After the completion of the Three Gorges Dam, what impact will it have on the climate?

There is a cooling effect in summer and a warming effect in winter, but the impact is not significant.

According to the National Climate Center's "2016 Climate Conditions Monitoring Report in the Three Gorges Region of the Yangtze River", the impact on local temperatures in the reservoir area is determined. There is a cooling effect in summer and a warming effect in winter, but the range of influence does not exceed 20 kilometers. The temperature in the Three Gorges Reservoir area showed an upward trend before and after the water was impounded, but if viewed on a large scale over time, this trend is consistent with the global warming trend.

In addition, the Three Gorges Reservoir area is a narrow water body with an altitude of 175 meters, a length of 663 kilometers, and an average width of 1.1 kilometers. The water area is a maximum of 1084 square kilometers. A water body of this size in a mountain canyon is It is difficult to affect the climate circulation conditions in southwest my country and the middle and lower reaches of the Yangtze River.

Because to change the weather and climate, the average state of atmospheric circulation needs to change over a large range and for a long time, with a horizontal scale of more than several thousand kilometers and a vertical scale of several kilometers to tens of kilometers. .

Besides, there are westerly circulations that circle the earth. As for the globalized weather system, we cannot change the cold weather caused by the cold wave just because of the Three Gorges Reservoir. In the same way, we cannot expect the summer monsoon to bring Both sides of the Three Gorges have brought too much incremental rainfall. In the face of nature, our small reservoir can bring a little more precipitation and increase the temperature by 0.1°C in winter. It is enough.

Extended information:

The benefits of building the Three Gorges Dam are:

1. Solving the problem of power shortage in China

The Three Gorges Dam After completion, it will be able to provide 100 billion kilowatt-hours of power generation every year, providing impetus for China's rapid economic growth and providing lighting for countless families. Otherwise, there will be power outages for three days and two days as in the past.

2. It has super flood control capabilities

After the Three Gorges Dam is completed, it can effectively adjust the storage water level. When water is needed in downstream areas, the water flow can be increased. When there is a flood risk downstream, the water flow downstream of the reservoir area can be controlled.

3. Promote local economic development

After the completion of the Three Gorges Dam, the Three Gorges Dam became a 5A-level scenic spot; a large number of tourists come to the Three Gorges Dam for sightseeing every year, creating many benefits for the local area. employment opportunities and increased economic benefits.

People's Daily Online-Three Gorges Reservoir Area has limited impact on surrounding climate