Page 407 - Planning and Design of Airports

Time of Tributary Rainfall Runoff Area A, Intensity Coefficient Concentration, Remarks acres I C min = 0.015 n 2.88 3.10 0.51 31.2 2.32 3.15 0.63 30.0 See accumulated 8.75 2.80 0.39 37.7 runoff computed below. Accumulated 7.24 2.70 0.37 38.9 runoff adjustment negligible. 5.39

Flow Time, min 1.8 1.6 1.1 1.0 0.8 0.5

Inlet Time, min 31.2 30.0 37.7 38.9 34.4 30.7

Length of Segment, ft 440 380 420 440 380 330 Flow from inlet 4 subarea = 9.56 Accumulated flow entering inlet 4 in 37.7 min = 17.90 ft 3 /s

Segment 1-outlet Applying these data in the formula Q = CIA: Adjusted flow from inlet 5 = 0.63 × 2.85 × 2.32 = 4.16 Adjusted flow from inlet 5A = 0.51 × 2.85 × 2.88 = 4.18 Flow into inlet 4 from inlets 5 and 5A in 37.7 min = 8.34
Line 5A-4 5-4 4-3 3-2 2-1

Inlet 5A 5 4 3 2 1 Outlet

354