NDLI: How basin model results enable the study of multi-layer aquifer response to pumping: the Paris Basin, France

Content Provider	Springer Nature Link
Author	Contoux, Camille Violette, Sophie Vivona, Raffaella Goblet, Patrick Patriarche, Delphine
Copyright Year	2013
Abstract	The Albian aquifer of the Paris Basin (France) has been exploited since 1841 and shows drastic drawdown. A three-dimensional (3D) groundwater flow model is used to study the hydrodynamic response of the multi-layered aquifers to pumping activity in the Albian, at basin scale over 167 years. This 3D flow model uses geometry and hydrodynamic parameter distributions that are inherited from a genetic approach through basin modelling, the basin model creating a geometric pattern of hydrodynamic properties constrained by geological history. The paper aims to promote the use of the basin model approach (long time scale, 248 Ma) for the study of deep-aquifer response to anthropogenic perturbation (short time scale, 167 years) in situations for which hydrodynamic data are scarce but geological data are numerous. The results show that parameter distribution is insufficient to reproduce the Albian aquifer behaviour, notably highlighting a different meaning of the specific storage coefficient between basin modelling and groundwater-flow modelling. Dividing the storage coefficient by 100 and including available transmissivity data significantly improved the model/data comparison. The potential impact on a deep aquitard is then discussed. This study sheds light on the advantages and limitations of the basin model approach for groundwater-flow modelling in 3D.L’aquifère de l’Albien dans le Bassin Parisien (France) est exploité depuis 1841 et présente un rabattement important. Un modèle d’écoulement souterrain en trois dimensions est utilisé pour étudier la réponse hydrodynamique du système d’aquifères multicouche sur 167 ans, à l’échelle du bassin. Ce modèle hydrogéologique utilise la géométrie et les propriétés hydrodynamiques héritées d’une approche génétique via un modèle de bassin, qui crée une géométrie habillée en propriétés hydrodynamiques en fonction de l’histoire géologique du bassin. Cet article cherche à promouvoir l’intérêt de l’approche modèle de bassin (échelle de temps longue, 248 Ma) pour étudier la réponse des aquifères profonds à des perturbations anthropiques (échelle de temps courte, 167 ans) lorsque les données hydrodynamiques sont en nombre limité mais les données géologiques nombreuses. Les résultats montrent que la distribution des paramètres héritée de l’approche génétique ne permet pas de reproduire le comportement de l’aquifère de l’Albien, mettant notamment en exergue une différence de signification physique du coefficient d’emmagasinement spécifique entre modèle de bassin et modèle d’écoulement souterrain. La diminution de ce coefficient par un facteur 100 et l’implémentation des données de transmissivités disponibles pour l’aquifère de l’Albien améliorent significativement la comparaison modèle/données. Le potentiel impact sur un aquitard profond du bassin est ensuite discuté. Cette étude permet aussi de révéler l’intérêt et les limites de l’approche génétique fondée sur l’utilisation d’un modèle de bassin pour développer un modèle d’écoulement souterrain en 3D.El acuífero Albiano de la cuenca de París (Francia) ha sido explotado desde 1841 y muestra un drástico agotamiento. Se utilizó un modelo de flujo de agua subterránea tridimensional (3D) para estudiar la respuesta hidrodinámica de acuíferos multicapas a la actividad de bombeo en el Albiano, a escala de cuenca durante 167 años. Este modelo de flujo 3D usa la geometría y las distribuciones de parámetros hidrodinámicos que son inherentes a una aproximación genética a través del modelado de la cuenca; el modelo de cuenca crea un patrón geométrico de las propiedades hidrodinámicas limitadas por la historia geológica. El objetivo del trabajo es promover el uso de la aproximación del modelo de cuenca (a escala de largo plazo, 248 Ma) para el estudio de la respuesta de los acuíferos profundos a la perturbación antropogénica (a escala de corto plazo, 167 años) en situaciones para las cuales los datos hidrodinámicos son escasos pero los geológicos son numerosos. Los resultados muestran que las distribución de parámetros es insuficiente para reproducir el comportamiento del acuífero Albiano, destacando sobre todo un distinto significado del coeficiente de almacenamiento específico entre el modelado de cuencas y la modelización del flujo de aguas subterráneas. La división del coeficiente de almacenamiento por 100 e incluyendo los datos de transmisividad disponibles mejoraron significativamente la comparación de datos/modelo. Luego se discute el impacto potencial sobre un acuitardo profundo. Este estudio arroja luz sobre las ventajas y limitaciones de una aproximación de modelo de cuenca para el modelado de flujo de agua subterránea en 3D.O aquífero Albiano da Bacia de Paris (França) tem sido explorado desde 1841 e mostra rebaixamentos drásticos. Um modelo tridimensional (3D) de escoamento de águas subterrâneas foi utilizado para estudar a resposta hidrodinâmica ao bombeamento dos aquíferos multicamadas do Albiano, à escala da bacia, ao longo de 167 anos. Este modelo de fluxo 3D usa a geometria e as distribuições dos parâmetros hidrodinâmicos, herdados de uma abordagem genética através da modelação da bacia, criando no modelo de bacia um padrão geométrico de propriedades hidrodinâmicas conformadas pela história geológica. O trabalho tem como objetivo promover o uso da abordagem de um modelo de bacia (escala de tempo, 248 Ma) para o estudo da resposta do aquífero profundo a perturbações antrópicas (escala de tempo curta, 167 anos) em situações para as quais os dados hidrodinâmicos são escassos, mas os dados geológicos são numerosos. Os resultados mostram que a distribuição de parâmetros não é suficiente para reproduzir o comportamento do aquífero Albiano, realçando nomeadamente um significado diferente do coeficiente de armazenamento específico entre o modelo de bacia e o modelo de escoamento de águas subterrâneas. Dividindo o coeficiente de armazenamento por 100 e incluindo os dados de transmissividade disponíveis, observou-se uma melhoria significativa na comparação modelo/dados. O impacte potencial sobre um aquitardo profundo é, então, discutido. Este estudo lança luz sobre as vantagens e limitações da abordagem do modelo de bacia para o estudo do escoamento de águas subterrâneas em 3D.
Starting Page	545
Ending Page	557
Page Count	13
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	21
Issue Number	3
e-ISSN	14350157
Language	Portuguese
Publisher	Springer-Verlag
Publisher Date	2013-02-08
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Multi-layered aquifer system Numerical modelling France Groundwater flow Specific storage coefficient Hydrogeology Hydrology/Water Resources Geology Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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