2000 California Hydrologic Data Report
11390500 SACRAMENTO RIVER BELOW WILKINS SLOUGH, NEAR GRIMES, CA.
LOCATION - Lat 39°00'36", long 121°49'25", in NW 1/4 NE 1/4 sec.2, T.13 N., R.1 E., Colusa County,
Hydrologic Unit 18020104, on right bank, 1,200 ft downstream from Wilkins Slough, 5.8 mi southeast
of Grimes, and at mile 62.9 upstream from Sacramento.
DRAINAGE AREA - 12,926 mi". WATER-
DISCHARGE RECORDS PERIOD OF RECORD - August 1931 to current year (prior to October 1938, low-water periods
only). Monthly discharge only for some periods, published in WSP 1315-A. Prior to October 1965,
published as "below Wilkins Slough."
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3.00 ft below sea level.
REMARKS - Records good. Natural flow of stream affected by storage reservoirs, power development, bypassing
for flood control, diversions for irrigation, and return flow from irrigated areas. When discharge
exceeds about 23,000 ft³/s, flow begins over Tisdale Weir, 1.0 mi upstream on left bank, into
Sutter Bypass. Records tabulated below do not include flow over Tisdale Weir. See schematic diagram
of lower Sacramento River Basin.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge (water years 1939.2000), 32,700 ft³/s, Feb. 20, 1986,
gage height, 52.50 ft, maximum gage height, 52.75 ft, Mar. 1, 1940; minimum daily, 645 ft³/s, Aug.
9, 1939.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1999 TO SEPTEMBER 2000
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 6100 5320 9530 7020 25300 28800 12300 10100 9200 8760 9840 7350
2 6050 5100 11400 7030 24600 28800 11700 9900 8960 8700 9670 7170
3 6040 5140 11000 6940 23600 28700 11300 10100 8410 8700 9740 7360
4 6030 5200 10700 6850 22400 28500 11000 10800 8070 8930 9750 7440
5 5990 5140 10500 6820 22700 28500 10800 10800 7960 9080 9710 7390
6 5950 5080 10300 6700 22700 28900 10700 10700 7730 9660 9260 7360
7 6010 5110 10100 6580 23600 29200 10500 11100 7280 9770 8970 7360
8 5840 5350 10000 6430 22000 28700 10200 11200 e7400 9730 8940 7220
9 5630 5710 9960 6290 19700 28400 9990 11200 e7700 9800 8980 7030
10 5510 6080 9770 6290 18600 28500 10500 10900 e7900 9860 8550 6930
11 5430 6470 9540 6350 21300 28500 11100 9790 e8000 9940 7860 6820
12 5340 7060 9510 6600 25400 28100 11200 8970 e8000 9940 7740 6830
13 5280 7290 9380 8000 27200 27500 11200 8180 8030 9810 7830 6780
14 5010 6990 9240 8140 27900 26900 11300 7700 8980 9680 7820 6620
15 4960 6790 9250 8000 29000 26400 11900 7880 9490 9870 7760 6600
16 4800 6730 9040 10300 29200 25800 11700 8180 9360 9780 7670 6850
17 4740 6750 8660 15000 28700 24700 11600 9700 9050 9740 7520 7350
18 4730 7140 8330 14500 28300 23600 13900 9900 8560 9970 7220 7130
19 4790 7680 7990 12400 28000 22400 18900 9030 8300 9930 7000 7140
20 4790 7650 7780 13400 27700 20600 18400 8840 8050 9830 6620 7440
21 4670 8660 7560 19100 27500 19800 16300 9740 7830 9800 6480 7750
22 4600 9470 7380 17500 27600 19000 14700 10700 8070 9740 6410 8030
23 4760 8620 7350 14500 27800 18100 13800 10800 7970 9700 6470 8050
24 4940 8010 7390 14700 28700 17000 13300 10600 7690 9660 6590 7700
25 5020 7670 7420 20800 28700 16000 12600 10300 7710 9720 6350 7550
26 4970 7430 7420 23600 28200 15100 11900 10600 7930 9690 6360 7520
27 4860 7220 7340 23300 28200 14500 11000 9690 8130 9660 6510 7450
28 4890 7100 7310 22100 28800 14000 10300 9460 8200 9880 6640 7060
29 5260 7590 7270 20300 29000 13700 9880 9550 8410 10200 6970 6560
30 5850 8090 7140 20400 --- 13300 9870 9550 8580 10100 7190 6260
31 5550 --- 7040 23300 --- 12700 --- 9300 --- 9980 7420 ---
TOTAL 164390 203640 272600 389240 752400 714700 363840 305260 246950 299610 241840 216100
MEAN 5303 6788 8794 12560 25940 23050 12130 9847 8232 9665 7801 7203
MAX 6100 9470 11400 23600 29200 29200 18900 11200 9490 10200 9840 8050
MIN 4600 5080 7040 6290 18600 12700 9870 7700 7280 8700 6350 6260
AC-FT 326100 403900 540700 772100 1492000 1418000 721700 605500 489800 594300 479700 428600
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1946 - 2000, BY WATER YEAR (WY)
MEAN 6540 8516 12380 15040 17020 15600 11560 9455 7895 7437 7309 7237
MAX 11800 20510 27430 27310 29090 29490 24920 23110 20670 12500 10940 10620
(WY) 1958 1974 1984 1997 1998 1983 1982 1983 1998 1998 1998 1967
MIN 3330 3839 4103 5281 5012 5152 4201 3397 3451 3784 4086 4065
(WY) 1978 1993 1977 1991 1991 1977 1994 1992 1992 1992 1947 1977
SUMMARY STATISTICS FOR 1999 CALENDAR YEAR FOR 2000 WATER YEAR WATER YEARS 1946 - 2000
ANNUAL TOTAL 4061640 4170570
ANNUAL MEAN 11130 11400 10470
HIGHEST ANNUAL MEAN 17980 1983
LOWEST ANNUAL MEAN 5109 1977
HIGHEST DAILY MEAN 28200 Feb 11 29200 Feb 16 32600 Feb 20 1986
LOWEST DAILY MEAN 4600 Oct 22 4600 Oct 22 2720 May 7 1992
ANNUAL SEVEN-DAY MINIMUM 4730 Oct 17 4730 Oct 17 2880 Oct 12 1977
INSTANTANEOUS PEAK FLOW 29400 Feb 16 32700 Feb 20 1986
INSTANTANEOUS PEAK STAGE 49.86 Feb 16 52.68 Jan 4 1997
ANNUAL RUNOFF (AC-FT) 8056000 8272000 7584000
10 PERCENT EXCEEDS 24800 24600 22300
50 PERCENT EXCEEDS 8130 9040 8030
90 PERCENT EXCEEDS 5570 6020 5040
e Estimated.
[an error occurred while processing this directive]