Mise en évidence de fortes circulations verticales temporaires entre zones humides et aquifères alluviaux et régionaux

Abstract : Tensiometric and piezometric values were recorded in an alluvial valley of the Seine wetland from February to November 1998. As a consequence of two flood events, the groundwater head once rose above the soil surface. When the water level in the Seine decreased, the vertical hydraulic gradient between the underlying Senonian chalk and the alluvia increased to 16 parts per thousand. During the few days of recession the alluvial wetlands were fed by an upward flow from the regional chalk aquifer and drained towards the river through a more permeable alluvial layer (1.5 m to 7 m below soil surface). ((C) Academie des sciences / Elsevier, Paris.).
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Philippe Weng, Anne Coudrain-Ribstein, Cyril Kao, Hocine Bendjoudi, Ghislain De Marsily. Mise en évidence de fortes circulations verticales temporaires entre zones humides et aquifères alluviaux et régionaux. Comptes rendus de l’Académie des sciences. Série IIa, Sciences de la terre et des planètes, Elsevier, 1999, 329 (4), ⟨10.1016/S1251-8050(99)80244-4⟩. ⟨ird-01230632⟩

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