Study on the influence of element existence morphology on geochemical sensitivity index
Geochemical sensitivity index is an important index to reflect the sensitivity of groundwater system to human activities and natural environment in a region.The geochemical susceptivity index(GSI)is the basis of geochemical susceptibility quantification.In the traditional method,the total a-mount of elements is directly substituted into the calculation when calculating GSI.The influence of el-ement forms on mineral precipitation and dissolution is ignored,which will lead to inaccurate calcula-tion results.In order to avoid such situation,an improved GSI calculation method was proposed in this paper.The improved method considered the existence forms of elements separately in the calculation process and was applied to the Huangshui river.The results showed that the complexation group would affect the judgment of the geochemical sensitivity index.The improved method took into account the different forms of elements.The presence of abundant forms of C,Mg and S had the greatest influence on the calculation results.This improved method took into account the existing forms of elements,which could improve the accuracy of GSI calculation and advance the quantitative study of geochemical sensitivity.
geochemical sensitivityform of component presencesaturation indexgroundwater chem-istry
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