drainage basin

Noun
  1. is a type of: geographic area, geographic region, geographical area, geographical region - a demarcated area of the Earth
    subtypes:
    • detention basin - a storage site (such as a small reservoir) that delays the flow of water downstream
    • retention basin - a storage site similar to a detention basin but the water in storage is permanently obstructed from flowing downstream
    same as: basin, catchment area, catchment basin, drainage area, river basin, watershed

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