Because it is the land area that supplies water to a river system :)
stream piracy
A nested watershed is simply a watershed within a watershed. An example might be the Platte River watershed which is a nested watershed within the Missouri River watershed which in turn is nested within the Mississippi River watershed.
the main river and all of its tributaries are called a river system. The land drained by the river system is called a drainage basin. Drainage basins are separated by the high land in between, known as a divide or watershed.
oceans are mass lands cover with water in Greek it is called Pangea.
Watershed.
Mississippi River
A watershed is composed of different sources of water that all run together. This might include a lake and river system.
James River Watershed
The land and water that drain into a river system are collectively referred to as its watershed or drainage basin. This area includes all the surface water, such as streams and rivers, as well as groundwater that contributes to the flow of the river. The watershed is crucial for managing water resources, influencing water quality, and supporting ecosystems within the river system. Activities within the watershed can significantly impact the health and sustainability of the river.
a watershed, also called a drainage basin, is an area drained by a river.
The catchment is the correct answer. Commonly folk say 'watershed' but the watershed is the boundary (ridges etc) of the catchment.
* The Roanoke River Watershed. * The Middle James River Watershed, * The Rappahanock RiverWatershed.