修正的灰色聚类关联法对晋江市浅层地下水质量综合评价

Modified Gray Cluster Relation Method on Comprehensive Evaluation of the Shallow Groundwater Environmental Quality

将浅层地下水看作是一个灰色系统,并运用灰色聚类与灰色关联理论进行综合评价.引入指数函数拓宽白化函数的覆盖范围,结合指标变权法确定权重计算综合灰色关联度,得出评价等级及优劣次序.评价结果表明晋江市绝大部分区域浅层地下水水质状况良好,影响其地下水质量的指标主要为TDS、Mn2+、NO-3、NO-2、NH+4、Cl-;水质较差区主要分布于境内沿海湾、工业较密集区及引污水灌溉农田地区,说明原生地质与偏酸性土壤环境、海水入侵、地表水下渗、工农业发展和人类活动分别是造成本区水质变化的原因.

Take the shallow groundwater as a grey system, and makes a comprehensive evalua- tion using grey clustering and grey relational theory. The introduction of index to broaden the cover- age of whitenization weight function, combining the index variable weight method to determine the weight calculation of comprehensive grey correlation degree. The evaluation results showed that most of shallow groundwater quality is good in Jinjiang city, the influence of the groundwater quality index are TDS, Mn2＋ , NO3, NO2-, NH4＋ , C1- ; water quality is poorer areas are mainly distributed in the territory along the Gulf, industrial intensive areas and lead to farmland sewage irrigation area, that the original geological and acidic soil environment, seawater intrusion, infiltration of surface water, industrial and agricultural development and human activities are the reasons for the changes made in the area of water quality.