Million-year-old groundwater revealed by krypton-81 dating in Guanzhong Basin, China

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2017,（17）
• 页码范围: 1181-1184
• 页数: 4页
• 语种: 英文

摘要

Groundwater age,defined as the mean subsurface residence time spent isolated from the atmosphere,is of crucial significance for managing water resources and industrial waste.It is also very useful for understanding subsurface contaminant transport,and for paleoclimate reconstruction.It is an important parameter for characterizing aquifer hydrogeology including aquifer storage capacity,the rate of groundwater renewal,and flow velocity.Environmental tracers that are sensitive to residence time have proven to be effective tools for estimating groundwater age.Short-lived radioisotopes such as 3H,85Kr,and 3H/3He can indicate modern recharge,whereas those with long half-lives such as 14C,36Cl,4He,and 81Kr can be used to date old groundwater.