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Applying 3D Geostatistical Simulation to Improve the Groundwater Management Modelling of Sedimentary Aquifers: The Case of Doñana (Southwest Spain)

1
Facultad de Ciencias Geológicas, Universidad Complutense de Madrid, Calle José Antonio Novais 12, 28040 Madrid, Spain
2
Instituto Geológico y Minero de España, Calle Ríos Rosas-23, 28003 Madrid, Spain
*
Author to whom correspondence should be addressed.
Water 2019, 11(1), 39; https://doi.org/10.3390/w11010039
Received: 3 December 2018 / Revised: 19 December 2018 / Accepted: 20 December 2018 / Published: 26 December 2018
(This article belongs to the Special Issue Heterogeneous Aquifer Modeling: Closing the Gap)
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Abstract

Mathematical groundwater modelling with homogeneous permeability zones has been used for decades to manage water resources in the Almonte-Marismas aquifer (southwest Spain). This is a highly heterogeneous detrital aquifer which supports valuable ecological systems in the Doñana National Park. The present study demonstrates that it is possible to better characterize this heterogeneity by numerical discretization of the geophysical and lithological data available. We identified six hydrofacies whose spatial characteristics were quantified with indicator variogram modelling. Sequential Indicator Simulation then made it possible to construct a 3D geological model. Finally, this detailed model was included in MODFLOW through the Model Muse interface. This final process is still a challenge due to the difficulty of downscaling to a handy numerical modelling scale. New piezometric surfaces and water budgets were obtained. The classical model with zones and the model with 3D simulation were compared to confirm that, for management purposes, the effort of improving the geological heterogeneities is worthwhile. This paper also highlights the relevance of including subsurface heterogeneities within a real groundwater management model in the present global change scenario. View Full-Text
Keywords: geostatistics; hydrofacies; hydrogeological model; stochastic simulation; water balance geostatistics; hydrofacies; hydrogeological model; stochastic simulation; water balance
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Naranjo-Fernández, N.; Guardiola-Albert, C.; Montero-González, E. Applying 3D Geostatistical Simulation to Improve the Groundwater Management Modelling of Sedimentary Aquifers: The Case of Doñana (Southwest Spain). Water 2019, 11, 39.

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