气候变化领域集成服务门户(CCPortal): An Improved Model for Estimating the Dielectric Constant of Saline Soil in C-Band

CCPortal

DOI	10.1109/LGRS.2021.3085594
	An Improved Model for Estimating the Dielectric Constant of Saline Soil in C-Band
	Dong, Leilei; Wang, Weizhen; Xu, Feinan; Wu, Yueru
通讯作者	Wang, WZ (通讯作者)，Chinese Acad Sci, Key Lab Remote Sensing Gansu Prov, Heihe Remote Sensing Expt Res Stn, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	1545-598X
EISSN	1558-0571
卷号	19
英文摘要	Soil salinization is one of the major forms of land degradation processes from all over the world. The dielectric constant plays an important role in the process of soil salinity retrieval by using microwave remote sensing. The Dobson model has been widely used to simulate the dielectric constant of nonsaline soil, but the estimated result of the Dobson model did not perform well for saline soil. Moreover, the ions' concentration is related to soil salinity, and the electrical conductance is a critical factor that influences the imaginary part of the dielectric constant. Therefore, the relationship between them needs to further explore. In addition, saturation is neglected in the current dielectric model of saline soil. In this letter, the relationship between the electrical conductance and ions' concentration was analyzed based on the experimental data. The saturation as a new parameter was introduced into the Dobson model to improve the estimated accuracy of the dielectric constant of saline soil in the C-band. The comparison between the revised model, the Dobson model, the Hu Qingrong (HQR) model, and the Wu Yueru (WYR) model was presented. The results indicate that there is a significant linear relationship between the electrical conductance and ions' concentration, with R-2 of 0.996, a slope of 0.1456, and an intercept of 0.0252. Once the new parameter is implemented, the improved dielectric model based on the C-band reproduces the dielectric constant of saline soil satisfactorily in each soil sample. The simulated results of the improved model are consistent with the laboratory measurement results, with an RMSE of 0.97 and R-2 of 0.953. Compared with other commonly used three dielectric models of the saline soil, the improved dielectric model performs well in simulating the imaginary part of the dielectric constant. The improved agreements between the simulations and the measurements indicate that the revised dielectric model is appropriate for simulating the dielectric constant of saline soil. The revised dielectric model of saline soil will provide a scientific foundation for the soil salinity retrieval from the microwave remote sensing technology.
关键词	WATER
英文关键词	An improved model; C-band; dielectric constant; saline soil; saturation
语种	英语
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
WOS类目	Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000730789400071
来源期刊	IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253964
作者单位	[Dong, Leilei; Wang, Weizhen; Xu, Feinan] Chinese Acad Sci, Key Lab Remote Sensing Gansu Prov, Heihe Remote Sensing Expt Res Stn, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; [Dong, Leilei] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; [Wang, Weizhen] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Peoples R China; [Wu, Yueru] Inner Mongolia Agr Univ, Coll Desert Control Sci & Engn, Hohhot 010018, Peoples R China
推荐引用方式 GB/T 7714	Dong, Leilei,Wang, Weizhen,Xu, Feinan,et al. An Improved Model for Estimating the Dielectric Constant of Saline Soil in C-Band[J]. 中国科学院西北生态环境资源研究院,2022,19.
APA	Dong, Leilei,Wang, Weizhen,Xu, Feinan,&Wu, Yueru.(2022).An Improved Model for Estimating the Dielectric Constant of Saline Soil in C-Band.IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,19.
MLA	Dong, Leilei,et al."An Improved Model for Estimating the Dielectric Constant of Saline Soil in C-Band".IEEE GEOSCIENCE AND REMOTE SENSING LETTERS 19(2022).