10261500 MOJAVE RIVER AT LOWER NARROWS, NEAR VICTORVILLE, CA

LOCATION.-Lat 34°34'23", long 117°19'11", in SW 1/4 SE 1/4 sec.29, T.6 N., R.4 W., San Bernardino County, Hydrologic Unit 18090208, on left bank 650 ft upstream from bridge on county road (formerly U.S. Highway 66), 0.6 mi downstream from Atchison, Topeka, & Santa Fe Railway bridge, and 3 mi northwest of Victorville. 
DRAINAGE AREA.-513 mi2. 
PERIOD OF RECORD.-February 1899 to September 1906, October 1930 to current year. Monthly discharge only for January to September 1906, October, November 1930, published in WSP 1314. Prior to October 1936, published as "at Victorville" and as "near Victorville" in 1937. 
  CHEMICAL DATA: Specific conductance 1975-81. 
  WATER TEMPERATURE: Water years 1962-80. 
REVISED RECORDS.-WSP 1927: Drainage area. 
GAGE.-Water-stage recorder and crest-stage gage. Datum of gage is 2,643.01 ft above sea level. See WSP 1314 for history of gage changes prior to Mar. 28, 1938. Mar. 28, 1938, to Apr. 14, 1966, at site 350 ft upstream at datum 5.00 ft higher; Apr. 15, 1966, to July 17, 1969, at site 350 ft upstream at datum 3.00 ft higher. 
REMARKS.-Records fair. Flow regulated by Mojave River Forks Reservoir, capacity 89,700 acre-ft, since 1971, 17.8 mi upstream, Silverwood Lake, capacity 78,000 acre-ft, since 1971, and Lake Arrowhead, capacity, 48,000 acre-ft, since 1922. Some water is imported into basin. Diversions and pumping for irrigation and for Mojave State Fish Hatchery upstream from station. See schematic diagram of Mojave River Basin.
EXTREMES FOR PERIOD OF RECORD.-Maximum discharge, 70,600 ft3/s, Mar. 2, 1938, gage height, 23.7 ft, present datum, from rating curve extended above 10,000 ft3/s on basis of slope-area measurement of peak flow; no flow Sept. 21-23, 1995. 

                  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       2.1      5.4       17       15       16     e170      398      209       77    e11        3.9     20  
  2       2.1      5.5       16       15       16     e130      272      177       59    e10        4.2     13  
  3       2.2      5.7       16       15       76      103      213      167       40    e10        3.6     16  
  4       2.1      5.8       13       15       24       80      238      199       38     e9.5      2.2     14  
  5       2.0      5.7       10       14       17       68      266      225       35     e9.2      2.5     13  
 
  6       2.1      5.8     e387       15       34       76      295      209       27     e8.9      3.8     12  
  7       2.1      6.0       77       14       67      128      319      574       31     e8.5      5.4     11  
  8       2.1      5.9       36       14     1590       75      273      514       28     e8.3      7.3     12  
  9       2.2      6.4       18       15      383       37      260      367       21     e7.8      7.5     11  
 10       2.2      6.7       16       17       93       36      255      245       18     e7.8     12        9.5
 
 11       2.3      6.6       16       16       46       39      250      222       16     e7.5      6.7      8.2
 12       2.4      7.2       20       16       33       33      368      290       16     e7.2      6.1      9.4
 13       2.6      7.9       20       16       28       38      348      820      e16     e7.0      6.4      9.6
 14       2.7      9.5       20       16       25       84      412      825       16     e6.7      5.9      9.7
 15       2.8      9.5       20       17       82      107      424      832       13     e6.6      5.1      7.0
 
 16       2.9      8.7       16       17       81       95      284      477      e16      5.7      5.0      5.8
 17       3.0      9.2       13       16       29      103      206      414       14      4.9      4.7      5.2
 18       3.2      8.8       17       17       24      129      155      316       16      4.0      4.6      5.6
 19       3.4      9.0       18       17       26      158      181      267       11      3.3      4.4      5.1
 20       3.5     16         15       17       26      160      213      246      e11      3.8      4.4      6.3
 
 21       4.0     17         16       17       20      150      295      228       11     e5.5      3.7      7.2
 22       4.2     16         16       17       27      143      382      235       10      3.3      3.4      8.7
 23       4.0     14         17       18    e1220      177      451      237      e12      5.2      4.0      8.5
 24       4.1     15         16       17    e8000      209      362      211      e13      9.5      3.4      8.2
 25       4.2     13         16       16    e1240      242      267      218      e14      4.6      3.5      8.2
 
 26       4.3     17         15       17     e650      980      183      149       15      3.0      2.6      7.8
 27       4.4     17         17       16     e350      623      172      168      e15      3.4      3.4      7.6
 28       4.6     16         17       16     e230      570      161      158       15      4.4      4.4      7.6
 29       4.9     16         16       16      ---      535      184      185      e13      4.8      5.2      8.6
 30       5.0     17         15       15      ---      531      200      171      e11      3.3      5.7      8.7
 31       5.2      ---       14       16      ---      455      ---      114      ---      3.3     95        ---
 
TOTAL    98.9    309.3      956      495    14453     6464     8287     9669      648    198.0    240.0    284.5
MEAN     3.19     10.3     30.8     16.0      516      209      276      312     21.6     6.39     7.74     9.48
MAX       5.2       17      387       18     8000      980      451      832       77       11       95       20
MIN       2.0      5.4       10       14       16       33      155      114       10      3.0      2.2      5.1
AC-FT     196      613     1900      982    28670    12820    16440    19180     1290      393      476      564
 
    e  Estimated.


STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 1998, BY WATER YEAR (WY)                                 
  
          OCT      NOV      DEC      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP
 
MEAN     24.2     35.8     51.9     99.8      215      227      129     49.5     21.9     15.0     15.2     17.1
MAX      58.2      222      376     1487     2334     2229     1015      312      157     32.5     29.3     41.7
(WY)     1977     1966     1967     1993     1993     1938     1958     1998     1978     1969     1969     1976
MIN      3.19     10.3     13.5     16.0     18.2     12.6     11.6     6.78     3.64     1.90     1.60     1.63
(WY)     1998     1998     1995     1998     1991     1990     1990     1997     1997     1997     1997     1996
 
SUMMARY STATISTICS           FOR 1997 CALENDAR YEAR        FOR 1998 WATER YEAR           WATER YEARS 1931 - 1998
 
ANNUAL TOTAL                        4556.5                    42102.7                                           
ANNUAL MEAN                           12.5                      115                         74.4                
HIGHEST ANNUAL MEAN                                                                        402              1969
LOWEST ANNUAL MEAN                                                                          11.3            1997
  HIGHEST DAILY MEAN                   485     Jan 27            8000     Feb 24           21000       Feb 25 1969
  LOWEST DAILY MEAN                      1.4   Aug 20               2.0   Oct  5                .00    Sep 21 1995
  ANNUAL SEVEN-DAY MINIMUM               1.5   Aug 18               2.1   Oct  1                .37    Sep 20 1995
  INSTANTANEOUS PEAK FLOW                                       24000     Feb 24           70600       Mar  2 1938
  INSTANTANEOUS PEAK STAGE                                          9.25  Feb 24              23.70    Mar  2 1938
ANNUAL RUNOFF (AC-FT)               9040                      83510                      53900                  
10 PERCENT EXCEEDS                    19                        277                         55                  
50 PERCENT EXCEEDS                     7.2                       16                         27                  
90 PERCENT EXCEEDS                     1.6                        3.8                       11