An impedance based approach to determine soil moisture using radarsat-2 data

In the present paper an attempt has been made for estimation of volumetric moisture of bare soil surface at particular thickness of soil layer by applying impedance based model relied on transmission line theory. The proposed approach calculates the impedance of layer of bare soil surface as a function of complex dielectric constant and thickness of soil. After retrieval of complex dielectric constant at 5cm thickness of soil layer using Genetic algorithm (GA) approach, volumetric moisture of bare soil surface is retrieved by using polynomial relationship proposed by Topp et al. The proposed method is effectively applied on radarsat-2 data. Obtained soil moisture values show consistency with the soil moisture values retrieved by Dubois model and ASCAT SSM data.