Does the Three Gorges Reservoir have more advantages than disadvantages or more disadvantages than advantages for the development of China?

The disadvantages outweigh the advantages. The overall cost of the project, the cost of destroying the environment, the relocated people and the later reconstruction far exceed the profits it can get from power generation, especially environmental factors. This is not a problem that can be solved in decades.

The primary construction goal of the Three Gorges Project is flood control, and the flood control capacity of Jingjiang levee will be improved from once every ten years to once every hundred years.

The total installed capacity of the Three Gorges Project is18.2 million kilowatts. The annual power generation will reach 84.7 billion kWh, which will provide cheap and clean electricity for industrial towns and vast areas along the Yangtze River. This is the most important direct economic benefit of the Three Gorges Project and a sufficient condition for its construction.

The formation of the Three Gorges Reservoir has improved the navigation channel of the canyon reach. The 10,000-ton fleet can reach Chongqing directly in half a year, the navigation capacity can be increased from the current 6.5438+million tons per year to 50 million tons, and the shipping cost can be reduced by 30%~37%.

After the completion of the Three Gorges Project, as an organic link between the southwest of China and the economically developed eastern coastal areas, with its huge comprehensive benefits, it will strongly promote and promote the economic development and take-off of the Yangtze River basin. This is of great significance to speed up the modernization process of China and improve its comprehensive national strength.

Three gorges project and its market opportunities. The Three Gorges Project is of great scale. It consists of the world's largest reservoir resettlement project, the world's largest river dam, hydropower station, navigation structure and large-scale long-distance power transmission and transformation project.

The huge construction scale of the Three Gorges Project provides huge market opportunities for the construction industry, materials industry, electromechanical manufacturing industry, electric power and information industry in the Yangtze River valley of China and even the whole country, and also promotes the economic development of this region and even the whole country.

The Three Gorges Project needs the latest technology in today's world, and will also provide a market that cannot be ignored in the fields of international engineering, machinery, electricity and electronic information.

About reservoir resettlement. Reservoir migrants have moved about 1 10,000 people and need to rebuild their homes. The flooded areas of reservoirs are poverty-stricken areas along the Yangtze River, and the investment of a large amount of immigrant funds is a new development opportunity for this area. The immigration policy of "development immigration" will promote the economic prosperity of the reservoir area. It is reasonable from any angle of politics, society and economy to exchange 1 10,000 population in the reservoir area for the security of the downstream, especially Jingjiang area10.5 million population and 23 million mu of cultivated land. This is why the construction of the Three Gorges Project has won the support and support of the people in the reservoir area.

5 Reservoir-induced earthquake and reservoir bank stability

The basic conclusion of the induced earthquake research and evaluation of the Three Gorges Reservoir is that the total length from the dam site to the Hemiao River is 16 km, and the rock mass integrity is good, with little historical and present seismic activity. Shallow earthquakes is not excluded after impoundment, and the estimated maximum magnitude is not greater than 4; The earthquake induced by karst reservoir may occur in the carbonate canyon section from He Miao to Baidicheng 142 km long, and the maximum magnitude is less than 4. The reservoir section above Baidicheng is mainly composed of sandstone and mudstone, with no major faults and weak water permeability, which does not have the conditions for reservoir-induced earthquakes.

According to the results of long-term geological investigation and reservoir-induced earthquakes, the crust of the Three Gorges dam area and the reservoir area is stable, and there is no geological background for serious earthquakes. After the impoundment of the Three Gorges Reservoir, although the possibility of reservoir-induced earthquake is not ruled out, the highest seismic intensity affecting the dam area will not exceed VI degree, and the safety of main buildings fortified according to Vll degree will not be affected.

The reservoir bank of Three Gorges Reservoir is mainly composed of hard rock and semi-hard rock, with few main faults, weak neotectonic movement and seismic activity, and good overall stability of the reservoir bank. However, some collapses and landslides occurred on the bank slopes of the Three Gorges reach during the downcut of the Yangtze River bed, which is a normal natural phenomenon in the development of the river. It has happened in history, and it may continue to happen after the reservoir is filled. There are 284 large-scale landslides and dangerous rocks distributed on the bank slope of the reservoir area, with a total volume of about 3 billion cubic meters. Among them, there are 64 large landslides with poor stability and possible instability after impoundment, with a total amount of 340 million cubic meters. Even if it all breaks into the reservoir, it will not have a substantial impact on the storage capacity and life of the reservoir. There is no large landslide within 26 kilometers from the dam, so the possible landslide on the reservoir bank will not affect the safety of the hub building. After the impoundment of the Three Gorges Reservoir, due to the rising water level and increasing water depth, local landslides and collapses may occur on the reservoir bank, which will not affect the navigation of the waterway. After the reservoir is impounded, it may be the new old city and residents on the bank of the reservoir that are greatly affected by the local collapse of the reservoir. Therefore, we should pay full attention to the geological conditions of new towns and concentrated residential areas, and at the same time, we should establish monitoring and forecasting work for possible unstable landslides.