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      Costs and benefits of river management strategies

      Lesson details

      Learning outcome

      I can assess the costs and benefits associated with hard and soft engineering strategies used to manage river flooding.

      Key learning points

      1. Use of hard engineering strategies to manage rivers.
      2. Use of soft engineering strategies to manage rivers.
      3. There are costs and benefits associated with each type of river management strategy.

      Keywords

      • Sustainable - meeting the needs of the present without compromising the ability of future generations to meet their own needs

      • Hard engineering - use of artificial structures and technologies to control natural processes, such as flooding or river erosion

      • Soft engineering - uses natural processes and landscape features to reduce the risk of flooding and erosion

      Common misconception

      Hard engineering is always better than soft engineering.

      While hard engineering can be effective, it is not always the best choice due to cost and environmental impact. Soft engineering can be more sustainable and less intrusive.

      Teacher tip

      Use case studies to show real-world examples of cost-benefit analysis in action.

      Licence

      This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      Which process is responsible for the wearing away of the coast by wave action?

      Deposition
      Transportation
      Correct answer: Erosion
      Evaporation

      Q2.
      What is the correct order of a river's course from source to mouth?

      Correct answer: Upper course → Middle course → Lower course
      Middle course → Upper course → Lower course
      Lower course → Upper course → Middle course
      Source → Sea → Meander

      Q3.
      Which of the following landforms is created by glacial erosion?

      Spit
      Meander
      Correct answer: U-shaped valley
      Floodplain

      Q4.
      How is a meander formed?

      By deposition only
      By freezing and thawing
      By wind erosion
      Correct answer: By both erosion and deposition

      Q5.
      What is longshore drift?

      The movement of glaciers downhill
      Erosion by rainfall
      Correct answer: The movement of sediment along a coast by wave action
      Rivers flowing into the sea

      Q6.
      Which of the following is a glacial depositional feature?

      Corrie
      Correct answer: Moraine
      Arete
      U-shaped valley

      4 Questions

      Q1.
      What is the main goal of river management strategies?

      Increase river depth
      Correct answer: Reduce the risk of flooding and erosion
      Improve fish populations
      Build more reservoirs

      Q2.
      Which of the following is an example of soft engineering?

      Embankments
      Dams
      Correct answer: Floodplain zoning
      Channel straightening

      Q3.
      Why might soft engineering be considered more sustainable?

      Correct answer: It works with natural processes and is often cheaper
      It uses more concrete
      It guarantees zero flood risk
      It reduces river depth

      Q4.
      Why isn't hard engineering always the best solution?

      It increases flood risk
      It is illegal in many countries
      Correct answer: It can be expensive and environmentally damaging
      It prevents sediment from forming beaches

      To help you plan your 10 geography lesson on: Costs and benefits of river management strategies, download all teaching resources for free and adapt to suit your pupils' needs...