基于GMS处置有机污染质运移数值模拟研究

Numerical simulation research of the organic pollutants migration of hazardous waste disposal center based on GMS

使用地下水数值模拟系统GMS的MODFLOW模块和MT3D模块对山东某地危险废物处置中心进行地下水流场和有机污染质运移数值模拟。建立了水文地质概念模型,含水层概化为潜水含水层和承压水含水层两层,考虑了非正常工况和事故工况两种情景模式,将危险废物填埋库区渗滤液收集和导排系统概化为点源。分析预测,两种工况下污染羽有较大差距,虽然COD浓度超过III类地下水的标准限值,但污染范围十分有限,对周边地下水环境的影响较小。

The paper simulated the groundwater flow field and the organic pollutants migration in a hazardous waste disposal center in Shandong by the MODFLOW module and MT3D module of Groundwater Modeling Systems （GMS）. After building the hydrogeological conceptual model, the aquifer was turned into two layers of unconfined aquifer and confined water aquifer, and considering two scenarios mode of abnormal and accident conditions, then the leachate collection and guide line system of hazardous waste landfill reservoir was generalized into a point source. According to the analysis of the forecast, the pollution plume had larger difference in two kinds of working conditions, although the COD concentrations exceed the standard limit of class III groundwater, pollution range is very limited and had little influence on the surrounding groundwater environment.