Assessment of Water Provenances in Koxkar Glacier Region at the South Slope of Mt. Tianshan, China

• 作者: Han Haidong Wang Jian Xu Junli Xu Xiaohui
• 来源期刊: 气象与环境研究:英文版
• 学科: 地球科学
• 关键词: WATER PROVENANCE Conductivity Δ^18O THREE-COMPONENT mixing models Koxkar glacier
• 年，卷（期）: 2019,（5）
• 页码范围: 81-86
• 页数: 6页
• 分类号: P

摘要

Various water samples were collected for electrical conductivity (EC) and δ^18O analysis,and the proportion and contribution of atmospheric precipitation,glacier ice and shallow groundwater to discharge in the Koxkar glacier basin at the south slope of the Tianshan Mountains were studied.The results show that glacial ice-water recharge was dominant,accounting for 72.11% of the annual runoff.It also had a significant positive correlation with temperature during the warm season (from May to September).However,glacier ice ablation replenishment still existed when the temperature in the cold season was below the critical temperature of 0 ℃.This could be that the heat generated by the friction between the ice body and the ice bed during the subglacial ice sliding process led ice to melt,what's more,the stored water in the geometric passages inside and below the glacier could slowly release.Groundwater recharge accounted for 16.38% of the total runoff.The supplement was small and its variation range was relatively small in the cold season.But in the warm season,the amount of groundwater recharge increased and changed drastically.It might be that the seasonal frozen soil in the basin was widely developed and was affected by temperature changes.Atmospheric precipitation replenishment only accounted for 11.51%.The daily precipitation recharge river water had a significant response to regional precipitation,but there was hysteresis in time,and there was still precipitation recharge runoff even in the absence of precipitation.