le Marais
flooding.
an area drained by a river is called pooo lol
A Basin
basin
an area drained by the river .
a watershed, also called a drainage basin, is an area drained by a river.
The river that separates them is the Seine River.
The Seine RiverThe River Seine.
river basin
River Basin
river or lakes duhhh
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The area drained by a river and its tributaries.