624783
Descrição
Mapa Mental por elenamaymartin, atualizado more than 1 year ago
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Criado por elenamaymartin
mais de 10 anos atrás
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The Three Gorges Dam
- Location
- Yangtze River, China
- Third longest River in the world
- prone to seasonal flooding
- Raining season June-August
- Raining season June-August
- prone to seasonal flooding
- 6380km
- Third longest River in the world
- Yangtze River, China
- General Info
- Major cities
along the
Yangtze
- Wuhan & Nanjing
- Wuhan & Nanjing
- 5 major floods in
the last century
- Flood of 1954 covered 193000 km^2
- Killed 33,169
- 18 Million had to move
- 18 Million had to move
- Killed 33,169
- 1998 Flood killed 3000
- 14 million homeless
- 14 million homeless
- Flood of 1954 covered 193000 km^2
- Most flood
defenses are
made though hard
engineering
- Major cities
along the
Yangtze
- Defenses include Dams and Levees
- 46 Dams being
constructed at
the moment
- Three Gorges Dam
- Work started in 1994
- 101m tall wall
- A reservoir is being
built behind it
- Catches floodwater
- 22km^3
- 22km^3
- Catches floodwater
- Hydroelectric Power station
- 26 turbines built into Dam
- 26 turbines built into Dam
- Locks have been built
along side the dam so ships
can get past
- Work started in 1994
- 46 Dams being
constructed at
the moment
- Negative effects
- People have had to relocate
as water levels behind the
dam have risen
- 13 Cities
- 2 million people
- 1352 villages
- Farmland
- 657 factories
- 1300 sites of cultural & historic interest
- 13 Cities
- Dam will trap sediment
- Could lead to failure
of the dam then lots
of flooding
- Could lead to failure
of the dam then lots
of flooding
- Could destroy habits and
endangered species
- Siberian Crane spends
winter in wetlands of the dam
- -100 baiji dolphins left in Yangtze
- dam could reduce food supply
- dam could reduce food supply
- Siberian Crane spends
winter in wetlands of the dam
- Increased flooding
on tributaries
- Daning River
- Increased erosion on banks
- Daning River
- People have had to relocate
as water levels behind the
dam have risen
- Positive Effects
- reduced major flooding
from once in ever 10
years to every 100 years
- now safer to navigate
up the Yangtze
- River shipping has also increased to
bigger ships as the reservoir is
deeper
- River shipping has also increased to
bigger ships as the reservoir is
deeper
- dam produces lots of electricity
- 22.5 gigawatts
- can cater for 3% of China's demand
- can cater for 3% of China's demand
- 22.5 gigawatts
- reduced major flooding
from once in ever 10
years to every 100 years
- Levees have also
caused problems
- 1998 floods broke causing devastating flooding
- after this
levees were
reinforced
- effective at
reducing flooding
in 2002 floods
- effective at
reducing flooding
in 2002 floods
- after this
levees were
reinforced
- 1998 floods broke causing devastating flooding
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