中国科学院青藏高原研究所机构知识库
Advanced  
ITPCAS OpenIR  > 图书馆  > 期刊论文
学科主题: 地理学::自然地理学
题名: River recharge sources and the partitioning of catchment evapotranspiration fluxes as revealed by stable isotope signals in a typical high-elevation arid catchment
作者: Guo, XY (Guo, Xiaoyu)1, 2, 4; Tian, LD (Tian, Lide)1, 2, 3, 4; Wang, L (Wang, Lei)1, 2; Yu, WS (Yu, Wusheng)1, 2; Qu, DM (Qu, Dongmei)1
通讯作者: Tian, LD
关键词: TIBETAN PLATEAU ; WATER-BALANCE ; SOIL EVAPORATION ; CLIMATE-CHANGE ; OXYGEN ISOTOPES ; SISPAT-ISOTOPE ; ASIAN MONSOON ; MASS-BALANCE ; TIME-SERIES ; PRECIPITATION
刊名: JOURNAL OF HYDROLOGY
发表日期: 2017
DOI: 10.1016/j.jhydrol.2017.04.037
卷: 549, 期:0, 页:616-630
收录类别: SCI
合作性质: 国内
文章类型: Article
类目[WOS]: Engineering, Civil; Geosciences, Multidisciplinary; Water Resources ; Engineering; Geology; Water Resources
研究领域[WOS]: Engineering; Geology; Water Resources
英文摘要: Catchment-scale hydrological cycles are expected to suffer more extremes under a background of climate change. Quantifying hydrological changes in high and remote areas is practically challenging. However, stable isotopes in river water can be seen to vary, dependent upon the combined influence exerted by recharge sources and local climatic conditions; the study of river water stable isotopes can therefore provide a meaningful method for delineating catchment-scale hydrological studies. In this study, we present high-resolution time series of river delta C-18 and d-excess values; additionally, we identify the seasonal dynamics of river recharge sources and major components of the catchment-scale water balance, together with precipitation and groundwater isotopes, and concurrent meteorological data recorded in Magazangbu catchment on the northwestern Tibetan Plateau (TP). Using isotopic analysis, and within a proportional framework, we partitioned the isotopic fractionation (El) or non-fractionation (E2) from soil evaporation fluxes (E-soil) apparent in different processes, using NDVI (Normal Differential Vegetation Index) data collected by MODIS satellites to calculate the vegetation fractional coverage (VFC), and Global Land Data Assimilation System (GLDAS) records to determine evapotranspiration data (ET). Finally, the contributions made by each ET component (E-soil and plant transpiration) to total catchment ET were computed for the high and remote northwestern TP. Our results show that: (1) river 8180 values were high in summer and low in winter, while d-excess values displayed a contrary seasonal cycle; (2) for the monsoon period, precipitation contributed 60.6% to Magazangbu catchment runoff. Deeper groundwater was the main water source for the winter low base flow, and shallow groundwater or high elevation snowmelt was the principal component of the spring thaw and autumn freezing periods; and (3) a substantial proportion of E-soil (96.4% annually; 92.2% during monsoon) was consumed without isotopic fractionation (E2); plant transpiration (T) constituted less than half of total ET (41% annually, 29% during monsoon) in Magazangbu catchment. This calculation of river recharge sources and partitioning of catchment ET components using isotopic signals and MODIS NDVI data or GLDAS ET data provide new methods for hydrological studies in high and remote areas. These results provide important catchment-scale water-balance information which is very useful to climate models conducted in a high-elevation arid environment. (C) 2017 Elsevier B.V. All rights reserved.
语种: 英语
WOS记录号: WOS:000403855500049
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/8202
Appears in Collections:图书馆_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
V.549 616-630 2017.pdf(2488KB)期刊论文作者接受稿开放获取View 联系获取全文

作者单位: 1.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China.
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
3.Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650500, Peoples R China.
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China.

Recommended Citation:
Guo, XY ,Tian, LD ,Wang, L ,et al. River recharge sources and the partitioning of catchment evapotranspiration fluxes as revealed by stable isotope signals in a typical high-elevation arid catchment[J]. JOURNAL OF HYDROLOGY,2017,549(0):616-630.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Guo, XY (Guo, Xiaoyu)]'s Articles
[Tian, LD (Tian, Lide)]'s Articles
[Wang, L (Wang, Lei)]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Guo, XY (Guo, Xiaoyu)]‘s Articles
[Tian, LD (Tian, Lide)]‘s Articles
[Wang, L (Wang, Lei)]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: V.549 616-630 2017.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

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

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院青藏高原研究所 - Feedback
Powered by CSpace