数值模拟技术在污染地下水抽出-处理运行中的应用  

APPLICATION OF NUMERICAL SIMULATION TECHNOLOGY IN EXTRACTION ANDTREATMENT OF POLLUTED GROUNDWATER

作　　者：杜川[1,2] 李厚恩 陈素云[1,2] DU Chuan;LI Houen;CHEN Suyun(BGI Engineering Consultants Ltd.,Beijing 100038,China;The Environmental Geotechnical Engineering Technology Research Center of Beijing,Beijing 100038,China)

机构地区：[1]北京市勘察设计研究院有限公司,北京100038 [2]北京市环境岩土工程技术研究中心,北京100038

出　　处：《环境工程》2023年第7期102-108,共7页Environmental Engineering

摘　　要：数值模拟技术在污染地下水修复中具有非常广泛的应用,该技术通常应用于修复设计阶段,但该阶段获取的模型参数准确性在时间、空间尺度上存在一定程度局限性,使修复效果存在较多不确定性。将数值模拟技术应用于实际修复过程更具有实际意义。结合地下水污染修复实例,考虑对流、弥散、吸附等地块特征因素,建立三维数值模型进行地下水流及溶质运移模拟,以地下水修复过程中多个监测井的水位、水质监测数据作为模型参数修正,分析随着地下水修复过程的开展,污染物在地下水环境中的变化趋势,以及时调整抽出-处理方案,指导后续地下水修复实施。结果表明:基于修复过程中监测资料进行数值模型修正的方法,能更真实地反映模拟区地下水系统特征,更有效地指导后续修复实施工作。Numerical simulation technology is widely used in the remediation of polluted groundwater and usually used in the design stage of remediation technology.However,the accuracy of the model parameters obtained is limited to a certain extent in time and space,so there are many uncertainties in the remediation effect.It is more practical to apply numerical simulation technology to the actual repair process.In combination with the example of groundwater pollution remediation,a threedimensional numerical model was established to simulate groundwater flow and solute transport,considering the characteristics of land mass such as convection,dispersion,and adsorption.Parameter correcting was performed with monitoring data of water level and quality of several monitoring wells during groundwater restoration.The changing trend of pollutants in groundwater with the development of the groundwater remediation process was analyzed,and the extraction and treatment scheme was adjusted in time,in order to guide the implementation of subsequent groundwater remediation.The results indicated the method of numerical model modification based on the monitoring data,during the restoration process,can truly reflect the characteristics of the groundwater system in the simulation area,and effectively guide the follow-up restoration implementation.

关 键 词：污染地块 地下水抽出-处理技术 数值模拟 地下水溶质运移 污染物预测 

分 类 号：X523[环境科学与工程—环境工程]