Page 412 - Planning and Design of Airports

Airport Drainage 357

*
3
Time, min Intensity I Q = CIA, ft /s Volume V = CIAt, ft 3
5 5.80 77.1 23,100
10 4.96 65.9 39,600
15 4.33 57.5 51,800
20 3.95 52.5 63,000
30 3.18 42.3 76,100
60 2.00 26.6 95,700
90 1.62 21.5 116,300
120 1.26 16.7 120,600
180 0.87 11.6 125,000
∗ Hourly intensities from Fig. 9-4.

TABLE 9-4 Volume of Runoff—Ponding

FIGURE 9-7 Cumulative runoff for ponding in Fig. 9-6 (Federal Aviation
Administration [2] ).