Title: 3-D Electrical Resistivity Tomography to Monitor Root Zone Water Dynamics
Authors: GarrĂ©, Sarah ×
Javaux, Mathieu
Vanderborght, Jan
Pagès, Loic
Vereecken, Harry #
Issue Date: Feb-2011
Publisher: Soil Science Society of America
Series Title: Vadose Zone Journal vol:10 issue:1 pages:412-421
Abstract: Knowledge of soil moisture dynamics and its spatial variability is essential to improve our understanding of root water uptake and soil moisture redistribution at the local scale and the field scale. We investigated the potential and limitations of Electrical Resistivity Tomography (ERT) to measure 3-D soil moisture changes and variability in a large, undisturbed, cropped soil column and examined the interactions between soil and root system. Our analysis sustained the value of ERT as a tool to monitor and quantify water contents and water content changes in the soil, as long as the root biomass does not influence the observed resistivity. This is shown using a global water mass balance and a local validation using Time Domain Reflectrometry (TDR) probes. The observed soil moisture variability was rather high as compared to values reported in the literature for bare soil. The measured water depletion rate, being the result of combined effects of root water uptake and soil water redistribution, was compared with the evaporative demand and root length densities. We could observe a gradual downward movement of the maximum water depletion rate combined with periods of redistribution when there was less transpiration. Finally, the maximum root length density was observed at -70 cm depth, pointing out that root architecture can strongly depend on soil characteristics and states.
ISSN: 1539-1663
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science