Regimes of Runoff Components on the Debris-covered Koxkar Glacier in Western China

作     者：HAN Hai-dong DING Yong-jian LIU Shi-yin WANG Jian 

作者机构：State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2015年第12卷第2期

页      面：313-329页

核心收录：

学科分类：07[理学] 08[工学] 081501[工学-水文学及水资源] 0705[理学-地理学] 0815[工学-水利工程] 070501[理学-自然地理学] 

基　　金：supported by the Knowledge Innovation Program of the Chinese Academy of Sciences under Grant No. KZCX2-YW-GJ04 National Nature Science Foundation of China (NSFC) under Grant Nos. 41130641 and 41271078 

主　　题：Debris cover Meltwater Glacier Koxkar Runoff 

摘      要：By using a degree-day based distributed hydrological model, regimes of glacial runoff from the Koxkar glacier during 2007-2011 are simulated, and variations and characteristics of major hydrological components are discussed. The results show that the meltwater runoff contributes 67.4%, of the proglacial discharge, out of which snowmelt, clean ice melting, buried-ice ablation and ice-cliff backwasting account for 22.4%, 21.9%, 17.9% and 5.3% of the total melt runoff, respectively. Rainfall runoff is significant in mid-latitude glacierized mountain areas like Tianshan and Karakorum. In the Koxkar glacier catchment, about 11.5% of stream water is initiated from liquid precipitation. Spatial distributions for each glacial runoff component reveal the importance of climatic gradients, local topography and morphology on glacial runoff generation, and temporal variations of these components is closely related to the annual cycle of catchment meteorology and glacier storage. Four stages are recognized in the seasonal variations of glacier storage, reflecting changes in meltwater yields, meteorological conditions and drainage systems in the annual hydrological cycle.