西部生态环境脆弱区地下水水化学特征分析.

In order to evaluate thehydrochemical characteristics and evolution of groundwater in Yushen mining area and Shenfu mining area, 53 samples of groundwater of the researched area were collected and tested. It calculated the contribution rates of cations and anions, correlation coefficient matrix method, piper trilinear diagram, Gibbs distribution graph and milligram equivalent ration with Na+ and Cl- by mathematical statistics. It analyzed the characteristics of groundwater ion and hydrochemical characteristics and drew the isogram of groundwater hardness in the area and zoning map of hydrochemical type. The results show that the groundwater in the area is weak alkaline water. The less solubility of Ca2+ is precipitated out, which is affected by evaporation, is the highest contribution rate. The groundwater TDS content of Malan loess is the lowest and the groundwater TDS in the blunt pluvial aquifer is the highest. The total hardness increases gradually from the blown-sand region to the loess area. Ca2+ and SO2-4 are highly correlation with TDS. Groundwater hydrochemical characteristics are mainly controlled by water-rock interaction, the groundwater is dominated by HCO3 water in the blown-sand region and it is dominated by HCO3 • SO4 water in loess ridge-hilly area. [ABSTRACT FROM AUTHOR]