Chemical Characteristics of Groundwater in Hanyin County
In order to study the chemical characteristics of groundwater in Hanyin County,a total of 100 spring or well water samples were collected and analyzed by mathematical statistics and Piper Plot.The results show that Ca2+is the dominant cation and HCO3-is the dominant anion in groundwater in the study area.The variation coefficient of Ca2+and HCO3-in groundwater is small,and the variation coefficient of Na+、Mg2+、SO42-and Cl-in groundwater is large,and the variation coefficient of Ca2+and HCO3-in groundwater is small,and the variation coefficient of Na+、Mg2+、SO42-and Cl-in groundwater is large.The results showed that Na+、Mg2+、SO42-and Cl-were sensitive factors,which were easy to change with environmental factors.The average pH value is 6.9,it is weak acidity in general,neutral or weak alkalinity in part,the pH of groundwater is stable,the mode is concentrated,and the change is small in region.The chemical types of groundwater in Hanyin County are mainly HCO3-Ca,supplemented by HCO3-Ca·Mg(Ca·Na),HCO3-Ca·Mg·Na and HCO3·SO4-Ca(HCO3·SO4-Ca·Mg).The water chemistry characteristics of groundwater in Hanyin.
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