Estimation of saturated hydraulic conductivity from ring infiltrometer test taking into account the surface moisture stain extension
| Autor: | Yvan Rossier, Aurore Réfloch, Jean-Paul Gaudet, Laurent Oxarango |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Fluid Flow and Transfer Processes
infiltration basin 010504 meteorology & atmospheric sciences Surface moisture Mechanical Engineering saturated hydraulic conductivity 0208 environmental biotechnology Numerical modeling Soil science Hydraulic engineering 02 engineering and technology Ring (chemistry) 01 natural sciences Stain 020801 environmental engineering numerical modeling Hydraulic conductivity anisotropy of hydraulic conductivity Environmental science Infiltrometer Geotechnical engineering ring infiltrometer test TC1-978 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Journal of Hydrology and Hydromechanics, Vol 65, Iss 3, Pp 321-324 (2017) |
| ISSN: | 0042-790X |
| DOI: | 10.1515/johh-2017-0019 |
| Popis: | A large single-ring infiltrometer test was performed in order to characterize the saturated hydraulic conductivity below an infiltration basin in the well field of Lyon (France). Two kinds of data are recorded during the experiment: the volume of water infiltrated over time and the extension of the moisture stain around the ring. Then numerical analysis was performed to determine the saturated hydraulic conductivity of the soil by calibration. Considering an isotropic hydraulic conductivity, the saturated hydraulic conductivity of the alluvial deposits is estimated at 3.8 10−6 m s−1. However, with this assumption, we are not able to represent accurately the extension of the moisture stain around the ring. When anisotropy of hydraulic conductivity is introduced, experimental data and simulation results are in good agreement, both for the volume of water infiltrated over time and the extension of the moisture stain. The vertical saturated hydraulic conductivity in the anisotropic configuration is 4.75 times smaller than in the isotropic configuration (8.0 10−7 m s−1), and the horizontal saturated hydraulic conductivity is 125 times higher than the vertical saturated hydraulic conductivity (1.0 10−4 m s−1). |
| Databáze: | OpenAIRE |
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