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Three Gorges Project: A Project of the Century

Three Gorges Project: A Project of the Century. By: Xinyu Huang. Introduction. A dream of nearly one century: first proposed in 1920’s Site survey and geotechnic measure in 1940’s Feasibility study and design during 1950’s to 1990’s Construction phase: 1993-2009.

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Three Gorges Project: A Project of the Century

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  1. Three Gorges Project: A Project of the Century By: Xinyu Huang

  2. Introduction • A dream of nearly one century: first proposed in 1920’s • Site survey and geotechnic measure in 1940’s • Feasibility study and design during 1950’s to 1990’s • Construction phase: 1993-2009

  3. Yangtze River & Three Gorges

  4. Three Gorges Scenic Site Views

  5. Three Gorges Project • Capacity: 39.3 billion c. m. • Annual power generation: 84.7 billion kwhr • Length: 2,335 m • Earth work: 125 million c. m.; Concrete work: 26 million c. m.; • Residents resettle: nearly 1 million (budget: 5 billion USD) • Project volume: 6 billion USD

  6. Proposed Functions • Control the flood • Improve river transportation • Generate power • Boost economy

  7. The project construction • Three phases • 1993-1997 • 1998-2003 • 2004-2009 • Employees: 20,000~30,000

  8. The project management • Construction Manager: The Three Gorge Development Corp. • International open bid, e.g., turbine-generator contract was awarded to a Canadian-German consortium.

  9. Problems accompanying • Population resettle

  10. Problems accompanying • Submerged cities

  11. A project of great controversy • Criticism • Negative impact to ecological system • High economic cost • Potential opportunity to earthquake • Population resettlement • Safety problems • Corruption

  12. A good lesson – Aswan Dam Aswan High Dam Project

  13. Proposed benefits of Aswan Benefits • Controlling the annual floods on the Nile and prevents the damage • Providing about a half of Egypt's power supply • Improving navigation along the river by keeping the water flow consistent

  14. During construction of Aswan • About 18 years of work • Over US$1 billion • Over 90,000 Nubians were relocated • The Temple of Abu Simel was shifted

  15. Hazards brought by Aswan • Seepage and evaporation accounts for a loss of about 12-14% of the annual input into the reservoir • The sediments of the Nile have been filling the reservoir and thus decreasing its storage capacity • The Nile delta is having problems due to the lack of sediment • Poor drainage of the newly irrigated lands has led to saturation and increased salinity. • Over half of Egypt's farmland is now rated medium to poor soils.

  16. Aswan: A limited success Conclusion: As a structure Aswan project is a success, but in its effect on the ecology of the Nile Basin, most of which could have been predicted, it is a failure (Florman, 1976). It is a great mistake made by civil engineers.

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