Benefit of the Project of The Three Gorges Project
3 min readFirst Target of Three Gorges Project is Flood Control.
The project can effectively adjust the upstream flood of Yangtze River，which will assure a flood control standard of the Jingjiang section，a downstream reach to Three Gorges of Yangtze River，arise from currently preventing 10-year flood to controlling 100-year flood.Even in case of a rare occurrence of 1000-year flood，mass damages or injuries can still be prevented.At the same time，social problems such as environmental deterioration and epidemics related to the flood or flood diversion can also be avoided.Thus the project will protect 1.5 million hectare of farmland and towns，and 15 million of people from flood damage at Jianghan Plain andDongting Lake area.And also the project will raise the reliability of flood control in the mid and lower reach of Yangtze River，relieve the sand silt of Dongting Lake and create favorable conditions for dredge of the lake，and prevention and cure of the schistosomiasis epidemics in the lake area.
Three Gorges Power Plant will Provide Clean Energy.
Compared to the coal-fired power stations with equivalent electricit generation，Three Gorges Power Plant will decrease emission of 100 million tons of CO2，2 million tons of SO2，0.37 million tons of nitrogen oxide and a lot of wast water and solid waste.It will bring a great benign influence in improvement of environment，especially preventing acid rain and greenhouse effect in East and Central China.
0ther Benefit of Three Gorges Project . The Three Gorges reservoir，after the project is completed，will improve the weather in this area，be favorable for agriculture，and improve water quality in the mid and lower reach，which will relieve the invasion of saline tide in the river’s mouth.
Achievement
Since the TGP was launched a decade ago，a few world records in hydropower construction were created，and a series of technology breakthrough were achieved，thanks to the continuous practice in science&technology renovation.They are outlined as follows：
River Close-off and Cofferdam in Deep Water
TGP river close-off was conducted on the main channel and the diversion channel，the difficulty is hardly seen in other water conservancy projects.The successfulriver close-offs on 11 November 1997 and 6 November 2002 mark that China’s river close-off technology ranks among the top ones in the world.
Concrete Placement on the TGP Dam .
High Slopes outside the Three Gorges Ship lock and Metal Structures.
The double-way and five-step ship lock is characterized by the biggest water head，the most successive steps，the deepest excavation and the highest concreted side slope，and the highest and heaviest miter gate in the world.
The Design，Manufacture and Installation of the Generator Units The TGP generator units have the features of large quantity，big capacity，big water head change.Due to their extremely important role in the power grid system，CTGPC has to ensure stability and efficiency of the turbines under high water head，and meanwhile，to take into account the operation performance under low water head.
The installed capacity of one TGP unit is 700 MW，biggest in the world.Since the rated water head of TGP units is relatively low，the generators are designed to have maximum capacity of 840 M.VA.Therefore，the overall indices of TGP units set new world records.
