After the completion of the Three Gorges, what is the completion time of the Three Gorges Dam?

After the completion of the dam, the Three Gorges will have a magnificent and majestic famous landscape. The construction of permanent navigation buildings can improve the navigation conditions of the Three Gorges of the Yangtze River, and the 10,000-ton fleet that sails from Shanghai can go directly to Chongqing through the permanent locks.

The Three Gorges Project has its own unique charm in tourism. Tanziling Observation Deck is the commanding height of the Three Gorges Dam Project tourism, climb the Tanziling, overlook the far away, the landscape of the Three Gorges Dam Project can be seen at a glance, take in the panoramic view. On the construction site of the Three Gorges Dam project, the sound of rolling waves, boiling human voices and roaring machines are all in the ears, and they have converged into a hot and surging labor symphony.

After the completion of the Three Gorges Dam, an artificial lake stretching 650 kilometers from Yichang to Chongqing will be formed. The Three Gorges Dam is like a dragon soaring into the river, and like a beautiful rainbow lying on the river. Surrounded by mountains and green waters, small islands, meandering streams, and criss-crossed canyons, the beautiful natural scenery is sure to make people feel like visiting the gallery.

More than 20 Chinese and foreign journalists, including Agence France-Presse, British Television Channel 4, NBC, and Al Jazeera English Television, are currently covering the Three Gorges Reservoir area, and they have come to the Chinese Sturgeon Research Institute next to the Three Gorges Dam to witness the "new life" of the Chinese sturgeon after the completion of the Three Gorges Dam.

The Chinese sturgeon is a rare aquatic wild animal endemic to the Yangtze River, which mainly grows in the Yangtze River basin and coastal continental shelf. The Chinese sturgeon can grow up to five meters long and weigh up to 1,000 catties, but it has a gentle personality. Every year, thousands of mature Chinese sturgeons travel 3,000 miles upstream from the mouth of the Yangtze River to their hometown of Jinsha River to spawn and hatch. The hatched fry will go down the Yangtze River and return to the sea to live, and the cycle will not change.

The successive construction of the Gezhouba Dam and the Three Gorges Dam has cut off the reproductive return channel of Chinese sturgeons, and the number of migratory and breeding Chinese sturgeons has begun to decrease. In order to prevent the Chinese sturgeon from becoming extinct, China has been breeding and protecting the Chinese sturgeon in captivity since the 80s of the last century. Founded in 1982, the Chinese Sturgeon Research Institute is the first research institute in China dedicated to the protection of Chinese sturgeons.

Every year, we harvest migratory wild Chinese sturgeons from Gezhouba and transport them to the institute for breeding and artificial insemination, so as to protect and reproduce Chinese sturgeons and maintain ecological balance. Liu Denghong, director of the research center of the institute, told reporters.

At the research institute on Jiangxin Island in the Huangbai River in Yichang City, Hubei Province, three wild sturgeons caught in front of Gezhouba are recuperating. On October 25, the institute officially launched the breeding of Chinese sturgeons this autumn. On November 3, the first batch of Chinese sturgeon fry was successfully produced under the careful and meticulous cultivation of scientific researchers.

In a quiet pool, the reporter saw three wild sturgeons: a "hero mother" who had laid 50 kilograms of eggs at a time not long before was resting quietly, and the other two sturgeons were swimming leisurely. In another place, several captive-bred first-generation sturgeons have also entered the mature stage, and they will be hatched in the institute for the second generation, when the research on artificial breeding of Chinese sturgeon can enter a new stage.

According to reports, as early as 1984, the institute successfully carried out experiments on artificial breeding of juvenile Chinese sturgeons. In 1988, the institute mastered a complete set of technical systems for the fishing, storage, inducing, fertilization, debonding, incubation, temporary rearing, cultivation and release of Chinese sturgeons. At the beginning of this century, the institute's live sturgeon egg collection technology was mature and at the world's leading level.

After more than 20 years of research, the Chinese Sturgeon Research Institute has mastered a set of scientific, standardized and mature sturgeon artificial breeding techniques. At the same time, the institute has continuously released Chinese sturgeon seedlings to reintegrate them into the wild.

According to statistics from the Chinese Sturgeon Research Institute, since 1984, when the Chinese sturgeon was first bred and released, the institute has released more than 4.7 million Chinese sturgeons of various sizes into the Yangtze River and the Pearl River, so that these rare fish can still live next to people in the Yangtze River for generations.

The Three Gorges Office, which accompanied the trip, said that since the construction of the Three Gorges Project, China has invested 30 billion yuan in effective protection of the surrounding ecology and environment, and the Chinese sturgeon is one of them. (ENDS).

The Three Gorges Dam was completed on May 20, 2006.

The Three Gorges Dam project officially started construction on December 14, 1994, including the main building and diversion project, with a total length of about 3,335m and a dam height of 185m.

With the approval of the National Defense Administration, the Three Gorges Reservoir officially launched the fourth 175-meter experimental water storage at 0:00 on September 10, 2011, and the reservoir water level had reached 19:00 on the 18th.

On July 23, 2012, the Three Gorges Hub opened seven deep flood discharge holes.

Drought resistance

In the event of a severe drought in the lower reaches, the Three Gorges can intensify the discharge of water and increase the discharge flow, so that the drought-fighting situation can be effectively alleviated. Zheng Shouren, the principal designer of the Three Gorges Project, chief engineer of the Yangtze River Water Conservancy Commission, and academician of the Chinese Academy of Engineering, said that the drought-fighting function is a new function of the Three Gorges Water Conservancy Project.

He said: When the Three Gorges Project was designed, it only had the functions of flood control, power generation, shipping, and water supply. The water replenishment function is to take into account the water used by residents and production on both banks of the downstream, but also to meet the needs of drought resistance. This part of the water demand is relatively large.

Today, the 17-year construction period of the Three Gorges Project has been fully completed, and the Three Gorges Dam, which has attracted worldwide attention, has shown its majestic appearance. What is particularly gratifying is that the builders of the Three Gorges have not only set a number of world records in the history of hydropower construction, but have also controlled the quality of the completed unit projects.

The Three Gorges Project will be constructed in three phases, and this is because the Three Gorges Project must be constructed in three phases. Construction diversion is an indispensable process unique to the construction of water conservancy projects. Hydraulic projects are carried out on a river, which requires a "cut-off" of the river water, which avoids the construction site in the river and flows downstream from another channel.

There is a Zhongbao Island at the site of the Sandouping Dam of the Three Gorges Project, which divides the Yangtze River into the Great River and the Houhe River, the width of the Great River is 900 meters, and the width of the Houhe River is about 300 meters, which provides good topographic conditions for the phased diversion of the riverbed. According to the construction plan of "open channel navigation and three-phase diversion" approved by the Three Gorges Project Construction Committee, 1993-1997 is the preparatory project and the first phase of the project.

The main tasks of the preparatory project are: land acquisition and resettlement in the dam area (including external transportation and sand and gravel yard), site leveling, on-site and off-site traffic engineering (including Xiling Yangtze River Bridge and dam area wharf project, etc.), power supply, water supply, drainage, air supply, communication, storage and other systems, housing construction, sand and gravel, concrete, refrigeration systems, comprehensive processing enterprises, etc.

The main tasks of the first phase of the project are: filling the first phase of the earth and rock cofferdam, enclosing the Zhongbao Island and the right bank of the back river, forming the first phase of the foundation pit, draining the water, excavating to fresh granite, building a concrete diversion navigation nullah, and the Yangtze River water flow and passing ships still pass through the main channel of the river. After the completion of the diversion channel channel and the temporary lock on the left bank, the first phase of the earth-rock cofferdam was dismantled, and the first interception of the Three Gorges Project was carried out.

On November 8, 1997, the successful completion of the dam river interception marked the completion of the first phase of the project and the beginning of the second phase of the project.

From 1998 to 2003, the second phase of the project stage, the main tasks are: to complete the filling of the upper and lower reaches of the second phase of the earth-rock cofferdam in a dry period, to drain the water in the foundation pit of the river enclosed by the cofferdam, to excavate to fresh rock, to pour the flood discharge of the concrete gravity dam, the left bank power plant, the vertical ship lift, the left bank non-overflow dam and other dam sections, to pour the hydropower plant plant, to install the first batch of hydro generators, and to build the permanent lock on the left bank. The Yangtze River flows through the diversion nullah, and passing ships sail through the diversion nullah or temporary locks.

On November 6, 2002, the second interception of the Three Gorges Project was carried out. After the interception is successful, the RCC cofferdam is repaired to an elevation of 140 meters in the diversion nullah, and the Yangtze River water is vented from the 22 diversion bottom holes at the bottom of the flood discharge dam section, and the ship passes through the temporary lock. On June 1, 2003, the Three Gorges Reservoir began to store water, and in mid-June, the water was impounded to 135 meters, the permanent locks began to be opened, and in October, the first units began to generate electricity.

From 2004 to 2009, the third phase of the project stage, the main tasks are: to complete the concrete pouring and corresponding metal structure installation of the right bank plant dam section and the right bank non-overflow dam section, the right bank power plant plant, the installation of all 26 units of the left and right bank power stations, all power transmission and transformation projects, the completion of vertical ship lifts, the removal of RCC cofferdam and the downstream earth-rock cofferdam of the third phase, and the riverbed plugging of the diversion bottom hole of the flood discharge dam section.

May 20, 2006, with a total length of about 2308 metersThree Gorges DamThe whole line was completed and became the largest water conservancy project in the world today.

The Three Gorges Dam was elected to China's National People's Congress in 1992.

The construction was approved, and the construction officially started in 1994, and the water storage and power generation began on the afternoon of June 1, 2003, and was completed in 2009. Three Gorges Hydropower Station.

The dam elevation is 185 meters, the water storage elevation is 175 meters, the reservoir is 2,335 meters long, with a total investment of 100 million yuan, and 32 hydropower units with a single capacity of 700,000 kilowatts are installed.

The last hydropower unit of the Three Gorges Power Station was put into operation on July 4, 2012, which means that the Three Gorges Hydropower Station, with an installed capacity of 22.4 million kilowatts, has become the world's largest hydroelectric power station and clean energy on July 4, 2012.

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The role of the Three Gorges Dam:

When completed, the Three Gorges Dam will provide about 100 billion kilowatt hours per year.

Power generation effectively solves the problem of insufficient power, and at the same time, the water level can be freely adjusted, the water consumption in the downstream areas can be controlled, and the utilization of water resources can be balanced to a certain extent.

The Three Gorges Dam has huge flood control benefits and shipping benefits, providing convenience for inland and coastal connections, and at the same time, the Three Gorges Dam is a national 5A-level scenic spot after completion.

Promote the development of local tourism, thereby promoting economic development.

The purpose of building the Three Gorges Dam is: flood control, power generation, shipping, aquaculture, tourism, south-to-north water diversion, water supply and irrigation, etc. The Three Gorges Project is by far the world's largest water conservancy project with the largest comprehensive benefits, and it is bringing into play tremendous benefits in flood control and shipping.

After the completion of the Three Gorges Dam, a 600-kilometer-long reservoir was formed, which was used to store water in stages, becoming a rare new landscape in the world.

After the completion of the project, the normal water storage level of the reservoir is 175 meters, the flood control reservoir capacity is 100 million cubic meters, and the total reservoir capacity reaches 39.3 billion cubic meters, which can give full play to its key backbone role in the flood control system in the middle and lower reaches of the Yangtze River, and will significantly improve the 660-kilometer channel from Yichang to Chongqing on the Yangtze River, and the 10,000-ton fleet can go directly to Chongqing Port, which will give full play to the ten major benefits of flood control, power generation, shipping, aquaculture, tourism, south-to-north water diversion, water supply and irrigation, etc., which is incomparable to any giant power station in the world.

When the Three Gorges Reservoir is in operation, the capacity of the flood control reservoir is 100 million cubic meters, and the reservoir can reduce the peak flood flow by 27,000-33,000 cubic meters per second, which is the largest water conservancy project in the world.

The Three Gorges Reservoir will return water to Chongqing, an important city in the southwest, and it will improve the shipping mileage by 660 kilometers, and increase the annual one-way navigation capacity from 10 million tons to 50 million tons. The Three Gorges Project is the world's most significant first pivotal project to improve shipping conditions, and it deserves to be called a well-deserved project.

The Three Gorges Reservoir was built in Yichang and is the dividing line between the upper and middle reaches of the Yangtze River.

The upper reaches of the Yangtze River have a large drop, fast flow rate and large power generation energy. As the largest river in China, the Yangtze River has a large and stable water flow, which is conducive to power generation. The geological structure of the Three Gorges area is stable (not prone to natural disasters such as ** and landslides.

to the construction of the Three Gorges Dam.

This huge project has provided a favorable guarantee.

The site of the Three Gorges Dam initially included a number of candidate dam sites such as Nanjinguan, Taipingxi, and Sandouping. The final selected site of the Sandouping Dam is located at the Gezhouba Hydropower Station.

38 kilometers upstream, the terrain is open, the geological conditions are hard granite, and the intensity is small.

There is a sandbar in the middle of the river, which divides the Yangtze River into two, the left side is about 900 meters wide Dajiang and the small hill Tanziling on the bank of the river, and the right side is about 300 meters wide Houhe, which can provide convenience for phased construction.

The, the Three Gorges Dam.

After completion, it has made a great contribution to flood control and power generation in the Yangtze River basin, not only raising the flood control standard of the Jingjiang River section from "once in ten years" to "once in a hundred years", but also basically relieving the upstream flood to Wuhan City, Dongting Lake District and Jianghan Plain.

threats. And the Three Gorges Power Station is closed.

The average is about 100 billion kWh.

The annual power generation is equivalent to saving 50 million tons of coal per year, greatly reducing air pollution and carbon dioxide.

emissions. However, there have always been positive and negative opinions on the construction of the Three Gorges Dam.

Because of the problems brought about by the sediment accumulation in the reservoir area, the erosion of the river under the dam, the migration, the ecological environment, and the impact of cultural relics, historic sites and natural landscapes, etc., are also obvious. Therefore, how to scientifically summarize the gains and losses of the Three Gorges Dam will also be a major and arduous task for the scientific community.