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

Drainage Design Manual for Maricopa County
Hydrology: Application
( 645.33) ( 5.44)
Q ult = ------------------------------------ =
( 10 ⁄ 60)
21,064 cfs
e. Compute the discharge and lag corresponding to the values for percent Q ult and percent
lag in Table 5.5.
Percent
Q ult
(1)
Discharge
cfs
(2)
Percent
Lag
(3)
Lag
hours
(4)
Percent
Q ult
(1)
Discharge
cfs
(2)
Percent
Lag
(3)
Lag
hours
(4)
0 0 0.0 0.00 52 10953 103.4 1.13
2 421 23.0 0.25 54 11375 107.0 1.17
4 843 31.0 0.34 56 11796 110.8 1.21
6 1264 37.0 0.40 58 12217 114.7 1.25
8 1685 42.0 0.46 60 12638 118.7 1.29
10 2106 46.0 0.50 62 13060 122.9 1.34
12 2528 49.8 0.54 64 13481 127.3 1.39
14 2949 53.4 0.58 66 13902 131.9 1.44
16 3370 56.8 0.62 68 14324 136.7 1.49
18 3792 60.0 0.65 70 14745 141.7 1.54
20 4213 63.1 0.69 72 15166 147.1 1.60
22 4634 66.1 0.72 74 15587 152.8 1.67
24 5055 69.0 0.75 76 16009 158.8 1.73
26 5477 71.8 0.78 78 16430 165.5 1.80
28 5898 74.4 0.81 80 16851 172.9 1.88
30 6319 76.8 0.84 82 17272 181.6 1.98
32 6740 79.1 0.86 84 17694 191.0 2.08
34 7162 81.2 0.89 86 18115 201.0 2.19
36 7583 83.2 0.91 88 18536 212.0 2.31
38 8004 85.1 0.93 90 18958 226.0 2.46
40 8426 86.8 0.95 92 19379 244.0 2.66
42 8847 88.8 0.97 94 19800 265.0 2.89
44 9268 91.0 0.99 96 20221 295.0 3.22
46 9689 93.8 1.02 98 20643 342.0 3.73
48 10111 96.8 1.06 100 21064 462.0 5.04
50 10532 100.0 1.09
Notes:
(1) = From Table 5.5 (2) = (1) * Q ult
(3) = From Table 5.5 (4) = (3) * Lag
9-50 August 15, 2013