<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Artificial basins are used to recharge groundwater and protect water pumping fields. In these basins, infiltration rates are monitored to detect any decrease in water infiltration in relation with clogging. However, miss-estimations of infiltration rate may result from neglecting the effects of water temperature change and air-entrapment. This study aims to investigate the effect of temperature and air entrapment on water infiltration at the basin scale by conducting successive infiltration cycles in an experimental basin of 11869 m<sup>2</sup> in a pumping field at Crepieux-Charmy (Lyon, France). A first experiment, conducted in summer 2011, showed a strong increase in infiltration rate; which was linked to a potential increase in ground water temperature or a potential dissolution of air entrapped at the beginning of the infiltration. A second experiment was conducted in summer, to inject cold water instead of warm water, and also revealed an increase in infiltration rate. This increase was linked to air dissolution in the soil. A final experiment was conducted in spring with no temperature contrast and no entrapped air (soil initially water-saturated), revealing a constant infiltration rate. Modeling and analysis of experiments revealed that air entrapment and cold water temperature in the soil could substantially reduce infiltration rate over the first infiltration cycles, with respective effects of similar magnitude. Clearly, both water temperature change and air entrapment must be considered for an accurate assessment of the infiltration rate in basins.</p></abstract>

Artificial basins are used to recharge groundwater and protect water pumping fields. In these basins, infiltration rates are monitored to detect any decrease in water infiltration in relation with clogging. However, miss-estimations of infiltration rate may result from neglecting the effects of water temperature change and air-entrapment. This study aims to investigate the effect of temperature and air entrapment on water infiltration at the basin scale by conducting successive infiltration cycles in an experimental basin of 11869 m2 in a pumping field at Crepieux-Charmy (Lyon, France). A first experiment, conducted in summer 2011, showed a strong increase in infiltration rate; which was linked to a potential increase in ground water temperature or a potential dissolution of air entrapped at the beginning of the infiltration. A second experiment was conducted in summer, to inject cold water instead of warm water, and also revealed an increase in infiltration rate. This increase was linked to air dissolution in the soil. A final experiment was conducted in spring with no temperature contrast and no entrapped air (soil initially water-saturated), revealing a constant infiltration rate. Modeling and analysis of experiments revealed that air entrapment and cold water temperature in the soil could substantially reduce infiltration rate over the first infiltration cycles, with respective effects of similar magnitude. Clearly, both water temperature change and air entrapment must be considered for an accurate assessment of the infiltration rate in basins.

Water infiltration in an aquifer recharge basin affected by temperature and air entrapment

LTHE UMR5564 Laboratoire d'étude des Transferts en Hydrologie et Environnement

Veolia Environnement Recherche et Innovation

LEHNA UMR5023 Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés

Université Lyon 1, ENTPE, CNRS, INRA, Campus de Vaulx-en-Velin

Journal of Hydrology and Hydromechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Artificial basins are used to recharge groundwater and protect water pumping fields. In these basins, infiltration rates are monitored to detect any decrease...

Water infiltration in an aquifer recharge basin affected by temperature and air entrapment

Publié en ligne: 22 juil. 2017

Pages: 222 - 233

Reçu: 01 juin 2016

Accepté: 06 déc. 2016

DOI: https://doi.org/10.1515/johh-2017-0010

Mots clés
Aquifer recharge, Unsaturated/saturated modeling, Infiltration test, Air entrapment, Temperature dependence

© 2017 Sébastien Loizeau et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Water infiltration in an aquifer recharge basin affected by temperature and air entrapment

Publié en ligne: 22 juil. 2017

Pages: 222 - 233

Reçu: 01 juin 2016

Accepté: 06 déc. 2016

DOI: https://doi.org/10.1515/johh-2017-0010

Mots clésAquifer recharge, Unsaturated/saturated modeling, Infiltration test, Air entrapment, Temperature dependence

© 2017 Sébastien Loizeau et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Aquifer recharge, Unsaturated/saturated modeling, Infiltration test, Air entrapment, Temperature dependence