To explore the impact of land use on the hydrochemical characteristics of surface water and groundwater in Tianjin,hydrochemical methods were used to test the hydrochemical components of main river water and nearby groundwater samples in Tianjin,and the spatial characteristics of hydrochemical characteristics were analyzed.The results showed that:① The main hydrochemical type of surface waterwasNa·Mg-Cl·HCO3,and the main hydrochemical type of groundwater was Na·Ca-HCO3;② The mass concentration of NO3-in water was high in cultivated land types,while mass concentration of K+was high in some cultivated land and grass-land types.The mass concentration of Na+and Cl-in water was high in urban and rural residential in-dustrial and mining land types.③ Ca2+,Mg2+,and HCO3-in surface water and groundwater mainly came from the weathering and dissolution of carbonate rocks,SO42-partially came from the dissolution of evaporite rocks,and the mass concentration of Na+,Cl-,NO3-were mainly influenced by human activities.
关键词
水化学特征/地表水/地下水/土地利用类型/离子来源
Key words
hydrochemical characteristics/surface water/groundwater/type of land use/ion source
维普
万方数据