James River
River Basin
A Basin
Basin
basin
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.
Delta
river basin
that is what is called a basin
A small river or stream is not called a river basin. A river basin is a portion of land drained by a river and it's tributaries. It encompasses all of the land surface dissected and drained by streams and creeks that flow downhill into one another, and eventually into one river.
Basin
Basin
a watershed, also called a drainage basin, is an area drained by a river.