Gorges 3 dam: human, social and ecological impact

[dedeleco]

The worst is the absence of alluvium in the delta far below the dam which stops everything, and then this delta without alluvium, not supplied with sediment, sinks inexorably under seawater for centuries, from the beginning of the dam, which in a century will be full of sediment, will no longer be able to regulate floods, and will not be able to be destroyed (if not canyon in the sediments trapped by the dam, when the dam is removed) !!
True already for Shanghai which descends under water (report by Arte), the Nile and also the Rhône delta !!

[Christophe]

The worst is the absence of alluvium in the delta, which then sinks inexorably underwater from the start of the dam, which in a century will be full of sediment and indémolissable (otherwise canyon in the sediments) !!

Kidi ??? Isn't there an error in this sentence ??? Can you rephrase ???

[moinsdewatt]

China: the Three Gorges dam is officially completed

enerzine 06 July 2012



The Three Gorges dam located in the heart of China, on the Yangtze, in Hubei province is finally completed and fully connected to the network by the installation of the 32nd and last 700 MW turbine.

Started in 1994, the structure, which will have cost more than 40 billion euros and resulted in the displacement of at least 1,5 million residents, has an installed electrical power of 22,5 gigawatts, or 11% of the hydroelectric capacity of the country.

"The operation of all the generators makes the Three Gorges Dam the largest hydroelectric power project in the world, and the largest clean energy base," Zhang Cheng, general manager of the city, said at a ceremony. company operating the project, China Yangtze Power.

The Three Gorges hydroelectric plant will have cost more than 4 times the initial amount, or 254 billion yuan (32,23 billion euros) instead of 63,5 billion yuan (8,05 billion euros). In addition, an additional 123,8 billion yuan (15,71 billion euros) will have been devoted to monitoring the project.

The 185 meter high and 2.305 meter long dam includes a 600 km reservoir.

This gigantism has a price to pay. Indeed, the construction of the dam caused the displacement of millions of people without any help from the State with the swallowing up of 1.300 historical and archaeological sites, several cities and many villages.

Furthermore, the rapid sedimentation of the reservoir would paralyze the functioning of the dam. Each year, 500 million tonnes of mud are deposited in the gorges of the river, in particular, in the retention lake. With the completion of the structure, specialists estimate that the sediment pressure should be exerted on the reservoir and affect its hydroelectric potential up to 50%.

Despite all these drawbacks, the Chinese central government has planned to commission another 140 gigawatt hydroelectric plant by 2015.

http://www.enerzine.com/7/14191+chine-- ... heve+.html

The last sentence must contain a bug. I don't see a 140 GW power plant. typo? Or the sum of all planned projects?