What are the advantages and disadvantages of hydroelectric power?

Advantages of hydroelectric power generation: (1) Use the potential energy held by water at high altitude to convert kinetic energy to drive the main engine. (2) Use guide water channels and pressure water pipes to convert the potential energy of water volume into kinetic energy. (3) The favorable hydraulic location is far from the load center, the distance to electricity is long, and the power transmission cost is high. (4) The efficiency of hydroelectric production reaches more than 90%. (5) The cost per unit of output power is the lowest. (6) Power generation starts quickly and can be completed within minutes. Disadvantages: (1) Due to land restrictions, it is impossible to build a large capacity. The capacity of a single unit is around 300 MW. (2) The construction period of the factory is long and the construction costis high. (3) Because it is located in a natural river or lake area, it is susceptible to feng shui disasters and affects other water conservancy projects. Power generation is easily affected by weather conditions such as drought and rain. (4) It is not easy to increase the capacity once the factory is built.