A study of shallow groundwater quality distribution in the Ordos Cretaceous Artisan Basin based on GIS
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摘要: 文章以地下水质量标准为基础,结合鄂尔多斯白垩系盆地水资源现状,构建了研究区地下水水质评价指标体系,并对国标中部分指标限值提出了修正建议。通过建立浅层地下水水质模糊综合评价模型,对研究区地下水水质进行了综合评价,并以GIS为平台,对水质空间分布状况及其规律进行了研究。结果表明:总硬度、硫酸盐、溶解性总固体、氯化物指标的水化学分布对研究区地下水水质的影响最为明显,同时,盆地浅层地下水水质总体上相对较好,大部分地区地下水水质优于Ⅳ类,完全满足生活生产用水要求。Abstract: Water quality evaluation and distribution regulation analysis of groundwater in the Ordos Cretaceous Artisan Basin are of important theoretical significance and social values since they may act as scientific guidance for groundwater resources development and groundwater pollution protection.Based on the Groundwater Quality Standard and water resources present in study area,this paper establishes an evaluation indexes system and modifies the unreasonable threshold values of some evaluation indexes.The Fuzzy synthetic evaluation model is used to evaluate shallow groundwater quality.With the platform of GIS,the distribution regulation of groundwater quality is studied.Results indicate that the indexes of total hardness,sulfate,total dissolved solids and chloride are the main factors affecting the groundwater quality.The shallow groundwater quality is quite well.The groundwater quality in most parts of the area is better than the IV grade which is good enough to serve as domestic and productive water supply in the basin.
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