Watershed

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Watershed

Watershed (/ˈwɔːtərˌʃɛd/), also known as a drainage basin in hydrology, is a land area that channels rainfall and snowmelt to creeks, streams, and rivers, and eventually to outflow points such as reservoirs, bays, and the ocean.

Etymology

The term "watershed" is a compound word derived from the Old English words "water" and "scead," which translates to "water divide." It was first used in the geographical sense in the late 1800s.

Definition

A watershed is a geographical area that collects all the water falling within it, directing it towards a common outlet such as a river, lake, or ocean. This includes not only rainwater but also the water from melting snow and ice. Watersheds can vary in size, ranging from a few acres to thousands of square miles.

Related Terms

  • Catchment Area: This is another term for a watershed. It refers to the area of land where water from rain or snow melt drains downhill into a body of water.
  • Drainage Divide: This is the boundary that separates neighbouring drainage basins.
  • Hydrology: This is the scientific study of the movement, distribution, and management of water on Earth and other planets, including the water cycle, water resources, and environmental watershed sustainability.
  • Runoff (hydrology): This is the movement of water that occurs when excess stormwater, meltwater, or other sources flow over the Earth's surface.

See Also

External links

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