An experimental site in fissured calcareous media has been analyzed in the upper Jurassic of the Loue Valley (Franche-Comte). A core of some 30 metres has been drilled for hydrostructural purposes and investigated in field by different techniques (hydraulic injection tests between packers, physical measurements on the groundwater). The electrical conductivity water measure in bore hole is a simple and an efficient tool for supporting the hydrostructural analysis hypothesis in fractured rocks.

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