Analysis of Groundwater Hydrogen and Oxygen Isotope Characteristics of Karst Basin System in Qingtang,Southern Jiangxi
Based on the Ganjiang River basin hydrogeological survey(1∶50,000 Qingtang area)project,the characteristics of hydrogen and oxygen isotopes of groundwater in Qingtang Karst basin system were studied by means of ground survey,groundwater sample collection,experimental test and comprehensive data analysis.The results show that the δ18O,δD and d values of different groundwater sampling points in the basin are significantly different.The δ18O and δD value ranged from-6.55‰ to-4.45‰,-38.25‰ to-27.90‰,with an average value of-5.85‰ and-34.47‰,respectively.The The d value ranges from 7.70 to 14.15,with an average value of 12.34.The comprehensive analysis of hydrogen and oxygen isotope characteristics of groundwater in Qingtang Karst Basin reveals that the recharge of groundwater in this area mainly comes from atmospheric precipitation.There is a close hydraulic relationship between quaternary groundwater and karst groundwater,and a certain correlation between groundwater and surface water,which provides a basis for groundwater pollution prevention in this area.
groundwaterhydrogen and oxygen isotopesdeuterium excess parametersmeteoric water lineQingtang karst basinSouthern Jiangxi