中文摘要：

通过对三屯河流域40多组环境同位素样品的分析研究，得出了山区、冲洪积扇、细土平原区地表水、地下水环境同位素组成分布特征，并在此基础上讨论了研究区地下水的来源、混合比例，同时运用稳定同位素的高程效应计算了地下水补给区的高程，最后讨论了流域水循环的过程，为该区的水资源评价和水资源保护奠定了基础。

英文摘要：

Based on analysis and studies on environmental isotope samples over 40 groups in the drainage area of Santun River, the article achieved isotope composition and distribution characters of surface and underground water environment in the mountain area, the alluvium and diluvium area and the fine-soil plain. Under this condition, it discusses sources and mixture ratio of groundwater in those studied areas and calculates the altitude in the recharged area of groundwater by altitudinal effect of stable isotope. At last, it discusses the process of water circle in the drainage area and sets a solid foundation for evaluation and protection of local water resources.