Co-Authors:
Dasberg, S., Second author Hydrologic Science, Dept Land, Air and Water Resources, Univ of California, Davis, CA 95616, USA
Hopmans, J.W., Second author Hydrologic Science, Dept Land, Air and Water Resources, Univ of California, Davis, CA 95616, USA
Abstract:
This study was initiated by time domain reflectometry (TDR) for two soil types in uniform and layered profiles. Measurements were taken in the laboratory for a Hanford sandy loam (coarse-loamy), (Typic Xerorthent) and a Yolo clay loam (Typic Xerothent) soil, using a two-rod parallel with pulse transformer and a three-rod coaxial probe. The TDR data of both soils were successfully fitted to a four-component mixing model that includes bound and free water, the solid and gas phases. The presence of a wet layer above dry soil may cause difficulties in signal interpretation. -from Authors