geography drain basin and erosion

The drainage basin

A drainage basin is an area of land where all flowing surface water converges to a single point

Water source

An area or ridge of land that separates waters flowing to different rivers,basins or seas

Source

Where a river starts ,usually in the mountains

Tributary

A river or stream flowing into a large river or lake

Confluence

Where two rivers of similar size meet

Mouth

Where the river enters the sea

The four types erosion ?

Abrasion

Attrition

Solution

Hydraulic action

Abrasion

Material carried by the river bump into each other and so are smoothed and broken down into smaller pieces

Attrition

The acids in the water slowly dissolve the bed and the banks

Hydraulic action

Rocks and stones and sand in the water act like sand paper.they scrape the river bed and banks and Wear them away

Solution

Water is forced into cracks in the bank over time this breaks the bank