Elements of the Drainage Basin

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  • Elements of the Drainage Basin
    • Inputs
      • precipitation - rainfall, hail, sleet or snow
    • Stores
      • interception by vegetation - when rain is caught on leaves of plants
    • Transfers
      • surface run off - movement of water across the surface ( fastest of impermeable surfaces )
      • infiltration - downward movement of water through soil
      • throughflow - sideways movement of water through the soil
      • percolation - downward movement of  water into underlying rocks if they are permeable
      • groundwater flow - sideways movement of water through the rocks
    • Outputs
      • river discharge - volume of water passing a given point in a river in a given time
      • evapotranspiration - the loss of moisture from the system via evaporation and transpiration

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