Drinking Water Source Contamination Risk Assessment Of Wangwu Reservoir

Surface drinking water source is an important component of water resources, which plays an important part in protecting residents, socio-economic development,and maintaining the ecological environment balance. Surface water source has a bearing on the people's health and human survival. However, water environment becomes more and more serious, with the rapid development of economy, increasing of people living standard, and the acceleration of urbanization and the contaminant discharge amount increase. Study on surface drinking water source contamination risk assessment will provide the important theoretical basis for drinking water source conservation..Surface drinking water source contamination risk refers to the possibility of coming up to the unacceptable level when the surface water source suffers the pollution as a result of the human activity and the result of the interaction of the surface water source pollution receiving capacity and pollution load. The surface water source vulnerability reflects to the pollution load because of the human activity; the surface water source sensitivity reflects to the pollution receiving capacity and the pollution load because of the human activity. The surface water source contamination risk assessment result will obtain by comprehensive analyzing the surface water source vulnerability and sensitivity. In accordance with this evaluation idea, utilization and protection problems of surface water source in Northern China, study on surface water source contamination risk assessment was conducted, taking Wangwu reservoir as an example. The main contents of the study are as follows:(1) A comprehensive analysis of the concept of the surface drinking water source contamination risk and summary of the research status and level about the surface drinking water source contamination risk and correlative study at home and abroad were conducted, and the existing problems in studies on the surface drinking water source contamination risk assessment were also pointed out.(2) The analogy method was applied to delineate Wangwu reservoir into three-level protection areas. A detailed investigation on the contamination sources in the study area which is the catchment area of Wangwu reservoir was made. The contamination sources information, along with contaminant source type, name, code, position, potential contamination, and so on was archived to prepare for later period work.(3) From the delineation result of Wangwu reservoir protection areas and the the contamination sources investigation, the surface water source vulnerability was assessed based on the number and proximity of contamination sources. The assessment result was analyzed.(4) The concept, influence factors and assessment method of the surface water source sensitivity were discussed. The sensitivity of Wangwu reservoir water source was assessed based on the reservoir size, surface water intake construction and integrity, and WRASTIC index. The assessment result was analyzed.(5) The surface water source contamination risk assessment result was obtained by comprehensive analyzing the surface water source vulnerability and vulnerability results. Then the process of contamination risk assessment was analyzed, and suggestions for Wangwu reservoir drinking water source contamination risk management were proposed.