
0.035
0.055
0.095
0.120
00625
TOT KJEL
N
MG/L
0.500
0.500
1.450
0.550
0.500
0.100
3.000
0.700
00610
NH3-N
TOTAL
MG/L
0.105
0.009
0.020
0.040
0.045
0.010
0.035
G.020
00671
PHOS-DIS
ORTHO
MG/L P
0.030
0.030
0.025
0.025
0.010
0.020
0.020
0.030
00665
PHOS-TOT
MG/L P
0.03C
0.030
0.030
0.020
0.070
0.040
0.040
-------
STORET RETRIEVAL DATE 76/09/34
DATE TIME DEPTH N02&N03
FROM OF
TO DAY FEET
74/11/16 11 00
74/12/16 11 00
75/01/18 09 30
75/02/08 11 00
75/03/29 12 20
75/05/03 08 30
75/08/01
75/10/04 11 00
060301
40 58 35.0 121 33 25.0 4
HAT CREEK
06 15 BU*NEY
T/LAKE BrflTTON 140991
RT 299 BRDG 9 MI NE OF BURNEY
11EPALES 2111204
0000 FEET DEPTH CLASS 00
0630
S.N03
OTAL
G/L
0.120
0.116
0.110
0.125
0.070
0.035
0.030
0.120
00625
TOT KJEL
N
MG/L
0.100
0.100
1.150
0.650
0.200
0.050K
0.300
0.100K
00610
NH3-N
TOTAL
MG/L
0.030
0.018
0.025
0.055
0.040
0.015
0.010
0.020
00671
PHOS-DIS
ORTHO
MG/L P
0,065
0.060
0.060
0,072
0.060
0.055
0.050
0,055
00665
PHOS-TOT
MG/L P
0.065
0.070
0.070
0.082
0.060
0.100
0.070
0.080
K VALUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
0603E1
4i 02 ^0.0 121 37 50.0 4
CLArTON CREEK
06 15 PONDOSA
T/LAKE BRITTON 140991
H*Y 89 BRDG 14 MI N OF BURNEY
11EPALES 2111304
0000 FEET DEPTH CLASS 00
DATE TIME DEPTH N03&N03
FROM OF
TO DAY FEET
74/11/16 13 20
74/12/16 13 40
75/01/18 10 00
75/02/08 11 30
75/03/29 13 30
75/05/03 09 45
75/08/01
75/10/04 13 00
0630
S.N03
OTAL
G/L
0.008
0.008
0.005
0.060
0.015
0.010
0.015
0.005
00625
TOT KJEL
N
MG/L
1.600
0.675
1.050
0.700
0.100
0.150
4.600
0.200
00610
NH3-N
TOTAL
MG/L
0.170
0.015
0.030
0.045
0.040
0.010
0.080
0.030
00671
PHOS-DIS
ORTHO
MG/L P
0.010
0.010
0.005
0.010
0.005K
0.005
0.005
0.005K
00665
PHOS-TOT
MG/L P
0.010
0.010
0.020
0.030
0.010K
0.040
0.040
0.030
K VALUE KNOWN TO BE
LESS THAN INDICATED
------- |