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

	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
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	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6228010
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335943
作者单位	Wang Junzhan, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Dunhuang Gobi and Desert Ecology and Environment Research Station, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Qu Jianjun, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Dunhuang Gobi and Desert Ecology and Environment Research Station, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Tan Lihai, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Dunhuang Gobi and Desert Ecology and Environment Research Station, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Zhang Kecun, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Dunhuang Gobi and Desert Ecology and Environment Research Station, Chinese Academy of Sciences, Lanzhou, Gansu 730000, 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.