Rainfall intensities during each 30 minutes of a 150-minute storm are presented in the table below. For a basin of 500 acres, if the direct runoff was measured to be 105 acre-ft, find the D index in (in/hr). Time (min) 0-10 10-20 20-30 30-40 40-50 50-60 60-70 Rainfall Intensity (in/hr) 0.5 2.0 6.5 5.0 0.9 2.0 3.0
Rainfall intensities during each 30 minutes of a 150-minute storm are presented in the table below. For a basin of 500 acres, if the direct runoff was measured to be 105 acre-ft, find the D index in (in/hr). Time (min) 0-10 10-20 20-30 30-40 40-50 50-60 60-70 Rainfall Intensity (in/hr) 0.5 2.0 6.5 5.0 0.9 2.0 3.0
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Rainfall intensities during each 30 minutes of a 150-minute
storm are presented in the table below. For a basin of 500
acres, if the direct runoff was measured to be 105 acre-ft, find
the index in (in/hr).
Time
(min)
0-10
10-20
20-30
30-40
40-50
50-60
60-70
Rainfall Intensity
(in/hr)
0.5
2.0
6.5
5.0
0.9
2.0
3.0
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