How to treat the advantages and disadvantages of building large hydropower stations?

According to the evaluation results of water resources in China, China ranks first in the world in terms of theoretical reserves, technical exploitable capacity and economic exploitable capacity, with unparalleled advantages. Hydropower is a renewable energy and belongs to green energy. The benefits of water conservancy projects are obvious. First of all, adjust the time allocation of water resources, store water in rainy season and release water in dry season, so that people in the reservoir area will no longer worry about water shortage. The surrounding fields can be irrigated and cultivated in reservoirs to increase farmers' income. Thirdly, compared with thermal power, hydropower is clean and pollution-free, and water is a renewable resource that can be reused. Hydropower in southern China is dominant. China's sustained high economic growth for 30 consecutive years has increased the demand for electricity, and projects such as Gezhouba and Three Gorges have provided a strong guarantee for economic development. Power transmission from west to east is one of the major projects in the new century. Without hydropower, it is impossible to fill the power gap in the east. From this point of view, it is essential to build dams and water conservancy projects to generate electricity.

The purpose of building water conservancy and hydropower projects is to transform nature and benefit mankind. Although it will have a certain impact on the environment, such as floods, water resources, river ecological problems, migration and even some disasters, as long as necessary countermeasures are taken, this adverse impact can be completely reduced to a minimum. As far as the present situation of China is concerned, it is inevitable to build water conservancy, but we must pay attention to the development of environmental problems.

Therefore, what should be adhered to now is the dam project that does more harm than good to the environment, which can improve the environment and should be actively built. The advantages and disadvantages of environmental impact are equal, but the resources and social benefits of the project are huge, which is generally conducive to the sustainable development of society. According to the principle that the environment can be changed, it should be allowed to be launched. Dam projects that have a serious impact on the environment and destroy the ecological environment should be resolutely opposed.