基于Visual MODFLOW的某焦化项目地下水污染物运移规律研究

Research on groundwater pollutant transport lawof a coking project based on Visual MODFLOW

为研究某焦化项目建设对场区及周边地下水造成的影响,科学合理的保护地下水环境,以该项目为研究对象,在查明评价区水文地质条件的基础上,构建了水文地质概念模型,利用Visual MODFLOW软件建立了研究区地下水数值模拟模型,模拟了不同时段污染物在含水层中的分布特征及迁移规律,根据模拟预测结果,泄漏污染物沿含水层向下游有一定程度的扩散,但各污染晕超标范围并未运移出项目厂界,污染物浓度随时间逐渐降低,影响范围逐渐减小至消失,其下游地下水环境保护目标污染物预测浓度均满足标准要求。研究成果为项目建设地下水环境影响评价和地下水污染防治提供了技术支撑。

In order to study the impact of a coking project construction on the site and surrounding groundwater,and to scientifically and reasonably protect the groundwater environment,a hydro-geological conceptual model was constructed based on the investigation and evaluation of the hydro-geological conditions in the area.Visual MODFLOW software was used to establish a numerical simulation model for the groundwater in the study area,simulating the distribution characteristics and migration patterns of pollutants in the aquifer at different time periods,according to the simulation prediction results,the leaked pollutants have a certain degree of diffusion downstream along the aquifer,but the exceeding range of each pollution halo has not been moved out of the project boundary.The concentration of pollutants gradually decreases over time,and the scope of impact gradually decreases to disappear.The predicted concentration of pollutants for downstream groundwater environmental protection meets the standard requirements.The research results provide technical support for groundwater environmental impact assessment and groundwater pollution prevention of project construction.