Drainage basin hydrological cycle.
- Drainage basin = catchment area- river system obtains its water.
- Watershed = delimits one drainage basin from another- follows a ridge of high land- any rain falling on the other side of the ridge = flow into another river - adjacent drainage basin.
The drainage basin hydrologicals system = open system = inputs and outputs.
- Move moisture out of the drainage basin
- Evaporation and transpiration from plants (collectively called evapo-transpiration)
- Runoff into the sea
- Water percolating deep into underground stores = effectively lost from the system
- On the surface - glaciers, lakes, rivers, puddles
- Vegetation stores water by interception and plants
- The soil can hold water
- Groundwater is stored in permeable rocks
- Moves water through the system
- Enable inputs of water to be processed - one store to another
- Throughfall, stemflow, infiltration, throughflow and groundwater flow.
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