基于Visual MODFLOW的潢川经济开发区地下水环境影响分析

Analysis of the Environmental Impact of Groundwater in Huangchuan Economic Development Zone Based on Visual MODFLOW

地下水是人类赖以生存的重要资源,随着城市化、工业化进程的加快,人类活动对地下水环境的影响受到越来越多学者的关注。为预测潢川经济开发区建设对地下水环境的影响,科学评估建设项目的合理性,采用数值模拟法,利用Visual MODFLOW软件建立了地下水流动模型和溶质运移模型,分别预测了现状情景和规划情景下地下水特征污染因子的运移变化规律。结果表明:现状条件下,第一含水岩组的地下水中氨氮浓度的超标范围较小,且对第二含水岩组地下水中的氨氮浓度基本无影响;规划情景下,第一含水岩组的地下水中氨氮浓度的影响范围相对较大,且对第二含水岩组地下水中的氨氮浓度有一定范围的影响,但对地下水集中供水水源地的氨氮浓度基本无影响。

Groundwater is an essential resource for human survival.With the acceleration of urbanization and industrialization,the impact of human activities on the groundwater environment has attracted more and more scholars′attention.In order to predict the impact of the construction of Huangchuan Economic Development Zone on the groundwater environment and scientifically evaluate the rationality of the construction project,a groundwater flow model and a solute transport model are established by using the numerical simulation method and Visual MODFLOW software.The migration and change rules of groundwater characteristic pollution factors under the current situation and planning scenarios are predicted respectively.The results are as follows.Under the current conditions,the ammonia nitrogen concentration in the groundwater of the first water bearing rock group has a relatively small range of excess,and has basically no effect on the ammonia nitrogen concentration in the groundwater of the second water-bearing rock group.Under the planning scenario,the influence range of ammonia nitrogen concentration in groundwater of the first water bearing rock group is relatively large,and it has a certain range of influence on the ammonia nitrogen concentration in the groundwater of the second water bearing rock group,but has no effect on the ammonia nitrogen concentration of the groundwater centralized water supply source area.