The drainage basin system is the land based part of the hydrological cycle. A drainage basin is the area of land drained by a river. When water reaches the surface it may take a series of different routes to reach the river (see diagram below).
You will also need to learn about changes to the drainage basin system - for example what would happen if part of the drainage basin was to be built on? What would happen if trees were removed? etc.
You must make sure that you learn the named features of a
drainage basin!  |
Source - the start of a river Mouth - the end of a river Tributary - a small river feeding the main river Confluence - where two rivers meet Watershed - the edge of a drainage basin
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