Establishment Of Index System About Risk Of Tongjiang Groundwater Resource Pollution

Groundwater is one of the important water sources for people’s life. With the development of society, the quantity of groundwater source in our country is increasing day by day, and the exploitation of underground water is gradually increasing. Groundwater extraction is not only lead to the regional groundwater draw down, also can cause environmental pollution, ecological problems, and even endangers the health of human life. Due to contamination of groundwater environment is difficult to control, this study through a comprehensive analysis of the external and exploration environmental impact to establish an assessment index system of groundwater pollution. To evaluate the risk of contamination of groundwater source area by using the index system, according to the evaluation results to provide measures and suggestions of groundwater pollution risk.The research scope is Tongjiang water source area of 35 square kilometers, based on the groundwater in the formation of the transfer motion, groundwater pollution mechanism, environmental pollution risk theory, to establish the evaluation index system of Tongjiang groundwater source pollution risk.There are 4 first level indexes and two 17 level indexes. It includes the present situation of groundwater pollution, groundwater pollution source, groundwater mining influence and groundwater anti fouling performance. By constructing the risk assessment model of groundwater pollution and using analytic hierarchy process to assign the weight of all indexes. Finally, the risk of groundwater pollution is divided into high, medium and low grades. To take advantage of the system with Tongjiang water source of groundwater pollution risk evaluation, Tongjiang groundwater final score is 70.5512, the groundwater source pollution risk assessment level is "medium". Through the analysis to determine the index system of groundwater water pollution risk, the pollution risk management measures are put forward, such as division of protected areas of water sources, from many aspects to take groundwater protection measures, and pay attention to the protection of the ecological environment around the water source area and so on. The study provides a new index system for the identification and prevention of groundwater pollution risk in different areas; it has important theoretical and practical significance.