149 7. Hydrogeological flow logging and dye tracer tests on the Hydrogeological Experimental Site observed mass transfers. These transfer fluxes are consistent with the borehole flow results obtained during pumping tests on MP6 (Fig. 4). Furthermore, the stratified organization of karst conduits is corroborated by field observations of rock outcrops located a few kilometres from the HES, within the same lithostratigraphic horizons (Gaillard et al., 2024). References Audouin O., Bodin J., Porel G., Bourbiaux B. (2008). Flowpath structure in a limestone aquifer: multi-borehole logging investigations at the hydrogeological experimental site of Poitiers, France, Hydrogeology Journal, 16: 939-950. https://doi.org/10.1007/s10040-008-0275-4 Bodin J., Porel G., Nauleau B., Paquet D. (2022). Delineation of discrete conduit networks in karst aquifers via combined analysis of tracer tests and geophysical data, Hydrology and Earth System Sciences, 26 (6): 1713-1726. https://doi. org/10.5194/hess-26-1713-2022 Castany J., Margat J. (1977). Dictionnaire français d’hydrogéologie (French dictionary of hydrogeology). BRGM Ed. Gaillard T., Moreau M., Mari J.-L. (2024). Seismic and stratigraphic characterization of karstogenic horizons in a sequence of carbonate deposits: Example of the Dogger limestones of the Poitou threshold. In E3S Web of Conferences, Volume 504 (2024) Journées Scientifiques AGAP Qualité 2024, Poitiers, France, 26 au 28 mars 2024, Published online: 26 March 2024, Published online: 26 March 2024. https://doi.org/10.1051/e3sconf/202450405005 Gaillard T., Moreau M. (2026). “Hydrogeology of the Poitou Threshold”, Chapter 3 in A new concept of karst development based on hydrogeology and geophysics, EDP Science, https://doi.org/10.1051/978-2-7598-3934-6.c003 Keys W.S. (1990) Borehole geophysics applied to ground-water investigations. Techniques of Water Resources Investigations, book 2, chapt. E-2, US Geological Survey, Reston, VA. Mangin A. (1975). Contribution à l’étude hydrodynamique des aquifères karstiques, troisième partie: constitution et fonctionnement des aquifères karstiques [Contribution to the hydrodynamic study of karst aquifers, part three: constitution and functioning of karst aquifers]. Annales de spéléologie, 30(1): 21-124. Mari J.-L., Porel G. (2008). 3D Seismic Imaging of a Near-Surface Heterogeneous Aquifer: A Case Study. Oil & Gas Science and Technology (IFP), 63(2): 179-201. https://doi.org/10.2516/ogst:2007077
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