径流分割是应用水文学中的一个基本问题,同位素径流分割则是采用同位素进行分割的方法,其应用范围已从产流理论研究拓展至地下水地表水相互作用、生态水文过程等多个领域.评述了高寒流域同位素径流分割方法原理及其应用研究进展,突出其对全球变化的指示意义.详细介绍了雪融水稳定同位素变化特征机理,以及加权平均值(VWA)、即时值(CMW)及径流校正(RunCE)等误差处理方法及其优缺点.最后,阐述了高寒流域同位素径流分割的应用前景,指出同位素径流分割可以与GIS软件等结合拓宽其研究的空间尺度、与水化学及人工试验等方法相结合拓展其研究手段,可以结合高寒流域独特地形研究山区产流机制. Runoff segmentation is a basic problem in applied hydrology. Isotope runoff segmentation is a method of segmentation using isotopes, and its application range has been extended from the study of runoff theory to the interaction of groundwater surface water and ecological hydrological processes. In this paper, the principle and application of isotope runoff segmentation method in cold and cold watersheds are reviewed, and their significance for global change is highlighted. The characteristics and mechanisms of stable isotope variations in snowmelt water, as well as the weighted average (VWA), immediate value (CMW) and runoff RunCE error correction method and its advantages and disadvantages.Finally, the application prospect of isotope runoff segmentation in the cold and cold watershed is described, and it is pointed out that isotope runoff segmentation can be combined with GIS software to broaden the spatial scale of its research, Methods combined to expand their research tools, can combine the unique terrain of the alpine watershed to study the mountain flow mechanism.