What is a drainage basin (watershed)? A drainage divide?
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What is a drainage basin (watershed)? A drainage divide?
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Drainage basin
A drainage basin is an area of land where precipitation collects and drains off into a river, bay, or sea. The drainage basin includes all the surface water from rainwater, snow-melting, hail, sleet, and nearby streams that run downslope as well as the groundwater underneath the earth's surface. Drainage basins connect into other drainage basins at lower elevations.
Other names of the drainage basin are catchment area, catchment basin, or drainage area. The drainage basin is usually called a watershed in North America.
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