中文摘要：

特殊脆弱性评价是地下水污染防治的基础。该文以地下水硝酸盐污染典型区—沙颍河流域为研究区,基于地下水硝酸盐污染成因分析,建立了以地下水埋深（D）、净补给量（R）、含水层富水性（A）、土壤类型（S）、地形坡度（T）、包气带介质类型（I）、污染物输入强度（P）、土壤有机质含量（O）为指标体系的DRASTIPO评价模型,采用主成分-因子分析法确定指标权重,并对浅层地下水硝酸盐特殊脆弱性进行了评价。2013年8月在研究区采集浅层地下水样品48组,通过分析采样点特殊脆弱性指数与地下水NO3-浓度之间的相关性,相关性系数R2为0.714,表明该评价模型是可靠的。

英文摘要：

Assessment of groundwater specific vulnerability is the foundation of groundwater pollution prevention. The study evaluates the nitrate specific vulnerability of shallow groundwater in Shaying River Basin, where is a typical area of groundwater nitrate pollution. DRASTICPO model is established based on the cause of groundwater nitrate pollution, which involves depth to the water table （D）, net recharge （R）, water yield property of aquifer（A）, soil type（S）, topography（T）, impact of the vadose zone （I）, pollutant input intensity （P）, and the content of soil organic matter （O） as evaluation indicators. In addition, Principal component-factor analysis method is used to determine the weight of indicators. In August 2013, 48 shallow groundwater samples have been collected in the study area in order to test the reliability of evaluation result. The correlation between special vulnerability index and NO3- concentration of groundwater samples is analyzed. The result shows that the correlation coefficient R2 is as high as 0.714, and proves that the assessment method is reliable.