655140
Descripción
Mapa Mental por natalie633, actualizado hace más de 1 año
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Creado por natalie633
hace más de 12 años
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Flood management strategies
- Hard engineering
- What are they? Man
made structures
- Overall disadvantages
- Expensive to build and
mantian and need technical
skill
- If dam breaks then a huge
amount of water will rapidly
flood the land
- Natural processes are disrupted
- Crops don't get fertile silt
from river sediment during
low leving flooding
- Crops don't get fertile silt
from river sediment during
low leving flooding
- Dont look good
- Expensive to build and
mantian and need technical
skill
- What are they? Man
made structures
- Dams
- What are they? Huge walls built acorss river, flood water
is caught by dam= prevnts floods
downstream water, relased steady
throughout the year
- Disadvantages
- Affect wildlife- pevent
salmon migrating upstream
to breeding ground
- They're very expensive
- Destroys farmland and forces
people to move elsewhere
- Affect wildlife- pevent
salmon migrating upstream
to breeding ground
- Disadvantages
- Advantages
- Turbines often built into
dams- produce elctricity
- Can use reservoir
for recreational
activities
- Turbines often built into
dams- produce elctricity
- What are they? Huge walls built acorss river, flood water
is caught by dam= prevnts floods
downstream water, relased steady
throughout the year
- Channel straightening
- Meanders removed , makes water flow
faster reduces flooding because water
drains downstream more quickly doesn't build up
- Advantage
- less time to navigate the
river because it has been
made shorter
- less time to navigate the
river because it has been
made shorter
- Disadvantages
- Flooding may happen
downstream instead as
flood water is carried
there faster
- More erosion occurs downstream
- Flooding may happen
downstream instead as
flood water is carried
there faster
- Meanders removed , makes water flow
faster reduces flooding because water
drains downstream more quickly doesn't build up
- Levees
- Embankments built
along rivers- river can
hold more water
without overflowing
- Advantages
- Allow flood plain to be built on
- Allow flood plain to be built on
- Disadvantages
- Quite expensive
- If leeves are
breached risk of
severe flooding
- Quite expensive
- Embankments built
along rivers- river can
hold more water
without overflowing
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