Drainage Design Manual, Hydrology - Flood Control District of ...

Drainage Design Manual for Maricopa County
Hydrology: Rainfall
Table 2.4
6-HOUR DISTRIBUTIONS
Percent of Rainfall Depth
Time, in hours Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
0.00 0.0 0.0 0.0 0.0 0.0
0.25 0.8 0.9 1.5 2.1 2.4
0.50 1.6 1.6 2.0 3.5 4.3
0.75 2.5 2.5 3.0 5.1 5.9
1.00 3.3 3.4 4.8 7.1 7.8
1.25 4.1 4.2 6.3 8.7 9.8
1.50 5.0 5.1 7.6 10.5 11.9
1.75 5.8 5.9 9.0 12.5 14.1
2.00 6.6 6.7 10.5 14.3 16.2
2.25 7.4 7.6 11.9 16.0 18.6
2.50 8.7 8.7 13.5 17.9 21.2
2.75 9.9 10.0 15.2 20.1 23.9
3.00 11.8 12.0 17.5 23.2 27.1
3.25 13.8 16.3 22.2 28.1 32.1
3.50 21.6 25.2 30.4 36.4 40.8
3.75 37.7 45.1 47.2 50.0 51.5
4.00 83.4 69.4 67.0 65.8 62.7
4.25 91.1 83.7 79.6 77.3 73.5
4.50 93.1 90.0 86.8 84.1 81.4
4.75 95.0 93.8 91.2 88.8 86.4
5.00 96.2 95.0 94.6 92.7 90.7
5.25 97.2 96.3 96.0 94.5 93.0
5.50 98.3 97.5 97.3 96.4 95.4
5.75 99.1 98.8 98.7 98.2 97.7
6.00 100.0 100.0 100.0 100.0 100.0
August 15, 2013 2-13