The hemas-microsoft-com:office:smarttags" />basin of Heihe River is located in arid area of inland China. The surface water and groundwater in different landscape units has occurred a large number, regular and duplicate transformation process, which has greatly improved the utilization of water resources. Since the beginning of this century, as survey theory has been enriched and environmental isotope techniques has been widely utilized, loop transformation of surface water and groundwater resources in Heihe River basin is widely paid attention to in the academic community, and a number of high level academic results have been completed and published, and all these work make the water resources development and protection in the arid area to move forward a single step. hemas-microsoft-com:office:office" />