Mississippi
- Created by: aisling15
- Created on: 02-03-21 22:32
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- Mississippi
- Background
- Has one of the largest drainage basins in N. America
- Drains water from 1/3 of the USA
- The river is important for shipping
- It is important for Hydroelectric power
- Important for drinking water
- When it flooded in 2011 around 25,000 people where evacuated.
- Cost of the damage to property was $3 billion
- Hard Engineering
- Levees- built to 15m and for 300km along the river
- Levees are partly blamed for 2011 flooding
- The levees protected the area where they were built but pushed the problem down stream
- After a flood silt is deposited on the channel bed instead of the floodplain
- As a result normal water level is higher than the flood plain
- Part of New Orleans are 4.3m below river level increasing risk of flood damage
- As a result normal water level is higher than the flood plain
- Levees are partly blamed for 2011 flooding
- Dams
- Over 100 dams ahve been built
- Dames trao silt prevent it reaching the delta or enriching the farnland
- This has resulted in the Heron being endangered.
- More fertiliser is need for farmland
- Dames trao silt prevent it reaching the delta or enriching the farnland
- Over 100 dams ahve been built
- Straightening the Channel
- 1750km of the channle were straightened to make teh river flow faster
- Making the river flow faster
- The river naturally erods aand the natural shape resumes as a result money and time are wasted
- Plants, animals and fish lose their habitats
- Making the river flow faster
- 1750km of the channle were straightened to make teh river flow faster
- Levees- built to 15m and for 300km along the river
- Soft engineering
- Afforestation
- Tree planting in Tennessee Valley as trees absorbs water
- prevents water from reaching the river
- Helps prevent soil erosion
- Provides wildlife habitats nd opportunities for recreation
- Safe flooding zones
- Houses near the flooding zone are bought and demolished, for example, Rock island
- The area is turned into a greenspace-
- Untitled
- The area is turned into a greenspace-
- It is cheaper in the long tern to prevent damage than compensate
- Houses near the flooding zone are bought and demolished, for example, Rock island
- Afforestation
- Background
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