The construction of hydroelectric dams, especially the construction of large dams on the river, is a comprehensive engineering project. This often takes several years, even ten years. On the one hand, during the construction period, intensive engineering works will produce a large amount of technical and living waste, solid waste and sewage. On the other hand, with the completion of the dam, the huge construction team will leave, so the construction personnel will generally not spend huge amounts of money to build large-scale solid waste treatment and waste water.