The mass curve of an isolated storm in a 500 ha watershed is as follows: Time (hr) 4 6. 8 10 12 14 16 18 Cumulative 0.8 2.6 2.8 4.1 7.3 10.8 11.8 12.4 12.6 rainfall (cm) If the direct runoff produced by the storm is measured at the outlet of the watershed a • Determine the total ER and infiltration in cm. • Estimate the d-index of the storm and the duration of the rainfall excess. • Plot the hyetograph showing the d-index. • Plot the ER.
The mass curve of an isolated storm in a 500 ha watershed is as follows: Time (hr) 4 6. 8 10 12 14 16 18 Cumulative 0.8 2.6 2.8 4.1 7.3 10.8 11.8 12.4 12.6 rainfall (cm) If the direct runoff produced by the storm is measured at the outlet of the watershed a • Determine the total ER and infiltration in cm. • Estimate the d-index of the storm and the duration of the rainfall excess. • Plot the hyetograph showing the d-index. • Plot the ER.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The mass curve of an isolated storm in a 500 ha watershed is as follows:
Time (hr)
4
6.
8
10
12
14
16
18
Cumulative
0.8
2.6
2.8
4.1
7.3
10.8
11.8
12.4
12.6
rainfall (cm)
If the direct runoff produced by the storm is measured at the outlet of the watershed as 0.340M m3,
• Determine the total ER and infiltration in cm.
• Estimate the O-index of the storm and the duration of the rainfall excess.
Plot the hyetograph showing the O-index.
• Plot the ER.
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