工业重金属废水污染下地下水环境易损性分区评价研究

Evaluation on Vulnerabilities of Groundwater Environmental to Heavy Metal Wastewater

传统评价方法将地下水环境整体作为对象,存在较大误差,为此,提出一种新方法评价地下水环境易损性。选取地下水环境易损性评价指标,制定评价指标评分标准;采用MapGis软件单元剖分研究区域,提取评价指标数据;应用主成分-因子分析法确定地下水环境易损性评价指标的权重值,通过综合指数法计算地下水环境易损性指数;利用易损性分区表实现了工业重金属废水污染下地下水环境易损性的分区评价。结果表明:提出方法评价误差下降了0.503,充分表明此方法地下水环境易损性评价效果较好。

The traditional evaluation method takes the whole groundwater environment as the object,which has large error.Therefore,a new method is proposed to evaluate the vulnerability of groundwater environment.The evaluation index of groundwater environmental vulnerability was selected and the scoring standard of the evaluation index was developed.MapGIS software unit is used to divide the study area and extract the evaluation index data.The weight value of groundwater environmental vulnerability evaluation index was determined by principal component factor analysis method,and the groundwater environmental vulnerability index was calculated by comprehensive index method.The vulnerability zone table is used to evaluate the vulnerability of groundwater environment under industrial heavy metal wastewater pollution.The results show that the evaluation error of the proposed method decreases by 0.503,which fully indicates that the evaluation effect of the proposed method is better.