Groundwater Recharge Assessment in the Chateauguay River Watershed

Croteau, Anne; Nastev, Miroslav; Lefebvre, René

doi:10.4296/cwrj3504451

Cited by 44 publications

(54 citation statements)

References 19 publications

(18 reference statements)

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“…The differences in water levels for humid and dry conditions are smaller at lower elevations; these areas coincide with major discharge zones at the end of the groundwater flow system. Here, the recharge variations are also much lower (Croteau et al, 2010). In the case of recharge under dry conditions, the water level differences seem to be attenuated at low elevation by the groundwater flux coming from the upgradient zones; this contributes to a further decrease water levels in the recharge zones.…”

Section: Zoning Of Aquifer Sensitivitymentioning

confidence: 85%

“…On the other hand, for humid climate conditions, for which precipitation increased by 32%, the average recharge increased only by 15%. Croteau et al (2010) showed that spatially, the recharge variation in response to long-term variations of climate conditions is dependent on the local vertical stratigraphy and hydrogeological conditions. The zones most affected correspond to areas of highest recharge.…”

Section: Zoning Of Aquifer Sensitivitymentioning

confidence: 99%

“…Hydrogeological studies relevant to the assessment of "sustainable yield" included groundwater recharge estimation (Croteau et al, 2010) and numerical modelling of groundwater flow (Lavigne et al, 2010). The current study presents an approach that integrates the various conditions that should be considered to delineate priority groundwater management zones, and formulates the results into a simple index that can be used by non-specialists.…”

Section: Introductionmentioning

confidence: 99%

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Regional Sustainability of the Chateauguay River Aquifers

Lavigne¹,

Nastev²,

Lefebvre³

2010

Canadian Water Resources Journal

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Abstract:A steady increase in groundwater use in the Chateauguay River watershed has led to potential conflicts between various groundwater users. This study summarizes the quantity and sustainability estimations of the groundwater resources within this basin. Regional sustainability is defined with simulated drawdowns from uniform withdrawal scenarios compared to water levels obtained without any withdrawal. Three sustainable conditions are defined: sustainable withdrawal, withdrawal with increased drawdown, and unsustainable withdrawal. The current withdrawal rate of 34 Mm 3 /yr results in a median drawdown of 1.5 m, compared to pre-development conditions. This drawdown is well within the range considered sustainable, an indication that regional aquifers are not currently overexploited. A hypothetical pumping rate of 48 Mm 3 /yr, resulting in an average drawdown of 2.2 m, is the estimated sustainable limit. Increasing exploitation from 48 to 122 Mm 3 /yr would need tight control and planning. Withdrawal rates beyond 122 Mm 3 /yr are judged not sustainable as the regional median drawdown would exceed 8 m. The water levels in recharge areas are the most sensitive to groundwater extraction. The combination of aquifer sensitivity to recharge variations, simulated drawdown maps, and aquifer vulnerability to surface contamination reveals the most sensitive areas of the regional aquifers, areas that would need particular attention and protection by groundwater managers.Résumé : L'accroissement soutenu de l'utilisation de l'eau souterraine dans le bassin versant de la rivière Chateauguay pourrait conduire à des conflits d'usages potentiels entre les différents types d'utilisateurs. La présente étude résume les évaluations de la quantité et de la pérennité des ressources en eau souterraine. Le niveau régional d'exploitation durable est défini à partir des rabattements simulés pour des scénarios de prélèvement uniforme sur toute la région, par rapport aux niveaux d'eau simulés sans exploitation. Le présent niveau d'exploitation totale estimé à 34 Mm 3 /a entraîne des rabattements moyens de 1,5 m, comparé aux conditions sans exploitation. Ce rabattement se situe bien en deçà du niveau jugé durable, ce qui indique que les aquifères régionaux ne sont pas surexploités présentement. Un niveau d'exploitation théorique de 48 Mm 3 /a, qui entraîne des rabattements moyens de 2,2 m, est considéré être la limite du niveau d'exploitation durable. Une augmentation du niveau d'exploitation de 48 à 122 Mm 3

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Section: Zoning Of Aquifer Sensitivitymentioning

confidence: 85%

Section: Zoning Of Aquifer Sensitivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Regional Sustainability of the Chateauguay River Aquifers

Lavigne¹,

Nastev²,

Lefebvre³

2010

Canadian Water Resources Journal

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“…Samples were acquired for natural vegetation, including forest, wetland, shrub land, grassland and agricultural areas. The objective of the fieldwork was to collect data to produce a land cover map of the region required for the estimation of the spatial distribution of recharge to the regional aquifer units (Croteau et al, 2010). In addition to the fieldwork, aerial photographs of the region were assembled and used in the analysis.…”

Section: Field Datamentioning

confidence: 99%

Earth Observation Based Land Cover for Regional Aquifer Characterization

Latifovic¹,

Pouliot²,

Nastev³

2010

Canadian Water Resources Journal

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Managing groundwater resources requires quantification of several complex atmosphere/ surface properties affecting recharge, including precipitation, temperature, soils, land cover and land cover change. In this review we elaborate on some of the remote sensing techniques commonly applied for generating information about changes in land cover, over large geographical areas, which are often required for hydrogeological studies. Two case studies are presented: the Chateauguay River Basin (Quebec) and Casselman Township (Ontario). Both examples represent agriculture dominated landscapes that require a unique mapping approach to minimize confusion between agriculture and forest classes. The first example demonstrates a procedure for mapping land cover aerial extent and change using remote sensing data acquired off the peak of the growing season where agricultural fields can be most effectively discriminated from forests. In the second example three classification methods are compared for mapping specific crop types. Results did not show substantially greater performance for any one of the three methods. Differences in processing and theoretical advantages are considered the main criteria for selection. The analyzes undertaken highlight the need to minimize phenology effects between image dates, by selecting images before leaf out or after leaf senesce for effective change detection and using several dates of imagery over the growing season to effectively map crop types.Résumé : La gestion de la ressource eau souterraine nécessite la quantification de plusieurs paramètres complexes de l'atmosphère et de la surface qui influencent la recharge, dont la précipitation, la température, les sols, la couverture territoriale ainsi que de sa variabilité. Dans cette étude nous examinons certaines des techniques de télédétection couramment utilisées pour générer l'information utilisée pour les études hydrogéologiques concernant les changements de couverture territoriale sur de grandes superficies. Deux cas sont présentés: le bassin de la rivière Châteauguay (Québec) et le Canton de Casselman (Ontario). Les deux exemples portent sur un territoire à dominance agricole qui nécessitent une approche cartographique particulière afin de minimiser toute confusion entre les classes forestière et agricole. Le premier exemple illustre une procédure de cartographie spatiale de la couverture territoriale et de sa variation avec des données de télédétection acquises au climax de la saison de croissance quand il est le plus facile de distinguer les champs en culture des forêts. Dans le second exemple on compare trois méthodes de classification pour la cartographie de récoltes spécifiques. Les résultats ne montrent pas qu'une des 434 Canadian Water Resources Journal/Revue canadienne des ressources hydriques

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“…Latifovic et al (2010) elaborate on operational mapping methods for producing validated regional maps of land cover from optical satellite images. Croteau et al (2010) describe a procedure of using pedological maps, 3D surficial geology and 1D infiltration model (HELP) to obtain spatial and seasonal variation of the recharge rates. Lavigne et al (2010a) describe the hydraulic properties of the bedrock aquifers and present a numerical simulation of the regional groundwater flow and model calibration, while Lavigne et al (2010b) propose a methodology for estimation of the regional sustainability of the groundwater resources.…”

Section: Preface To the Special Issue On The Hydrogeology Of The Chatmentioning

confidence: 99%