1 Indeed, hydroelectric power stations are generally built on reservoirs. In fact, there is no problem of water quality deterioration. Since hydroelectric power plants use water to generate electricity, there is no problem of water quality deterioration. If we must say that the water quality has deteriorated, it is perhaps because a large quantity of sediment has become trapped on the reservoir.
2 Storage of reservoir water will create a still water environment and reduce self-purification capacity; floating waste upstream is intercepted by the dam, and even some organic waste rots and deteriorates to pollute the water source; the operation of the hydroelectric plant itself will also produce irregular pollution. During the construction process, building materials such as sand, gravel, cement, etc. are used. increasewill also remove impurities in the water. The hydroelectric power station is shown in the photo: