... were placed along the river in order to hold back the water and therefore provided flood control. Even though this channelisation worked upstream, the water continued to flood downstream, causing just as many problems and damage. This is why hard engineering is seen as unsustainable. When channelisation was put into place, habitats and ecosystems were destroyed to make way. Also this sort of solution is never permanent and thus it always needs to be maintained. This will be very expensive and at the end of it migration will still take place, not solving the problem. Recently, rainfall has increased due to climate changes and therefore the rivers are more likely to flood, as there is a higher amount of water. Lastly due to and overall global rise in population, more people are being forced to live on floodplain land, as there is no space. This puts a lot of pressure ...

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