Land drained by a river is a watershed. This is an area of land that feeds all the water running under it and draining off of it into a body of water.
a watershed, also called a drainage basin, is an area drained by a river.
a drainage basin
It is Basin.
Drainage basin.
An area of land that drains to one river (or a river and its tributaries) is a drainage basin or watershed.
lake
Basin
river
basin
a watershed, also called a drainage basin, is an area drained by a river.
the land drained by a river system
Basin
A river basin is an area of land drained by a river and its tributaries.
It is an area of land that is drained by a river. It is also a ridge or elevated area of land that divides two areas of land that are drained by two river systems.
A tract of land that is drained by a river and its tributaries.