Urban Water Resources Carrying Capacity Computing And Applied Research

Water is the source of life, the precious and indispensable resources on which mankind and all the living things rely for existence, the basic element of the ecological environment, the important conditions of normal running of the life systems and the non-life environment systems, and the important natural resources and material foundations for the national or regional economic construction and social development. Urban is high intensity activity district of humanity. With the rapid development of the urbanization process, urban population increases sharply, industrial scale is expanded, the living standard improves, and the amount of water consumption and sewerage increase. Therefore, the problems of restriction to city progress from carrying capacity of natural resources and evironment is paid more and more attention. How to coordinate the relationship among carrying capacity of natural resources and evironment and urban sustainable development? It has a bearing on not only future fortune of urban, but also whether its surroundings achieve successfully aim of sustainable development. In China, more than a half of urban development is being restricted by water resources shortage and water environment pollution, so the research about carrying capacity of urban water resources is of momentous theory significance and urgent current significance.Based on reviewing a large number of references, the research situation and prospect of water resources carrying capacity have been introduced in the paper. The water problems existing in city and their formed mechanism, urban hydrology characteristics, urban water resources system and its characteristics, and calculating model have been discussed also in the paper. The research of urban water resources carrying capacity is the key parts in the paper. The concept, characteristics, influence factors and calculating model and solving method of urban water resources are researched in detail. On the basis, the measures and ways of improving the water resources carrying capacity are summarized.To verify the models and methods presented above, they are applied to the city of Zhengzhou. On the basis of collecting the data about society, economy and hydrology, etc, the social economic indexes and water demands of 2010, 2015, 2020, 2025, 2030 are forecasted. The quantity of surface water and ground water, water resources gross and its available quantity of these years are calculated. On the basis of these, water resources carrying capacities of five planning years under three schemes are calculated. Through comparing the results of the three schemes, the best scheme which can improve water resources carrying capacity of Zhengzhou is recommended. The results indicate that the model and method are reasonable. Meanwhile, the calculating results and analyzing conclusions may offer reference for water resources planning and management of Zhengzhou.