Preventing floods

• floodplain zoning


  avoiding bruising on the floodplain and putting higher value land users away from the river
• afforestation 


  planting more trees upstream to unexpected more rainfall slowing down its journey to the river
• change the shape of the river channel 


  by widening and deepening the river through dredging, the capacity to store water is increased
• flood embankment


  raising the banks of the river makes the capacity of the river channel larger in the event of a flood, protecting land on the other side
• building a dam


  the dam holds ba k the flow of the di et in a reservoir allowing storage of floodwater and then releases it slowly downstream