Caractérisation hydrogéologique des hydrofaciès dans le paléodelta de la rivière Valin au Saguenay /

Boumaiza, Lamine

doi:10.1522/030084182

Cited by 7 publications

(2 citation statements)

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“…Using the measured sediment properties n and e combined with the effective grain-size characteristics (Table 2)-obtained using the grain-size curves (Figure 2)-we calculated an average K s value for each depth interval (the cumulative total of selected successive sediment subsamples is indicated as a "grouped subsample" in Table 2) using the five empirical methods described in Table 1. The average calculated K s values ranged from 4.4 × 10 −2 to 9.1 × 10 −2 cm/s (Table 2) due to the vertical various sand fractions combined with the variability of physical properties of the sediment (Table 2); they corresponded to the expected values for the Saint-Honoré granular aquifer (Boumaiza 2008;Boumaiza et al 2017Boumaiza et al , 2019b.…”

Section: Saturated Hydraulic Conductivitymentioning

confidence: 79%

“…We selected the Saint-Honoré aquifer because the thickness of the vadose zone of this aquifer is up to 7 m, and there is relevant available information related to the site, including groundwater recharge and water-table elevations (Tremblay 2005;Boumaiza 2008;Chesnaux and Stumpp 2018;Boumaiza et al 2019bBoumaiza et al , 2020Labrecque et al 2020). A borehole was drilled on May 23, 2019 using a hand threshing-beating auger.…”

Section: Subsurface Sediment Samplingmentioning

confidence: 99%

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Constraining a Flow Model with Field Measurements to Assess Water Transit Time Through a Vadose Zone

Boumaiza¹,

Chesnaux

Walter

et al. 2020

Groundwater

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The modeling of thick vadose zones is particularly challenging because of difficulties in collecting a variety of measured sediment properties, which are required for parameterizing the model. Some models rely on synthetic data, whereas others are simplified by running as homogeneous sediment domains and relying on a single set of sediment properties. Few studies have simulated flow processes through a thick vadose zone using real and comprehensive data sets comprising multiple measurements. Here, we develop a flow model for a 7-m-thick vadose zone. This model, combining the numerical codes CTRAN/W with SEEP/W, includes the measured sediment hydraulic properties of the investigated vadose zone and incorporates the actual climate and subsurface conditions of the study site (precipitations, water-table elevations, and stable isotope data). The model is calibrated by fitting the simulated and measured vertical profiles of water content. Our flow model calculates a transit time of 1 year for the travel of water through the 7-m vadose zone; this estimate matches stable isotope-based results obtained previously for this site. A homogeneous sediment domain flow model, which considers only a single set of sediment properties, produces a transit time that is approximately half the duration of that of the heterogeneous flow model. This difference highlights the importance of assuming heterogeneous material within models of thick vadose zones and testifies to the advantage gained when using real sediment hydraulic properties to parametrize a flow model.

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Section: Saturated Hydraulic Conductivitymentioning

confidence: 79%