the drainage basin
Post on 15-Feb-2016
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SPECIFICATION TARGET: know the meaning of the following drainage basin terms: watershed, confluence, tributary, source and mouth.
The drainage basin
• All rivers receive a water supply and the area of land this comes from is known as a drainage basin.
• The boundaries of the basin are known as the watershed and will usually be marked by areas of high land.
River drainage basins• Rivers begin in upland areas and flow downhill, becoming
deeper and wider until they reach the sea. • A drainage basin is part of the water cycle where water is
transferred in a continuous cycle between the sea, atmosphere and the land.
• As the river flows downstream its characteristics change through the three main sections of
The Upper CourseThe Middle CourseThe Lower Course
Drainage basin diagram:
• River basins are an open system with inputs and outputs of water
Any rain falling here will flow within this basin
Main channel
Amazon drainage basin
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