Drainage Basin
The stream's catchment.
it sounds like a drainage basin
The land area that contributes water to a stream is known as its watershed or catchment area. This area collects rainfall and other sources of water, which then flow into the stream through surface runoff or groundwater discharge. The health and size of the watershed can significantly impact the quantity and quality of water in the stream.
A 'floodplain'.
The flood plain
The land area where a river collects water is known as its watershed or drainage basin. This is the area of land where all the water that falls within its boundaries flows into a specific river or stream.
drainage basin
A stream of water cutting through land is a river.
River, stream, waterway, brook, canal, or watercourse
A River
A river is a large stream of fresh water that flows across land and empties into an ocean, lake, or some other body of water.
which gets hotter land or water