Determine a) effective precipitation depth >) Þ-index c) total infiltrated amount of water

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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Problem 1: An infiltrometer test was made on a certain soil and results are tabulated below:
t (min)
10
20
6.45 4.68
f(cm/hr)
0
8.76
5
7.9
30
60
3.59 1.76
Determine
a) effective precipitation depth
b) Þ-index
c) total infiltrated amount of water
In the same area, a storm of 120 min. occurred with the following intensities:
t(min)
0-30
i(mm/hr)
30
90
1.1
30-90
72
90-120
34
120
0.75
150
0.75
(Note: Assume constant infiltration rate for each constant intensity of rainfall interval by taking the averages
of the infiltrometer data.)
Transcribed Image Text:Problem 1: An infiltrometer test was made on a certain soil and results are tabulated below: t (min) 10 20 6.45 4.68 f(cm/hr) 0 8.76 5 7.9 30 60 3.59 1.76 Determine a) effective precipitation depth b) Þ-index c) total infiltrated amount of water In the same area, a storm of 120 min. occurred with the following intensities: t(min) 0-30 i(mm/hr) 30 90 1.1 30-90 72 90-120 34 120 0.75 150 0.75 (Note: Assume constant infiltration rate for each constant intensity of rainfall interval by taking the averages of the infiltrometer data.)
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