8 A new concept of karst development based on hydrogeology and geophysics Occurrence ok karst 161 Fracture inventory 161 Stratigraphy versus seismic and acoustic data 162 Stratigraphy versus borehole electrical methods 164 Stratigraphy and hydrogeological data 167 Conclusion 168 References 169 Chapter 9 • The Deffend hydrogeological model 173 T. Gaillard Hydrogeological knowledge before Hydrogeological Experimental Site (HES) of Poitiers 173 Historical groundwater flow model of the Poitou Threshold 173 The Poitiers HES groundwater model 175 Karst dating 176 Syngenetic karstification hypothesis 178 Conclusion 182 References 182 Conclusion 187 J.-L. Mari and T. Gaillard Acknowledgements 191 J.-L. Mari and T. Gaillard
RkJQdWJsaXNoZXIy NjA3NzQ=