Study On Groundwater Pollution And Vulnerability In The Yiluo River Basin

Based on the“groundwater pollution monitoring index screening”from geological environment monitoring institution of China.Taking the groundwater in Yiluo River Basin as the object,using groundwater pollution investigation and test data to conduct research on groundwater pollution and vulnerability.Based on the test data of 78 groundwater samples,single-index method?single-index comprehensive method and fuzzy method were used to study the quality of groundwater.The single-index method show that TH?NO₃^-?TDS?SO₄^2-are the main elements affecting groundwater quality.The exceeding rate of single-index comprehensive and fuzzy mathematics is 55.13%?19.23%.The fuzzy mathematics emphasize the impact of elements,It's a better way to description the characteristics of regional groundwater.By Grubbs method and SPSS software determine the groundwater background values in the area.The single-index method showed that:SO₄^2-?Fe?Cl^-?Mn?TH?NO₃^-?TDS and naphthalene are the main pollution indicators.Based on impact on human health,classify and assign weights to the index,combined with single-index results to determine groundwater level.Factor analysis method was used to analyze the characteristics of groundwater pollution in the study area.Combined with geological and hydrogeology of the study area,referncing the index of DRASTIC,using the square root method to determine the weight,each indicator layer was subdivided and superimposed by Geographic Information System to obtaine the vulnerability district map of the study area.