As a result, the appearance of a given ice layer in radar images differs significantly in wet conditions, as compared to dry conditions [10]. In the observation of river ice, the backscatter energy is governed by the interaction of microwaves with four components—water, ice, snow, and air—through two general mechanisms: surface and volume scattering. Surface scattering involves the reflection of microwaves at the interface with target components, while volume scattered radar signals penetrate the surface and then are scattered due to impurities within the ice volume. Surface scattering is often observed in either specular or diffuse reflection, depending on surface roughness.