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 good 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 Coachella Valley Water District (from Metropolitan Water District's monthly reports).
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 1996 TO SEPTEMBER 1997
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 255 288 284 e9.3 e7.3 153 314 138 129 137 128 .00
2 256 290 282 e9.2 e6.3 145 328 136 129 136 122 159
3 256 e287 281 e9.1 e5.0 138 293 133 130 85 135 255
4 258 e285 282 e9.0 e24 135 319 126 129 .00 134 254
5 258 e284 282 e8.8 e137 130 318 122 128 .00 117 249
6 256 289 282 e8.7 194 125 325 120 129 .00 142 255
7 254 287 289 e8.6 198 122 246 120 131 147 139 252
8 253 284 295 e8.9 179 121 192 119 128 240 137 246
9 255 282 e364 e9.5 233 121 185 120 128 237 137 176
10 252 281 e268 e8.7 257 119 183 119 127 228 133 128
11 253 279 e11 e9.3 279 116 178 118 126 238 132 125
12 249 281 e11 e11 308 100 176 116 122 237 134 126
13 255 274 e9.5 e8.0 303 122 174 118 126 240 133 126
14 254 269 e9.2 e9.5 297 121 169 89 124 241 132 126
15 255 275 e10 e9.6 294 119 166 78 86 175 132 126
16 253 272 e10 e17 290 117 164 121 148 124 96 124
17 257 277 e9.6 e16 278 119 158 134 137 121 149 123
18 258 276 e9.2 e14 274 122 153 130 138 122 147 123
19 255 273 e9.0 e15 251 122 149 131 135 121 146 123
20 264 301 e8.6 e8.3 234 122 152 135 132 122 145 124
21 267 307 e8.2 e10 253 126 148 137 131 123 145 125
22 268 239 e12 e8.2 248 121 146 133 131 107 144 127
23 269 265 e11 e7.0 249 120 139 64 130 136 141 125
24 266 283 e10 e4.1 243 121 144 .00 132 137 140 126
25 264 276 e9.4 e4.0 238 122 113 .00 134 134 140 101
26 277 275 e8.8 e107 236 121 71 .00 135 131 140 29
27 276 286 e8.5 e26 188 54 177 82 133 132 140 17
28 270 288 e11 e14 164 .00 170 139 133 131 93 14
29 274 285 e10 e13 --- .00 153 136 133 131 .00 151
30 280 281 e9.6 e11 --- .00 141 135 134 131 .00 269
31 295 --- e9.4 e8.4 --- 180 --- 133 --- 131 .00 ---
TOTAL 8112 8419 3114.0 420.2 5867.6 3454.00 5744 3382.00 3888 4375.00 3753.00 4304.00
MEAN 262 281 100 13.6 210 111 191 109 130 141 121 143
MAX 295 307 364 107 308 180 328 139 148 241 149 269
MIN 249 239 8.2 4.0 5.0 .00 71 .00 86 .00 .00 .00
AC-FT 16090 16700 6180 833 11640 6850 11390 6710 7710 8680 7440 8540
a 18430 17870 5640 2 12220 9320 11750 9180 10310 11400 9590 10530
b 110 104 74 28 18 44 129 166 64 110 93 133
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1985 - 1997, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 144 145 105 134 136 133 132 88.8 110 98.9 104 131
MAX 596 499 477 598 595 445 316 314 423 417 378 463
(WY) 1987 1987 1987 1987 1987 1987 1986 1986 1986 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 1996 CALENDAR YEAR FOR 1997 WATER YEAR WATER YEARS 1985 - 1997
ANNUAL TOTAL 60996.07 54832.80
ANNUAL MEAN 167 150 131
HIGHEST ANNUAL MEAN 308 1986
LOWEST ANNUAL MEAN 11.9 1991
HIGHEST DAILY MEAN 364 Dec 9 364 Dec 9 2600 Jan 7 1993
LOWEST DAILY MEAN .00 May 26 .00 Mar 28 .00 Mar 4 1985
ANNUAL SEVEN-DAY MINIMUM 2.6 Feb 13 8.1 Jan 19 .00 Feb 16 1986
INSTANTANEOUS PEAK FLOW (a) Dec 9 2530 Jan 10 1995
INSTANTANEOUS PEAK STAGE (a) Dec 9 8.32 Jan 10 1995
ANNUAL RUNOFF (AC-FT) 121000 108800 94550
10 PERCENT EXCEEDS 280 281 327
50 PERCENT EXCEEDS 227 134 34
90 PERCENT EXCEEDS 8.8 9.2 .00
(a) Peak flow and stage are unknown but are known to have occurred on Dec. 9.
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Last modified: Wed Mar 10 14:06:14 PST 1999