10259100 WHITEWATER RIVER AT RANCHO MIRAGE, CA

LOCATION.-Lat 33°44'58", long 116°25'19", in NW 1/4 SW 1/4 sec.12, T.5 S., R.5 E., Riverside County, Hydrologic Unit 18100200, on right bank 0.2 mi upstream from Magnesia Spring Canyon storm channel and 2.7 mi northwest of the intersection of Highways 111 and 74. 
DRAINAGE AREA.-588 mi2. 
PERIOD OF RECORD.-March 1989 to current year. 
REVISED RECORDS.-WDR CA-93-1: 1989-92(M).  WDR CA-95-1: 1993, 1993(M). 
GAGE.-Water-stage recorder, crest-stage gage, and concrete control.  Elevation of gage is 230 ft above sea level, from topographic map.  Prior to Dec. 4, 1997, at datum 10.00 ft lower.
REMARKS.-Records fair.  No regulation upstream from station.  Water diverted from tributary streams for municipal supply in vicinity of Palm Springs.  Water from the Colorado River Basin is imported for ground-water recharge and irrigation.  See schematic diagram of Salton Sea Basin. 
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 9,060 ft3/s, Jan. 7, 1993, gage height, 5.93 ft, datum then in use, from rating curve extended above 1,460 ft3/s on basis of critical depth computations; maximum gage height, 8.09 ft (present datum), Feb. 14, 1998; no flow for many days in each year. 

                  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      e.00     e.00     e.00      .00      .00      .00      .00      .00      .12      .00      .00      .00
  2      e.00     e.00     e.00      .00      .00      .00      .00      .00      .41      .00      .00      .00
  3      e.00     e.00     e.00      .00     7.2       .00      .00      .00     1.0       .00      .00      .00
  4      e.00     e.00      .00      .00      .07      .00      .00      .00      .00      .00      .00      .00
  5      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 
  6      e.00     e.00     1.1       .00     3.3       .00      .00      .00      .00      .00      .00      .00
  7      e.00     e.00      .00      .00      .27      .00      .00      .00      .00      .00      .00      .00
  8      e.00     e.00      .00      .00   115         .00      .00      .00      .00      .00      .00      .00
  9      e.00     e.00      .00     1.8       .67      .00      .00      .00      .00      .00      .00      .00
 10      e.00     e.00      .00     2.8       .00      .00      .00      .00      .00      .00      .74      .00
 
 11      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 12      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 13      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 14      e.00     e.00      .00      .00   123         .88      .00      .00      .00      .00      .00      .00
 15      e.00     e.00      .00      .00    71         .00      .00      .00      .00      .00      .00      .00
 
 16      e.00     e.00      .00      .00      .37      .00      .00      .00      .00      .00      .00      .00
 17      e.00     e.00      .00      .00     3.8       .00      .00      .00      .00      .00      .00      .00
 18      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 19      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 20      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 
 21      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 22      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 23      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 24      e.00     e.00      .00      .00     7.8       .00      .00      .00      .00      .00      .00      .00
 25      e.00     e.00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
 
 26      e.00     e.00      .00      .00      .00      .01      .00      .07      .00      .00      .00      .00
 27      e.00     e.00      .00      .00      .00      .00      .00      .60      .00      .00      .00      .00
 28      e.00     e.00      .00      .00      .00      .76      .00      .92      .00      .00      .00      .00
 29      e.00     e.00      .00      .00      ---      .00      .00      .87      .00      .00      .00      .00
 30      e.00     e.00      .00      .00      ---      .00      .00      .06      .00      .00      .00      .00
 31      e.00      ---      .00      .00      ---      .00      ---      .52      ---      .00      .00      ---
 
TOTAL    0.00     0.00     1.10     4.60   332.48     1.65     0.00     3.04     1.53     0.00     0.74     0.00
MEAN     .000     .000     .035      .15     11.9     .053     .000     .098     .051     .000     .024     .000
MAX       .00      .00      1.1      2.8      123      .88      .00      .92      1.0      .00      .74      .00
MIN       .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00      .00
AC-FT     .00      .00      2.2      9.1      659      3.3      .00      6.0      3.0      .00      1.5      .00
 
    e Estimated.


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1989 - 1998, BY WATER YEAR (WY)                                 
 
          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
MEAN     .004     .004     .036     36.5     8.20     8.37     .041     .038     .009     .005      .12      .20
MAX      .016     .021      .18      310     52.3     66.0      .21      .27     .051     .026      .78     1.30
(WY)     1993     1990     1993     1993     1993     1995     1993     1993     1998     1991     1989     1995
MIN      .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000
(WY)     1990     1991     1994     1994     1997     1990     1989     1989     1989     1989     1990     1989
 
SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1989 - 1998
 
ANNUAL TOTAL                          13.86                     345.14                                          
ANNUAL MEAN                             .038                       .95                       4.48               
HIGHEST ANNUAL MEAN                                                                         30.4            1993
LOWEST ANNUAL MEAN                                                                            .002          1996
  HIGHEST DAILY MEAN                     8.0   Sep 25             123     Feb 14            2950       Jan 16 1993
  LOWEST DAILY MEAN                       .00  Jan  1                .00  Oct  1                .00    Mar 30 1989
  ANNUAL SEVEN-DAY MINIMUM                .00  Jan  1                .00  Oct  1                .00    Mar 30 1989
  INSTANTANEOUS PEAK FLOW                                        1100     Feb 14            9060       Jan  7 1993
  INSTANTANEOUS PEAK STAGE                                          8.09  Feb 14               8.09    Feb 14 1998
ANNUAL RUNOFF (AC-FT)                 27                        685                       3250                  
10 PERCENT EXCEEDS                      .00                        .00                        .00               
50 PERCENT EXCEEDS                      .00                        .00                        .00               
90 PERCENT EXCEEDS                      .00                        .00                        .00