10257500 FALLS CREEK NEAR WHITE WATER, CA
LOCATION.-Lat 33°52'10", long 116°40'15", in SW 1/4 NE 1/4 sec.33, T.3 S., R.3 E., Riverside County,
Hydrologic Unit 18100200, on right bank, at upstream side of Desert Water Agency Diversion Dam, 0.75 mi upstream
from confluence with Snow Creek, and 4.4 mi southwest of White Water.
DRAINAGE AREA.-4.14 mi2.
PERIOD OF RECORD.-September 1922 to January 1927, January 1928 to July 1931, and October 1994 to current year.
Previous gage destroyed by flood of Aug. 29, 1931. Monthly and yearly discharges for 1922-31, published in WSP
1314. Discharge records for Falls Creek Diversion (station 10257499) since October 1994 available in files of
the U.S. Geological Survey.
GAGE.-Water-stage recorder, broad-crested weir, and crest-stage gage on creek, nonrecording flow meter on
diversion. Auxiliary gage 0.25 mi downstream with crest-stage gage and culvert control. Elevation of gage is
1,940 ft above sea level, from topographic map.
REMARKS.-Records fair. No regulation upstream from station. Diversion (station 10257499) immediately upstream
takes a varying portion of the base flow. For combined record of creek and diversion, see station 10257501.
Published record prior to 1995 represents entire flow from basin. Records for the period 1922-1931 (prior to
construction of diversion) are equivalent to those for station 10257501. Both creek only and combined flow
published beginning October 1994. Statistics for station 10257501 (combined flow) reflect equivalent total flow
from basin. See schematic diagram of Salton Sea Basin.
COOPERATION.-Records for diversion provided by Desert Water Agency.
EXTREMES FOR PERIOD OF RECORD (Combined creek and diversion).- Maximum discharge, 154 ft3/s, Jan. 10,
1995, gage height, 6.14 ft (creek gage; no diversion at peak), from rating curve extended above 6.5
ft3/s on basis of critical depth computations; maximum gage height, 6.24 ft, Feb. 14, 1998; minimum
daily, 0.10 ft3/s, Sept. 11, 1997.
EXTREMES FOR CURRENT YEAR.-Peak discharges greater than base discharge of 50 ft3/s, or maximum, from
rating curve extended as noted above:
Creek only Creek only Combined creek and diversion
Discharge Gage height Discharge
Date Time (ft3/s) (ft) (ft3/s)
Nov. 11 2015 2.2 4.38 2.2
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 1.4 .45 1.3 .53 .90 .09 .50 .89 .05 .25 .32 .34
2 1.4 .44 1.3 .20 .45 .09 .80 .77 .51 .26 .34 .38
3 1.3 .44 1.2 .20 .14 .08 .81 .66 .52 .28 .33 .40
4 1.4 .43 1.2 .20 .73 .16 .89 .40 .50 .29 .30 .38
5 1.4 .47 1.2 .20 1.1 .09 .86 .11 .51 .28 .30 .33
6 1.4 .43 1.3 .22 .99 .10 .84 .09 .44 .28 .33 .31
7 1.3 .41 .88 .20 1.0 .10 .96 .08 .19 .38 .35 .29
8 1.3 1.3 .39 .20 1.0 .10 .90 .09 .03 .73 .35 .28
9 1.3 1.4 .34 .18 .97 .09 .89 .14 .04 .65 .35 .29
10 1.3 1.4 .32 .18 .98 .10 .85 .10 .03 .49 .34 .31
11 1.3 1.6 .35 .28 .43 .09 .87 .08 .03 .49 .34 .31
12 1.3 1.5 .36 .16 .14 .09 1.3 .06 .09 .73 .33 .31
13 1.3 .83 .36 .17 .14 .08 1.1 .06 .23 .74 .30 .31
14 1.3 .49 .35 .17 .12 .08 .65 .06 .23 .80 .29 .27
15 .81 .47 .31 .17 .12 .50 .26 .08 .28 .51 .29 .26
16 .52 .47 .30 .16 .12 .82 .19 .07 .28 .43 .28 .26
17 .49 .45 .35 .16 .13 .38 .17 .04 .29 .37 .28 .29
18 .49 .47 .31 .16 .12 .11 .15 .02 .30 .37 .27 .34
19 .46 .44 .34 .16 .12 .10 .13 .01 .29 .35 .28 .32
20 .45 .42 .26 .14 .13 .09 .13 .02 .28 .33 .32 .30
21 .45 .42 .28 .63 .13 .09 .21 .02 .29 .35 .32 .31
22 .46 .41 .31 .39 .12 .08 .16 .30 .30 .34 .29 .98
23 .48 .40 .29 .14 .12 .07 .54 .51 .29 .33 .35 .77
24 .46 .35 .25 .16 .11 .08 .90 .23 .27 .32 .31 .51
25 .71 .38 .25 .77 .10 .33 .83 .06 .25 .33 .29 .40
26 .89 .37 .26 1.0 .11 .40 .44 .05 .25 .33 .31 .35
27 .51 .36 .24 .99 .11 .09 .13 .03 .27 .32 .31 .33
28 .50 1.3 .23 .48 .10 .07 .28 .14 .27 .45 .35 .31
29 .49 1.4 .23 .16 --- .05 .88 .16 .27 .49 .35 .32
30 .51 1.3 .22 .16 --- .03 .94 .03 .25 .36 .32 .32
31 .49 --- .26 .60 --- .07 --- .04 --- .32 .31 ---
TOTAL 27.87 21.00 15.54 9.52 10.73 4.70 18.56 5.40 7.83 12.95 9.80 10.88
MEAN .90 .70 .50 .31 .38 .15 .62 .17 .26 .42 .32 .36
MAX 1.4 1.6 1.3 1.0 1.1 .82 1.3 .89 .52 .80 .35 .98
MIN .45 .35 .22 .14 .10 .03 .13 .01 .03 .25 .27 .26
AC-FT 55 42 31 19 21 9.3 37 11 16 26 19 22
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1923 - 1999, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 1.14 1.38 1.75 1.82 2.26 1.97 2.04 1.87 1.41 1.01 .93 1.05
MAX 2.52 2.81 5.68 4.58 8.08 8.75 7.90 4.25 3.33 2.37 2.67 2.23
(WY) 1923 1923 1927 1995 1998 1995 1926 1926 1998 1926 1926 1926
MIN .40 .69 .50 .31 .38 .15 .15 .13 .23 .30 .24 .36
(WY) 1995 1998 1999 1999 1999 1997 1997 1997 1996 1996 1997 1999
SUMMARY STATISTICS FOR 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1923 - 1999
ANNUAL TOTAL 833.52 154.78
ANNUAL MEAN 2.28 .42 1.55
HIGHEST ANNUAL MEAN 2.77 1926
LOWEST ANNUAL MEAN .42 1999
HIGHEST DAILY MEAN 34 Feb 14 1.6 Nov 11 50 Mar 5
1995
LOWEST DAILY MEAN .01 Jan 1 .01 May 19 .00 Apr 16
1997
ANNUAL SEVEN-DAY MINIMUM .24 Dec 24 .04 May 15 .00 Apr 13
1997
INSTANTANEOUS PEAK FLOW 2.2 Nov 11 154 Jan 10
1995
INSTANTANEOUS PEAK STAGE 4.38 Nov 11 6.24 Feb 14
1998
ANNUAL RUNOFF (AC-FT) 1650 307 1120
10 PERCENT EXCEEDS 3.7 .98 2.8
50 PERCENT EXCEEDS 1.6 .32 1.2
90 PERCENT EXCEEDS .37 .09 .31
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