How basin model results enable the study of multi-layer aquifer response to pumping: the Paris Basin, France
How basin model results enable the study of multi-layer aquifer response to pumping: the Paris Basin, France
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DOI：
10.1007/s10040-013-0955-6
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发表时间：
2013-02
影响因子：
2.8
通讯作者：
C. Contoux;S. Violette;R. Vivona;P. Goblet;D. Patriarche
中科院分区：
文献类型：
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作者：
C. Contoux;S. Violette;R. Vivona;P. Goblet;D. Patriarche
巴黎盆地(法国)的阿尔比亚含水层自1841年以来一直被开采，并显示出急剧的下降。利用三维地下水流动模型，研究了阿尔卑斯盆地167年来多层含水层对抽水活动的水动力响应。这种三维流模型使用几何和水动力参数分布，这些分布是通过盆地建模继承自成因方法的，盆地模型创建了受地质历史约束的水动力特性的几何模式。本文旨在推广应用盆地模型方法(长时间尺度，248 Ma)来研究水动力资料稀少而地质资料多的情况下深层含水层对人为扰动(短时间尺度，167年)的响应。结果表明，参数分布不足以再现Albian含水层的行为，特别是突出了盆地模拟和地下水流动模拟之间特定存储系数的不同含义。将存储系数除以100，并包括可用的透射率数据，显著改善了模型/数据的比较。然后讨论了对深层含水层的潜在影响。这项研究揭示了盆地模型方法在三维地下水流模拟中的优势和局限性。
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.