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Competency Area 6: Watershed hydrology AEM

PO 56. Describe a watershed and its main functions.

A watershed, drainage basin, or catchment is an area of land from which surface runoff (and subsurface recharge, and groundwater usually) flows to a common discharge outlet. The main functions of a watershed are:

  • The collection and redistribution of water
  • Providing a diversity of soils, vegetation, and landscape features to support life functions of insects, animals and humans. A watershed's development and basic features or morphology characteristics result from climate and geologic interactions over long time periods.