Dye Tracing Survey at Poitiers Experimental Hydrogeological Site

To verify the points mentioned in the introduction, a research methodology was defined at the University of Poitiers’s Le Deffend site, where 42 boreholes, drilled from 2002, have allowed two Poitou regional tables to be studied. This protocol includes the completion of a convergent radial tracing campaign with a total of six field fluorometers. The convergent radial tracing technique involves constant pumping within a central well with a parallel injection of the tracer, in this case, uranine, into a piezometer. Valeport Water’s Hyperion fluorometers were then installed at various depths within the piezometers between the injection and pumping stages.

CPGF HORIZON, with the assistance of the University of Poitiers and Valeport Water, has established a research and development programme.  The data acquired using Hyperion fluorometers allow these karst exchanges to be described. The knowledge acquired during this study is designed to facilitate future searches for drinking water on the Poitou threshold from an operational point of view.