10257550 WHITEWATER RIVER AT WINDY POINT, NEAR WHITE WATER, CA
LOCATION.-Lat 33°53'56", long 116°37'13", in SW 1/4 NE 1/4 sec.24, T.3 S., R.3 E., Riverside County,
Hydrologic Unit 18100200, on right bank, 200 ft north of Highway 111, 2.0 mi southeast of White Water, and 3.8 mi
east of the junction of Highway 111 and Interstate 10.
DRAINAGE AREA.-264 mi2.
PERIOD OF RECORD.-October 1984 to September 1987, October 1989 to current year. Discharge measurements only,
October 1987 to September 1989. Discharge measurements for the period July 1982 to September 1984 available in
files of the U.S. Geological Survey.
REVISED RECORDS.-WDR CA-88-1: Drainage area.
GAGE.-Water-stage recorder and concrete control; auxiliary water-stage recorder on overflow channel since Jan.
23, 1992. Elevation of gage is 1,040 ft above sea level, from topographic map.
REMARKS.-Records fair except for estimated daily discharges, which are poor. Imported water is released to the
Whitewater River from the Colorado River Aqueduct at a point 2.75 mi upstream for ground-water recharge in the
upper Coachella Valley. Water is diverted out of the basin 18.5 mi upstream to powerplants in the San Gorgonio
River Basin and then to an area north of Banning for irrigation. See schematic diagram of Salton Sea Basin.
COOPERATION.-Records of diversion out of basin provided by Southern California Edison Co. Records of Colorado
River Aqueduct releases provided by Metropolitan Water District.
EXTREMES FOR PERIOD OF RECORD.-Maximum computed discharge, 2,530 ft3/s, Jan. 10, 1995, gage height,
8.32 ft, main channel, from rating curve extended above 400 ft3/s on basis of critical-depth
computation (flow in overflow channel at peak); maximum probably exceeded during flood of Jan. 16, 1993, but
discharge is unknown; no flow for several days in most years.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 386 .51 231 2.2 4.4 150 140 410 156 .00 e5.0 170
2 384 .34 226 2.3 4.2 148 139 406 273 .00 e4.8 115
3 382 .53 226 2.1 3.8 145 141 407 271 .00 e4.7 .00
4 387 .16 223 2.2 4.7 132 143 403 271 .00 e4.5 .22
5 391 .12 223 2.1 17 146 145 414 272 .00 e4.5 .55
6 390 .24 228 1.6 8.0 145 141 414 270 .00 e4.3 .00
7 386 .47 189 1.2 7.6 144 145 410 300 .00 e4.0 .00
8 381 6.5 165 1.0 5.3 195 142 401 420 .00 e4.0 .00
9 378 17 166 1.2 5.9 238 143 398 488 .00 e3.7 .26
10 382 8.6 168 1.2 14 234 148 408 487 .00 e3.4 1.2
11 387 12 167 .68 8.5 232 146 415 470 20 e3.4 1.5
12 385 10 166 1.3 5.4 234 107 420 473 34 3.4 1.2
13 379 7.1 165 .86 3.2 233 295 408 468 70 4.6 .90
14 379 3.6 69 .68 2.3 229 399 409 474 e27 4.2 .75
15 382 3.5 1.2 1.3 2.2 228 424 409 476 e13 4.2 1.4
16 388 2.7 1.4 1.8 82 227 453 412 478 e14 4.5 .70
17 394 1.9 1.3 1.7 162 225 452 416 470 e10 3.6 .24
18 388 2.5 1.3 1.3 161 226 445 413 468 e9.6 3.1 1.0
19 238 .50 2.9 .87 162 225 430 406 474 e8.9 64 1.3
20 141 .61 4.1 .39 167 224 423 401 463 e7.3 127 2.4
21 141 1.2 13 1.4 162 225 395 400 450 e6.2 163 1.5
22 59 1.4 12 2.0 165 224 418 400 279 e6.9 169 39
23 .00 .02 8.5 1.9 164 169 427 401 .00 e6.7 171 31
24 .00 1.2 4.6 1.7 161 134 420 399 .00 e6.7 170 25
25 .00 2.4 4.0 1.6 155 135 416 402 .00 e6.5 171 20
26 .38 2.5 3.1 6.4 155 134 413 401 .00 e6.3 170 17
27 .24 3.2 1.7 6.5 157 135 407 266 .00 e6.0 169 12
28 .24 11 1.0 4.0 155 136 407 .00 .00 e5.5 166 8.1
29 .17 128 2.5 4.6 --- 135 415 .00 .00 e10 166 9.5
30 .23 240 1.2 3.8 --- 132 409 .00 .00 e5.7 169 4.1
31 .64 --- .91 4.5 --- 131 --- .00 --- e5.2 170 ---
TOTAL 7509.90 469.80 2676.71 66.38 2104.5 5650 9128 10849.00 8651.00 285.50 2118.9 465.82
MEAN 242 15.7 86.3 2.14 75.2 182 304 350 288 9.21 68.4 15.5
MAX 394 240 231 6.5 167 238 453 420 488 70 171 170
MIN .00 .02 .91 .39 2.2 131 107 .00 .00 .00 3.1 .00
AC-FT 14900 932 5310 132 4170 11210 18110 21520 17160 566 4200 924
a 17170 560 5860 0 5170 14350 19850 25050 21180 0 4430 566
b 0 0 0 0 0 0 0 0 0 0 0 0
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1985 - 1999, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 151 133 107 115 127 128 153 129 152 100 108 127
MAX 596 499 477 598 595 445 316 390 516 417 378 463
(WY) 1987 1987 1987 1987 1987 1987 1986 1998 1998 1986 1986 1986
MIN .025 .000 .000 .000 3.16 3.97 .026 .000 .000 .000 .000 .000
(WY) 1992 1992 1990 1992 1991 1989 1991 1987 1987 1989 1987 1991
SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1985 - 1999
ANNUAL TOTAL 67025.53 49975.51
ANNUAL MEAN 184 137 135
HIGHEST ANNUAL MEAN 308 1986
LOWEST ANNUAL MEAN 11.9 1991
HIGHEST DAILY MEAN 555 Jun 25 488 Jun 9 2600 Jan 7
1993
LOWEST DAILY MEAN .00 Jan 26 .00 Oct 23 .00 Mar 4
1985
ANNUAL SEVEN-DAY MINIMUM .00 Aug 14 .00 Jun 23 .00 Feb 16
1986
INSTANTANEOUS PEAK FLOW 967 Jul 13 2530 Jan 10
1995
INSTANTANEOUS PEAK STAGE 6.07 Jul 13 8.32 Jan 10
1995
ANNUAL RUNOFF (AC-FT) 132900 99130 98140
10 PERCENT EXCEEDS 476 409 356
50 PERCENT EXCEEDS 141 20 55
90 PERCENT EXCEEDS .24 .24 .00
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