10257600 MISSION CREEK NEAR DESERT HOT SPRINGS, CA

LOCATION.-Lat 34°00'40", long 116°37'38", in NE 1/4 SW 1/4 sec.12, T.2 S., R.3 E., Riverside County, Hydrologic Unit 18100200, in Mission Creek Indian Reservation, 0.6 mi downstream from West Fork, and 6.8 mi northwest of Desert Hot Springs. 
DRAINAGE AREA.-35.7 mi2. 
PERIOD OF RECORD.-October 1967 to current year. 
GAGE.-Water-stage recorder, crest-stage gage, and concrete scour limiter since November 1988.  Elevation of gage is 2,400 ft above sea level, from topographic map. 
REMARKS.-Records good.  Slight regulation of low flow by two small dams with a combined capacity of about 3 acre-ft, 2 mi upstream from station.  See schematic diagram of Salton Sea Basin. 
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 1,750 ft3/s, Aug. 17, 1983, gage height, 3.33 ft on basis of slope-conveyance study of peak flow; maximum gage height, 6.40 ft, Jan. 25, 1969; maximum gage height since November 1988, 5.80 ft from crest-stage gage, Jan. 16, 1993, discharge not determined; no flow for many days in most years. 
EXTREMES FOR CURRENT YEAR.-Peak discharges greater than base discharge of 50 ft3/s, or maximum, from rating curve extended above 36 ft3/s on basis of critical depth computations: 
  			Discharge	Gage height			Discharge	Gage height
  	Date	Time	(ft3/s)	(ft)	Date	Time	(ft3/s)	(ft)
  	Feb. 8	0345	17	2.07

                  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       .23      .22      .36      .45      .68      4.9      3.6      4.4      3.2     1.4       .87      2.4
  2       .23      .20      .34      .47      .70      4.3      3.6      4.5      3.0     1.4       .81      2.3
  3       .24      .21      .34      .48     1.1       3.7      3.7      4.5      3.0     1.4       .76      2.4
  4       .24      .21      .35      .48     1.2       3.2      3.8      4.6      3.1     1.5       .70      2.5
  5       .23      .21      .35      .49     1.0       3.1      3.9      5.1      2.9     1.4       .67      2.4
 
  6       .23      .22      .79      .46     2.2       3.4      3.6      4.9      2.9     1.4       .75      2.3
  7       .29      .23     1.2       .46     2.1       3.3      3.5      4.6      3.0     1.3       .74      2.3
  8       .31      .24     1.2       .45     7.7       3.3      4.1      4.2      2.9     1.3       .80      2.2
  9       .30      .25      .83      .71     3.7       3.4      4.1      4.0      2.7     1.2       .90      2.0
 10       .28      .29      .66     1.0      3.1       3.8      4.1      3.9      2.6     1.2      1.2       2.0
 
 11       .30      .29      .61      .74     2.8       4.2      3.8      3.8      2.6     1.1       .94      2.0
 12       .31      .30      .52      .63     2.6       4.2      3.8      3.9      2.6     1.1       .97      2.0
 13       .30      .38      .52      .51     2.6       4.2      3.8      5.0      2.6     1.1      1.3       2.0
 14       .29      .37      .49      .50     5.3       4.0      3.9      4.3      2.5     1.1      1.3       1.9
 15       .26      .35      .49      .48     5.0       4.0      4.0      3.9      2.3     1.0      1.3       1.7
 
 16       .24      .35      .47      .46     2.8       4.1      4.2      3.6      2.3      .88     1.3       1.7
 17       .23      .33      .47      .45     3.2       4.0      4.3      3.5      2.3      .88     1.3       1.6
 18       .22      .33      .48      .46     2.9       3.9      4.3      3.6      2.1      .95     1.3       1.6
 19       .22      .32      .45      .47     3.2       4.0      4.2      3.4      2.1     1.0      1.3       1.6
 20       .24      .31      .47      .51     3.2       4.1      4.2      3.4      2.1     1.1      1.2       1.6
 
 21       .26      .31      .65      .50     3.7       4.3      4.2      3.5      2.0     1.1      1.2       1.8
 22       .25      .30      .69      .53     4.2       4.2      3.5      3.5      2.0     1.1      1.1       1.8
 23       .24      .31      .63      .60     3.5       4.2      3.8      3.4      2.1     1.1      1.0       1.7
 24       .27      .31      .64      .56     8.7       3.7      5.1      3.5      2.0     1.0      1.1       1.7
 25       .27      .31      .59      .55     6.5       4.0      5.3      3.6      2.0      .95     1.1       1.7
 
 26       .27      .33      .52      .56     6.2       4.8      4.6      3.5      1.8      .85     1.1       1.7
 27       .27      .32      .45      .59     5.5       3.7      4.2      3.4      1.7      .77     1.1       1.7
 28       .27      .31      .47      .59     5.3       5.3      4.0      3.4      1.6      .78      .98      1.6
 29       .27      .32      .49      .73      ---      4.9      4.0      3.5      1.6      .83      .97      1.6
 30       .27      .34      .46      .70      ---      3.9      4.1      3.3      1.5      .82      .93      1.6
 31       .25      ---      .45      .71      ---      3.5      ---      3.2      ---      .89     1.2       ---
 
TOTAL    8.08     8.77    17.43    17.28   100.68    123.6    121.3    120.9     71.1    33.90    32.19     57.4
MEAN      .26      .29      .56      .56     3.60     3.99     4.04     3.90     2.37     1.09     1.04     1.91
MAX       .31      .38      1.2      1.0      8.7      5.3      5.3      5.1      3.2      1.5      1.3      2.5
MIN       .22      .20      .34      .45      .68      3.1      3.5      3.2      1.5      .77      .67      1.6
AC-FT      16       17       35       34      200      245      241      240      141       67       64      114


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1968 - 1998, BY WATER YEAR (WY)                                 
 
          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
MEAN      .87     1.11     1.19     3.60     8.95     7.04     5.73     4.67     2.99     1.99     1.53     1.00
MAX      3.83     4.54     4.51     29.2      174     49.6     31.6     25.8     16.4     10.1     5.42     4.74
(WY)     1970     1984     1979     1980     1980     1980     1993     1993     1993     1980     1983     1993
MIN      .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000     .000
(WY)     1968     1969     1969     1968     1968     1989     1968     1968     1968     1972     1968     1968
 
SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1968 - 1998
 
ANNUAL TOTAL                         146.53                     712.63                                          
ANNUAL MEAN                             .40                       1.95                       3.36               
HIGHEST ANNUAL MEAN                                                                         28.3            1980
LOWEST ANNUAL MEAN                                                                            .000          1990
  HIGHEST DAILY MEAN                     1.5   Jan 26               8.7   Feb 24             540       Feb 18 1980
  LOWEST DAILY MEAN                       .00  Jul  4                .20  Nov  2                .00    Oct  1 1967
  ANNUAL SEVEN-DAY MINIMUM                .00  Jul  4                .21  Nov  1                .00    Oct  1 1967
  INSTANTANEOUS PEAK FLOW                                          17     Feb  8            1750       Aug 17 1983
  INSTANTANEOUS PEAK STAGE                                          2.07  Feb  8               6.40    Jan 25 1969
ANNUAL RUNOFF (AC-FT)                291                       1410                       2430                  
10 PERCENT EXCEEDS                     1.0                        4.2                        6.4                
50 PERCENT EXCEEDS                      .31                       1.3                         .67               
90 PERCENT EXCEEDS                      .00                        .29                        .00