中文摘要：

雪和冰的学习融化(SIM ) 在为对水供应和质量的评价的水少见的干旱区域是重要的。因为没有连续地在 hydrostations 测量 SIM 的直接方法，这些研究包含唯一的困难，特别在水疗院模型的刻度。递归的数字过滤器(RDF ) 和同位素的 hydro-geochemical 方法(IHM ) 被联合在西北的中国把 SIM 与高山的流速及流水量的八个观察系列分开。校准的方法的确认在空间和时间与公平精确性建议了 SIM 特征的好俘获。在 Hei 河盆(HRB ) 的上面的活动范围的联合方法的应用建议到为多部件的流速及流水量的 SIM 部分的一条双山峰曲线再装(宏) 河，当一条单个山峰曲线被建议为时降雨主导再装(RDR ) 河。分离的给定的内部年度的统计，自从 1960 年代，高山的河的两种类型经历了 SIM 的明显的减少。在过去的 10 年里，在河的二种类型的 SIM 升起了到 1970 年代的层次，但是仍然保持比 1960 年代的水平低。学习提供了一条可观的证据确定高山的 SIM 基于在计量器的观察数据系列的分离驻扎。联合方法的申请能在在高山的区域的 SIM 相关的水疗院模型的刻度和确认是有用的。

英文摘要：

The study of snow and ice melt （SIM） is important in water-scarce arid regions for the assessment of water supply and quality. These studies involve unique difficulties, especially in the calibration of hydro-models because there is no direct way to continuously measure the SIM at hydrostations. The recursive digital filter （RDF） and the isotopic hydro-geochemical method （IHM） were coupled to separate the SIM from eight observed series of alpine streamflows in northwestern China. Validation of the calibrated methods suggested a good capture of the SIM characteristics with fair accuracy in both space and time. Applications of the coupled methods in the upper reaches of the Hei River Basin （HRB） suggested a double peak curve of the SIM fraction to streamflow for the multi-component recharged （MCR） rivers, while a single peak curve was suggested for the rainfall-dominant recharged （RDR） rivers. Given inter-annual statistics of the separation, both types of the alpine rivers have experienced an obvious decrease of SIM since 196os. In the past 10 years, the SIM in the two types of rivers has risen to the levels of the 1970s, but has remained lower than the level of the 1960s. The study provided a considerable evidence to quantify the alpine SIMbased on the separation of observed data series at gauge stations. Application of the coupled method could be helpful in the calibration and validation of SIM-related hydro-models in alpine regions.