The Development and Application of Isotopes in Hydrological Geology Research
///This paper summarizes the previous research achievements and acts on the detail projects, and order with practical examples, to comprehensively concludes the development and achievements of hydrogeology isotopes various form theory, experiment methods and the analysis of test means in recent 20 years. While looking out of the international situation, the paper points out the absences, responsibilities, pressure and challenges to encounter. The conclusion can give guidance for later work.