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Empowering Agricultural Knowledge and Technology

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Empowering Agricultural Knowledge and Technology

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Empowering Agricultural Knowledge and Technology

Butuh alat penelitian?  Klik  Produk Labodia

Empowering Agricultural Knowledge and Technology

Empowering Agricultural Knowledge and Technology

Butuh alat?  Klik Produk Labodia

hydraulic conductivity

Determination of the hydraulic conductivity function of grey Vertosol with soil column test

Rajitha Shehan Udukumburage *, Chaminda Gallage, Les Dawes, Yilin Gui
Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD, Australia

ABSTRACT

Expansive soils exhibit swell-shrink behavior in wet-dry periods resulting in distresses on light-weight structures founded on/in them.

Therefore, it is essential to investigate the climate-ground interaction when designing structures on expansive soils.

Laboratory-based models are preferred to investigate the climatic-ground interaction of expansive soils due to the uncontrollability of the boundary conditions and expenses associated with field monitoring.

More flexibility in analyzing the climatic-induced hydraulic responses in expansive soils can be achieved by finite element modeling of data from physical model tests.

However, these laboratory-based models regularly encounter the effects of boundary flaws, preferential flow paths, and entrapped air that needs to be accounted for when numerically simulated.

In this study, the authors aim to numerically model the hydraulic responses in an instrumented Vertosol soil column (ISC) under controlled laboratory conditions.

The effects of the preferential flow paths and boundary flaws were incorporated into a modified hydraulic conductivity as a practical approach to model the hydraulic responses in ISC.

The influence of the entrapped air was rectified by a suitable correction factor.

These findings present a practical method for geotechnical practitioners to accurately estimate the suction and volumetric water content profiles in laboratory-based expansive soil model tests.

Keywords:
Civil engineering, Earth sciences, Environmental science, Geotechnical engineering, Construction engineering, Soil composition, Soil hydrology, Environmental engineering, Unsaturated soil, Expansive soil, Numerical simulation, Climate-ground interaction, Mechanical properties, Sensors, Wetting

Baca Jurnal (pdf)

 

Baca juga:

1. A hybrid transpiration model for water-limited conditions

2. Oedometer based estimation of vertical shrinkage of expansive soil in a large instrumented soil column

3. Genotypic variation in tolerance to drought stress is highly coordinated with hydraulic conductivity–photosynthesis interplay and aquaporin expression in field-grown mulberry (Morus spp.)

4. A vegetation-focused soil-plant-atmospheric continuum model to study hydrodynamic soil-plant water relations

5. Determination of the hydraulic conductivity function of grey Vertosol with soil column test

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