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How Does Urbanization of the Upstream Drainage Area for a Floodplain

Question 40

Multiple Choice

How does urbanization of the upstream drainage area for a floodplain affect the 100-year flood level?


A) It lowers flood height, since the water runs through faster.
B) It raises flood height.
C) It decreases duration of the peak flood level.
D) The downstream extent of the highest flood level will be less.
E) There is no change; the flood level only depends on the total rainfall upstream.

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