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USGS Surface-Water Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 11092450 LOS ANGELES R A SEPULVEDA DAM CA


Los Angeles County, California
Hydrologic Unit Code 18070105
Latitude  34°09'42", Longitude 118°27'57" NAD27
Drainage area 158  square miles
Gage datum 655.13 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1942-10-01 -> 2024-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 55 82 234 114 32 30 28 29 30 30 34 40
2 109 124 173 48 33 29 28 29 30 30 30 84
3 135 111 85 80 65 28 28 30 29 30 31 63
4 130 170 276 84 41 27 28 30 30 30 32 95
5 231 294 108 71 31 28 28 29 36 38 40 70
6 163 267 153 83 39 27 28 29 32 33 63 99
7 210 106 107 64 34 27 27 33 28 31 106 53
8 84 107 167 69 64 27 28 29 29 29 76 35
9 329 236 46 80 49 28 28 29 29 28 48 36
10 229 265 100 44 31 29 28 29 48 28 33 37
11 90 282 75 50 33 28 30 31 32 32 40 68
12 96 267 88 57 33 28 28 29 28 28 43 116
13 63 92 77 70 30 29 29 28 28 41 35 43
14 144 91 77 78 32 29 29 28 29 55 57 78
15 139 53 236 50 30 29 29 29 42 31 60 97
16 215 109 123 35 35 30 28 28 29 30 74 95
17 108 180 78 35 31 29 29 62 29 54 104 55
18 203 150 45 40 35 29 36 30 29 42 47 126
19 132 224 43 34 32 28 30 28 29 45 53 130
20 188 141 222 44 29 27 30 102 28 69 99 121
21 153 211 168 37 29 28 29 51 31 30 129 130
22 218 206 150 42 43 28 29 30 45 29 136 123
23 132 171 68 33 29 28 30 30 29 28 45 126
24 180 207 42 35 29 27 29 31 28 33 52 116
25 258 267 69 34 27 28 30 30 29 43 45 92
26 160 114 43 42 28 29 29 30 29 58 60 115
27 125 143 92 42 28 28 29 29 29 48 36 100
28 71 242 119 49 28 28 29 29 31 33 68 233
29 57 50 59 31 29 28 29 29 31 30 149 212
30 81   95 35 29 28 28 29 30 35 71 174
31 93   79   30   29 29   29   103