A 100 ha watershed has the following characteristics: i. Maximum length of travel of water in the catchment = 3500 m ii. Difference in elevation between the most remote point on the catchment and the outlet = 65 m iii. Land use/cover details: (see uploaded image!!) The maximum intensity-duration-frequency relationship for the watershed is given by: 3 97T 0.165/(D+0.5)0.733 where i = intensity in cm/h, T = Return period in years and D = duration of rainfall in hours. Estimate the 25-year peak runoff from the watershed that can be expected at the outlet of the watershed.
A 100 ha watershed has the following characteristics: i. Maximum length of travel of water in the catchment = 3500 m ii. Difference in elevation between the most remote point on the catchment and the outlet = 65 m iii. Land use/cover details: (see uploaded image!!) The maximum intensity-duration-frequency relationship for the watershed is given by: 3 97T 0.165/(D+0.5)0.733 where i = intensity in cm/h, T = Return period in years and D = duration of rainfall in hours. Estimate the 25-year peak runoff from the watershed that can be expected at the outlet of the watershed.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A 100 ha watershed has the following characteristics:
i. Maximum length of travel of water in the catchment = 3500 m
ii. Difference in elevation between the most remote point on the catchment and the
outlet = 65 m
iii. Land use/cover details: (see uploaded image!!)
The maximum intensity-duration-frequency relationship for the watershed is given by:
3 97T
0.165/(D+0.5)0.733
where i = intensity in cm/h, T = Return period in years and D = duration of rainfall in hours.
Estimate the 25-year peak runoff from the watershed that can be expected at the outlet of the
watershed.
Transcribed Image Text:111.
Land use/cover details:
Land use/cover
Forest
Pasture
Cultivated Land
Area (ha)
30
10
60
Runoff Coefficient
0.25
0.16
0.40
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