Coastal defences: soft and hard engineering strategies

1. 1Tick the different types of soft engineering

   1. AMarsh creation
   2. BBeach nourishment
   3. CGroynes
   4. DSea walls
   5. EManaged retreat
   6. FRock armour
2. 2Beach nourishment is when sand/shingle is added to the beach

   1. AVerdadero
   2. BFalso
3. 3What is the benefit of beach nourishment?

   1. ACreates wider beaches that slow the waves. It gives a greater protection of flooding and erosion
   2. BOver time the land will become marshland (creating new habitats). Flooding and erosion is reduced behind marshland. Its cheap.
   3. CThey absorb wave energy and so reduces erosion and flooding. Its cheap.
4. 4What are the disadvantages of beach nourishment? Tick two

   1. ACan be moved round by strong waves
   2. BNeeds replacing reguarly
   3. CTaking material from sea bed can kill organisms like sponges.
   4. DThey create a strong backwash, which erodes under the wall.
   5. EExpensive
5. 5Which one of these strategies are hard engineering?

   1. AManaged retreat
   2. BRock armour
   3. CBeach nourishment
   4. DMarsh creation
6. 6Rock armour is the removing of existing defence and allowing land to flood

   1. AVerdadero
   2. BFalso
7. 7Tick the benefits listed below of rock armour

   1. AThey absorb wave energy and so it reduces erosion and flooding
   2. BActs as a barrier to prevent flooding
   3. CCheap
   4. DOver time the land will become marshland (creating new habitats). Flooding and erosion is reduced behind marshland.
   5. ECreates wider beaches which slow the waves
8. 8Which one is the disadvantage of rock armour?

   1. AThey create strong backwash, which erodes under the wall.
   2. BCan be moved around by strong waves, needs replacing regularly.
9. 9What is marsh creation? Soft or hard engineering

   1. ASoft engineering
   2. BHard engineering
10. 10Marsh creation involves planting vegetation in mudflats along the coast

    1. AVerdadero
    2. BFalso

11. 11Which two is the benefits of marsh creation?

    1. AVegetation stabilises the mudflats (creating new habitats) and helps to reduce the speed of the waves
    2. BCreates wider beaches which slow the waves.
    3. CCheap
    4. DOver time the land will become marshland (creating new habitats). Flooding and erosion is reduced behind marshland.
    5. EProtects from flooding and erosion.
12. 12Tick the disadvantages of marsh creation

    1. AMarsh creation isn't useful where erosion rates are high because the marsh can't establish itself. Its expensive.
    2. BStarves the beaches further down the coast making it narrower. It doesn't protect.
13. 13Managed retreat is hard engineering

    1. AVerdadero
    2. BFalso
14. 14Managed retreat is...

    1. AMade out of a hard material like concrete that reflects waves back into sea
    2. Bthe removing of existing defence and allowing land to flood.
    3. CWooden fences that are built at right angles to coast. They trap material transported by longshore drift.
    4. DPlanting vegetation in mudflats along the coast.
15. 15The benefits of managed retreat are that it creates wider beaches which slow the waves. It has a greater protection of flooding and its cheap.

    1. AVerdadero
    2. BFalso
16. 16Tick the right disadvantage that goes with managed retreat.

    1. AStarves beaches further down coast making it narrower. It doesn't protect from flooding.
    2. BThey create strong backwash, which erodes under the wall. Expensive to build and maintain. Expensive.
    3. CPeople disagree on what land they should flood e.g farmland
17. 17What type of engineering does groynes go under?

    1. ASoft engineering
    2. BHard engineering
18. 18What is a groyne?

    1. AA wall made out of hard material like concrete that reflects waves back into sea.
    2. BA wall made out of fencing, built at right angles to the coast. They trap material transported by longshore drift.
19. 19Tick all the different benefits for groynes

    1. ACreates wider beaches which slow the waves down
    2. BVegetation stabilises the mudflats and helps to reduce the speed of waves.
    3. CGreater protection of flooding
    4. DCreates new habiatats
    5. ECheap
    6. FOver time the land will become marshland (creating new habitats)
20. 20Disadvantage of Groynes are...

    1. ACan be moved around by strong waves so they need replacing
    2. BTaking material from sea bed can kill organisms like sponges. Its expensive
    3. CStarves beaches further down the coast making it narrower. It doesn't protect from flooding.
21. 21Marsh creation is soft engineering

    1. AVerdadero
    2. BFalso
22. 22Marsh creation involves...

    1. Aplanting vegetation in mudflats along the coast
    2. BBuilding walls made out of hard material like concrete which reflects back into sea.
    3. CAdding sand/shingle to beaches
    4. DBuilding wooden fences at right angles to coast. They trap material transported by longshore drift.
23. 23Tick the following choices which are advantages of marsh creation

    1. AAct as a barrier to flooding
    2. BCreates wider beaches which slow the waves. Greater protection of flooding. Its cheap.
    3. CVegetation stabilises the mud flats and helps to reduce the speed of waves.
    4. DProtects from flooding and erosion.
    5. ECreates new habitats
24. 24The disadvantage of a marsh creation is they create a strong backwash which erodes under the wall. Expensive to build and maintain.

    1. AVerdadero
    2. BFalso
25. 25Sea wall is soft engineering

    1. AVerdadero
    2. BFalso
26. 26What does the sea wall do that benefits the coast?

    1. AThey prevent erosion of the coast. Also acts as a barrier to prevent flooding.
    2. BCreates wider beaches that slow the waves. Gives greater protection of flooding and erosion.
27. 27Disadvantage of sea wall is they create a strong back wash which erodes under the wall. Its expensive to build and maintain.

    1. AVerdadero
    2. BFalso

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Test sobre Sin título, creado por isabellerutland2 el 14/06/2015.

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Creado el 14 jun 2015 · actualizado el 19 feb 2016

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