Analysis And Evaluation Of Surface Water Environment Carrying Capacity In Liangzhou District

Water environment is a key factor underpinning the region’s development of population, economy and society. In recent years, the relationship between ecological environment and human activities, sustainable socio-economic development is discordant because of the increase of water consumption caused by population growth, social production expansion, acceleration of urbanization, etc. Many cities in Northern China is suffering from a shortage of water resources, deterioration of water environment problems, and the Northwest is particularly serious. Naturally, to solve the problem of water environment and population balance, regional socio-economic has become a priority to achieve urban sustainable development. It is a basis of judging the degree of coordination between the regional water environment ecosystems and economic construction, population development in a given period to analyze the water environment carrying capacity of Northwest arid regions, which can also contribute to the sound development of urban economy and population.Liangzhou District is one of many arid northwest cities. The paper takes Liangzhou District as an example to analyze and expore the existed problem of water environment by understanding the present situation of water resources, water environment and development and utilization of Liangzhou District. Estimate population and size of economic development in 2020, linking which to corresponding pollution discharge coefficient of industry to figure out pollutants’ emission. Calculate the current water environment capacity of COD and NH3-N in Liangzhou District by the use of river’s one dimensional model and pollutants’ generalization. Comparing the above two numbers, evaluate water environmental capacity. The results show that the emission of both COD and NH3-N are over of which current water environment capacity, and the overload index are 0.12,0.15, both mildly overload.