Research On Sustainable Utilization Of Urban Water Resources

As the most fundametal resource and the crucial factor of affecting eco-environment, water is the core resource and necessary condition of human development and culture evolvement in our history. The development of urbanization aroused a series of water and eco-environmental problems. In our China, water has been restricting urban economy and society progress. Water scarcity, serious pollution and undeveloped water resource management are the main reasons, and increasing water utilization efficiency, optimal urban water deployment method and high improved water resource management might be the effective means. In this dissertation, the advancements of current research was summarized, and based on the relative theory of sustainable development, economics and rough set theory and etc, the relationship of urban development and water resource, water demand management, urban water deployment model, comprehensive assessment method of urban water utilization and water resource management theory were studied which provide the decision base and theory support for the urban water management and policy making.(1) The basic relationship of city and water resource is described from the aspects of effection from both sides, i.e., urban development and water use. Based on the analysis of the reason caused water problems during the process of urban development, urban economic development was as an observed point, the maximum model of urban economy and minimum model of water consumption were created, the dual relationship between them, the existence and format of optimal solutions, and necessary condition was proved and solved by duality theory. Finally, the suggestions for China water use were presented.(2) Water demand management as the effective method of solving current water crisis was expatiated by the following facets, the analysis of current research result of water demand management, the summary of the status quo of water demand management execution in China, the concept, classification method and the main research content of generalized water deamand management. The execution mechanism and policy advices of China water demand management was provided.(3) Water deployment theory was depicted by the concept, purpose and principles. This dissertation advanced a method of water deployment based on the philosophy of the maximum benefit of water ecology-economic from the aspects of concept, contonation and model. The objective function, subjective conditions and evalution method are thus amplified.(4) Through the analysis of current research, the comprehensive evaluation indicator system of urban wate utilization and water environment was created based on the sustainable development theory and water value theory. By taking advantage of rough set theory merits, that is, no transcendental experience, estimation only by objective data and decreased expert dependence, two comprehensive evaluation algorithms, Rough Set Approach for the Evaluation of urban Water resources utilizaiton (RSAEW) and Dynamic Reduct Approach for the Evaluation of urban Water resources utilizaiton (DRAEW) are designed and exemplified by Beijing data. The meanings of results and the comparision of two algorithms are described.(5) Summarized the integrated water resource management and water soft path theory. Based on the understanding of inconsistency problem of optimal plans in economics, the inconsistency problem of urban water resources management was pointed out. Thus, water management consistency theory was fully bewritten from aspects of principles, execution steps and meanings by taking use of Beijing data.