On the use of multiple-point statistics to improve groundwater flow modeling in karst aquifers: A case study from the Hydrogeological Experimental Site of Poitiers, France

•Multiple-point statistics are applied to describe karst features in a limestone aquifer.•A numerical flow model is used to simulate responses to pumping test experiments.•The main flow behaviors evident in the field data are reproduced.•The spatial structure of the karst features influences these b...

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Veröffentlicht in:Journal of hydrology (Amsterdam) 2017-02, Vol.545, p.109-119
Hauptverfasser: Le Coz, Mathieu, Bodin, Jacques, Renard, Philippe
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creator Le Coz, Mathieu
Bodin, Jacques
Renard, Philippe
description •Multiple-point statistics are applied to describe karst features in a limestone aquifer.•A numerical flow model is used to simulate responses to pumping test experiments.•The main flow behaviors evident in the field data are reproduced.•The spatial structure of the karst features influences these behaviors. Limestone aquifers often exhibit complex groundwater flow behaviors resulting from depositional heterogeneities and post-lithification fracturing and karstification. In this study, multiple-point statistics (MPS) was applied to reproduce karst features and to improve groundwater flow modeling. For this purpose, MPS realizations were used in a numerical flow model to simulate the responses to pumping test experiments observed at the Hydrogeological Experimental Site of Poitiers, France. The main flow behaviors evident in the field data were simulated, particularly (i) the early-time inflection of the drawdown signal at certain observation wells and (ii) the convex behavior of the drawdown curves at intermediate times. In addition, it was shown that the spatial structure of the karst features at various scales is critical with regard to the propagation of the depletion wave induced by pumping. Indeed, (i) the spatial shape of the cone of depression is significantly affected by the karst proportion in the vicinity of the pumping well, and (ii) early-time inflection of the drawdown signal occurs only at observation wells crossing locally well-developed karst features.
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subjects Catalysis
Chemical Sciences
Heterogeneous media
Karst conduit network simulation
Pumping tests
Reservoir
title On the use of multiple-point statistics to improve groundwater flow modeling in karst aquifers: A case study from the Hydrogeological Experimental Site of Poitiers, France
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