【作者】 刘旭东；

【导师】 邓跞； 黄涛；

【作者基本信息】 西南交通大学 ， 环境工程（专业学位）， 2019， 硕士

【摘要】 针对工业化加速发展和人口剧增所带来地下水污染问题成为制约可持续发展的关键因素的实际,本论文以四川南充化学工业园河西片区为实例,通过标识出区域地下水脆弱程度的不同,进而规划地下水脆弱性分区,以期为四川南充化学工业园区各级管理部门指导企业完善地下水环境保护对策提供技术支撑,对于我国地下水环境的保护工作具有非常重要的意义。1.论文从国内外地下水脆弱性的概念、地下水脆弱性评价方式入手,结合研究区实际情况,对区域的自然地理、气象水文、地质条件、人类活动特点等方面进行了针对性的分析。在传统DRASTIC模型评价因子的基础上,添加了受人类活动影响的评价因子,即土地利用现状和地下水开采程度,建立优化改进后的DRASTIC模型。采取了ArcGIS和地下水脆弱性评价模型相结合的方式进行地下水脆弱性评价。2.论文分别通过传统DRASTIC模型指标权重确定方法以及通过主成分-因子分析法、相关分析法及层次分析法确定评价指标的权重,形成2种评价方式,评价结果整体一致:评价结果表明在河流阶地等第四系地区脆弱性较高,其他地区脆弱性相对较低,呈现出了一定的规律性,地下水脆弱性由西部向东部嘉陵江逐渐变弱。3.根据采样点中水质超标点的分布情况对2种评价结果进行检验,检验表明2种评价分区图在基本上满足检验分区的脆弱性大小与该区域中采样点水质呈正相关的检验准则,对比分析后发现,改进DRASTIC模型较于传统DRASTIC模型对地下水脆弱性评价具有更好的效果,能体现地下水系统的整体性,减小人类主观判断的影响,使得权重值更加合理。本文最后根据评价结果提出了建议,在脆弱性高的地区修建有地下水下渗风险设施时,必须进行防渗措施,有必要时应该提升防渗等级,将污染物泄漏的环境风险事故降到最低程度。更多还原

【Abstract】 In view of the fact that the problem of groundwater pollution caused by accelerated industrialization and population growth has become a key factor restricting sustainable development,this paper takes the Hexi area of Nanchong Chemical Industrial Park in Sichuan as an example to identify the regional groundwater vulnerability and then plan.Groundwater vulnerability zoning,in order to provide technical support for the management departments of Sichuan Nanchong Chemical Industrial Park to guide enterprises to improve groundwater environmental protection measures,is of great significance for the protection of groundwater environment in China.1.Based on the concept of groundwater vulnerability and groundwater vulnerability assessment at home and abroad,combined with the actual situation of the study area,the paper analyzes the regional natural geography,meteorological hydrology,geological conditions and human activities.Based on the traditional DRASTIC model evaluation factor,the evaluation factors affected by human activities,namely the status of land use and the degree of groundwater exploitation,were added to establish an optimized and improved DRASTIC model.Groundwater vulnerability assessment was carried out by combining ArcGIS and groundwater vulnerability assessment models.2.The paper uses the traditional DRASTIC model index weight determination method and the principal component-factor analysis method,correlation analysis method and analytic hierarchy process to determine the weight of the evaluation index,and forms two evaluation methods.The evaluation results are consistent: the evaluation results indicate that the river terraces are The Quaternary areas are highly vulnerable,and the fragility of other areas is relatively low,showing a certain regularity.The groundwater vulnerability is gradually weakened from the west to the eastern Jialing River.3.According to the distribution of water quality over-punctuation points in the sampling points,the two evaluation results are tested.The test shows that the two evaluation sub-graphs basically meet the test criteria of the test area’s vulnerability and the water quality of the sampling points in the area.It was found that the improved DRASTIC model has a better effect on the groundwater vulnerability assessment than the traditional DRASTIC model,which can reflect the integrity of the groundwater system and reduce the influence of human subjective judgment,making the weight value more reasonable.At the end of the paper,based on the evaluation results,it is suggested that when a groundwater infiltration risk facility is built in a highly vulnerable area,anti-seepage measures must be taken.If necessary,the anti-seepage level should be increased to minimize the environmental risk accident of pollutant leakage.更多还原