Flood defences
- Created by: magnus29t
- Created on: 24-10-22 12:56
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- Flood Defences
- Hard Engineering
- Channel Straightening
- Reduce flood risk by keeping water flowing through quickly
- Downstream areas are more at risk due to high water velocity
- Dams and Reservoirs
- Reduce flood risk by filling extra rainfall
- Expensive and destroys habitats and towns when built
- Embankments
- Reduce flood risk by increasing river capacity
- Expensive and can still burst
- Flood relief channels
- River discharge falls because of diversion
- River discharge will increase at junction between relief channel and the river it links up to
- Channel Straightening
- Soft Engineering
- Planting Trees
- Increase proportion of rain that's intercepted, increasing log time
- River discharge, flood risk, and soil erosion reduced
- Wildlife new habitat
- Preparation
- Building house on stilts
- Reduce financial and personal impact
- Can be expensive
- Flood warnings
- River restoration
- Allows river to swell its banks and flood the flood plain naturally
- Doesn't do much to stop flooding
- Flood Plain Zoning
- Fewer impermeable surfaces- flooding is less common
- Involves having smaller towns and cities, increasing house prices and create a shortage.
- Planting Trees
- Hard Engineering
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