干旱区生态环境知识资源中心(Arid): High-Resolution Inversion Method for the Snow Water Equivalent Based on the GF-3 Satellite and Optimized EQeau Model

Arid

DOI	10.3390/rs14194931
	High-Resolution Inversion Method for the Snow Water Equivalent Based on the GF-3 Satellite and Optimized EQeau Model
	Yang, Yichen; Fang, Shifeng; Wu, Hua; Du, Jiaqiang; Wang, Xiaohu; Chen, Rensheng; Liu, Yongqiang; Wang, Hao
通讯作者	Fang, SF
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2022
卷号	14 期号:19
英文摘要	High-resolution snow water equivalent studies are important for obtaining a clear picture of the potential of water resources in arid areas, and SAR-based sensors can achieve meter-level snow water equivalent inversion. The advanced C-band SAR satellite Gaofen-3 (GF-3) can now achieve meter-level observations of the same area within one day and has great potential for the inversion of the snow water equivalent. The EQeau model is an empirical method for snow water equivalent inversion using C-band SAR satellites, but the model has major accuracy problems. In this paper, the EQeau model is improved by using classification of underlying surface types and polarization decomposition, and the inversion of the snow water equivalent was also completed using the new data source GF-3 input model. The results found that: (1) the classification of underlying surface types can significantly improve the fit between the snow thermal resistance and the backscattering coefficient ratio; (2) the accuracy of the snow density extracted by the GF-3 satellite using the Singh-Cloude Three-Component Hybrid (S3H) decomposition is better than IDW spatial interpolation, and the overall RMSE can reach 0.005 g/cm(3); (3) the accuracy of the optimized EQeau model is significantly improved, and the overall MRE is reduced from 27.4% to 10.3%. Compared with the original model, the optimized model is superior both in terms of verification accuracy and image detail. In the future, with the combination of advanced technologies such as the Internet of Things (IoT), long, gapless, all-weather, and high-resolution snow water equivalent inversion can be achieved, which is conducive to the realization of all-weather monitoring of the regional snow water equivalent.
英文关键词	snow water equivalent GF-3 the EQeau model S3H polarization decomposition
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000867181100001
WOS关键词	SPATIOTEMPORAL VARIABILITY ; RADAR INTERFEROMETRY ; SPATIAL-DISTRIBUTION ; SAR DATA ; DYNAMICS ; DENSITY ; RUNOFF ; COVER ; DEPTH
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394207
推荐引用方式 GB/T 7714	Yang, Yichen,Fang, Shifeng,Wu, Hua,et al. High-Resolution Inversion Method for the Snow Water Equivalent Based on the GF-3 Satellite and Optimized EQeau Model[J],2022,14(19).
APA	Yang, Yichen.,Fang, Shifeng.,Wu, Hua.,Du, Jiaqiang.,Wang, Xiaohu.,...&Wang, Hao.(2022).High-Resolution Inversion Method for the Snow Water Equivalent Based on the GF-3 Satellite and Optimized EQeau Model.REMOTE SENSING,14(19).
MLA	Yang, Yichen,et al."High-Resolution Inversion Method for the Snow Water Equivalent Based on the GF-3 Satellite and Optimized EQeau Model".REMOTE SENSING 14.19(2022).