The Research On The Treatment Of Water Pollutions And The Water Resources Protection In The Urbanization Process Of Changsha-zhuzhou-xiangtan Urban Group

With the process of urbanization, the harm of the water resource lackness and the water pollution be more and more serious. And the protections of water resource are demanded more and more effective.The water resource of Xiangiang River is the restrict factor of the 'process of urbanization. In recent years, the economy of Changsha-zhuzhou-xiangtan urban group is rising up rapidly, but the pollution of Xiangiang River Changsha-zhuzhou-xiangtan section is being more and more serious.In this paper, in order to search the protection and treatment of the water pollution of Xiangjiang River, it studied the coming way of pollutions. The pollution can be divided into two group by its resource, one is point pollution, and the other one is non-point pollution. And the precipitation runoff pollution is the second important pollution of non-point pollution. In the developed country, the precipitation runoff pollution is being regarded as seriously, however in china, research on this subject is very few. In this paper, a lot of researches such as the scour law , the load of pollution, the character of street surface sediment are all being carried on based on plenty of experimentation data, and the models such as the pollution load are be bring forward. Besides these, this paper also forecasted the pollution of the scour in Changsha. To find the control ways of scour pollution to river is the purpose of this research.The water pollution of Xiangiang River has done a lot of harm to the health of people, and the economy grows has been delayed by the pollution. This paper breaks through the limits and irrationalities of former methods, which uses the definite-water-quality model to simulate the hydrology and water quality under complex conditions. Based on calculating the distributing of the pollutant's concentration by using two-dimensional stochastic model of water quality, the probability calculating formula for determining the range of pollution zone in river is established. And the data of our field measurements testifies this model and calculating method. By using the two-dimensional stochastic model of water quality and the probability-calculating model of pollution zone, we improve the protection scheme for the drinkable water Protection Zone of Xiangjiang River for the first time. This paper offers the basis for policy-making in the exploitation and utilization of water resources for Changsha development.The model of surface water pollution barycenter (MSWPB) was used in this paper to quantitatively analyze the pollution status and the variation of pollution barycenterof the surface water for the first time, and it also forecasted the variation trend of pollution barycenter in this area of the river. By this kind of model, some scientific bases can be provided for pollution treatment and layout of drainage basin. From the results of the study, we can see that in order to keep the balance of the ecosystem it is very important to obey the order of nature in pollution management.