Val d’Orléans

The alignment of various observation sites along major karst conduits makes it possible to sample groundwater of various underground residence times. Monitoring an artificial tracer from one point to another in the system makes it possible to study the hydro-chemical evolution of a water mass in an underground environment as a function of its residence time, dilution phenomena, mixing, and reactions within the system. The Val d’Orléans site offers unique direct access to study how the saturated zone functions.

This arrangement makes it possible to conduct transverse research on three major scientific axes :

  • The in-situ study of flows and kinematics of chemical reactions in the conduit.
  • Validation of new approaches to geophysical conduit characterization or to hydrogeologic modeling suitable to karst environments, and
  • Analysis of aquifer vulnerability in the face of environmental changes through studies of long-term records whose collection began more than 100 years ago.