基于地理信息技术的典型地下水污染评析

Evaluation of Typical Groundwater Pollution Based on Geographic Information System

以山东省莒南县大店镇西侧冲积平原为研究区,基于地理信息技术对研究区地下水污染状况进行了调查和评价。结果表明:研究区地下水存在严重的污染现象,污染因子主要为硝酸盐、氨氮、耗氧量、硫酸盐、总硬度、溶解性总固体。其中硝酸盐污染主要由农业面源污染所致;氨氮、耗氧量污染主要由生活源污染引起;而硫酸盐、总硬度、溶解性总固体污染与区域废水产排企业不合理排放废水有关。根据研究区地下水污染状况、污染成因及空间分布特征,提出了通过监测自然衰减技术进行污染防控的措施,为相关场地地下水污染调查研究和污染防治提供参考。

Taking the alluvial plain on the west of Dadian Town,Junan County,Shandong Province as the study area,groundwater pollution status is investigated and evaluated based on the geographic information system.The results show that the groundwater in the study area is seriously polluted and the main pollution factors include nitrate,ammonia nitrogen,oxygen consumption,sulfate,general hardness and total dissolved solids.Among them,nitrate pollution is mainly caused by agricultural non-point source pollution,ammonia nitrogen and oxygen consumption pollution by the pollution of rural life,and sulfate,general hardness and total dissolved solid pollution is related to the unreasonable discharge of wastewater by regional wastewater production and discharge companies.According to the groundwater pollution status,pollution causes and spatial distribution characteristics,the method of pollution prevention and control based on groundwater monitored natural attenuation is put forward,which can provide references for the investigation and prevention of groundwater pollution in relevant sites.