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An area of land surrounded by water is an island
An area of water almost completely surrounded by land could be a gulf or bay.
Drainage Basin: The Area of Land Drained By A River.
Valleys are typically found between mountains or mountain ranges, as the lowest point of land. A valley may be an area of flatter land, or rolling landscape, or may contain a river at its lowest center area, with or without flatter land beyond the river's shores.
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A drainage basin/ watershed.
Because it is the land area that supplies water to a river system :)
it is the land area of water which has around water
This is the 'river catchment'.
watershed
I believe its called a water shed but I'm not completely sure about that.AnswerA watershed (one word) is a ridge or other dividing line between stream catchments, although the term is (confusingly) also applied to the catchment area. Another term is drainage basin.
A water catchment area.
Drainage basin
A water catchment area.
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.
Because it is the land area that supplies water to a river system :)
drainage basin!!