IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Alternative TitleComposition of hydrogen and oxygen stable isotopes in seasonal river in permafrost watershed of Yangtze River headwater region
刘光生1; 王根绪2; 高洋2; 赵超1
Corresponding Author刘光生
Source Publication生态学杂志
Other Abstract



Frozen soil plays a key role in hydrological processes and their observations are rare and difficult in permafrost regions. The stable hydrogen and oxygen isotope methods provide a useful tool for permafrost hydrology research. In this study, stable hydrogen and oxygen isotopes composition in seasonal river water was analyzed based on the stable isotope ratios (8D and delta~(18)O) data in precipitation and river water in a permafrost watershed in Yangtze River headwater region in 2009, combined with meteorological and hydrological data. The results showed that the delta~(18)O, 8D and the excess deuterium variation of river water and rainfall all presented descending trends during research period. This implies that the precipitation is the most important source of river water. The 8D in river water in the 2nd and 3rd sub-basin were -66.8%o and -69.6%o, respectively ,which were similar to the 8D in precipitation (-66.7%o). However, the 8D in river water in the 5th sub-basin (62.4%o) was significantly higher than that in precipitation. Higher vegetation coverage in the 5th sub-basin,higher soil organic matter content,soil moisture and actual evapotranspiration and strong evaporation fractionation effect enriched river water in the 5 th sub-basin with heavy isotopes. In June,as the soil melt down,frozen soil water of heavy isotope (8D, -71.3%。) was displaced by precipitation (deltaD, -12.1%o) and then fed the river water. In October, the frozen soil inhibited precipitation infiltration and made hydrogen isotope change quickly with precipitation. These indicate that the freeze-thaw cycle plays an important role in runoff processes in the permafrost regions. This study provides isotopic evidence in hydrological cycle research and a theoretical support of water resource protection in permafrost regions.

Keyword长江源 河水 多年冻土 氢、氧同位素 冻融过程
Subject AreaP342
Indexed ByCSCD ; 北大中文核心
Funding Organization国家自然科学基金项目(40925002) ; 厦门理工学院高层次人才引进项目(YKJ12018R) ; 厦门市科技计划项目(3502Z20130039)
Citation statistics
Document Type期刊论文
Recommended Citation
GB/T 7714
刘光生,王根绪,高洋,等. 长江源多年冻土区季节性河流氢、氧同位素组成[J]. 生态学杂志,2015,34(6):1622-1629.
APA 刘光生,王根绪,高洋,&赵超.(2015).长江源多年冻土区季节性河流氢、氧同位素组成.生态学杂志,34(6),1622-1629.
MLA 刘光生,et al."长江源多年冻土区季节性河流氢、氧同位素组成".生态学杂志 34.6(2015):1622-1629.
Files in This Item:
File Name/Size DocType Version Access License
长江源多年冻土区季节性河流氢_氧同位素组(910KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[刘光生]'s Articles
[王根绪]'s Articles
[高洋]'s Articles
Baidu academic
Similar articles in Baidu academic
[刘光生]'s Articles
[王根绪]'s Articles
[高洋]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[刘光生]'s Articles
[王根绪]'s Articles
[高洋]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 长江源多年冻土区季节性河流氢_氧同位素组成_刘光生.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.