1998 California Hydrologic Data Report
10336660 BLACKWOOD CREEK NEAR TAHOE CITY, CA
- 1998 WY
10336660 BLACKWOOD CREEK NEAR TAHOE CITY, CA
LOCATION.-Lat 39°06'27", long 120°09'40", in NW 1/4 NE 1/4 sec.36, T.15 N., R.16 E., Placer County, Hydrologic Unit 16050101, on right bank 300 ft upstream from bridge on State Highway 89, 1,000 ft upstream from Lake Tahoe, and 4.6 mi south of Tahoe City.
DRAINAGE AREA.-11.2 mi2.
WATER-DISCHARGE RECORDS
PERIOD OF RECORD.-October 1960 to current year.
GAGE.-Water-stage recorder and crest-stage gage. Datum of gage is 6,234.59 ft above sea level. Oct. 1, 1960, to Sept. 30, 1964, at datum 10.25 ft lower and Oct. 1, 1964, to Aug. 27, 1970, at datum 12 ft lower, at site 400 ft downstream.
REMARKS.-Records fair, including estimated daily discharges. No known diversion or regulation upstream from station. See schematic diagram of Truckee River Basin.
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 2,940 ft3/s, Jan. 1, 1997, gage height, 9.82 ft; maximum gage height, 9.90 ft, site and datum then in use, Dec. 22, 1964; minimum daily, 0.50 ft3/s, Sept. 24, 1968.
EXTREMES FOR CURRENT YEAR.-Peak discharges greater than base discharge of 200 ft3/s, or maximum:
Discharge Gage height Discharge Gage height
Date Time (ft3/s) (ft) Date Time (ft3/s) (ft)
Mar. 24 0515 390 2.89 June 7 0045 432 3.20
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 1.3 2.7 4.6 e4.4 e15 11 50 138 141 166 27 4.9
2 2.0 2.9 4.4 e4.4 e15 11 54 150 168 173 25 4.8
3 1.8 2.9 4.3 e4.4 e15 10 49 142 167 163 23 4.7
4 1.8 2.8 4.4 e4.4 e15 10 43 132 164 156 21 4.6
5 1.8 3.0 4.6 e4.4 e14 10 42 125 159 178 20 4.9
6 2.1 3.2 4.6 e4.4 e14 9.3 38 121 181 157 16 4.9
7 2.3 2.9 5.5 e4.4 e14 e8.8 34 112 315 145 14 4.6
8 2.3 2.9 6.1 e4.4 e14 8.3 30 125 266 143 13 4.6
9 4.7 3.0 5.3 e4.2 e14 8.2 28 142 246 140 12 6.2
10 3.4 2.9 5.1 e4.2 e14 8.5 28 118 242 132 11 6.1
11 2.9 3.0 5.4 e4.2 e14 9.2 27 102 235 117 10 5.0
12 2.5 3.1 e5.2 e12 e13 e9.4 26 92 256 102 10 5.0
13 2.3 3.2 5.1 e8.0 e13 9.6 27 81 299 111 10 5.0
14 2.0 3.2 5.1 e6.0 e13 9.8 25 72 286 107 11 4.8
15 1.8 3.5 e5.0 e30 e13 12 24 74 260 96 11 4.7
16 1.7 3.3 5.0 e40 e13 14 24 82 266 103 9.4 4.6
17 1.7 3.6 4.8 e60 e13 16 25 72 222 99 8.6 4.5
18 1.7 3.6 4.5 54 e12 17 26 72 226 90 7.3 4.2
19 2.0 4.4 e4.5 41 e12 19 31 86 255 84 7.0 4.1
20 2.2 3.3 e4.5 33 e12 27 40 104 254 75 6.7 3.9
21 2.2 3.2 e4.4 30 12 31 65 92 268 67 6.8 3.8
22 2.4 3.3 e4.2 29 e11 74 86 95 240 67 6.4 3.8
23 2.7 3.6 e4.2 26 e11 163 99 102 200 59 6.3 3.6
24 2.9 3.8 e4.4 23 e11 264 87 113 183 58 6.0 3.7
25 2.7 4.1 e4.6 23 e11 148 82 158 200 55 5.8 3.6
26 2.7 5.7 e4.8 18 11 107 78 121 195 47 5.5 3.7
27 2.5 4.5 e4.8 19 11 91 87 96 176 41 5.3 3.8
28 2.6 4.6 e4.8 18 11 79 96 88 184 40 5.3 3.8
29 2.7 4.4 e4.6 19 --- 69 111 87 193 37 5.5 3.7
30 2.7 4.6 e4.6 17 --- 65 128 85 182 33 5.1 3.7
31 2.7 --- e4.6 15 --- 58 --- 105 --- 30 5.0 ---
TOTAL 73.1 105.2 148.0 568.8 361 1387.1 1590 3284 6629 3071 336.0 133.3
MEAN 2.36 3.51 4.77 18.3 12.9 44.7 53.0 106 221 99.1 10.8 4.44
MAX 4.7 5.7 6.1 60 15 264 128 158 315 178 27 6.2
MIN 1.3 2.7 4.2 4.2 11 8.2 24 72 141 30 5.0 3.6
AC-FT 145 209 294 1130 716 2750 3150 6510 13150 6090 666 264
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1961 - 1998, BY WATER YEAR (WY)
MEAN 4.97 13.1 20.8 26.5 22.1 31.2 61.0 128 103 30.2 5.92 2.92
MAX 28.1 94.8 157 201 116 122 124 312 320 149 36.1 10.3
(WY) 1963 1984 1965 1997 1986 1986 1989 1969 1983 1983 1983 1982
MIN 1.31 1.68 1.90 2.00 2.27 3.82 13.6 29.7 7.20 3.11 1.51 1.21
(WY) 1978 1978 1977 1991 1991 1977 1975 1977 1992 1987 1994 1992
SUMMARY STATISTICS FOR 1997 CALENDAR YEAR FOR 1998 WATER YEAR WATER YEARS 1961 - 1998
ANNUAL TOTAL 18609.0 17686.5
ANNUAL MEAN 51.0 48.5 37.5
HIGHEST ANNUAL MEAN 73.4 1982
LOWEST ANNUAL MEAN 8.71 1977
HIGHEST DAILY MEAN 2000 Jan 1 315 Jun 7 2000 Jan 1 1997
LOWEST DAILY MEAN 1.0 Sep 28 1.3 Oct 1 .50 Sep 24 1968
ANNUAL SEVEN-DAY MINIMUM 1.1 Sep 23 1.9 Oct 1 .54 Sep 23 1968
INSTANTANEOUS PEAK FLOW 432 Jun 7 2940 Jan 1 1997
INSTANTANEOUS PEAK STAGE 3.20 Jun 7 9.90 Dec 22 1964
ANNUAL RUNOFF (AC-FT) 36910 35080 27180
10 PERCENT EXCEEDS 131 157 108
50 PERCENT EXCEEDS 19 12 10
90 PERCENT EXCEEDS 2.3 3.0 2.1
10336660 BLACKWOOD CREEK NEAR TAHOE CITY, CA-Continued
- 1998 WY
10336660 BLACKWOOD CREEK NEAR TAHOE CITY, CA-Continued
WATER-QUALITY RECORDS
PERIOD OF RECORD.-Water years 1975-78, 1980 to current year.
PERIOD OF DAILY RECORD.-
SPECIFIC CONDUCTANCE: December 1980 to September 1983.
WATER TEMPERATURE: October 1974 to June 1978 (1977-78 storm season only), October 1979 to September 1992.
SUSPENDED-SEDIMENT DISCHARGE: October 1974 to June 1978 (1977-78 storm season only), October 1979 to September 1992.
REMARKS.-In October 1992, station was incorporated into the expanded Lake Tahoe Interagency Monitoring Program to monitor tributary contributions of nutrients and sediment to Lake Tahoe. These data are reviewed and provided by the Nevada District Office, U.S. Geological Survey.
WATER-QUALITY DATA, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
DIS- PH BARO- OXYGEN,
CHARGE, SPE- WATER METRIC DIS-
INST. CIFIC WHOLE PRES- SOLVED
CUBIC CON- FIELD TEMPER- TEMPER- SURE OXYGEN, (PER-
FEET DUCT- (STAND- ATURE ATURE (MM DIS- CENT
DATE TIME PER ANCE ARD AIR WATER OF SOLVED SATUR-
SECOND (US/CM) UNITS) (DEG C) (DEG C) HG) (MG/L) ATION)
(00061) (00095) (00400) (00020) (00010) (00025) (00300) (00301)
OCT
02... 1135 2.5 73 -- 7.5 10.5 -- 8.6 98
09... 1345 5.3 73 -- 5.0 8.0 -- -- --
29... 1555 2.8 72 -- 10.0 8.0 -- 9.4 99
NOV
29... 1415 4.6 68 -- 3.0 3.0 -- 10.6 100
DEC
31... 1440 4.6 62 -- 6.0 2.0 -- 11.1 100
JAN
15... 1635 30 49 -- -- 1.0 -- -- --
16... 1650 40 31 -- 3.5 1.0 -- 11.0 97
17... 1630 60 29 -- 2.5 1.0 -- -- --
FEB
24... 1515 11 55 -- -2.0 .0 -- -- --
MAR
22... 1550 97 39 -- 5.0 1.0 -- -- --
23... 1735 173 40 -- 1.0 .5 -- -- --
23... 2335 233 37 -- .0 .0 -- -- --
24... 1645 219 39 -- 1.0 .5 -- -- --
30... 1705 67 51 -- .0 3.5 -- 10.3 98
APR
22... 1755 99 43 -- 5.5 4.0 -- 10.5 101
30... 1945 151 37 -- 3.5 2.0 -- -- --
MAY
12... 1300 92 39 7.0 1.5 2.5 592 10.5 99
15... 1640 78 48 -- 8.5 7.5 -- 9.4 100
25... 1410 166 37 -- 2.5 4.0 -- 10.2 99
29... 1635 82 45 -- 1.5 5.5 -- -- --
JUN
01... 2025 190 34 -- 7.0 3.0 -- 11.0 103
06... 2330 268 31 -- 5.0 2.0 -- -- --
07... 1800 341 30 -- 7.0 4.5 -- -- --
12... 1445 228 33 -- 14.0 8.0 -- 9.5 101
12... 2230 360 29 -- 6.5 3.0 -- -- --
20... 0650 206 30 -- 3.5 3.0 -- -- --
26... 1920 228 27 -- 13.0 6.0 -- 10.0 101
JUL
02... 1940 244 27 -- 14.5 7.5 -- -- --
13... 1445 110 31 -- 24.5 13.0 -- 8.4 100
AUG
11... 1625 11 50 -- 25.0 19.0 -- 7.3 100
SEP
09... 2020 7.5 59 -- 8.0 11.5 -- -- --
18... 1535 4.2 64 -- 14.0 14.5 -- 8.1 100
10336660 BLACKWOOD CREEK NEAR TAHOE CITY, CA-Continued
WATER-QUALITY DATA, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
NITRO- NITRO- NITRO- PHOS- IRON, SEDI-
GEN, GEN, GEN,AM- PHORUS BIO. MENT,
NO2+NO3 AMMONIA MONIA + PHOS- ORTHO, REACT- SEDI- DIS-
DIS- DIS- ORGANIC PHORUS DIS- IVE MENT, CHARGE,
SOLVED SOLVED TOTAL TOTAL SOLVED TOTAL SUS- SUS-
DATE (MG/L (MG/L (MG/L (MG/L (MG/L (UG/L PENDED PENDED
AS N) AS N) AS N) AS P) AS P) AS FE) (MG/L) (T/DAY)
(00631) (00608) (00625) (00665) (00671) (46568) (80154) (80155)
OCT
02... .004 <.001 .04 .056 .009 137 <1 --
09... .017 .003 .09 .027 .010 184 2 .03
29... .004 .001 .04 .019 .008 150 4 .03
NOV
29... .013 <.001 .03 .014 .006 112 5 .06
DEC
31... .005 .001 .04 .013 .005 102 4 .05
JAN
15... .042 <.001 .20 .071 .002 1620 39 3.2
16... .070 .001 .31 .057 .005 874 37 4.0
17... .091 .001 .17 .054 .005 324 25 4.1
FEB
24... .012 .001 .04 .027 .004 276 11 .33
MAR
22... .001 .118 .26 .135 .004 1140 127 33
23... .063 .004 .13 .037 .005 449 32 15
23... .053 .006 .47 .233 .005 3070 271 170
24... .051 .006 .22 .136 .007 1960 205 121
30... .050 .001 .52 .012 .005 123 7 1.3
APR
22... .039 .001 .08 .037 .005 577 41 11
30... .039 .002 .22 .065 .005 1190 136 55
MAY
12... .024 .004 .04 .020 .003 130 7 1.7
15... .006 .002 .21 .022 .001 219 10 2.1
25... .027 .003 .09 .053 .003 471 42 19
29... .017 .004 .05 .025 .004 190 3 .66
JUN
01... .025 .002 .13 .069 .004 897 94 48
06... .026 .005 .75 .329 .005 5790 550 398
07... .028 .001 .65 .339 .006 5270 520 479
12... .018 <.001 .09 .059 .004 677 81 50
12... .020 .001 .20 .124 .005 1670 175 170
20... .019 .002 .08 .048 .004 400 49 27
26... .015 <.001 .14 .051 .004 504 50 31
JUL
02... .010 <.001 .08 .043 .002 373 34 22
13... .006 <.001 .04 .051 .002 147 10 3.0
AUG
11... .007 .004 .06 .032 .005 98 4 .12
SEP
09... .023 .002 .13 .031 .008 348 13 .26
18... .002 <.001 .07 .016 .005 204 2 .02
1998 California Hydrologic Data Report Index
USGS Water Resources of California
Contact:
webmaster@maildcascr.wr.usgs.gov
Last modified: Wed Aug 4 09:40:26 PDT 1999