EGU21-3985, updated on 04 Mar 2021
https://doi.org/10.5194/egusphere-egu21-3985
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Measurement of soil hydraulic properties of structured and repacked soils

Urša Pečan, Luka Žvokelj, Jure Ferlin, Vesna Zupanc, and Marina Pintar
Urša Pečan et al.
  • University of Ljubljana, Biotechnical faculty, Department of Agronomy, Ljubljana, Slovenia (ursa.pecan@bf.uni-lj.si)

Soil hydraulic properties provide important information about soil behavior under unsaturated and saturated conditions. Often sampling of undisturbed soils is not possible and soil samples have to be repacked for laboratory analysis. The HYPROP® measuring system (METERgroup, Munich, Germany) is a convenient method for determination of soil water retention characteristics and unsaturated hydraulic conductivity of undisturbed soil samples. It measures the matric potential of the saturated and drying soil sample using two tensiometers placed at different depths. Although the tensiometers are based on a new design that theoretically withstands cavitation at higher tension values, they are still considered to operate in the low tension range. Since soil water retention properties in the low tension range are strongly influenced by soil structure and pore size distribution, we were interested in the changes in hydraulic properties when measured on disturbed and then repacked samples, and undisturbed soil samples. Therefore, we investigated the soil hydraulic properties of three different soil types using the evaporation method on undisturbed and repacked samples. The results provide important insights for the interpretation of the results when the collection of undisturbed samples is not possible, and for designing laboratory experiments with repacked soils.

How to cite: Pečan, U., Žvokelj, L., Ferlin, J., Zupanc, V., and Pintar, M.: Measurement of soil hydraulic properties of structured and repacked soils, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3985, https://doi.org/10.5194/egusphere-egu21-3985, 2021.

Display materials

Display file

Comments on the display material

to access the discussion