2. • Country CHINA.
• Location SANDOUPING,YILING,HUBEI.
• Type of Dam GRAVITY DAM..
• Impounds YANGTZE RIVER.
• Total Water storage Capacity 39.3 km3.
• Turbines 32x700 MW and 2x50 MW Francis
type.
• Symbol of Chain's Engineering.
4. Yangtze River Location
The Yangzi is the longest river in Asia and the third longest in the world,
stretching nearly 4,000 miles across China. The world's longest river is the
Nile; the second longest is the Amazon
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5. Reasons to Build Dam
1.Improve navigation along the Yangtze
River.
2.Major Highway for movement of coal, other
goods and people
3.Prevent seasonal flooding which used to
cause loss of life and property along river
.
4.Provide hydroelectric power desperately
needed energy for growing population
5.Reduce dependence on coal with
environmental and health and safety issues
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6. Environmental Impact.
Water Pollution.
Ecosystem.
Deforestation.
Landslides.
Sedimentation.
Economical Problem.
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7. Before and After the dam
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8. Water Pollution
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9. • The main Yangtze River is one of the most polluted
waterways in the world due to coal shipping, acid rain,
and its location in the heart of industrial China.
• 265 billion gallons of raw sewage are dumped into the
river annually .
• Because of the dam prevents any of this material to be
washed out of sea, water quality become much worse
since construction of the dam began .
• It was the only water source for millions of residents
around the dam area, and the life quality decrease.
• When the TGD is fully operational, there will be
significant changes in water temperature, silt levels, and
seasonal flow fluctuations.
• Additionally, breakdown of vegetation, silt, and other
organics at the bottom of the reservoir will release
significant amounts of greenhouse gasses (GHG).
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12. • Large dams decrease the temperature and oxygen
level in the water below the dam, which affects
fish and other animals that live downstream.
• The dam effect the life of 300 spices of fish.
• It include Chinese River Dolphin and Chinese
Sturgeon, Siberian cranes .
• The dam create a barrier across the river , so the
fish can't cross the river and it effect the
population of the fish spices.
• The Chinese government plan to sustain the river
Dolphin and other endangered spices by creating
natural reveres and artificial spawning program.
And this attempt to relocate Dolphin was failed.
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14. Resettlement
Issues
1 .China’s highest state body warned that the Three Gorges
Project has “caused some urgent problems in terms of
environmental protection, the prevention of geological
hazards and the welfare of the relocated communities.”
2 .Some villagers in Fengjie Country were relocated to a
new village site less than a mile away but were not given
enough compensation to get new housing
3 20,000 people have just been relocated for the second
time due to this project.
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15. Deforestation and Landslide
Deforestation was take place for the construction
of the dam Reservoir and for relocating the people
who live it that dam area.
The Yangtze rive surrounding is already unstable
before building the dam.
Because all the lands are located on the steep
slopes of the Gorges.
After the deforestation increased the risk of
Landslides , because of this residents are forced to
relocate for second time.
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17. Sedimentation & Economical Problems
Because of reduced water speed behind the dam, an
estimated 530 million tons of silt will accumulate
behind the dam.
By increase in siltation cause its is impossible for
shipping.
Due to the water pollution the dam will have a serious
impact on the fishing economy of the Yangtze river.
It cause block the sluice gates which control the water
level behind the dam , cause more flooding to occur
upstream during raining.
Due to this the nutrients not reach the down stream
fertile farm land, so decrease fertility.
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18. Loss of Historical Sites and Treasures
1 .Destroyed 1300 archeological sites
2 Flooded many historical sites.
Example : Ba Civilization , Ancient
Fossils at Dragon Bone Cave .
Shibaozhai Temple , Zhang Fei
Temple .
3 Reduced tourism. 07 November2014
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19. Earthquake Tremors
The Three Gorges Dam sits on two major earthquake
fault lines.
In 2006 over seven months, scientists recorded 822
tremors around the reservoir
Reservoirs are know to have triggered earthquakes all
over the world.
While the dam is built to withstand a strong
earthquake( withstand an earthquake of 7.0 on the
Richter scale ), the houses, schools, and buildings along
the river are not and millions are in danger.
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21. 1. Environmental degradation leads to an impoverished
society.
2. The environmental impact lead to the social instability.
3. Example water pollution cause the decrease in life quality
of peoples.
4. Sedimentation effect the agricultural field.
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22. REFERANCE
o YOU TUBE https://www.youtube.com/watch?v=YtgOntg0ofc AND
https://www.youtube.com/watch?v=b8cCsUBYSkw
o www.globalchange.umich.edu/globalchange2/.../China's%20Dams.p
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pt
o Wikipedia.
