Research on Inversion of Soil Moisture in Karst Area Based on Full-Polarization SAR Data

In order to select a reasonable controlling mode of rocky desertification and restrain the development of rocky desertification with local conditions, the soil moisture in Karst area was studied by using full-polarization Synthetic Aperture Radar (SAR) data in this paper. Based on the decisive role...

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Bibliographic Details
Published inIEEE access Vol. 9; pp. 117512 - 117519
Main Authors Su, Caixia, Cao, Yongfeng
Format Journal Article
LanguageEnglish
Published Piscataway IEEE 2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Backscatter
Biological system modeling
Desertification
Full-polarization SAR
Indexes
Integral equations
Karst
Karst area
Land use
Landforms
Mathematical model
Polarization
rocky desertification degree
Soil conditions
Soil moisture
Synthetic aperture radar
Technical services
Vegetation
Vegetation mapping
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Summary:In order to select a reasonable controlling mode of rocky desertification and restrain the development of rocky desertification with local conditions, the soil moisture in Karst area was studied by using full-polarization Synthetic Aperture Radar (SAR) data in this paper. Based on the decisive role of rocky desertification degree, vegetation, slope and characteristic of the soil, different models were employed to invert the soil moisture in different rocky desertification degree areas according to their land use type and vegetation as follows: (1) The advanced integral equation model (AIEM) was employed in the intensive rocky desertification and serious rocky desertification areas. (2) The water-cloud model (WCM) coupled with AIEM was employed in the slight rocky desertification and moderate rocky desertification areas. (3) The Michigan microwave canopy scattering (MIMICS) model coupled with AIEM was employed in the non-rocky desertification and potential rocky desertification areas. As a result, the soil moisture was inverted successfully in the whole study area with the total inversion accuracy of 84.37% and RMSE of 2.10. This result demonstrates that the proposed method can invert the soil moisture accurately and provide a powerful technical support for inverting the soil moisture in the Karst area with large span, fluctuating landform and diverse vegetation.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3106768