Why build the Three Gorges Dam?

What benefits did the construction of the Three Gorges Dam bring?

First, the Three Gorges Project can effectively prevent and control floods. China is a typical southeast monsoon climate with uneven rainfall distribution. The Yangtze River is also an aboveground river from Yibin to Wuhan. In the past two thousand years, there has been a flood in less than ten years, and the flood of 1998 is still fresh in everyone's memory. After the completion of the Three Gorges Project, the huge adjustment of reservoir capacity can effectively improve the downstream flood control standards and effectively delay river siltation. The Yangtze River is located in the ancient flood disaster area, with a frequency of about 10 years, and the flood is powerful. After the completion of the Three Gorges Dam, the once-in-a-century flood can be controlled to ensure the safety of the middle and lower reaches. In case of a once-in-a-thousand-year flood, the danger of dam break can be avoided through flood diversion and cooperation of flood diversion. History will prove that the Three Gorges Project of the Yangtze River is the patron saint of directly ensuring the safety of nearly 23 million mu of cultivated land,150,000 people's lives and property and the safety of the main arteries of Beijing-Guangzhou and Beijing-Kowloon railways in the flood control system in the middle and lower reaches. The history of China is the history of river management. If the flood is not cured, the country will not be stable. In other words, without the Three Gorges Project, the Three Gorges Project can still be replaced in other aspects, except flood control.

Second, the Three Gorges Project can generate electricity, with an installed capacity of 65.438+08.2 million kilowatts and an annual power generation of 84.7 billion kWh, ranking first in the world. After the completion of the Three Gorges Dam, the surging river will do work and generate electricity for the Three Gorges Hydropower Station, reversely adjust the navigation steps between the Three Gorges and Gezhouba, and then do work and generate electricity for the Gezhouba Hydropower Station, so that the total annual power generation of the Three Gorges and Gezhouba will reach/kloc-0.05 billion kWh. If the electricity price per kWh is 0. 1 yuan, the annual innovation value is 105 billion yuan. Located in the hinterland of China, the Three Gorges Hydropower Station is about 1000 km away from the main load center in China, and will be the main power grid interconnection center in the future. After the power grid is connected to the grid, it can not only complement the national fire, water and nuclear power, but also greatly improve the quality and efficiency of power grid operation. Therefore, the Three Gorges Hydropower Station will be the future power dispatching center of China.

Third, the construction of the Three Gorges Dam has brought convenience to shipping in the upper reaches of the Yangtze River. The construction of the Three Gorges Project is a golden opportunity for the reservoir area with inconvenient transportation and relatively backward economic development. The 660-kilometer-long Yiyu River is very poor. There are more than 100 beach risks, dozens of single navigation sections and dozens of heavy cargo towing sections. The annual one-way shipping capacity is insufficient100000 tons. After the completion of the Three Gorges Dam, all beach hazards, single navigation sections and towing sections will be submerged, and the navigation channels will be widened a lot. When the 10,000-ton fleet reaches the sea through inland rivers, the shipping cost will be greatly reduced, and the annual one-way shipping capacity will exceed 50 million tons. Then, the formation of the golden waterway across China, the east and the west is very beneficial to the economic development and prosperity from both sides of the Yangtze River to the coastal areas.

Fourthly, the construction of the Three Gorges Dam has greatly improved China's comprehensive national strength. The Three Gorges Dam is known as "the first dam in the world", and its completion marks that China's water conservancy construction has entered the world's leading level, which has enhanced national pride and pride.

Why build the Three Gorges Dam?

I feel the same way. The Three Gorges in Badong is a wealth left by history and should be preserved and protected, but it is really stupid to destroy it. When they knew that natural revenge was coming, it was too late. How did the Three Gorges Basin change from ancient times to today for thousands of years?

Who agreed to build the Three Gorges Dam in China, and why did China build it?

The Three Gorges Dam is located in Yichang City, Hubei Province, China, 38 kilometers away from the downstream Gezhouba Water Control Project; It is the main project of the Three Gorges Hydropower Station, the core landscape of the Three Gorges Dam tourist area, and the eastern end of the Three Gorges Reservoir, the largest hydropower project in the world today.

The Three Gorges Dam Project consists of the main building and diversion works, with a total length of about 2,309 m and a dam height of 185m, with a total investment of 495.46 billion yuan. On February 65, 438+0994, 65, 438+04, construction was officially started, and the whole line was connected on May 20, 2006.

With the approval of the National Defense General, the Three Gorges Reservoir was officially started at 0: 00 on September 201year 175m for the fourth experimental water storage. By 9: 00 on June 8/kloc-0, the water level of the reservoir reached160.18m .. 20. The upstream inflow surged to 46,000 cubic meters per second. 20 12 On July 24th, the inflow of the Three Gorges Dam reached 7120,000 cubic meters per second, the largest flood peak since the Three Gorges Reservoir was built.

Advantages of the dam: flood control; Power generation; Northern water storage; Promote shipping. Disadvantages: the downstream migratory fish and the fish endemic to the Yangtze River are affected to some extent; Sudden geological disasters have increased; Microseism increased significantly.

At the same time, the completion of the Three Gorges Dam will transfer more than 3.9 billion cubic meters of water to an altitude of 175 meters. According to NASA's calculation, this artificially slows down the rotation of the earth, saying that every day is 0.000006 seconds longer than in the past.

Construction significance:

The Three Gorges Project is by far the most comprehensive water conservancy control project in the world, which plays a great role in flood control and shipping benefits. After the completion of the Three Gorges Dam, a 600-kilometer-long reservoir will be formed, which will store water in stages and become a rare new landscape in the world.

After the project is completed, the normal water level of the reservoir is1.75m, the flood control capacity is 2.21.50 billion cubic meters, and the total storage capacity is 39.3 billion cubic meters, which can give full play to its key role in the flood control system in the middle and lower reaches of the Yangtze River and will significantly improve the 660km waterway from Yichang to Chongqing. The 10,000-ton fleet can reach Chongqing Port directly and will play a role in flood control, power generation, shipping, aquaculture, tourism and ecological protection.

flood control benefits

When the Three Gorges Reservoir is in operation, the reserved flood control capacity is 2.2/kloc-0.50 billion cubic meters, and the flood regulation of the reservoir can reduce the peak flow by 27,000-33,000 cubic meters per second, which is the highest in the world.

Shipping interests

The backwater from the Three Gorges Reservoir to Chongqing, an important town in the southwest, will increase the shipping mileage by 660 kilometers, and the annual one-way navigation capacity will be increased from 6,543,800 tons to 50 million tons. It is well-deserved to call the Three Gorges Project the first hub project in the world to improve shipping conditions.

Drought resistance function

During the severe drought in the downstream, the Three Gorges can increase the discharge capacity and discharge capacity, and effectively alleviate the drought. Zheng Shouren, chief designer of the Three Gorges Project, chief engineer of the Yangtze River Water Conservancy Commission and academician of the China Academy of Engineering, said that drought resistance is a new function of the Three Gorges Project. He said that the Three Gorges Project is designed for flood control, power generation, shipping and water supply. The function of water supplement is to take into account the residents and production water on both sides of the downstream. Now it seems that it is still necessary to meet the demand for drought-resistant water. This part of the water demand is relatively large.

Today, the construction period of the Three Gorges Project 17 has been fully completed, and the Three Gorges Dam, which has attracted worldwide attention, has shown its majestic posture. It is particularly gratifying that the builders of the Three Gorges not only created many world records in the history of hydropower construction, but also ensured the quality, and all the completed unit projects passed the quality evaluation.

Who agreed to build the Three Gorges Dam in China?

19 18, Dr. Sun Yat-sen put forward the initial idea of establishing the Three Gorges Project in the article "The General Plan for the Founding of the People's Republic of China": "With the sluice weir, the boat can go upstream, and its water power can be used."

After the founding of New China, the Yangtze River Water Conservancy Commission was established in February 1950, and comprehensive management of the Yangtze River began.

1955, the Yangtze river basin planning and the survey, scientific research and planning of the Three Gorges Project started in an all-round way, and were basically completed by the end of 1957.

19701970 On February 26th, the construction of Gezhouba on the Yangtze River was approved, which was a planned and step-by-step preparation for the construction of the Three Gorges Project.

1On April 3, 1992, the Fifth Session of the Seventh National People's Congress passed the Resolution on the Construction of the Three Gorges Project, which completed the legislative procedure of the Three Gorges Project and entered the implementation stage.

On September 27th, 1993, China Three Gorges Project Development Corporation was formally established in Yichang. ......

Why build the Three Gorges Dam? What is the function of the Three Gorges Dam?

After the completion of the Three Gorges Dam, it has made great contributions to flood control and power generation in the Yangtze River basin. It not only improves the flood control standard of Jingjiang reach from "once every ten years" to "once every hundred years", but also basically alleviates the threat of upstream floods to Wuhan, Dongting Lake area and Jianghan Plain. Moreover, the annual power generation of the Three Gorges Power Station is about 654.38 billion kWh, which is equivalent to saving 50 million tons of coal every year, greatly reducing air pollution and carbon dioxide emissions.

Why should the Three Gorges Dam be built in the Three Gorges?

The primary purpose of building the Three Gorges Dam is to reduce the flood disaster in the middle and lower reaches of the Yangtze River. Secondly, it can also be used for power generation, shipping, tourism and other purposes. Therefore, it is necessary to consider whether there is a large storage capacity when selecting the site. When the storage capacity is large enough, more upstream inflow water can be accumulated during flood, thus reducing the flood volume in the middle and lower reaches. Secondly, it is necessary to consider the large gap in dam construction area in order to play the role of power generation.

1, the Three Gorges is located at the boundary of the upper and middle reaches of the Yangtze River, which can completely achieve the purpose of regulating and storing runoff in the middle and lower reaches. And improve the shipping conditions in the upper reaches.

2. The Three Gorges is located at the intersection of the second step and the third step in China, with great terrain difference, rich water energy and large power generation.

3. The water storage capacity above the Three Gorges is large.

4. The valley in the canyon area is narrow and the amount of dam construction is small.

Mainly the above points, of course, there are also some socio-economic factors, such as the construction of farmland and villages flooded by reservoirs, or the population that needs to be relocated.

Why build the Three Gorges Dam?

In order to generate electricity and show national strength,

Why build the Three Gorges? Is it good or bad to build the Three Gorges?

The Three Gorges Dam has been completed. Please talk about your understanding and views on the Three Gorges Project. Ren Jianhua: I think there are advantages and disadvantages, but the advantages outweigh the disadvantages. First of all, the disadvantages are: the change of ecosystem, from rivers to lakes, some creatures may become extinct. For example, fish that lay eggs in the upstream will affect local precipitation. It is conducive to increasing power generation, saving coal, purifying air, preventing floods and navigation, and promoting rapid economic growth. After answering Zhang Jilan, that is actually a very deep topic. The understanding of the Three Gorges Project is to talk about her good and bad. The beauty of the Three Gorges lies in its flood control, irrigation and aquaculture. Can support the life and industrial electricity consumption of many people in China; Let the temperature in Chongqing drop 1.2 degrees Celsius in summer and rise 1 degrees Celsius in winter; Conducive to the economic development of Chongqing and the middle and lower reaches of the Yangtze River; Its bad aspects are: flooding the cultural relics around the reservoir area; It destroyed the coastal ecology and affected the survival of most animals and plants around it. I think the advantages of the Three Gorges Project outweigh the disadvantages at this stage. And one of her protection projects should also be worthy of our attention. The Three Gorges Project was discussed many years ago. She is a combination of history and reality. Her appearance has changed many things, conformed to the development of society and lost many things, which requires us to do some remedial work. Then green camp is a good window and environment. You can look at the rivers around us and you will know. In fact, the construction of the dam has accumulated a lot of sediment around the dam, and the turbidity of water and the decrease of sediment in the middle and lower reaches have had a negative impact on the environment. Xiong Jing Three Gorges Project is a big project, and its completion can prevent floods in the middle and lower reaches of the Yangtze River. It can generate electricity and is the largest hydropower station in the world at present. The Three Gorges is rich in water resources, which can bring great social and economic benefits. It can also promote shipping, and the Three Gorges Reservoir can improve the restriction of the Chuanjiang waterway on the Yangtze waterway. However, the construction of the Three Gorges Dam also poses a certain threat to the environment, which will cause a series of problems such as water level fluctuation zone and also bring challenges to the living environment of the surrounding residents. But as long as environmental experts study these problems in time and try their best to solve them, the Three Gorges Dam will certainly benefit mankind. Answer over! With the rapid economic development in China, especially the surge in power demand, the Three Gorges Project is a good solution, which can effectively solve the energy crisis in southern China and stabilize electricity prices. The environmental problems brought by it, such as the problem of water-level fluctuation zone, were not well evaluated at the initial stage, which is inevitable for every dam. However, it is still too late. We should stand at the height of history and be responsible to the people. Solving problems that have a great impact on people's lives, if we only pay attention to economic benefits, will have an impact on the effective utilization of the Three Gorges, and China's international status will also be affected. If we don't solve these problems now, when things get worse and out of control, we will have to wake up and the cost will be even greater. Chen Guangwei's completion of the Three Gorges Dam will definitely do more good than harm. It can prevent floods, generate electricity and increase the transport capacity of ships. It can be talked about by future generations like Gezhouba. However, the completion of the dam must have its drawbacks. For example, the water level fluctuation area that green camp will visit this time is a potential and threatening ecological pollution. I checked almost all the information about the water level fluctuation zone. I think the most ideal solution now is a specific plant, but it has not been successfully developed. I think we can think of a better way and draw a better conclusion during the trip, which will be decided after the specific field trip. The topic of Three Gorges is so big that I can only choose one side to answer it. The answer is significant. The construction process of Hegang Three Gorges Dam has been full of controversy. Some of them are sensational. What does it matter? No investigation, no right to speak. This is the main reason why I want to take part in this green camp. The Three Gorges Dam has been completed. What we need to do now is how to reduce hidden dangers. Man is insignificant in front of nature, although there have been many arguments before the construction of the Three Gorges. But now human beings know very little about nature. This is an unprecedented project, just like doing a big ecological experiment. Once the experiment fails, the consequences will be very serious! I won't talk about the great role of the Three Gorges Project in economic construction and flood control. I will mainly talk about hidden dangers: 1. Pollution problems include dozens of large, medium and small industrial cities along the reservoir area, including Chongqing, discharging pollutants to the Three Gorges day and night, and factories, mines, hospitals, graves, toilets and garbage dumps below 135 meters along the river. .........

After the establishment of the Three Gorges Dam, which scenery of the Three Gorges no longer exists, and why?

The establishment of the Three Gorges Dam caused the water level in the upper reaches to rise, and some low-lying scenic spots were submerged.

The Three Gorges Project is the largest water conservancy control project in the world today, and it has been officially started since 1994. The Three Gorges Reservoir has a total storage capacity of 39.3 billion cubic meters and a flood control storage capacity of 2210.50 billion cubic meters. Reservoir flood regulation can reduce the peak flow by 27,000-33,000 cubic meters per second, effectively control the flood in the upper reaches of the Yangtze River and protect the population in Jingjiang area in the middle and lower reaches of the Yangtze River, with a population of/kloc-0.5 million. The total installed capacity of the Three Gorges Hydropower Station is 65.438+08.2 million kilowatts, and the average annual power generation is over 84.7 billion kWh.

In 2009, most of the Three Gorges cultural relics in the reservoir area were flooded and needed urgent rescue.

Water level signs of "135" and "175" can be seen everywhere on the mountains on both sides of the Yangtze River, which makes people feel the sense of urgency. Time is pressing-this is the knowledge of experts involved in the rescue and protection of cultural relics in the Three Gorges. They used the word "saving cultural relics" to express their urgent feelings. They say that it takes them years to finish what others have done for decades or even hundreds of years. According to the overall progress requirements of the Three Gorges Project, the water depth in the reservoir area will reach135m in 2003,155m in 2006 and175m in 2009. By 2003, more than half of the Three Gorges reservoir area will be flooded, and most of it will be flooded in 2009. The rescue and protection of cultural relics is imminent. if

The Three Gorges Project is the largest water conservancy construction project in the world, and the cultural relics protection work in cooperation with the Three Gorges Project is a huge cultural relics protection system project since the founding of the People's Republic of China. The quality of this project will directly affect the image of the Three Gorges Project, and it is an important symbol to measure whether the Three Gorges Project is a civilized project. Three Gorges reservoir area 1074 cultural relics and historic sites are included in the protection plan, including 752 in Chongqing reservoir area and 322 in Hubei reservoir area. The protection of cultural relics in the reservoir area has now entered the intensive rescue and restoration stage, and many cultural relics protection schemes have been carefully designed and demonstrated by the expert group. The background of the news story

Baiheliang is a natural Liang Shi, located in the middle of the river in the north of Fuling, about 1km away from the confluence of Wujiang River and Yangtze River, and it only appears once every three to five years in dry season. The beam is about 1.600 m long and about 1.5 m wide, extending from east to west and parallel to the Yangtze River. The elevation of Baiheliang Ridge is 140m, which is about 30m lower than the highest flood level of the Yangtze River. Whenever it "appears", some passing literati leave their original works on it. 1000 years, * * * left more than 160 paragraphs and more than 30,000 words of inscriptions.

In addition, there are about 20 stone fish carvings, which are symbols used by predecessors to record the water level of the driest rivers, and record the data of the low water level of the Yangtze River in 72 dry years from the first year of Tang Guangde to the beginning of this century. Moreover, the ancients have long discovered that the second year of Bai Heliang's "appearance" is a bumper harvest year. It is the earliest, longest-lasting and largest number of low-water hydrological inscriptions found in China and even in the world, far exceeding the similar hydrological stone carvings of the Nile River in Egypt, and is called "underwater forest of steles" and "the first ancient hydrological station in the world". Shi Baozhai in Zhongxian County is another important cultural relic landscape, which was built in the Wanli period of the Ming Dynasty and is a masterpiece of the high-rise bucket structure in southern China. Its protection scheme has been preliminarily determined as "slope protection against the wall scheme", that is, cement is used to build slope protection to protect the mountain on which Shi Baozhai depends, and a fence with a height of 1 m is built on the slope protection to prevent river erosion.

Zhang Fei Temple in Yunyang is the most admired building and a striking cultural relic protection unit. Known as the "Bashu Scene" of the Yangtze River, its new relocation has been determined as Panshi Town on the other side of Yunyang New County.

Fengjie county Baidicheng is a group of temple buildings with a history dating back to the end of the Western Han Dynasty. The historical value of Baidicheng lies in that its historical evolution is actually a microcosm of the development and evolution of fengjie county from the late Han Dynasty to the Republic of China, and it is also an important material evidence for studying historical figures such as Liu Bei. However, after the completion of the Three Gorges Project, the highest water level of the reservoir will reach1.75m in winter, and then Baidicheng will become an island surrounded by water, and the overall environment of Baidicheng will undergo great changes.

How much do you know about the underwater landscape of the Three Gorges?

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Looking around, the Yangtze River is one of the mother rivers that raise the Chinese nation. It's 6300 kilometers long, and it's China. ......

Why should the Three Gorges Dam be built so high?

Physical knowledge: kinetic energy theorem: When the Three Gorges Dam is high, the potential energy will be large, and the converted kinetic energy will be large, thus promoting turbine power generation. Energy conversion is much more.

What is the purpose of building the Three Gorges Dam? What are the bad consequences?

It is common sense that the advantages far outweigh the disadvantages.

profit

1, flood control, thousands of people died and hundreds of billions were affected in 1998 alone, but on 20 10, have you heard of any major disasters? In fact, the flood peak in 20 10 was bigger than that in 1998. The former is 70,000-80,000 cubic meters per second, and the latter is 60,000 cubic meters. The most important thing is that human life is priceless.

2, generate electricity, light up the whole Shanghai, and the price is cheaper than thermal power, otherwise the night view of Huangpu River will be burned separately.

3. By sea, 10,000-ton ships can go to Chongqing.

4. Drought resistance is not that the Three Gorges stores some water in the dry season, and there is not a drop of water in the dry season.

shortcomings

1, landslides often occur in the reservoir area, but there are no casualties.

2. Silt silts up the upstream riverbed.

3. Some natural ecological impacts