|
ALERT System - Orange
County Point Precipitation
Return Frequency Data
|
Numbers
in ( ) are for areas above 2000 feet elevation. Data is from tde
Santiago Peak gage station #156, DWR deptd-duration-frequency table
(1953).
Precipitation data for nonmountainous areas
are taken from an average of 25 rain gages.
Time
Years |
5
min. |
30
min |
1
hour |
3
hours |
6
hours |
24
hours |
|
100
|
0.52
(0.78) |
1.09
(1.34) |
1.45
(1.94) |
2.43
(3.96) |
3.36
(6.19) |
5.63
(11.27) |
| 50 |
0.45 (0.71) |
0.98 (1.19) |
1.30 (1.73) |
2.19 (3.52) |
3.02 (5.51) |
5.07 (10.02) |
| 25 |
0.40 (0.63) |
0.87 (1.04) |
1.15 (1.51) |
1.94 (3.08) |
2.71 (4.81) |
4.49 (8.76) |
| 10 |
0.34 (0.50) |
0.72 (0.84) |
0.95
(1.22) |
1.59
(2.48) |
2.20
(3.87) |
3.68
(7.05) |
| 5 |
0.26 (0.40) |
0.59 (0.68) |
0.78
(0.99) |
1.31
(2.01) |
1.81
(3.14) |
3.03
(5.71) |
| 2 |
0.19 (0.26) |
0.40 (0.45) |
0.53 (0.66) |
0.89 (1.34) |
1.22 (2.09) |
2.05 (3.81) |
|
yellow
|
used
on ALERT rain maps for 5 year return frequency |
|
red
|
used
on ALERT rain maps for 10 year return frequency |
|
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