river basin

Water collection zone

A river basin is the entire area of land drained by a river and all its tributaries—every stream, creek, and rivulet that eventually feeds into the main river.

The basin is defined by topography: rain falling anywhere within it flows toward the same outlet.

The Amazon basin covers nearly three million square miles.

Also called a drainage basin or watershed.

Related

hydrography · confluence · aquifers · fresh water · drinking water · snowmelt · dam construction · fish · reservoir · irrigation · alluvial · sediment · canyon · valley · gorge · mouth · meandering · catchment

Categories
Opposites
hydrological feature type

river basindrainage divide

Boundary separating river basins

continental divide · ridge line · mountain crest · headwaters · river delta

water system scale and structure

river basinriver channel

Path carved by flow

creek · rivulet · brook · watercourse · stream bed

landscape hydrology

river basindesert plateau

Elevated flatland in arid region

mesa · tableland

Family

river, basin, derive, rivers, watershed, tributary, rivulet, riverbed, streambed

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