Wang Hao, Wang Jianhua, Qin Dayong, Jia Yangwen, Qiu Yaqin

(China Institute of Hydropower and Water Resources Research, Beijing, 100044)

Abstract: The water resources assessment based on ecosystem is one of the basic problems to realize water resources sustainable development and promote the harmonious development between economic and ecological system. This paper summarizes the developments state and tendency of water resources assessment in contents and methodology in the research of this area, and analyzed their faced challenge. Furthermore, this paper presents the concept of water resources based on ecosystem and a dynamic hierarchical methodology of water resources assessment, that is, regional precipitation is considered as the whole flux of water resources. The resources structure of precipitation is analyzed systematically according to three principles of effectiveness, controllability and recoverability in water resources assessment in order to realize the hierarchical assessment including general water resources, special water resources and available water resources for national economy. In measure, the dualistic water resources assessment model jointing distributed hydrological model with physical mechanism and lumped water resources allocation model is applied to realize dynamic hierarchical assessment of water resources with changed underlying conditions and water use conditions as model variable. 

Key words: human activities; water resources; assessment methodology; dualistic hydrological cycle; distributed hydrological model