A catchment has a size of 100 km2 . In its original condition, the average annual total runoff from the catchment is 1.0m3/s . The average annual rainfall is 800 mm/a . In an average year, 50% of the rainfall infiltrates and only 10% of the rainfall reaches the groundwater . Capillary rise is negligble. a . How much is the evapotranspiration in an average year(neglect the effect of storage)? b . How much water seeps out from the groundwater to the surface water in an average year if you assume that over a year there is no change in storage in the groundwater? c .How much water in mm/s,is used by the vegetation(evaporation from bare soil can be neglected)?

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
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Chapter2: Loads On Structures
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A catchment has a size of 100 km2 . In its original condition, the average annual total runoff from the catchment is 1.0m3/s . The average annual rainfall is 800 mm/a . In an average year, 50% of the rainfall infiltrates and only 10% of the rainfall reaches the groundwater . Capillary rise is negligble.

a . How much is the evapotranspiration in an average year(neglect the effect of storage)?

b . How much water seeps out from the groundwater to the surface water in an average year if you assume that over a year there is no change in storage in the groundwater?

c .How much water in mm/s,is used by the vegetation(evaporation from bare soil can be neglected)?

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