某煤矿氧化塘废水处理系统对区域地下水环境的影响研究

发布时间：2018-03-21 03:26

本文选题：地下水　切入点：污染　出处：《内蒙古大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文以地下水流运动的渗流基本理论为依据,分析内蒙古自治区呼伦贝尔市某煤矿氧化塘废水对地下水的影响。在系统分析区域地质和水文地质条件,包括地层岩性、地下水补径排特征、水文地质特征及地下水动态影响因素等基础上,建立研究区合理的水文地质概念模型和数学模型,再现研究区水文地质情况,利用GMS(地下水流系统软件)软件中的MODFLOW模块模拟研究区地下水流场。建立研究区污染物溶质运移的水文地质概念模型和相对应的数学模型,并且运用GMS中MT3D模块进行地下水水流与污染物溶质运移的动态模拟;针对矿区氧化塘废水等污染源进行数值仿真研究,对污染的路径,污染范围,进行合理的分析,并提出相应的预防及治理措施。主要结论如下:本次研究中,将研究区分为三层,水文地质参数分为五个区,通过查阅相关资料,设置合理的参数,调整参数参后,模型能够稳定运行,相对真实的反映研究区地下水系统运动特征。对研究区进行溶质运移模拟,第四系含水层设为目标含水层。研究区溶质运移模拟中,将氯离子、硫酸根离子、氟离子分别作为溶质运移的示踪离子和模拟因子。在不考虑吸附作用、化学反应等因素下,模拟结果显示随时间的推移污染晕不断扩大,随着水流污染晕中心向下游迁移,且污染范围逐步在增大。氧化塘废水系统废水对下游浅层地下水具有一定的影响。
[Abstract]:Based on the basic seepage theory of groundwater movement, this paper analyzes the influence of oxidation pond wastewater from a coal mine in Hulunbeir City, Inner Mongolia Autonomous region, on groundwater. The regional geological and hydrogeological conditions, including stratigraphic lithology, are systematically analyzed. On the basis of the characteristics of recharge and drainage of groundwater, hydrogeological characteristics and influencing factors of groundwater dynamics, a reasonable hydrogeological conceptual model and mathematical model are established in the study area to reproduce the hydrogeological situation in the study area. The groundwater flow field in the study area is simulated by using the MODFLOW module in the software of GMS (groundwater flow system Software). The hydrogeological conceptual model and corresponding mathematical model of pollutant solute transport in the study area are established. The dynamic simulation of groundwater flow and pollutant solute transport is carried out by using MT3D module in GMS, and the pollution path and range of pollution are analyzed reasonably by numerical simulation of pollution sources such as oxidation pond wastewater in mining area. The main conclusions are as follows: in this study, the study is divided into three layers, hydrogeological parameters are divided into five areas, through consulting relevant data, setting up reasonable parameters, adjusting parameters, The model can operate stably and reflect the characteristics of groundwater system movement in the study area. The solute transport simulation is carried out in the study area, and the Quaternary aquifer is set as the target aquifer. In the simulation of solute transport in the study area, chloride ion is used. Sulphate ions and fluorine ions are used as tracer ions and simulation factors for solute transport respectively. Without considering adsorption and chemical reaction, the simulation results show that the pollution halo increases with time. As the center of water pollution halo moves downstream and the range of pollution increases gradually, the wastewater from oxidation pond wastewater system has a certain influence on the shallow groundwater in the lower reaches.
【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X752;X523

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