Study And Application On The Circular Utilization Patterns Of City Water Resources

China is one of the poor watery regions in the world. The increasing population, the urbanization enhancement and the traditional linear economic development pattern caused serious crisis of water resources and pollution of water environment. The shortage of water resources and the water pollution problems have obviously restricted the development of economic of our country and city and the life level of the people. The development of a city as the humanity habitat relies on the water environment coordinated development of this region. Therefore, there are a great deal of certain theory value and practical significance to study and establish the city water resources circulation utilization Pattern on reasonable utiliazation of the city region water resources, reducing fresh water consumption and the sewage withdrawal, forming the water resources positive cycle, realizing "zero discharge" of the city region sewage and the sustainable development of water environment.In this paper, based on understanding the present research situation of the domestic and foreign related cities water cycle Pattern, the connotation of city water cycle pattern and the establishment of the prediction model of city water demand were systematically studied and the index system of city water environment with the idea circulation economy was constructed. On three aspects of individual, community and system, the city region water consuming units were analysed and integrated. Under the consideration of water saving processes, the sewage treatment, the city reclaimed water reuse, rain water comprehensive utilization, waste water circulation and water assignment network, the multi-level city water environment circulation patterns were established to reduce amount of fresh water and "zero discharge". In order to guarantee the application of city water cycle pattern, with consideration of decision-making idea, laws and regulations policy, organizational reform, technical methods, information management, etc., the whole, the integrity multi-level, dynamic, feasibe city water environmental safeguard system was also established. According with he function of the market mechanism and the supplementary interaction and...