研究目的
To study the potential of synthetic aperture radar (SAR) for mapping and monitoring of the spatio-temporal dynamics of soil salinity using interferometry.
研究成果
The study concludes that SAR, particularly InSAR coherence, can be used to estimate temporal changes in soil salinity, with sensitivity varying by polarization and incidence angle. Optimal configurations for detection were identified for both study sites.
研究不足
The study acknowledges the influence of other biophysical parameters (roughness, moisture, etc.) on the SAR signal and the need for future research to quantify these factors more accurately.
1：Experimental Design and Method Selection:
The study used interferometric coherence as a technique for detecting changes of soil surface characteristics and correlated those changes with variation in soil salinity.
2：Sample Selection and Data Sources:
Two sites were selected for experimental validation: the region of Mahdia (central Tunisia) and the plain of Tadla (central Morocco). Both sites underwent three ground campaigns simultaneously with three Radarsat-2 SAR image acquisitions.
3：List of Experimental Equipment and Materials:
Radarsat2 satellite images acquired in 'Fine Quad Pol' mode were used.
4：Experimental Procedures and Operational Workflow:
Soil samples were collected during three field campaigns, and SAR images were processed to generate coherence images for each polarization (HH/HV/VV).
5：Data Analysis Methods:
Simple linear regression models were used to relate variation in EC to interferometric coherence.
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