Hydrochemistry and isotopes of shallow groundwater in the Jinan spring catchment

Hydrochemistry and stable isotopes of shallow groundwater and surface water were systematically analyzed in this paper.Combined with topographical and hydrological conditions,this paper analyzed thoroughly different recharge sources of shallow groundwater and surface water in different areas,and revealed the hydraulic connection between the karst groundwater and the shallow groundwater.The investigation and research results show that the shallow groundwater mainly receives recharge from precipitation in urban area and the eastern suburb;and mainly comes from underlying karst groundwater and surface water in western suburb and Pingandian district.The results may provide important base in protecting the Springs and optimizing groundwater exploitation in the catchment.