清洁场项目地下水污染迁移研究

Study on Groundwater Pollution Transfer in Clean Field Project

摘要: 工业成品生产过程中所产生的污染严重威胁地下水安全，如何对地下水水质进行有效预测成为了防控地下水污染风险的关键问题。本文基于某场地水文地质条件，建立了水文地质概化模型，采用FEFLOW软件模拟了研究区污染物在地下水中的迁移规律。研究表明，在30年模拟期中，在事故工况且人工防渗失效的影响下，污染物下渗后直接进入基岩风化裂隙水中，受地下水流向控制逐步向北部迁移扩散，超标污染晕在平面上逐年扩散，但污染物不会迁移出厂边界，对下游村庄和沙河基本无影响。

Abstract: The pollution caused by the production process of industrial finished products seriously threatens the groundwater safety, and how to effectively predict the groundwater quality is a significant issue to control the risk of groundwater pollution. Based on the hydrogeological conditions of a site, the hydrogeological generalization model was established, and the migration patterns of pollutants in groundwater were simulated by FEFLOW software. The result shows that, in 30 years, due to the accident works and the artificial seepage failures, pollutants will infiltrate directly into the crack water of the weathering bedrock, and it will be controlled by the groundwater flow and gradually spread to the northern. Furthermore, the excessive pollution halo diffuses on the planar diffusion year by year; however it will be not beyond the factory boundary, and have basically no impact on the downstream village.