基于DPSIR模型的地下水饮用水源地安全评价指标体系研究

Study on the Safety Assessment Index System of Underground Drinking Water Sources Based on the DPSIR Model:A Case Study of Shallow Aquifer in the Hutuo River Plain

为系统客观的评价地下水饮用水源地的安全状态,基于“驱动力-压力-状态-影响-响应”(DPSIR)框架初步建立备选评价指标,运用专家咨询法对备选指标进行筛选及合理性检验,采用层次分析法确定指标权重,构建地下水饮用水源地安全度综合评价体系。以滹沱河浅层孔隙水水源地为例,确定了包含5个准则层,18个指标的地下水饮用水源地安全评价指标体系。滹沱河浅层孔隙水水源地实例研究表明,准则层中压力系统和状态系统所占权重较大,分别为0.257和0.339;水源地安全度为0.67,尽管处于较安全级别,但非常接近警戒值(0.4~0.6)。通过实例分析可知,筛选的指标具有一定的实用性,可以为评价浅层孔隙水水源地的安全状态及面临的风险提供参考。

In order to systematically and objectively assessment the safety of underground drinking water sources,preliminary index were established based on the‘Driving force-Pressure-State-Impact-Response’(DPSIR)framework,and then the Delphi method was used to choose and rationality test,using the analytic hierarchy process to determine the indicator weights and the comprehensive assessment index was built for the safety assessment of groundwater drinking water sources.Taking the drinking water source in the shallow aquifer of the Hutuo River plain as an example,the safety assessment indexes include 5 criterion layers and 18 indexes.The case study shows that the pressure subsystem and the state subsystem of the criterion layer occupy high weights,0.257 and 0.339 respectively.the degree of the safety for the groundwater sources in the Hutuo river plain is 0.67,which is at a relatively safe level,but very close to the alert value(0.4-0.6).Through the case study,it can be concluded that the selected indexes have certain practicability,which can provide a reference for evaluating the safety status and risks of drinking water sources in the shallow aquifer.