River Discharge, Storm Hydrograph

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  • Created by: Sharon
  • Created on: 08-04-15 13:48
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  • Factors affecting River Discharge: storm hydrograph
    • Human
      • LAND USE
        • Impermeable services = less lag time, increased peak discharge
      • URBANISATON - compaction of ground, building roads, drainage, river straightening.
        • Reduce lag time, Increase peak discharge
    • Physical
      • Vegetation
        • Summer = more leaves = more interception = lower discharge
      • Temperature
        • Increased evaporation reduced discharge.  Cold = frozen ground increasing discharge
      • Slope Angle
        • Bigger slope = less lag time and steeper rising limb.
      • Shape of Basin
        • Rainfall reaches river quicker in round rather than elongated.
      • Size of Basin
        • Small basin = shorter lag time.
      • Impermeable Rock
        • Increase in discharge
      • Snow
        • Once landed, heated and increases discharge.
      • Intensity
        • If high, high rising limb.
      • Antecedent Rainfall
        • Henry rainfall on saturated soil = steep rising limb

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