U.S. ENVIRONMENTAL PROTECTION AGENCY
NATIONAL EUTROPHICATION SURVEY
WORKING PAPER SERIES
REPORT
ON
BOCA RESERVOIR
NEVADA COUNTY
CALIFORNIA
EPA REGION IX
WORKING PAPER No, 740
CORVALLIS ENVIRONMENTAL RESEARCH LABORATORY - CORVALLIS, OREGON
and
ENVIRONMENTAL MONITORING & SUPPORT LABORATORY - LAS VEGAS, NEVADA
-------
REPORT
ON
BOCA RESERVOIR
NEVADA COUNTY
CALIFORNIA
EPA REGION IX
WORKING PAPER No, 740
WITH THE COOPERATION OF THE
CALIFORNIA STATE WATER RESOURCES CONTROL BOARD
AND THE
CALIFORNIA NATIONAL GUARD
JUNE, .1978
-------
CONTENTS
Pci'j
Foreword ii
List of California Study Lakes • iv
)
Lake and Drainage Area Map v
Sections
I. Conclusions 1
II. Reservoir and Drainage Basin Characteristics 3
III. Water Quality Summary 4
IV. Nutrient Loadings 9
V. Literature Reviewed 13
VI. Appendices 14
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11
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
V
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.
-------
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.
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iv
NATIONAL EUTROPHICATION SURVEY
STUDY RESERVOIRS
State of California
Name
Amador
Boca
Britton
Casitas
Crow!ey
Don Pedro
El si nore
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
Mari n
San Diego
Lake
San Luis Obispo
Shasta
Fresno
Mono
El Dorado, Placer, CA;
Carson City, Douglas,
Washoe, NV
Calaveras, Tuolumne
Mono
Mono
-------
-39'30'
Webber
,Lake
'ruckee
Independence
Lake
Stampede Reservoir
-39'25'
Map Location
120'25'
120' 20'
Sage
BOCA RESERVOIR
Tributary Sampling Site
X Lake Sampling Site
J_
_s Km.
1 Mi.
Scale
5OCX1
RESERVOIR
120'15'
120°10'
floca
Canyon Cr.
River
120'05'
-------
BOCA RESERVOIR
STORE! NO. 0602
I. CONCLUSIONS
A. Trophic Condition*:
Survey data indicate Boca Reservoir is oligotrophic.
It ranked first in overall quality when the 24 California
lakes and reservoirs sampled in 1975 were compared using a
combination if six parameters**. Two of the water bodies
had less and one the same median total phosphorus, one had
less and two had the same median orthophosphorus, none
had less but four had the same inorganic nitrogen, one had
less and one had the same mean chlorophyll eu and seven had
greater Secchi disc transparency.
Essentially no depression of dissolved oxygen occurred
at depths as great as 20.4 meters.
B. Rate-Limiting Nutrient:
The algal assay results indicate the primary productivity
of Boca Reservoir was limited by nitrogen in early June and
phosphorus in November.
The reservoir data indicate nitrogen limitation on
06/30/75 and 11/04/75.
C. Nutrient Controllability:
1. Point sources—No known municipal or industrial point
sources contributed phosphorus to Boca Reservoir during the
sampling year.
* Trophic assessment is based on levels of nutrients, dissolved oxygen, and
chlorophyll a,; phytoplankton kinds and numbers; and transparency (Allurn
et al., 1977
** See Appendix A
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the present phosphorus loading of 0.85 g/m2/yr is less
than that proposed by Vollenweider (Vbllenweider and Dillon,
1974) as a eutrbphic loading but more than his suggested
oligbtrophic loading (see page 12).
2. Non-point sburces-Nearly 88% of the total phosphorus
input to Boca Reservoir during the sampling year was contributed
by the gaged tributaries;
The East Boca Canyon Creek phosphorus export rate was
a rather high 78 kg P/km2 during the year of sampling. This
rate is 7 and 13 times higher than the rates of the other two
tributaries. The cause of the higher export rate is not known;
however, it is noted that the mean total phosphorus concen-
tration in the creek ((hOGl rfig/1) was about three times the
mean concentfatiohs in the other two streams (CL017 and
0.019 mg/1).
-------
II. RESERVOIR AND DRAINAGE BASIN CHARACTERISTICS1"
A. Morphometry'ff":
1. Surface area: 3.97 kilometers2.
2. Mean depth: 12.8 meters.
3. Maximum depth: 30.5 meters.
4. Volume: 50.820 x 106 lm3.
5. Mean hydraulic retention time: 112 days (based on outflow).
B. Tributary and Outlet:
(See Appendix C for flow data)
1. Tributaries -
Name
Little Truckee River
Dry Creek
East Boca Canyon Creek
Minor tributaries &
immediate drainage -
Drainage
area (km2)*
378.1
16.1
6.0
41.3
Totals 441.5
2. Outlet -
Little Truckee River 445.5**
C. Precipitation***:
1. Year of sampling: 58.8 centimeters.
2. Mean annual: 53.3 centimeters.
Mean flow
(m3/sec)*
5.010
0.367
0.139
0.508
6.024
5.230
t Table of metric conversions—Appendix B.
tt Dendy, 1974.
* For limits of accuracy, see Working Paper No. 175,
1973-1976".
** Includes area of reservoir.
*** See Working Paper No. 175.
.Survey Methods,
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III. WATER QUALITY SUMMARY
Boca 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 two 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 a^ analysis. The maximum depths sampled were 12.5 meters
at station 1 and 20.4 meters at station 2.
The sampling results are presented in full in Appendix D and are
summarized in the following table.
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PARAMETER
TEMP (o
DISS OXY (MG/U
CNDCTVY (MCROMCH
PH (STAND UNITS)
TOT ALK (MG/L)
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 ( 6/ 9/75)
2 SITES
RANGE MEAN MEDIAN
6.3 - 15.6 10.9 10.3
8.2 - 9.8 9.2 9.2
45. - 60. 53. 52.
7.2 - 8.1 7.9 8.0
32. - 44. 40. 44.
0.010 - 0.014 0.012 0.011
0.015 - 0.023 0.019 0.019
0.020 - 0.020 0.020 0.020
0.020 - 0.050 0.033 0.030
0.200 - 0.300 0.230 0.200
0.040 - 0.070 0.053 0.050
0.220 - 0.320 0.250 0.220
1.0 - 1.2 1.1 1.1
1.8 - 2.0 1.9 1.9
CHEMICAL CHARACTERISTICS FOR BOCA LAKE
STORET CODE 0602
2ND SAMPLING ( 6/30/75)
2 SITES
RANGE
7.0 - 13.1
8.2 -
42. -
7.5 -
36. -
0.014 - 0.027
0.002 - 0.007
0.020 - 0.020
0.020 - 0.030
0.200 - 0.400
0.040 - 0.050
0.220 - 0.420
0.9 -
3.7 -
3.1
9.6
56.
7.9
43.
027
007
020
030
400
050
420
1.0
3.8
MEAN
10.8
9.0
52.
7.8
39.
0.017
0.003
0.020
0.024
0.240
0.044
0.260
0.9
3.7
MEDIAN
11.7
9.1
54.
7.8
40.
0.016
0.003
0.020
0.020
0.200
0.040
0.220
0.9
3.7
3RD SAMPLING <11/ 4/75)
2 SITES
RANGE MEAN MEDIAN
11.6 - 12.2 11.9 11.9
8.8 - 9.4 9.1 9.2
31. - 37. 33. 33.
7.7 - 8.0 7.9 7.9
24. - 34. 30. 31.
0.009 - 0.012 0.010 0.011
0.002 - 0.002 0.002 0.002
0.020 - 0.020 0.020 0.020
0.020 - 0.020 0.020 0.020
0.200 - 0.200 0.200 0.200
0.040 - 0.040 0.040 0.040
0.220 - 0.220 0.220 0.220
2.6 - 3.5 3.0 3.0
4.0 - 4.3 4.1 4.1
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B. Biological characteristics:
1. Phytoplankton -
Sampling
Date
06/09/75
06/30/75
11/04/75
Dominant
Genera
1.
2.
3.
4.
5.
1.
2.
3.
4.
1.
2.
3.
4.
5.
Tabellaria j>p_.
Oscillatoria sp.
Chroomonas (?) sp.
Centric diatoms
Melosira sp.
Other genera
Total
Chroomonas (?) sp.
Stephanodiscus sp.
Asterionella sp.
label! aria sp.
Total
Tabellaria sjx
Fragilaria sp.
Chroomonas (?) sp.
Cryptomonas SJD.
Asterionella sp.
Total
Algal Units
per ml
120
90
90
60
60
62
482
114
57
57
28'
256
646
258
194
161
129
1,388
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2. Chlorophyll a^ -
Sampling
Date
06/09/75
06/30/75
11/04/75
Station
Number
1
2
1
2
1
2
Chlorophyll a
(yg/1)
1.2
1.0
0.9
1.0
3.5
2.6
C. Limiting Nutrient Study:
1. Autoclaved, filtered, and nutrient spiked -
a. June sample -
Ortho P
Cone, (mg/1)
Inorganic N Maximum yield
Cone, (mg/1) (mg/1-dry wt.)
Spike (mg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
b. November sample -
Spike Cmg/1)
Control
0.050 P
0.050 P + 1.0 N
1.0 N
2. Discussion -
The control y
cornutum, indicate that the potential primary productivity
of Boca Reservoir was relatively low at the times the
samples were collected (06/09/75 and 11/04/75). Also, the
0.015
0.065
0.065
0.015
Ortho P
Cone, (mg/1)
0.005
0.055
0.055
0.005
ds of the assay
0.025
0.025
1.025
1.025
Inorganic N
Cone, (mg/1)
0.030
0.030
1.030
1.030
0.8
1.2
27.9
7.2
Maximum yield
(mg/1 -dry wt. )
0.2
3.8
22.0
0.2
alga, Selenastrum capri-
-------
8
increased yield in the June sample with the addition of
only nitrogen indicates the reservoir was nitrogen limited
at that time. Conversely, in the November sample, the
increased yield when only phosphorus was added indicates
phosphorus limitation then.
The reservoir data indicate nitrogen limitation in
early June and phosphorus limitation in late June and in
November; i.e., the mean inorganic nitrogen/orthophosphorus
ratios were 3/1, 15/1, and 20/1, respectively.
-------
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 April, May and June when two samples were collected
from several of the sites. 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 deter-
mined by using a modification of a U.S. Geological Survey computer pro-
gram for calculating stream loadings*. Nutrient loads for unsampled
"minor tributaries and immediate drainage" ("II" of U.S.G.S.) were
estimated using the means of the nutrient loads, in kg/km2/year, at
stations A-2 and B-l and multiplying the means by the II area in km2.
No known wastewater treatment plants impacted Boca Reservoir dur-
ing the sampling year.
See Working Paper No. 175.
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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) -
Little Truckee River 2,310 68.3
Dry Creek 180 5.3
East Boca Canyon Creek 470 13.9
b. Minor tributaries & immediate
drainage (non-point load) - 350 10.4
c. Known municipal STP's - None
d. Septic tanks - Unknown ?
e. Known industrial - None
f. Direct precipitation* - 70_ 2.1
Total 3,380 100.0
2. Outputs -
Reservoir outlet - Little Truckee R. 2,675 kg.
3. Net annual P accumulation - 705 kg.
* See Working Paper No. 175.
-------
11
C. Annual Total Nitrogen Loading - Average Year:
1. Inputs -
kg N/ % of
Source yr total
a. Tributaries (non-point load) -
Little Truckee River 50,170 64.2
Dry Creek 5,120 6.6
East Boca Canyon Creek 9,275 11.9
b. Minor tributaries & immediate
drainage (non-point load) - 9,315 11.9
c. Known municipal STP's - None
d. Septic tanks - Unknown ?
e. Known industrial - None
f. Direct precipitation* - 4,285 5.4
Total 78,165 100.0
2. Outputs -
Reservoir outlet - Little Truckee R. 72,570 kg.
3. Net annual N accumulation - 5,595 kg.
D. Non-point Nutrient Export by Subdrainage Area:
Tributary kg P/km2/yr kg N/km2/yr
Little Truckee River 6 133
Dry Creek 11 318
East Boca Canyon Creek 78 1,546
* 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 0.85 0.18 19.7 1.4
Vollenweider phosphorus loadings
(g/m2/yr) based on mean depth and mean
hydraulic retention time of Boca Reservoir:
"Dangerous" (eutrophic loading) 1.24
"Permissible" (oligotrophic loading) 0.62
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13
V. 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.
Dendy, William B., 1974. Personal communication (waterbody in-
formation and morphometry). CA Water Res. Contr. Bd., Sacra-
mento.
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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14
VI. APPENDICES
APPENDIX A
LAKE' RANKINGS
-------
DATA TO SE USE'"' !••
LAKE
COOE
ObOl
OfcO?
0603
Ob04
06US
0606
0607
0603
Ob09
0610
0611
061*.
0615
0616
0617
061H
0619
0620
062i
0622
0623
062<*
0625
062fc
LAKE
BOCA LAKE
LAKE
CASITAS RESERVOl*
CPOWLEY LAKE
DOM PET?0 RESERVOIR
LAKE ELSINORE
FALLEN LEAr RESERVOIR
LAKE HENNESSEY
LAKE HENSHAW
IRON GATE RESEKVOIH
LOPEZ LAKE
LAKE MARY
LAKE MENDOCINO
MCASIO RESERVOIR
LOWER OTAY RESERVOIR
LAKE ^ILLSrfim
SANTA MARGARITA LAKE
SHASTA LAKE
SHAVER
SILVER LAKE
TULLOCK RESERVOIR
UPPER TdlN LAKES
LOWER TWIN LAr.ES
MED! AN
TOTAL H
0.0«-C
0.01?
0.067
0.029
0.04f-
o.on
0.469
0.007
0.027
0.138
0.18a
0.371
0.010
0.020
0.05S
0.058
0.022
0.037
0.021
0.014
0.012
0.025
0.015
0.014
MED 1 AN
0.390
0.040
0.115
0.050
0.0*5
0.060
0.120
0.040
0.060
0.070
0.690
0.090
0.040
0.050
0.345
0.180
C.060
0.070
0.060
0.060
0.055
0.060
0.040
0.040
500-
MEAN SEC
408.667
372.633
<.4d.50u
400.250
374.750
381.733
«*89.214
24.357
41b.OOO
461.000
440.333
372.000
296. OOC
436.500
482.776
447.350
466.667
400.000
381.54?
34*. 400
356.000
433.000
300.200
248.000
MEAN
22.383
1.700
4.81 1
3.192
5.600
3.564
70.572
0.786
4.525
26.783
6.217
8.658
2.550
3.100
6.633
15.933
6.339
9.122
4.087
1.700
1.800
13.378
3.340
2.900
15-
MIN oo
14.600
6.600
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
b.200
It.bOO
9.000
7.400
7.000
7.400
7.400
1 1.400
MEOI
01SS OnTi
0.020
0.003
O.U4 /
0.014
0.034
0.004
0.092
O.OOb
0.012
0.073
0.124
0.343
0.002
o.ooe
0.013
0.013
0.008
0.014
0.015
0.004
0.003
0.009
0.004
0.003
-------
Of
«Iti
LAKE
CODE LiKt NAM£
OtOl ft'-'ftOOR
060? BOCA LA
«>
10)
7)
19)
0)
23)
11)
3)
2)
D
22)
15)
6)
5)
13)
9)
14)
16)
20)
12)
16)
17)
-inn Hl(,Mf>
MEDIAN
INO'-'IJ N
<•
Vri
22
74
7t?
b4
17
87
54
33
0
26
87
70
9
13
41
33
54
41
65
54
93
d7
( 1 )
( ?2>
( 5)
( 17)
( 18)
( 11)
( 4)
( 1=»)
( 11)
( 7)
( 0)
( 6)
( 19)
( 16)
( 2)
( 3)
( 9)
( 7)
(11)
< 9)
( 15) '
< 11)
( 22.'
( 19)
500
M£iN
43
70
17
48
65
57
0
100
39
13
26
74
91
30
4
22
9
52
61
83
78
35
87
96
V«LUt.S>
StC
I 10)
< 16)
( 4)
< ID
( 15)
( 13)
( 0)
I 23)
( 9)
( 3)
< 6)
( 17)
( 21)
( 7)
( 1)
( 5)
( 2>
( 12)
( 14)
( 19)
< 18)
! 8)
< 20)
( 22)
MEAN
CHLORA
*
91
46
7C
43
61
0
100
52
4
39
26
83
74
30
13
35
22
57
96
87
17
65
78
( 2)
< 2D
I ID
( 16)
( 10)
I !•*)
( 0)
( 23)
( 12)
( D
( 9)
( 6)
( 19)
< 17)
( 7)
( 3)
( 8)
( 5)
( 13)
< 22!
( 20)
< 4)
< 15)
( Id)
Ib-
MJN
17 (
100 (
43 (
22 (
30 (
37 (
78 (
70 (
4 (
54 (
26 (
4 (
48 (
61 (
54 (
4 <
74 (
13 (
65 (
87 (
96 {
87 !
87 (
37 (
DO
4)
23)
10)
5)
7)
8)
18)
16)
0)
12)
6)
0)
11)
14)
12)
0)
17)
3)
15)
19)
22)
19)
19)
6)
MEDI AN
DISS ORTHO »>
2o
91
1 7
37
22
78
9
70
52
13
4
0
100
63
46
46
63
37
30
78
91
57
7d
91
( 6)
( 20)
! 4)
< 8)
( 5)
< 17)
( 2)
( 16)
( 12)
( 3)
< D
( 0)
( 33)
( 14)
( 10)
< 10)
< 14)
( 8)
( 7)
( 17)
( 20)
( 13)
( 17)
( 20)
INDEX
NU
134
539
164
294
266
370
104
527
249
130
104
134
505
363
169
120
27v
196
328
463
506
302
435
463
-------
S RANKED BY INDEX NUS.
RANK LAKE CODE LAKE NAME INDEX NO
I 0602 BOCA LAKF 539
2 060el FALLEN LEAF RESERVOIR 537
3 0633 SILVER LANE 506
4 0615 LAKE MARY 505
5 0625 UPPER TWIN LAKES 465
6 06?6 LOWE* TWIN LAKES 463
7 0622 SHAVER 463
a 0606 DON PEDRO RESERVOIR 370
9 0616 LAKE MENOOCINO 363
10 0621 SHASTA LAKE 326
11 0624 TULLOCK RESERVOIR 302
12 0604 CASITAS RESERVOIP 294
13 0619 LAKE PILLSBURY 379
14 0605 CROrtLEY LAKE 268
15 0609 LAKE HENNESSEY 249
16 0620 SANTA MARGARITA LAKE 196
17 0617 NICASIO RESERVOIR 169
18 0603 LAKE bRITTOM 164
19 0614 LOPEZ LAKE 134
20 0601 A'-lAOOR RESERVOIR 134
21 0610 LAKE HENSHA* 130
22 0618 LOWER OTA? 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
-------
TRIBUTARY FLOW INFORMATION FUR CALIFORNIA
04/36/78
LAKE CODE 0602 bOCA RESERVOIR
TOTAL DRAINAGE AKEA OF LAKE(SO KM)
TRIBUTARY
0602A]
0602A2
0602H1
0602C1
0602ZZ
SUri-DxAIUA'jt
U KM)
NORMALIZED FLOWS(CMb)
443.b
378.1
16.1
6.0
21.7
JAN
1.87
0.127
0.048
0.17o
FcR
2.38
1 .67
0.096
0.037
0.133
MAR
2.92
2.12
0.481
0.184
0.6bl
AKR
10.19
10.17
2.322
0.6/8
12
i.
0.
1.
MAY
.86
218
453
6/1
ju.x
10.90
10.36
0.008
0.003
0.014
JUL AUG SEP
5.41 5.55 3.51
4.25 4.11 2.72
0.006 0.003 0.003
0.003 0.0 0.0
0.011 O.OU6 0.003
OCT
3.09
5.27
0.006
0.003
0.006
NOV
1.53
0.066
0.028
0.096
DEC
1.93
1.30
0.074
0.028
0.105
MEAN
5.23
5.01
0.367
0.139
0.508
SUMMARY
Tut AL
SUM U
DRAINAGE AREA OF LAKE =
F SUB-DRAINAGE AREAS =
445.5
422.0
TOTAL FLOW IN =
TOTAL FLOW OUT =
72.
62.
09
09
MONTHLY FLOWS AND DAILY FLOrtS(CMS)
TRIHUTARY
0602A1
MONTH
11
1
2
3
4
S
6
10
11
12
1
3
4
S
h
1
Id
YEAK
74
74
MEAN FLOW DAY
73
7b
7b
7
-------
TRIBUTARY FLO* INFORMATION FOR CALIFOHNIA
04/26/78
LAKE CODE 060,?
BOCA
MEAN MONTHLY FLOWS 4NO DAILY FLOWS(CMS)
TRIBUTARY MONTH YEAH MEAN FLOW OAY
0602H1
0602C1
06022Z
11
12
1
2
3
' <*
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
3
9
10
11
12
1
?
3
4
5
6
7
H
9
10
74
f4
7b
7b
75
7b
75
7->
75
?T
7b
7b
74
74
7b
7s
7t>
75
7b
75
75
75
7b
73
/4
74
75
/D
75
^b
7b
7D
75
75
73
73
0.042
0.042
0.037
0.059
0.212
O.b'10
1.076
0.017
0.008
0.006
0.003
0.006
0.017
0.017
0.014
0.023
0.079
0.190
0.396
U.006
0.003
0.003
0.0
0.003
u.059
O.OS9
0.051
O.OH2
0.263
O.YUrt
1 .47,?
0.023
0.011
O.OOh
0.001
O.UOH
10
15
Irt
21
27
10
6
15
6
4
7
27
10
to
KLU«I OAY
0.042
0.043
FLOW DAY
FLO*
0.0
0.006
O.OOo
0.006
0.020
0.127 19
0.170 IB
0.006 21
0.003
0.003
0.003
0.142
0.224
u.003
-------
APPENDIX D
PHYSICAL and CHEMICAL DATA
-------
STORET RETRIEVAL DATE 76/09/24
060201
39 24 59.0 120 05 24.0 3
BOCA LAKE
06057 CALIFORNIA
11EPALES 760109 2111202
0046 FEET DEPTH CLASS 00
DATE
FROM
TO
75/06/09
75/06/30
75/11/04
TIME DEPTH
OF
DAY
09
09
09
09
09
11
11
11
11
15
15
15
FEET
55
55
55
55
55
07
07
07
07
10
10
10
0000
0005
0015
0031
0041
0000
0005
0015
0035
0000
0005
0020
C0010
rfATER
TEMP
CENT
14.8
14.6
10.9
7.5
6.6
13.1
13.1
13.1
10.3
12.0
12.0
12.0
~~ 00665
DATE
FROM
TO
75/06/09
75/^6/30
75/11/04
TIME
OF
DAY
09
09
09
09
09
11
11
11
11
15
15
15
55
55
DEPTH
FEET
0000
0005
55 0015
55
55
07
07
07
07
10
10
10
0031
0041
0000
0005
0015
0035
0000
0005
0020
PHOS-TOT
MG/L P
0
0
0
0
0
c
0
0
0
0
0
0
.012
.012
.011
.011
.011
.016
.016
.020
.027
.012
.011
.Oil
00300 00077 00094
DO TRANSP CNOUCTVY
SECCHI FIELD
MG/L
8
9
9
9
8
8
a
9
9
9
9
9
INCHES MICROMHO
.2 69
.4
.8
.6
.6
.2 144
.2
.0
.4
.2 168
.4
.4
59
58
52
49
48
54
54
53
55
31
31
31
32217 00031
CHLRPHYL INCDT LT
A
UG/L
1
0
3
-
REMNING
PERCENT
.2
.9
.5
00400
PH
SU
59
58
52
49
48
54
54
53
55
31
31
31
7.90
8.00
6.00
7.20
8.10
7.80
7.90
7.95
7.60
8.00
8.00
8.00
00410
T ALK
CAC03
MG/L
44
44
43
44
44
42
42
43
40
32
30
24
00610
NH3-N
TOTAL
MG/L
0.050
0.040
0.020
0.040
0.020
0.020
0.030
0.020
0.030
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.300
0.200
0.200
0.200
0.200
0.300
0.200K
0.200K
0.200K
0.200K
0.200K
0.200K
00630
N02&N03
Ni- TOTAL
MG/L
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00671
PHOS-DIS
ORTHO
MG/L P
0.018K
0.019K
0.020K
0.020K
0.018K
0.002
0.002K
0.003
0.007
0.002K
0.002K
0.002K
K VALUE KNOWN TO dE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
060302
39 2J 33.C 120 05 46.0 3
BOCA LAKE
06057 CALIFORNIA
11EPALES 760109 2111202
006ri FEET DEPTH CLASS 00
DATE TIME DEPTH
FROM OF
TO DAY FEET
75/06/09
75/06/30
75/11/04
10 25 0000
10 25 0005
10 25 0020
10 25 0041
10 25 0064
10 30 0000
10 30 0005
10 30 0015
10 30 0025
10 30 0045
10 30 0065
14 45 0000
14 45 0005
14 45 0015
14 45 0035
14 45 0067
15.6
15.4
9.7
7.4
6.3
12.5
12.3
11.2
8.7
7.1
7.0
12.2
11.9
11. H
1 1.6
11.6
9.0
9.2
9.2
9.6
9.0
9.0
9.4
8.6
9.6
9.4
9.2
9.2
9.2
9.2
8.8
8.8
00077
TRANSP
SECCHI
INCHES
78
148
156
00094
CNDUCTVY
FIELD
MIC^OMHO
60
60
51
49
45
56
55
52
51
45
42
37
33
33
33
33
60
60
51
49
45
56
55
52
51
45
42
37
33
33
33
33
8.10
8.00
8.00
8.10
7.20
7.75
7.90
7.85
7.70
7.60
7.50
7.90
8.00
7.85
7.70
7.75
44
33
32
32
35
36
38
38
36
39
40
31
31
30
30
34
00610
NH3-N
TOTAL
MG/L
0.020
0.030
0.030
0.030
0.050
0.030
0.020
0.020
0.020
0.020
0.030
0.020K
0.020K
0.020K
0.020K
0.020K
00625
TOT KJEL
N
MG/L
0.300
0.200
0.300
0.20 OK
0.200*
0.400
0.200K
0.300
0.200K
0.200K
0.200
0.200K
0.200K
0.200K
0.200K
0.200K
00630
N020N03
N-TOTAL
MG/L
0.020K
0.0 20K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020*.
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
0.020K
00071
PHOS-DIS
ORTrlO
MG/L P
0.022K
0.015
0.021K
0.016
0.023
0.004
0.003
0.002
0.004
0.003
0.003
0.002K
0.002K
0.002K
0.002K
0.002K
00665 32217
DATE TIME DEPTH PHOS-TOT CHLRPHYL
FROM OF A
TO DAY FEET MG/L » JG/L
75/06/09 10 25 0000 0.013 1.0
75/06/30 10 30 0000 0.014 1.0
10
10
10
10
10
10
10
10
10
10
10
u
14
14
14
14
25
?5
?5
25
?5
30
30
30
30
30
30
45
45
45
45
45
0000
0005
0020
0041
0064
0000
0005
0015
0025
0045
0065
0000
OCOb
OOlb
0035
0067
0.013
0.011
0.01C
0.012
0.014
0.014
0.015
0.014
0.016
0.019
0 . 0 1 8
0.009
0.011
0.009
0.010
0.011
75/11/04 U 45 0000 0.009 2.6
00031
INCDT LT
REMNING
PERCENT
E K'JOwij TO 3E:
LESS THAN INDICATED
-------
APPENDIX E
TRIBUTARY DATA
-------
STORET RETRIEVAL DATE 76/09/24
0602A1
39 23 10.0 120 05 40.0 4
LITTLE TRUCKEE RIVEK
06 7.5 BOCA
0/BOCA HtSERVOIR
SEC Wli' BRDG
11EPALES
150191
.2 HI 8ELO* BOCA DAM
2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
74/1 1/10
74/12/15
7S/C1/12
75/03/09
75/04/06
75/04/19
75/05/04
75/CS/1H
75/C6/07
75/06/21
75/07/27
75/CB/10
75/09/06
75/1G/1B
00630 00625
TIME DEPTH N026.N03 TOT KJEL
OF N-TOTAL N
DAY FEET
12
14
11
13
13
10
12
15
13
14
13
12
10
11
00
40
00
30
30
?0
30
OP
50
15
15
05
30
30
MG/L
C
0
0
0
0
0
0
0
0
0
0
0
0
0
.010
.008
.003
.005
.120
.060
.025
.015
.075
.010
.010
.020
.02s
.Olb
MG/L
0.
0.
0.
900
300
100
0.650
0.
3.
0.
0.
0.
1.
0.
0.
0.
0.
150
750
200
150
550
250
200
100
300
200
00610 00671 00665
NH3-N PHOS-DIS PHOS-TOT
TOTAL OrJTHO
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
C.
3.
a.
C20
009
012
015
015
085
010
065
255
055
045
015
0^5
015
MG/L
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
0.
p
005
005K
005
005
010
005
025
005K
010
007
005K
005K
005K
MG/L P.
0.010K
0.010K
0.010
0.020
0.030
0.030
0.010K
0.040
0.010K
0.030
0.020
U.010
0.010
0.020
K VALUE KNO«IN ro BE
LESS THAN INDICATED
-------
STORET HETRIEVAL OATE 76/09/34
0602A2
39 26 10.0 120 05 00.0 4
TRUOEE RIVER
06 7.5 BOCA
T/80CA RESERVOIR
BNK OFF STAMPEDE MEAUOwS
150191
*0 3.9 M N BOCA
0000 FEET DEPTH
2111204
CLASS 00
DATE
FROM
TJ
74/1 1/10
74/12/15
75/01/12
75/04/19
75/05/04
75/05/19
75/06/07
75/06/21
75/C7/27
75/08/10
75/09/06
75/10/19
TIME
OF
DAY
11 30
14 25
10 30
09 40
11 45
14 35
1.3 05
13 00
11 15
10 00
08 45
10 30
FEET
00630
N02\N03
N-TOTAL
MG/L
0.0*0
0.008
c.ooa
0.010
0.020
C.015
C.070
0.005
o.oio
C.020
0.010
0.075
00635
TOT KJEL
N
MG/L
0.100K
0.100K
0. IbO
0.450
0.400
0.100
0.150
1.600
0.100
0.250
0.300
U.20C
00610
NH3-N
TOTAL
MG/L
0.015
0.007
C.008
0.025
0.020
0.020
0.055
C.045
0.020
0.015
0.075
3.020
00671
PriOS-DIS
ORTriO
MG/L P
0.005
0.005K
0.005K
0.010
0.005
0.020
0.005K
0.005
0.005K
0.015
0.005
0066S
PHOS-TOT
MG/L P
0.0 10K.
0.010
0.010K
0.010*.
0.010
0.020
0.030
0.020
0.010K
0.020
0.04Q
0.010K.
K V6LUE KNOWN TO BE
LESS THAN INDICATED
-------
STORET RETRIEVAL DATE 76/09/24
060281
39 29 50.0 120 06 05.0
DRY CREEK
06 7.5 BOCA
T/BOCA RESERVOIR
UNMPKV'O RU XING 3
•11EPALES
150191
MI N OF BOCA
2111204
0000 FEET DEPTH CLASS 00
DATE
FROM
TO
7W1 1/10
74/12/15
75/07/27
75/oa/lO
75/09/06
75/10/18
TIME DEPTH
OF
UAY FEET
10 30
13 30
12 00
11 00
09 t<5
11 15
00630
N02&N03
N-TOTAL
MG/L
0.016
0.008
0.005
0.005
0.010
0.005
00625
TOT KJEL
N
MG/L
1.300
0.100
0.050
0.300
0.400
00610
NH3-N
TOTAL
*IG/L
O.C35
C.008
0.015
G.010
0.065
0.035
OC671
PHOS-DIS
OPTHO
Mt,/L P
0.010
0.011
0.010
0.010
O.OOSK
0.010
00665
PHOS-TOT
MG/L P
0.010
0.025
0.020
0.020
0.020
K VALUE KNOWN TO 8c
LESS THAN INDICATED
-------
STORE! RETRIEVAL DATE 76/09/24
DATE TIME DEPTH N02«wN03
FROM ' OF
TO DAY FEET
74/12/15
75/03/09
75/04/06
75/04/19
75/05/04
75/05/18
75/06/07
75/06/21
75/07/27
75/08/10
75/09/06
75/10/18
14
12
10
30
13 00
10 00
12 05
14 45
13 30
13 20
11 30
10 20
09 00
10 45
0602C1
39 24 20.0 120 05 05.0
E BOCA CANYON CREEK
06 7.5 BOCA
T/80CA RESERVOIR
LGHf OTV KD 8WOG 1
0000 FEET DEPTH
150191
5 MI N OF
2111204
CLASS 00
0630
!«wN03
OTAL
IG/L
0.196
0.020
0.010
0.015
0.005
0.010
0.065
0.005
0.005
0.010
0.050
0.005
00625
TOT KJEL
N
MG/L
1.050
2.600
1.200
1.600
0.300
0.900
0.300
0.40C
0.500
0.100K
0.400
00610
NH3-M
TOTAL
MG/L
0.064
1.720
0.020
C.025
L-.010
0.020
0.030
0.055
0.030
0.030
0.040
0.015
00671
PHOS-DIS
ORTHO
MG/L P
0.045
0.050
0.035
0.045
0.040
0.055
0.050
0.050
0.040
0.040
O.OOSK
0.045
C0665
PHOS-TOT
MG/L P
0.100
0.070
0.050
0.050
0.040
0.070
0.060
O.OSC
0.070
0.010
0.075
K VALUE KNOWN TO B£
LESS THAN INDICATED
------- |