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Article Dans Une Revue Hydrogeology Journal Année : 2022

Vadose zone modeling to identify controls on groundwater recharge in an unconfined granular aquifer in a cold and humid environment with different meteorological data sources

Sabrina Bruneau
Florent Barbecot
  • Fonction : Auteur
Marie Larocque
  • Fonction : Auteur
Viorel Horoi
  • Fonction : Auteur
Sophie Guillon
  • Fonction : Auteur

Résumé

Groundwater recharge (GR) is a complex process that is difficult to quantify. Increasing attention has been given to unsaturated zone modeling to estimate GR and better understand the processes controlling it. Continuous soil-moisture time series have been shown to provide valuable information in this regard. The objectives of this study were to (i) analyze the processes and factors controlling GR in an unconfined granular aquifer in a cold and humid environment and (ii) assess the uncertainties associated with the use of data from different sources. Soil moisture data monitored over three years at three experimental sites in southern Quebec (Canada) were used to calibrate the HYDRUS-1D model and to estimate ranges of possible GR in a region where groundwater is increasingly used as a source of fresh water. The simulations identified and quantified important factors responsible for the near-surface water balance that leads to GR. The resulting GR estimates from 2016 to 2018 showed marked differences between the three sites, with values ranging from 347 to 735 mm/y. Mean GR for the three sites was 517 mm/y for 2016-2018 and 455 mm/y for the previous 12-year period. GR was shown to depend on monthly variations in precipitation and on soil textural parameters in the root zone, both controlling soil-water retention and evapotranspiration. Monthly recharge patterns showed distinct preferential GR periods during the spring snowmelt (38-45% of precipitation) and in the fall (29% of precipitation). The use of different meteorological datasets was shown to influence the GR estimates.
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Origine : Publication financée par une institution
Licence : CC BY - Paternité

Dates et versions

hal-04153174 , version 1 (06-07-2023)

Identifiants

Citer

Sabrina Bruneau, Florent Barbecot, Marie Larocque, Viorel Horoi, Yves Coquet, et al.. Vadose zone modeling to identify controls on groundwater recharge in an unconfined granular aquifer in a cold and humid environment with different meteorological data sources. Hydrogeology Journal, 2022, 30, pp.653 - 672. ⟨10.1007/s10040-021-02429-6⟩. ⟨hal-04153174⟩
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