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Problem 7.18. A uniform constant intensity storm took place over a basin which has a drainage area of 162 km². The intensity of the rainfall is 12 mm/hr whereas the infiltration rate (also constant) is 4 mm/hr. The measured hydrograph at the outlet of the basin is given in Figure 7.37. Q (m³/s) 1000 100 0 0 30 60 90 120 150 t (min) Figure 7.37 Hyetograph of the storm (Problem 7.18) a) Assuming constant base flow separate the hydrograph and find the depth of surface runoff, b) Determine the duration of excess precipitation, c) Determine UH of this basin for excess rainfall duration.

Problem 7.18. A uniform constant intensity storm took place over a basin which has a drainage area of 162 km². The intensity of the rainfall is 12 mm/hr whereas the infiltration rate (also constant) is 4 mm/hr. The measured hydrograph at the outlet of the basin is given in Figure 7.37. Q (m³/s) 1000 100 0 0 30 60 90 120 150 t (min) Figure 7.37 Hyetograph of the storm (Problem 7.18) a) Assuming constant base flow separate the hydrograph and find the depth of surface runoff, b) Determine the duration of excess precipitation, c) Determine UH of this basin for excess rainfall duration.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Engineering hydrology - hydrograph analysis

Problem 7.18. A uniform constant intensity storm took place over a basin which has a drainage area of 162 km². The intensity of the rainfall is 12 mm/hr whereas the infiltration rate (also constant) is 4 mm/hr. The measured hydrograph at the outlet of the basin is given in Figure 7.37. Q (m³/s) 1000 100 0 0 30 60 90 120 150 t (min) Figure 7.37 Hyetograph of the storm (Problem 7.18) a) Assuming constant base flow separate the hydrograph and find the depth of surface runoff, b) Determine the duration of excess precipitation, c) Determine UH of this basin for excess rainfall duration.
Transcribed Image Text:Problem 7.18. A uniform constant intensity storm took place over a basin which has a drainage area of 162 km². The intensity of the rainfall is 12 mm/hr whereas the infiltration rate (also constant) is 4 mm/hr. The measured hydrograph at the outlet of the basin is given in Figure 7.37. Q (m³/s) 1000 100 0 0 30 60 90 120 150 t (min) Figure 7.37 Hyetograph of the storm (Problem 7.18) a) Assuming constant base flow separate the hydrograph and find the depth of surface runoff, b) Determine the duration of excess precipitation, c) Determine UH of this basin for excess rainfall duration.
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