Construction and Impact Analysis of the Three Gorges Dam

Abstract

The Yangtze River occupies an important position in China's development strategy. Due to the intensification of human activities and its natural characteristics, the Yangtze River floods frequently, so the construction of the Three Gorges Dam plays a key role in flood control. The stability of the Three Gorges Dam(TGD) and its impact on the environment of the Yangtze River Basin have attracted much attention. The paper aims to analyze the construction system of the TGD, its key technologies, and its environmental impacts on the middle and lower reaches of the Yangtze River, to provide a theoretical basis for maintaining the safety of the dam and the sustainable development of the Yangtze River Basin. The results found that the TGD is a concrete-type gravity dam, which consists of a flood relief dam, a powerhouse and navigation facilities. Its flood discharge and energy dissipation, cofferdam and navigation construction technologies are at the forefront of the world. Studies have shown that the completion of the dam has increased the magnitude of climate fluctuations, the level of pollution of water sources, and made the river channel change, but it has certain economic benefits for the society. At the same time, with the advancement of science and technology, 3S and other technologies can be used to strengthen the monitoring of the stability of the TGD. The results of this paper provide a theoretical basis for the construction status of the TGD and the sustainable development of the Yangtze River Basin.