水利是国民经济和社会发展的基础产业。水利水电工程建设周期长、投资大、协作部门多,受自然资源、地形、地质、水文气象条件的影响很大,也受当地经济发展水平、交通及其他资源市场条件的影响,其个性非常突出。在计价方面,具有单件性、多次性、方法的多样性及依据的复杂性等特征。 Water conservancy is the basic industry of national economy and social development. Water conservancy and hydropower projects have a long construction period, large investment and many cooperation departments. They are greatly affected by natural resources, topography, geology and hydro-meteorology. They are also greatly influenced by the local economic development level, traffic and other resource market conditions, and their individualities are prominent . In the valuation, with a single, multiple, the diversity of methods and based on the complexity and other characteristics.