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
Basin
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.
a watershed, also called a drainage basin, is an area drained by a river.