A basin is divided by 1-h isochrones into four sub-areas of size 200, 250, 350 and 170 hectares from the upstream end of the outlet respectively. A rainfall event of 5-h duration with intensities of 1.7 cm/h for the first 2 h and 1.25 cm/h for the next 3 h occurs uniformly over the basin. Assuming a constant runoff coefficient of 0.5, estimate the peak rate of runoff.
A basin is divided by 1-h isochrones into four sub-areas of size 200, 250, 350 and 170 hectares from the upstream end of the outlet respectively. A rainfall event of 5-h duration with intensities of 1.7 cm/h for the first 2 h and 1.25 cm/h for the next 3 h occurs uniformly over the basin. Assuming a constant runoff coefficient of 0.5, estimate the peak rate of runoff.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A basin is divided by 1-h isochrones into four sub-areas of size 200, 250, 350 and 170
hectares from the upstream end of the outlet respectively. A rainfall event of 5-h duration
with intensities of 1.7 cm/h for the first 2 h and 1.25 cm/h for the next 3 h occurs uniformly
over the basin. Assuming a constant runoff coefficient of 0.5, estimate the peak rate of
runoff. (An isochrone is a line on the catchment map joining points having equal time of
travel of surface runoff)
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