青藏高原东南部冻土区夏季降水及河水氢氧同位素的变化特征  

Variation characteristics of hydrogen and oxygen isotopes of precipitation and river water during summer in permafrost region of southeastern Qinghai Tibet Plateau

作　　者：李恺 衣鹏 应可均 熊岭 李敏娟[1] LI Kai;YI Peng;YING Ke-jun;XIONG Ling;LI Min-juan(College of Hydrology and Water Resources/State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水文水资源学院/水文水资源与水利工程国家重点实验室,南京210098

出　　处：《湖北农业科学》2022年第8期49-55,共7页Hubei Agricultural Sciences

基　　金：国家自然科学基金资助项目(51979072)。

摘　　要：基于青藏高原2019年7月31日至2019年8月10日采集的5个降水样品、25个河水样品、1个湖水样品,结合气象资料,进行青藏高原东南部冻土区冻融期夏季降水和河水同位素方法与海拔、降水量、气温相关关系分析,同时采用克里金插值分析了δ18O和δD的空间分布特征。结果表明,夏季河水水量受气温影响显著,冻土融化水与河水交互作用更加密切,表明土壤冻融过程在多年冻土区径流过程中起到重要影响。Based on five precipitation samples,25 river water samples and one lake water sample collected from July 31,2019 to Au⁃gust 10,2019,combined with meteorological data,the relationship between summer precipitation and river water isotope method and altitude,precipitation and temperature in the frozen thaw period in the southeast of Qinghai Tibet Plateau was analyzed.Meanwhile,the spatial distribution characteristics ofδ18O andδD were analyzed by Kriging interpolation.The results showed that the river water volume was significantly affected by temperature in summer,and the interaction between thawed water and river water was more close,indicating that the soil freezing-thawing process played an important role in the runoff process in permafrost region.

关 键 词：青藏高原 东南部冻土区 降水 河水 氢氧同位素 

分 类 号：P642.14[天文地球—工程地质学] P597.2[天文地球—地质矿产勘探]