Page 409 - Planning and Design of Airports
P. 409
Capacity
Size of Invert of Pipe, Slope of Remarks Elevation ft 3 /s Pipe, ft/ft Pipe, in = 0.015 n 81.52 5.0 0.008 15 81.04 5.0 0.008 15 See 78.00 20.0 0.010 24 accumulated runoff computed below. Accumulated 73.80 30.0 0.012 27 runoff adjustment negligible. 68.52 33.0 0.014 27 63.
Velocity of Drain, ft/s 4.0 4.0 6.2 7.4 8.0 9.5
Accumulated Runoff, ft 3/ s 4.55 4.60 17.90 25.13 30.70 36.24 Drainage System Design Data
Runoff Q ft 3 /s 4.55 4.60 9.56 7.23 5.57 5.54 Source: Federal Aviation Administration [2].
Inlet 5A 5 4 3 2 1 Outlet TABLE 9-3
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