基于MODFLOW的地下水Cr(Ⅵ)污染水动力场模拟预测研究

Simulation and prediction of hydrodynamic field of groundwater Cr(Ⅵ) pollution based on MOLDFLOW

随着社会和经济的快速发展,我国地下水污染问题已日益突出,地下水中Cr(VI)的污染已成为危害环境和人类健康的危险物质。由于Cr(VI)的毒性高、易迁移等特点,给地下水环境带来严重的安全隐患。在对某市城区水文地质及工程地质条件进行分析的基础上,依据2005年的资料用Visual Modflow进行参数率定,确定水文地质参数,建立了第四系地下水系统准三维非稳定流模型;再用2005-2009年的资料验证了模型的可靠性,利用此模型进行地下水流场模拟预测,并将现状条件下(2010年)Cr(VI)污染晕与预测的地下水流场形态进行叠加来预测Cr(VI)污染晕的发展趋势,为今后当地政府部门应对Cr(VI)污染地下水治理提供相关政策建议与决策参考,具有重要意义。

With the rapid development of society and economy,the groundwater pollution problem has become increasingly prominent,the pollution of Cr（Ⅵ） of the groundwater has become dangerous substances that harm environment and human health.Because of Cr（VI）＇s highly toxic,easy migration characteristics,it brings a serious security risk to the groundwater environment.A three dimensional unsteady groundwater flow model of quaternary groundwater system was built based on the analysis of hydrogeological conditions of a city.All the parameters were determined by Visual Modflow of the model using 2005＇s data;The reliability of the model was tested by 2005-2009＇s data.The paper used the model to carry on groundwater flow field simulation and prediction,use the status quo of Cr（Ⅵ） pollution halo（2010） and prediction of groundwater flow field morphology superimposed to predict the development trend of the Cr（VI） pollution,Has important significance for local government departments to respond to Cr（VI） contaminated groundwater governance to provide policy recommendations and decision-making reference.