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Three Gorges Dam (Costs 37 Billion Dollar)

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It’s China’s biggest construction project since the Great Wall, – It is the virtual definition of a monumental project — a dam one and a half miles wide and more than 600 feet high that will create a reservoir hundreds of feet deep and nearly 400 miles long. The reservoir, its engineers say, will enable 10,000-ton ocean-going freighters to sail directly into the nation’s interior for six months of each year, opening a region burgeoning with agricultural and manufactured products. And the dam’s hydropower turbines are expected to create as much electricity as 18 nuclear power plants.

Chinese authorities hope the dam will take care of several major national problems with a single monumental stroke. The Three Gorges project is seen as an important future source of energy for China’s growing electrical consumption. It is also expected to tame the fabled Yangzi River. The Yangzi’s notorious floods have been recorded for millennia and have claimed more than 1 million lives in the past 100 years.

The project includes a system of locks, the largest ever built, intended to bring ocean-going ships 1,500 miles inland to Chongqing, the capital of the municipality created from Sichuan Province in 1997 to encompass the project. The municipality, with more than 30 million people, is under the direct control of the central government in Beijing. Officials hope the combination of inexpensive electricity and cheap river transportation will further open the region to international investment — making Chongqing a major business center.

The Advantages of Three Gorges Dam

1) Benefit to Flood Control

At the run-time of Three Gorges Reservoir obligate 22.15 billion cubic meters flood control capacity. The Reservoir can reduce the peak discharge about 27000 -33000 cubic meters per second. That’s the highest number in the world’s hydraulic work.

2) Output of Plant is Great

Three Gorges Hydropower Station installed 32 hydro generating units (including the 6 in the underground powerhouse) whose single-machine capacity is 0.7 million kilowatt-hour and 2 hydro generating units whose capacity is 50 thousand kilowatt-hour. The installed gross capacity is 22.5 million kilowatt-hours and annual power generation reach 0.1 trillion degrees. That’s the biggest Hydropower station in output of plant.

3) Navigation Benefit is Obvious

Three Gorges Dam make the water back to Chongqing, and that’s improved the transport condition for 660 kilometers. The fleet tonnage in the sailing course between Chongqing and Yichang can increase to ten thousand tons. Three Gorges Dam worthy the name of The Top Key Project.

4) Drought Relief Function is great

If there is a drought in the downstream area, Three Gorges Dam can increase the water drainage amount to relief the drought.

The Disadvantages of Three Gorges Dam

The dam block silt flow into down stream, made the estuary where Yangtze River flow into the sea became smaller and the salt water in the sea flow back to the land. The untreated waste water and fertilizer remainder pour into the reservoir lead to the growth of giant Algae and threaten the water supply in downstream. Pounding in dam and the adjustment in rainy season raised the landslide and damaged the geologic structure in some areas.

Three Gorges Dam as the greatest hydropower project in the world bring us so many benefits in many aspects. We should treat it from different view. We can see the advantages of Three Gorges Dam over the disadvantages.



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