| In accordance with hydrogeological condition of Yinchuan region,two groundwater systems are presented in the paper,they are the phreatic water systems with single-layer structure and phreatic water together with shallow confined groundwater system.The component of the major ions,mineralization degree and chemistry types and their variations of the above-mentioned groundwater systems are analyzed.The results show that,from West to East and from North to South,water quality degrades gradually,mineralization degree raises,and the variations of the major ions and mineralization degree are similar,water chemistry type transfer from HCO3·SO4-Ca·Mg to SO4·Cl-Na·Mg.The variation characteristics of shallow confined groundwater are similar with phreatic water. |