11023000 SAN DIEGO RIVER AT FASHION VALLEY, AT SAN DIEGO, CA
LOCATION.--Lat 32°45'54", long 117°10'04", in Mission San Diego Grant, San Diego County, Hydrologic Unit
18070304, on left bank 2.6 mi upstream from mouth, 500 ft upstream from Fashion Valley Road crossing, 0.4 mi
downstream from unnamed tributary, and 26.4 mi downstream from El Capitan Lake.
DRAINAGE AREA.--429 mi2.
PERIOD OF RECORD.--October 1912 to January 1916 published as San Diego River at San Diego (monthly discharge
only, published in WSP 1315-B), January 1982 to current year. Records for October 1, 1981 to January 17,
1982, published in WDR CA-82-1, are in error and should not be used.
REVISED RECORDS.--See PERIOD OF RECORD.
GAGE.--Water-stage recorder. Elevation of gage is 20 ft above sea level, from topographic map. See WSP 1315-B
for history of changes for period October 1912 to January 1916.
REMARKS.--Records poor through December and good thereafter. Flow regulated by Cuyamaca Reservoir, capacity,
11,740 acre-ft; El Capitan Lake (station 11020600), and San Vicente Reservoir (station 11022100). Diversions
by city of San Diego for municipal supply and by Helix Irrigation District.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 75,000 ft3/s, Jan. 27, 1916, gage height, 19.3 ft, site and
datum then in use, estimated on basis of upstream station, San Diego River near Santee; no flow at times
during some years. Maximum discharge recorded since storage began in El Capitan Lake and San Vicente
Reservoir, 9,430 ft3/s, Mar. 6, 1995, gage height, 13.47 ft, from rating curve extended above 5,800 ft3/s.
DISCHARGE, CUBIC FEET PER SECOND, WATER YEAR OCTOBER 1995 TO SEPTEMBER 1996
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 1.2 15 e7.4 10 422 35 17 6.7 1.8 .84 .69 .54
2 1.1 30 e7.5 9.3 115 27 17 6.4 1.9 .79 .69 .61
3 1.4 11 e7.7 8.5 50 23 16 5.7 1.8 .69 .81 .55
4 1.3 8.7 e7.8 8.0 37 21 15 5.1 1.7 .65 .85 .59
5 1.2 6.8 e7.6 7.9 32 114 14 4.3 1.6 .71 .80 .73
6 1.3 e6.9 e7.6 7.5 29 82 13 3.7 1.5 .74 .62 .72
7 1.7 e6.2 e7.6 7.2 27 35 11 3.5 1.4 .80 .47 .73
8 1.7 e5.7 e7.7 7.1 24 25 9.9 3.2 1.4 .88 .38 .79
9 1.5 e6.8 e7.4 7.8 24 22 8.9 3.0 1.5 .70 .35 .79
10 1.3 e6.4 e6.8 7.5 25 20 8.4 2.1 1.4 1.3 .40 .79
11 1.5 e6.5 e6.7 7.3 21 18 8.3 1.6 1.4 1.6 .56 .63
12 .96 e6.9 e6.8 7.3 20 43 8.6 1.6 2.3 1.5 .58 .57
13 .66 e7.4 e7.4 7.4 24 507 9.8 1.6 2.0 1.3 .48 .55
14 1.1 e7.8 e8.2 7.2 24 328 9.6 1.5 1.7 1.3 .45 .63
15 1.7 e7.7 e7.5 7.0 21 121 9.7 1.3 1.7 1.3 .45 .63
16 1.6 e8.0 e7.3 8.1 19 71 9.8 1.2 1.7 1.1 .45 .66
17 1.5 e8.0 e7.0 30 18 53 12 1.2 1.7 .98 .45 .61
18 1.6 e8.2 e7.1 20 18 44 74 1.5 1.5 .79 .50 .57
19 1.4 e8.6 e6.8 19 17 38 53 1.5 1.5 .64 .70 .50
20 1.1 e9.0 e25 16 17 33 30 1.4 1.5 .58 .80 .41
21 1.3 e9.2 e15 18 18 29 19 1.2 1.2 .70 .57 .40
22 1.3 e8.8 e10 106 35 25 15 1.3 1.3 .79 .49 .55
23 1.0 7.9 e70 99 26 23 12 1.2 1.5 .71 .47 .70
24 .95 7.7 e40 39 22 22 11 1.2 1.4 .71 .52 .78
25 .85 7.3 e20 27 92 20 9.9 1.5 1.5 .68 .59 .73
26 .59 6.9 e15 28 181 19 9.9 2.1 1.4 .67 .55 1.2
27 .57 6.9 e12 21 81 18 9.3 1.9 1.2 .61 .47 1.2
28 .74 6.8 e11 23 105 19 8.3 1.7 1.0 .59 .44 1.2
29 .46 e6.8 e11 20 65 20 7.4 2.0 .82 .70 .46 1.2
30 .66 e7.0 10 17 --- 18 6.9 2.0 .83 .73 .49 1.2
31 .74 --- 10 68 --- 18 --- 1.9 --- .68 .45 ---
TOTAL 35.98 256.9 388.9 676.1 1609 1891 463.7 76.1 45.15 26.76 16.98 21.76
MEAN 1.16 8.56 12.5 21.8 55.5 61.0 15.5 2.45 1.50 .86 .55 .73
MAX 1.7 30 70 106 422 507 74 6.7 2.3 1.6 .85 1.2
MIN .46 5.7 6.7 7.0 17 18 6.9 1.2 .82 .58 .35 .40
AC-FT 71 510 771 1340 3190 3750 920 151 90 53 34 43
e Estimated.
11023000 SAN DIEGO RIVER AT FASHION VALLEY, AT SAN DIEGO, CA--Continued
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1982 - 1996, BY WATER YEAR (WY)
OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
MEAN 6.42 28.9 47.5 111 98.3 171 47.7 18.8 7.32 3.02 2.51 3.20
MAX 31.2 144 143 683 458 777 242 135 21.3 8.93 9.47 20.0
(WY) 1987 1986 1985 1993 1993 1983 1983 1983 1983 1983 1983 1986
MIN .62 .87 5.09 14.5 20.5 8.38 7.69 2.45 1.30 .25 .54 .033
(WY) 1990 1990 1990 1989 1989 1984 1989 1996 1985 1985 1985 1984
SUMMARY STATISTICS FOR 1995 CALENDAR YEAR FOR 1996 WATER YEAR WATER YEARS 1982 - 1996
ANNUAL TOTAL 30540.43 5508.33
ANNUAL MEAN 83.7 15.1 45.2
HIGHEST ANNUAL MEAN 125 1983
LOWEST ANNUAL MEAN 11.5 1989
HIGHEST DAILY MEAN 3920 Mar 6 507 Mar 13 4760 Mar 3 1983
LOWEST DAILY MEAN .46 Oct 29 .35 Aug 9 .00 Sep 7 1984
ANNUAL SEVEN-DAY MINIMUM .66 Oct 25 .46 Aug 8 .00 Sep 13 1984
INSTANTANEOUS PEAK FLOW 766 Mar 13 9430 Mar 6 1995
INSTANTANEOUS PEAK STAGE 7.48 Mar 13 13.47 Mar 6 1995
ANNUAL RUNOFF (AC-FT) 60580 10930 32780
10 PERCENT EXCEEDS 155 29 87
50 PERCENT EXCEEDS 14 5.9 7.3
90 PERCENT EXCEEDS 1.5 .59 .70
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