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Urban Drainage - Coggle Diagram

- - - - Dredging is where sediment is removed from the river channel so it has more volume and can hold more water to prevent future planning
      - Dams and Reservoirs, dams can manipulate water flow and transfers to reduce flooding and reservoirs can be used as a water supply
        
        However although this is effective dam construction can cause lots of environmental damage
      - Flood defences and water channel management this means either altering the course of the river to make it straight (River Straightening), building flood walls and drainage systems