Hydrological characteristics and processes which operate in rivers and drainage basins.
Drainage basin and water divide is the area drained by a main river and its tributaries, bounded by a watershed. Components of a drainage basin are main stream, tributaries and distributaries, wetland and estuary (mouth of a river which is tidal), the exit of the basin (where the waters join another water body such as a river, lake, sea, or ocean). Watershed or water divide is an imaginary line that separates adjacent drainage basins. It is generally a highland or ridge or plateau.
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