某水源地地下水中石油类有机污染特征

Characteristics of Typical Organic Pollutant in a Groundwater Source

利用GIS空间分析平台的反距离权重法插值获取中国北方某典型岩溶水源地2008—2010年地下水中石油类有机污染物浓度空间分布,基于SPSS软件的Spearman秩相关系数法获取地下水中石油类有机污染物的变化趋势,在此基础上叠加地下水水动力因素,并结合2016年地下水典型有机污染物空间分布状况获取地下水有机污染风险特征,结果表明:研究区59.04%的区域地下水水质趋于好转,29.55%的区域水质呈恶化趋势,水质恶化区集中在石化公司新区和旧区的下游;地下水中总挥发性有机物浓度与石化公司新旧区、排污渠、排污渗坑及导水系数的空间分布密切相关;石化公司新区污染源及其下游(Ⅰ-Ⅰ')典型石油有机污染物检出率高且浓度大,需加强防漏及采取污染防治措施;石化公司旧区下游(Ⅱ-Ⅱ')有机污染风险高且呈恶化趋势,需要采取污染防治措施。

The paper used the Inverse Distance Weighted（ IDW） based on GIS spatial analyst platform to obtain the spatial distribution characteristic of petroleum of a typicalkarst water source in North China and used Spearman＇s rank-order correlation coefficient based on SPSS software to obtain the spatial temporal variation trend of petroleum. Characteristics of groundwater organic pollution risk could be obtained by combining the spatial temporal variation trend of petroleum,groundwater hydrodynamic conditions and the spatial distribution of typical petroleum compounds detected in the year of 2016. The improved and obviously improved trend of petroleum in groundwater account 59.04% of the study area,while the obviously deteriorated and deteriorated trend account 29.55% of the study area,where are located in the new area and the downstream of old area of petrochemical company. The total concentration of volatile organic compounds in the groundwater source has close relationship with the location of the old and new petrochemical company,spatial distribution of effluent drains,effluent percolation pits and the transmissivity. Areas of the new petrochemical company and its downstream（ Ⅰ-Ⅰ＇） have high concentration and detection rate of typical organic compounds where should take actions to avoid leak and protect groundwater environment. The downstream（ Ⅱ-Ⅱ＇） of the old petrochemical company have high pollution risk and deteriorated trend of petroleum where should take prevention and control measures in time.