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The purpose of this page is to define watercourse, a commonly used term in floodplain management.


A watercourse means only the channel and banks of an identifiable watercourse, and not the adjoining floodplain areas. The flood carrying capacity of a watercourse refers to the flood carrying capacity of the channel (except in the case of alluvial fans, where a channel is not typically defined).

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Last Updated: 
05/23/2019 - 08:50