Location map

Key findings

• Water origins and mixing: geochemical and isotopic tracers identified three main water sources—Cretaceous waters, Brestalou surface waters, and deep, mineralized Jurassic waters—and revealed their changing contributions to the spring.
• Karst dynamics: interaction between rapid conduit flow and slower matrix storage.
• Modelling: quantification of recharge, groundwater storage and pumping effects on spring discharge and flood attenuation.
• Wavelet analysis: identification of the different temporal scales linking rainfall, groundwater levels and spring discharge over 38 years.
• Active management: demonstration that groundwater abstraction modifies both resource availability and hydrological response.

Hydrogeological model

Picture gallery

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