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 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 8.5 10 16 21 24 26 16 15 9.5 3.2 3.0 1.9
2 9.9 12 17 19 23 24 17 13 12 3.2 3.2 1.9
3 e9.5 13 18 16 22 28 21 13 15 2.4 2.9 1.9
4 e9.2 14 26 14 22 27 15 14 12 2.5 2.5 2.0
5 e9.0 14 29 22 22 23 16 13 12 2.7 2.4 2.0
6 8.9 13 31 22 23 20 16 13 10 2.6 2.3 2.0
7 8.9 12 30 20 21 18 17 16 8.9 2.7 2.3 2.0
8 9.0 14 24 17 21 17 18 14 8.2 2.9 2.3 2.0
9 9.8 14 27 17 22 16 19 15 8.4 4.4 2.3 1.9
10 9.2 13 31 e15 23 16 24 15 8.7 4.3 2.2 1.9
11 9.5 13 30 e14 21 15 20 12 8.6 59 2.3 2.0
12 9.8 e12 27 e15 22 16 27 12 9.0 23 2.3 2.0
13 e9.8 e10 23 15 19 16 20 12 7.9 13 2.4 1.8
14 e9.9 11 24 14 19 16 20 11 8.1 6.0 2.6 1.9
15 e10 12 21 14 17 15 23 12 7.6 4.8 2.3 2.0
16 10 14 22 17 17 16 22 11 6.9 4.3 2.2 2.0
17 11 17 23 19 20 15 24 11 6.2 4.4 2.1 2.0
18 10 14 24 18 26 15 25 10 6.2 4.9 2.1 2.0
19 11 14 26 18 26 18 18 9.0 5.5 4.4 2.0 1.9
20 e11 15 22 16 27 19 17 9.4 5.6 3.4 2.0 1.9
21 e11 21 27 13 27 18 22 9.0 5.1 2.7 1.8 1.9
22 e11 18 25 13 28 20 24 9.9 4.7 2.4 1.9 2.0
23 12 17 26 14 25 20 17 10 4.3 2.7 1.8 2.0
24 12 20 26 15 26 20 18 11 4.4 2.6 1.7 2.2
25 12 16 26 22 24 17 21 12 3.6 2.5 1.8 2.3
26 e11 16 25 24 20 15 21 9.8 3.4 3.0 1.8 2.8
27 e11 16 25 27 20 15 19 11 3.2 3.1 1.9 2.8
28 10 15 24 24 21 14 20 11 3.5 2.4 1.8 2.8
29 11 13 20 22 --- 15 17 9.4 3.2 2.4 1.7 2.8
30 11 16 21 23 --- 15 18 9.4 3.1 2.4 1.8 2.9
31 11 --- 21 23 --- 16 --- 11 --- 2.7 1.9 ---
TOTAL 316.9 429 757 563 628 561 592 363.9 214.8 187.0 67.6 63.5
MEAN 10.2 14.3 24.4 18.2 22.4 18.1 19.7 11.7 7.16 6.03 2.18 2.12
MAX 12 21 31 27 28 28 27 16 15 59 3.2 2.9
MIN 8.5 10 16 13 17 14 15 9.0 3.1 2.4 1.7 1.8
AC-FT 629 851 1500 1120 1250 1110 1170 722 426 371 134 126
e Estimated.
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1931 - 1999, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 24.0 35.5 51.5 98.6 212 224 128 48.9 21.7 14.9 15.0 16.9
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 1998 CALENDAR YEAR FOR 1999 WATER YEAR WATER YEARS 1931 - 1999
ANNUAL TOTAL 42239.4 4743.7
ANNUAL MEAN 116 13.0 73.5
HIGHEST ANNUAL MEAN 402 1969
LOWEST ANNUAL MEAN 11.3 1997
HIGHEST DAILY MEAN 8000 Feb 24 59 Jul 11 21000 Feb 25
1969
LOWEST DAILY MEAN 2.2 Aug 4 1.7 Aug 24 .00 Sep 21
1995
ANNUAL SEVEN-DAY MINIMUM 3.3 Jul 30 1.8 Aug 23 .37 Sep 20
1995
INSTANTANEOUS PEAK FLOW 558 Jul 11 70600 Mar 2
1938
INSTANTANEOUS PEAK STAGE 2.96 Jul 11 23.70 Mar 2
1938
ANNUAL RUNOFF (AC-FT) 83780 9410 53260
10 PERCENT EXCEEDS 272 24 54
50 PERCENT EXCEEDS 16 13 27
90 PERCENT EXCEEDS 5.3 2.1 11
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