Characteristics and Causes of Shallow Groundwater Salinization in Juye County,Shandong Province
To gain a deeper understanding of the hydrochemical characteristics and causes of shallow groundwater forma-tion,20 groups of shallow groundwater samples were collected in Juye County,Shandong Province,and the test results of the groundwater samples were statistically analyzed by methods such as mathematical statistics,Durov diagram,principal component analysis,ion ratio and mineral saturation index,so as to study the characteristics and generation mechanism of groundwater salinization.The results show that the shallow groundwater in the study area is generally weakly alkaline,and the mass concentration of total dissolved solids is 1 680～14 000 mg/L.The chemical types of groundwater are mainly divided into SO4·Cl-Na·Mg,HCO3·SO4·Cl-Na·Ca·Mg,HCO3·SO4-Na·Mg and HCO3·SO4·Cl-Na·Mg.The salini-ty degree of shallow groundwater is mainly affected by evaporation and concentration.The ions in water mainly come from the dissolution of silicate and rock salt minerals,and potassium salt,gypsum,rock salt and anhydrite are the main sources of total dissolved solids.The main minerals that cause groundwater salinization in the study area are potassium salt and rock salt.
shallow groundwatersalinizationtotal dissolved solidsmineral saturation index
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