Effect of Salinity on the Dielectric Properties of Geological Materials: Implication for Soil Moisture Detection by Means of Radar Remote Sensing

Abstract

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The use of remote sensing in soil and terrain mapping — A review

“…Using inverse modelling, the imaginary part can be calculated and calibrated with soil salinity (Bell et al, 2001;Taylor et al, 1996;Yun et al, 2003). Soil salinity classes have been successfully derived on a local scale (b500 km 2 ) with the C-, P-, and L-bands of airborne and spaceborne radar systems; best results are obtained using L-band data because long wavelengths penetrate soil and vegetation to a greater extent than higher frequencies (Bell et al, 2001;Lasne et al, 2008;Taylor et al, 1996).…”

Combining ALOS and ERS-2 SAR data for the characterization of tidal flats. Case study from the Baie des Veys, Normandy, France

“…VV-polarization at high incidence angle behaves much like those of lower incidence angles (Gade et al, 2008). VV-polarization provides also a greater sensitivity than HH-polarization to salinity (Lasne et al, 2008). Since the mean (RMS) height of ripples on tidal flats is very small, single scattering dominates over multiple scattering in most cases.…”

“…The high conductivity of sea water causes the penetration depth to be very small (Bell et al, 2001;Lasne et al, 2008). Thus, the sediment can be considered homogeneous without significant dielectrical discontinuities.…”

Review and Assessment of Electromagnetic Wave Propagation in Sand and Dust Storms at Microwave and Millimeter Wave Bands --- Part I

“…At this stage of development, it is obvious that sufficient interest was shown to knowledge of dielectric constants, and it was noted that the dielectric constant, though dependent on frequency, is not sensitive to frequency above 4 GHz [20,32]. At frequencies up to 18 GHz, [15] evaluated the MW dielectric behaviour of soil-water mixtures and presented a semi empirical mixing model based upon the index of refraction as a function of water content and soil textural composition.…”