A catchment area of 150km 2 received a 150 cm of rainfall in a year. At the outlet of the catchment the flow in the stream draining the catchment was found to have an average rate of 2.0m 3 /s for 3 months, 3.02.0m 3 /s for 6 months and 5.02.0m 3 /s for 3 months. (a) what is the runoff coefficient of the catchment? (b) If the afforestation of the catchment reduces the runoff coefficient to 0.50, what is the increase in the abstraction from precipitation due to infiltration, evaporation and transpiration, for the same annual rainfall of 150 cm.
A catchment area of 150km 2 received a 150 cm of rainfall in a year. At the outlet of the catchment the flow in the stream draining the catchment was found to have an average rate of 2.0m 3 /s for 3 months, 3.02.0m 3 /s for 6 months and 5.02.0m 3 /s for 3 months. (a) what is the runoff coefficient of the catchment? (b) If the afforestation of the catchment reduces the runoff coefficient to 0.50, what is the increase in the abstraction from precipitation due to infiltration, evaporation and transpiration, for the same annual rainfall of 150 cm.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A catchment area of 150km 2 received a 150 cm of rainfall in a year. At the
outlet of the catchment the flow in the stream draining the catchment was
found to have an average rate of 2.0m 3 /s for 3 months, 3.02.0m 3 /s for 6
months and 5.02.0m 3 /s for 3 months. (a) what is the runoff coefficient of the
catchment? (b) If the afforestation of the catchment reduces the runoff
coefficient to 0.50, what is the increase in the abstraction from precipitation
due to infiltration, evaporation and transpiration, for the same annual rainfall
of 150 cm.
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