Watershed

An area of land that directs precipitation and snowmelt into streams and rivers, ultimately flowing into reservoirs, bays, or the ocean, is known as a watershed. 

All of the precipitation-related water, whether from rain or snow, runoff in a drainage basin and drains out through a single outlet.

Varieties of Watersheds

Macro-Watershed: Big watersheds, such river basins, that span large geographic areas.

Micro-Watershed: Tinier regions, including those encompassing a lone farmland or a tiny creek.

Sub-watershed: A sub-watershed is a more focused area inside a larger watershed that is made up of a specific tributary or sub-region.