t has a 2-hour unit hydrograph with the ordinates 0, 3, 11, 35, 55, 66, 63, 40, 22, 9 and 2 m3/s. Assume that the base flow at time t = 0 hours is 50 m3/s and linearly increases to 80 m3/s at t = 24 hours. a) Compute the hydrograph resulting from two successive 2-hour periods of effective rain of 3 cm and 4 cm respectively. b) To prevent downstream flooding, the maximum flow to be released from the catchment is set at 280 m3/s. Calculate the space needed to store the excess water in this event (in
t has a 2-hour unit hydrograph with the ordinates 0, 3, 11, 35, 55, 66, 63, 40, 22, 9 and 2 m3/s. Assume that the base flow at time t = 0 hours is 50 m3/s and linearly increases to 80 m3/s at t = 24 hours. a) Compute the hydrograph resulting from two successive 2-hour periods of effective rain of 3 cm and 4 cm respectively. b) To prevent downstream flooding, the maximum flow to be released from the catchment is set at 280 m3/s. Calculate the space needed to store the excess water in this event (in
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A river catchment has a 2-hour unit hydrograph with the ordinates 0, 3, 11, 35, 55, 66, 63, 40, 22, 9 and 2 m3/s. Assume that the base flow at time t = 0 hours is 50 m3/s and linearly increases to 80 m3/s at t = 24 hours.
a) Compute the hydrograph resulting from two successive 2-hour periods of effective rain of 3 cm and 4 cm respectively.
b) To prevent downstream flooding, the maximum flow to be released from the catchment is set at 280 m3/s. Calculate the space needed to store the excess water in this event (in m3).
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