水电是清洁能源。优先发展水电是世界各国通行的能源政策取向。目前,发达国家的水电开发量已达到可开发量的90%,而我国只有20.4%。优化能源结构、加快发展水电等一次性清洁能源是我国重要的能源开发战略。水电项目开发的特点是投资规模大、建设周期长、不确定性因素多。这些特 Hydro is clean energy. The priority of hydropower development is the prevailing energy policy orientation of all countries in the world. At present, hydropower development in developed countries has reached 90% of the exploitable amount, while in our country only 20.4%. Optimizing the energy structure and accelerating the development of one-off clean energy such as hydropower are China’s major energy development strategies. Hydropower project development is characterized by large-scale investment, long construction period, many uncertainties. These special