Evaluating the surface temperature and vegetation index (Ts/VI) method for estimating surface soil moisture in heterogeneous regions

doi:10.2166/nh.2017.079

	Evaluating the surface temperature and vegetation index (Ts/VI) method for estimating surface soil moisture in heterogeneous regions
	Liu, Zhaofei; Yao, Zhijun; Wang, Rui
刊名	HYDROLOGY RESEARCH
	2018-06-01
卷号	49 期号:3 页码:689-699
关键词	MODIS Qinghai-Tibetan Plateau remote sensing retrieval surface soil moisture surface temperature temperature vegetation dryness index
ISSN号	0029-1277
DOI	10.2166/nh.2017.079
通讯作者	Yao, Zhijun(yaozj@igsnrr.ac.cn)
英文摘要	The surface temperature and vegetation index (Ts/VI) method is a remote sensing-based quantitative approach. It is widely used for estimating the evapotranspiration, evaporative fraction, and surface soil moisture (SSM). However, this method can only be used in flat regions. In this study, we investigated the effect of altitude when using the Ts/VI method for estimating the SSM in heterogeneous regions. The results showed that the temperature vegetation dryness index (TVDI) method performed poorly at estimating the SSM in the source region of the Yangtze River; there was a weak correlation with the observed SSM, and R-2 was only 0.167. However, the performance of the method improved considerably when the effects of both altitude and frozen soil were considered; the TVDI had a strong correlation with the observed SSM, and R-2 improved to 0.617. In the study area, the effects of altitude on the TVDI values were greater than those of the frozen soil. In general, the Ts/VI method can obtain satisfactory results in mountainous regions if the effects of both the altitude and frozen soil are considered.
资助项目	National Natural Science Foundation of China[41571027] ; National Natural Science Foundation of China[41371058] ; National Natural Science Foundation of China[41190080]
WOS关键词	TRIANGLE METHOD ; SPACE ; EVAPOTRANSPIRATION ; RETRIEVAL ; ALGORITHM ; DROUGHT
WOS研究方向	Water Resources
语种	英语
出版者	IWA PUBLISHING
WOS记录号	WOS:000452409900007
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/51369]
专题	中国科学院地理科学与资源研究所
通讯作者	Yao, Zhijun
作者单位	Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Liu, Zhaofei,Yao, Zhijun,Wang, Rui. Evaluating the surface temperature and vegetation index (Ts/VI) method for estimating surface soil moisture in heterogeneous regions[J]. HYDROLOGY RESEARCH,2018,49(3):689-699.
APA	Liu, Zhaofei,Yao, Zhijun,&Wang, Rui.(2018).Evaluating the surface temperature and vegetation index (Ts/VI) method for estimating surface soil moisture in heterogeneous regions.HYDROLOGY RESEARCH,49(3),689-699.
MLA	Liu, Zhaofei,et al."Evaluating the surface temperature and vegetation index (Ts/VI) method for estimating surface soil moisture in heterogeneous regions".HYDROLOGY RESEARCH 49.3(2018):689-699.