位于祁连山东段的石羊河上游，是季风与非季风、干旱与半干旱交界区，气候系统复杂，下垫面介质多样，上游水资源形势对中下游生产生活和生态环境影响剧烈。研究拟以石羊河上游宁缠河流域为研究对象，收集流域内冰雪融水、大气降水、径流和地下水样品，通过实验分析，以径流分割（基于稳定同位素和可溶性离子的三水源径流分割模型）和典型溶质(溶解硅：Si；溶解有机碳：DOC)示踪为基本研究手段，开展如下工作：(1)探寻不同水体稳定同位素和化学示踪剂时空分布规律及动态变化过程；(2)分析混合径流的来源及动态变化；(3)识别降雨在汇流过程流经的路径及沿途发生的迁移转化过程，尤其注重分析降水汇流区的冻土类型和冻土消融过程对降雨径流过程的影响。研究有助于提高对复杂气候系统作用高寒流域径流补给和汇流过程的认识程度，可为开发和改进分布式水文模型汇流和融冰(雪)模块提供物理依据，也可为下游绿洲区水资源管制和合理利用提供科学依据。

Shiayang River upstream is located in the eastern of Qilian Mountain. It is the junction region of the monsoon and non-monsoon area, as well as the arid and semi-arid area. There are vary on the underlying surface. The water resource at the upstream has significant impact on the production and living as well as the ecologic environment in the middle and downstream area. We selected the upstream of Shiyang river as the study area, melt water, precipitation, runoff and groundwater were collected and analyzed based on the methods of runoff separation (Three water runoff separation model) and typical solute tracer(Si, DOC). The following work has to be done: (1) To study the stable isotopic and typical solute tracer characteristic in different water bodies, and to reveal the temporal and spatial variation patterns of stable isotopes and typical solute tracer. (2) To analyze the origin and dynamic change of the mixture runoff. (3) To identify the impact mechanism of the difference among hydrological underlying surface at the different landscape on runoff processes. Especially the types of frozen soil in the confluence area were analyzed, and the influence of the frozen soil melting on the rainfall runoff process. The project can make contributions to improve the knowledge of the effects of the complex climate system on temporal and spatial variation of the runoff supply, to provide a physical basis for the development and improvement of distributed hydrological model and provide scientific basis for the rational use of water resources and protection of ecosystem in the arid oasis area.