Ground-penetrating radar (GPR) with a suspended 1 GHz monostatic horn antenna was deployed in the field for measurement of near-surface soil water contents Θv over bare soils of textures raging from sands to clays, and with different subsurface layering schemes. GPR waveform data used in Serbin and Or (2003) for surface reflection magnitude (SR) and propagation time (PT) Θv estimates were analyzed using techniques from Lambot et al. (2004) to extract Θv(z) at improved depth resolutions. GPR data were compared and calibrated against gravimetric measurements of Θv, TDR estimates of bulk soil dielectric permittivity %epsilon;b(z and electrical conductivity σ, and soil temperature T(z). This method improves the applicability of GPR with a suspended horn antenna for agricultural applications by allowing it to map not only surface skin Θv derived from SR but also that of the root zone Θv(z) data.
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See more of S01 Soil Physics
See more of The ASA-CSSA-SSSA International Annual Meetings (November 6-10, 2005)