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Article Dans Une Revue First Break Année : 2012

Using high-resolution electrical resistivity maps in a watershed vulnerability study

Résumé

This paper illustrates the contribution of high-resolution geophysics and specifically apparent Electrical Resistivity (ER) at three depths of investigation (ARP(c) system) through the study of intrinsic vulnerability of a Catchment Area (CA). This CA is situated near Ambleville (Oise Valley, NE of Paris, France) and the study is carried out for Conseil General of the Oise Valley and Agence de Bassin Seine Normandy. This study made it possible to specify: topography; pedology (texture, clay content, permeability, depth of occurrence of basement (bedrock or parent material)) and geology (litho stratigraphy, faults) with a spatial resolution of the oder of 12m using ER maps. Three apparent ER maps were aggregated in a single Composite Map which was further calibrated by auger borings. Knowing these elements, it was possible to inform the method of description of vulnerability (DRASTIC) with: conditions of refill of the basin; zones of outcrops; geological undulations; nature and thickness of protection layers and/or the unsaturated zone; permeability of the surface layers and to define their participation into the hydro-geologic processes within the basin.The final agro-pedological map of intrinsic vulnerability of the Catchment Area was carried out in a GIS with high-spatial-resolution (12m). The produced data will be used by farmers for intra-field modulation of the inputs.
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Dates et versions

hal-02922141 , version 1 (27-08-2020)

Identifiants

  • HAL Id : hal-02922141 , version 1

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Michel Dabas, Thomas Jubeau, Dominique Rouiller, Jean-Marie Larcher, Séverine Charriere, et al.. Using high-resolution electrical resistivity maps in a watershed vulnerability study. First Break, 2012, 30 (8), pp.51-56. ⟨hal-02922141⟩
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