Features of a drainage basin, including watershed and channel network.

Drainage Basin: An open system (the amount of water varies) in a river

Catchment area: the area within the drainage basin

Watershed: the edge of highland surrounding a drainage basin. It marks the boundary between two drainage basins

Source: the beginning or start of a river e.g a spring or boggy area

Confluence: the point at which two rivers or streams join

Tributary: a stream or smaller river which joins a larger stream or river

Mouth: the point where the river comes to an end, usually when entering the sea.

Channel Network: the pattern of linked streams and rivers within a drainage basin

Drainage Density:

Drainage density = sum of length of all the rivers ÷ area of drainage basin

The drainage density is highest in the top half of the picture. This is shown through the number of rivers and the information about the rock type.