August 30, 2009

 

Yichang City is located at the west of China”s Hubei Province, covers 21,084 km2, on the the middle and upper reaches of the Yangtze River. Due to its good geographic location, Yichang has been regared as a dispatching center, an important trading port and a transportation hub along the Yangtze river connecting west Hubei and east Sichuan from early times. It is said to be as “Gateway to the Three Gorges”, and “Throat between Sichuan and Hubei”. Today, Yichang remains a brisk river port of China, among Chongqing, Wuhan and Shanghai.

August 30, 2009

China Yangtze Three Gorges Project (TGP), as one of the biggest hydropower-complex project in the world, ranks as the key project for improvement and development of Yangtze River. The dam is located in the areas of Xilingxia gorge, one of the three gorges of the river, which will control a drainage area of 1 million k㎡ , with an average annual runoff of 451 billion m3 . The open valley at the dam site, with hard and complete granite as the bedrock, has provided the favorable topographical and geological conditions for dam construction.

The Three Gorges Dam site is 27 miles upstream from YichangCity proper, at SandoupingTown, 38km upstream from the Gezhouba Dam Lock, inside the third of the Three Gorges. It is planned to be by far the largest hydroelectric project in the world.
The Project calls for the construction of a concrete dam, a hydroelectric power plant and a series of locks just below the scenic Three Gorges region. The project is designed to be built in three phases and is scheduled for completion in year 2009.
One of the largest construction projects ever undertaken in the world, the Three Gorges Project will forever change the face of the Yangtze River as we know it today. Possessing comprehensive utilization benefits mainly for flood control, power generation and navigation improvement. It will be a vital important and backbone project in harnessing and developing of the Yangtze River.

Although the TGP Reservoir is not the reservoir with the biggest capacity in the world, its reserved flood control capacity can help cut flood peak by 27,000 ~ 33,000 m3/s, the biggest for a water conservancy project in the world.
When the TGP is completed, the flood control standard of the middle and lower reaches of the Yangtze, especially the Jingjiang Section, will be largely upgraded from the present level of preventing under-10-year floods to that of preventing 100-year floods. So 15 million people and 1.5 million hectares of farmland in the Jianghan Plain are relieved from flood threats, and devastating plagues of massive death caused by big floods are avoided.
The Three Gorges Hydropower Plant (TGHP) contains twenty-six turbine-generator units, each with installed capacity of 700MW, not including the six more 700MW units in the Right Bank Underground Powerhouse under construction. Its total installed capacity amounts to 18200MW, and its expected annual average power generation accounts up to 84.7 TWH, so the TGHP ranks the biggest one in the world with remarkable power generation benefit. At present, TGHP electricity is sent unceasingly to Central China, East China, Guangdong, and Chongqing with the maximum transmission range of 1000 Km.

Backwater of the TGP reservoir goes as far as to the southwest metropolis Chongqing, therefore it improves 660 km waterway, and largely enables 10000-tonnage fleets to navigate between Shanghai and Chongqing. The annual one-way navigation capacity of the Yangtze at the dam will be upgraded from ten million tons to fifty million tons.