Management of rivers

• Dams


  Traps sediment

  
  

  Carries more water

  
  

  Prevents flood water from spilling over banks

  
  

  Dams are found where the rock/soil is strong enough to support weight

  
  

  Built to control rivers so they dont flood
• Resevoirs


  Used to control amount of water flowing in a river after heavy rain

  
  

  Water level in R kept low during rainier periods of the year
• Embankments

  Raises banks of river so holds more water

  
  

  Reduces risks of flooding
• Channelisation


  Deepens/straightens river

  
  

  Water is moved away quickly

  
  

  Long lasting
• Afforestation

  Planting of trees to increase forest cover
• Levee

  Raised banks formed on banks of river
• Groynes

  Wooden barrier built out onto the sea to reduce erosion
• Storage areas

  A large depression close to the river that will fill with water if it overflows
• Floodwalls

  Vertical barrier usually made from prefabricated concrete