What does the impact of the Three Gorges mean? What is the impact of the Three Gorges?
1. The impact of the Three Gorges refers to the frequent occurrence of abnormal climate in China in recent years, such as severe drought in southwest China, severe heat in Chongqing, heavy rains in the two lake basins, etc. The Three Gorges has often been targeted. On the Internet, netizens put forward the "Three Gorges induced drought theory", claiming that the Three Gorges Project was the culprit of the rare severe drought in the middle and lower reaches of the Yangtze River in 2011.
2. The Three Gorges Reservoir has a huge storage capacity, which will inevitably increase the frequency of earthquakes in the reservoir area. Since the lower parts of the mountains on both sides of the Three Gorges will be immersed for a long time in the future, the frequency of landslides, collapses and debris flows will increase. Increase, this will be the main geological disaster caused by the Three Gorges Project. However, project supporters only considered the static conditions of the geology and did not consider the possible qualitative changes in geological conditions after water impoundment.
3. Geological disasters: Experts say that after the Three Gorges Reservoir was built, it gradually flooded a large number of low-lying mountains, including cities, towns and villages. Long-term immersion caused the flooded mountains to become soft and washed in. Low-lying mining goafs can lead to bank collapse, landslides, etc. In addition, the Three Gorges Reservoir stores water every winter and releases water every summer (flood season). The periodic rise and fall of the reservoir water level also puts pressure on the areas along the reservoir and can induce various geological disasters.
4. Lightning strikes: From April to August 2007, lightning strikes occurred many times in the reservoir area and its adjacent areas, especially in Chongqing, resulting in 21 deaths. The disaster losses were heavier than in previous years. Among them, a lightning strike in Dianjiang and Qijiang, Chongqing on April 1 killed 5 people; a lightning strike at Xingye Village Primary School in Yihe Town, Kaixian County, Chongqing on May 23 killed 7 primary school students, 19 were seriously injured, and 25 were slightly injured. Strong winds and hail: In 2007, strong convective weather such as strong winds and hail occurred frequently in the reservoir area and its adjacent areas, with many spots covering a wide area and a large time span. They occurred one after another from spring to summer, causing disaster losses that were heavier than the previous year. According to statistics, more than 50 counties in Japan have been hit by strong local convective weather such as strong winds and hail, resulting in 3 deaths, more than 2.3 million people affected, more than 83,000 houses damaged, and economic losses of more than 380 million due to the disaster. Yuan.
5. Heavy fog: In the winter and late autumn of 2006/2007, heavy fog weather frequently occurred in most parts of the western part of the reservoir area, which affected highways, railways, civil aviation, river transportation and other transportation to varying degrees. Traveling during the Spring Festival caused inconvenience to people and caused major traffic accidents, which led to a decrease in air quality and affected human health. On February 7, a major traffic accident occurred in Hefeng County, Enshi Prefecture, Hubei Province due to rain and heavy fog, in which 16 people died and 16 others were injured. On November 9, heavy fog blocked Chongqing Airport. In just one hour, 30 inbound and outbound flights were delayed, 4 flights were forced to be canceled, and 4,000 passengers were stranded at the airport; 8 expressways including Chengdu-Chongqing Expressway and Yu-Yi Expressway were implemented successively Traffic control; Water transport Chaotianmen San Ferry route is closed for 4 hours.
6. Drought: In 2007, the drought in the reservoir area was generally mild. In the winter of 2006/2007, due to the follow-up effects of the severe high-temperature drought in Sichuan and Chongqing last summer, Chongqing's reservoir water storage and rice field water storage were significantly less, river water levels generally hovered in low water level areas, and groundwater dropped sharply. Chongqing's city-wide water conservancy projects The amount of water stored is less than 50% of what should be stored in the same period in history. 1.5 million people and 980,000 large livestock in the city have temporary drinking water difficulties. 116,000 hectares of crops have been affected by drought. In some areas of the reservoir area, there are difficulties in industrial, agricultural production and domestic water use. . Recently, the middle and lower reaches of the Yangtze River have suffered from a rare drought in 50 years, which has once again focused people's attention on the Three Gorges Project. On May 18, the State Council executive meeting discussed and approved the "Three Gorges Follow-up Work Plan" that was started in 2009.