Hydrogeology and hydrogeochemistry of the Chaudière River watershed aquifers, Québec, Canada

The potential of major ion chemistry to assess groundwater vulnerability of a regional aquifer in southern Quebec (Canada)

“…The Na-Cl water type represents confined conditions and is associated to a mixing with trapped marine pore-water. Charron (1978), Cloutier et al (2008Cloutier et al ( , 2010, Beaudry (2013) and Benoit et al (2014) described similar hydrogeochemical facies for other southern Quebec bedrock aquifers.…”

Geochemistry of groundwater in the Saint-Édouard area, Quebec, Canada, and its influence on the distribution of methane in shallow aquifers

“…LMWL) established byBenoit et al (2014) at a meteorological station located in Saint-Nicolas, approximately 30 km east of our study area. Values in groundwater vary between -65 and -87‰ for δ 2 H, and between -10.2 and -12.8‰ for δ 18 O.…”

Regional groundwater flow dynamics and residence times in Chaudière-Appalaches, Québec, Canada: Insights from numerical simulations

“…As groundwater is fundamental to the local economy, groundwater resources within the CA region, both in terms of quantity and quality, have been the focus of a number of studies over the past three decades, culminating in the current PACES project. These projects have helped to characterize the resource, focusing on the most densely populated Chaudière River watershed (McCormack 1982;Rousseau et al 2004;Benoît et al 2009;Benoît et al 2011;Brun Koné 2013;Benoît et al 2014;Carrier et al 2014;Lefebvre et al 2015). Based primarily on data collected from shallow residential wells (with average depths of approximately 60m), these studies have provided important information on groundwater quality and aquifer properties, concluding that groundwater flow mainly occurs within Figure 1 Location and topography of the Chaudière-Appalaches study area, and location of 2D regional cross-Section model, modified from Lefebvre et al (2015) permeable valley sediments and in the top fractured part of the bedrock (< 30m) (Brun Koné 2013; Benoît et al 2014;Crow and Ladevèze 2015;Ladevèze et al, 2016;Ladevèze et al 2017;Ladevèze 2017).…”

“…These projects have helped to characterize the resource, focusing on the most densely populated Chaudière River watershed (McCormack 1982;Rousseau et al 2004;Benoît et al 2009;Benoît et al 2011;Brun Koné 2013;Benoît et al 2014;Carrier et al 2014;Lefebvre et al 2015). Based primarily on data collected from shallow residential wells (with average depths of approximately 60m), these studies have provided important information on groundwater quality and aquifer properties, concluding that groundwater flow mainly occurs within Figure 1 Location and topography of the Chaudière-Appalaches study area, and location of 2D regional cross-Section model, modified from Lefebvre et al (2015) permeable valley sediments and in the top fractured part of the bedrock (< 30m) (Brun Koné 2013; Benoît et al 2014;Crow and Ladevèze 2015;Ladevèze et al, 2016;Ladevèze et al 2017;Ladevèze 2017). Furthermore, Benoît et al (2014) and Lefebvre et al (2015) also highlighted geochemical signatures left behind by the invasion of the Champlain Sea, which flooded the northern areas of the Chaudière-Appalaches region (Figure 1) between about 12,000 to 10,000 years ago (Parent and Occhietti 1988), thereby showing that geochemical signatures of this event can still be seen today.…”

“…Many past studies have identified the regional aquifer as being located in the uppermost portion of the bedrock where fracture density is highest (Lefebvre et al 2015;Benoît et al 2014;Ladevèze et al, 2016). Major faults could also represent areas where the level of fracturing could be relatively high, although the role of these faults on the regional flow system is not clear.…”