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Fuenciado
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I was going through some example questions and I had a 10 mark question:
Describe the physical impacts of flooding on a drainage basin

Anyone got any ideas on this? I have the obvious points: Erosion, waterlogged plants, food chain destroyed, habitats ruined.

But that's not really worth 10 marks and I can't really fit any case studies into it because the impacts are mostly social/economic....
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TheDimpleboy
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Impacts of flooding on a drainage basin? Erm:
Habitats: + It can result in the creation of wetlands if the river captures some of the surrounding land, which can be home to plants such as Rushes and Reeds, as well as animals such as frogs etc.
- It can kill animals, and destroy the habitat of plants and animals in the immediate area, for example plants that are perennials will not be able to cope with heavy submergence.
Features: + As the river floods into drainage basin, friction increases, so velocity decrease, so competence and capacity decrease leading to the deposition of alluvial sediment which improves fertility.
+Above reasons result in the formation of levees which can act as a flood defence against future high discharge levels.
- Uprooting of trees =more flooding in future.
Basically you only need a few points, you just need to explore them in detail. Hope this helped.
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Fuenciado
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(Original post by TheDimpleboy)
Impacts of flooding on a drainage basin? Erm:
Habitats: + It can result in the creation of wetlands if the river captures some of the surrounding land, which can be home to plants such as Rushes and Reeds, as well as animals such as frogs etc.
- It can kill animals, and destroy the habitat of plants and animals in the immediate area, for example plants that are perennials will not be able to cope with heavy submergence.
Features: + As the river floods into drainage basin, friction increases, so velocity decrease, so competence and capacity decrease leading to the deposition of alluvial sediment which improves fertility.
+Above reasons result in the formation of levees which can act as a flood defence against future high discharge levels.
- Uprooting of trees =more flooding in future.
Basically you only need a few points, you just need to explore them in detail. Hope this helped.
Thanks, it was interesting but the exam was on monday

but thank you anyway
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