Managing Water Supply

    Cards (9)

    • 3 hard engineering schemes to manage water supply are water transfer schemes, mega dams and desalination plants
    • an advantage of water transfer is it reduces water insecurity, a disadvantage is water stress in source area
    • an advantage of desalination plants is its good for island communities a disadvantage is they are very expensive
    • the case study for water transfer is China and they have invested 79 billion dollars to divert water from Yangtze river in the south to yellow river in the north
      a benefit of this is 100 million people have benefited already
      a negative is floods by Yangtze river due to elevation changes reducing biodiversity
    • 2 sustainable schemes in managing water supply?
      smart irrigation
      recycling of water
    • how has Singapore been managing their water?
      • desalination accounting for 40% of water
      • water pricing system, the more water you use the more expensive it is and vice versa
      • water recycling via high tech UV treatment accounting for 40% of water
    • case study for integrated drainage basin management is Colorado river
      • Colorado River's drainage basin extends out to 7 different states in southwest USA
      • supplies over 40 million Americans with drinking water through dams, reservoirs and irrigation canals
      • 2007, Colorado River Management plan introduced to settle a way of managing the source during drought.
      • rather than divide water equally between states, water was allocated based on size of water deficit of each state
    • an advantage of mega dams is have possibility to increase water security for many people
      a disadvantage is water can be lost through evaporation
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