In a sense, a delta is made from the land drained by a river. Fine particles of earth are washed down the river to its mouth. At the mouth, the waters are calmer, and many of the particles drop out to the bottom of the sea, building the land up. Vegetation that can live at the edge of the sea build it up more. Tides and floods build it up more. Eventually the land mass at the mouth of the river is extended in this way. The source of the earth that is at the delta, is the earth washed from the drainage area of the river.
basin
A river basin is an area of land drained by a river and its tributaries.
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.
a watershed, also called a drainage basin, is an area drained by a river.
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.
An area of land that drains to one river (or a river and its tributaries) is a drainage basin or watershed.
It is called a delta.
it is called a delta
A delta.
Drainage Basin: The Area of Land Drained By A River.
watershed