干旱区生态环境知识资源中心(Arid): A method to obtain soil-moisture estimates over bare agricultural fields in arid areas by using multi-angle RADARSAT-2 data

Arid

DOI	10.3724/SP.J.1226.2018.00145
	A method to obtain soil-moisture estimates over bare agricultural fields in arid areas by using multi-angle RADARSAT-2 data
	Wang, JunZhan; Qu, JianJun; Tan, LiHai; Zhang, KeCun
通讯作者	Wang, JZ
来源期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
出版年	2018
卷号	10 期号:2 页码:145-150
英文摘要	Soil moisture is an important parameter for agriculture, meteorological, and hydrological studies. This paper focuses on soil-moisture estimation methodology based on the multi-angle high- and low-incidence-angle mode RADARSAT-2 data obtained over bare agricultural fields in an arid area. Backscattering of the high- and low-incidence angles is simulated by using AIEM (advanced integral equation model), with the surface-roughness estimation model built based on the simulated data. Combining the surface-roughness estimation model with the backscattering model of the low-incidence-angle mode, a soil-moisture estimation method is put forward. First, the natural logarithm (ln) of soil moisture was obtained and then the soil moisture calculated. Soil moisture of the study area in Dunhuang, Gansu Province, was obtained based on this method; a good agreement was observed between the estimated and measured soil moisture. The coefficient of determination was 0.85, and the estimation precision reached 4.02% in root mean square error (RMSE). The results illustrate the high potential of the approach developed and RADARSAT-2 data to monitor soil moisture.
英文关键词	RADARSAT-2 bare soil soil moisture
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000437513900006
WOS关键词	SURFACE-ROUGHNESS ; EMPIRICAL-MODEL ; INVERSION ; IMAGERY ; SAR
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/332875
作者单位	[Wang, JunZhan; Qu, JianJun; Tan, LiHai; Zhang, KeCun] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Dunhuang Gobi & Desert Ecol & Environm Res Stn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wang, JunZhan,Qu, JianJun,Tan, LiHai,et al. A method to obtain soil-moisture estimates over bare agricultural fields in arid areas by using multi-angle RADARSAT-2 data[J],2018,10(2):145-150.
APA	Wang, JunZhan,Qu, JianJun,Tan, LiHai,&Zhang, KeCun.(2018).A method to obtain soil-moisture estimates over bare agricultural fields in arid areas by using multi-angle RADARSAT-2 data.SCIENCES IN COLD AND ARID REGIONS,10(2),145-150.
MLA	Wang, JunZhan,et al."A method to obtain soil-moisture estimates over bare agricultural fields in arid areas by using multi-angle RADARSAT-2 data".SCIENCES IN COLD AND ARID REGIONS 10.2(2018):145-150.