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Chap 5: Floods (Causes (Rainfall intensity, duration, frequency: Increase…

- - - - +: Creates green spaces, which can reduce the impacts of floods
      - -: Limits land uses of a certain area, as the area can only be used for a certain use
      - -: Difficult to carry out, as it relies on the compliance of people
    - - +: Developments are protected up to the height of the MPL
      - -: The increasing costs of development will make it expensive to increase the height of the developments
  - - - +: Cheaper than elevating the height of surrounding land to mitigate floods
      - -: Can only hold back floodwater to a certain extent, unable to hold back more than that
      - -: Regular maintenance is needed to ensure the structures are strong enough to hold back water
    - - +: The areas around the channel can now be used for moderate-value and high-value developments
      - -: May create problems upstream and downstream of the affected area
  - - - +: Provides useful information so people can take action to minimise the impact of floods
      - -: Some countries do not have the technology and resources to have such a system to collect data and make accurate forecasts
    - - +: People learn what to do in the case of a flood
      - +: Allows countries to improve their flood evacuation plans
      - -: Limited participation will reduce the effectiveness