Hydrology - Case Studies

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  • Created by: HPG
  • Created on: 04-04-24 16:48
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  • Hydrology - Case Studies
    • Soil Budget Graph
      • Malaga
        • Fruit and Veg for the tourist industry
          • Evaporation exceeds precipitation from April to October
            • Deficit from June to October = Crops cant grow without irrigation
    • Factors Affecting a Drainage Basin
      • Precipitation
        • The Ganges
          • 110 cm of rain a year
            • Monsoon season June to October
              • Monsoon Season Peak = 36,000 M^3 Discharge
              • Outside monsoon season = 1,000 M^3
      • Snowmelt
        • Rocky Mountains - Colorado River
          • High levels of snowfall in winter that gathers on surface
            • Thaw begins in Spring = Snow melts and goes into tributaries
              • January - 200 M^3
              • June - 2,300 M^3
      • Vegatation
        • Amazon River
          • Canopy of rainforest can have interception rates of up to 50%
            • Reduced overground flow
      • Land Use
        • London
          • 600-700 mm a year
            • Impermeable surfaces such as concrete
              • This mixed with drainage transports water quickly to the Thames
      • Relief/Shape
        • Boscastle
          • Steep relief on the sides of the village of Boscastle in 2004
            • Infiltration couldn't occur
              • Water quickly filitered downwards = Discharge quick peak
    • Soil and Rock Type
      • River Avon
        • Chalk - Permeable
      • River Dart
        • Granite - Impermeable
    • Deltas
      • Arcuate
        • Niger Delta
        • Fan Shaped - Low tidal Range - Sediment moving in one direction
      • Cuspate
        • Arrowhead shape - Low Tidal Range - two offshore currents -
        • Ebro Delta - Barcelona
      • Birds Foot
        • Low Tidal Range - River current is strong - no clear offshore current
        • Mississippi Delta - Gulf of Mexico
          • Gulf weakens the current and tidal range
          • Mississippi river third largest discharge in the world
    • Human Impact - Hydrological Cycle
      • Precipitation - Cloud Seeding
        • Artificial particles are added to air so large water droplets can attach
        • Australia
          • Increased rainfall by 10-30% in rural areas
            • Aided Farming
      • Water Storage - Dams Etc
        • 48,000 Dams in the world
        • Aswan Dam
          • Has reduced water flowing through the nile in Egypt
            • The resovoir behind the Dam loses 30% of the niles water through Evaporation
      • Transfer Schemes
        • UK
          • Kielder Resovoir on the border of Scotland and England is transported to London

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