ESR N° 6: Active Fiber-Optic DTS methods to monitor subsurface flow dynamics


Research Fellow: Behzad Pouladi, University of Rennes1, France

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Novel application of Active Fiber-Optic Distributed Temperature Sensing (FO-DTS) for characterization of subsurface media i.e. both fractured and porous media. The data acquired by continuously monitoring the temperature data by using FO-DTS will be inverted to obtain hydraulic tomographies.

Tasks and methodology 

  • Adapting these recent developments in various hydraulic conditions (cross-borehole interference tests, periodic hydraulic tests and ambient conditions) to test the possibility of using heat as a groundwater tracer in fractured media.
  • Testing the feasibility of developing an innovative hydraulic tomography approach based on distributed data on flows and temperature changes. The method will be based on active DTS methods thanks to buried cables within saturated porous media to quantify in-situ fluxes during hydraulic tests within sandy aquifers or saline wedges.
  • Employing multiphysics sensing method such as strain sensing will also be investigated for characterizing hydromechanical behaviors of heterogeneous media.


  • Olivier Bour
  • Laurent Longuevergne

Dissemination and communications

Poster presented during the 4th Cargèse Summer School : Temperature as a powerful tool in understanding the subsurface process and properties

Database for the future datasets : H+ database


Fiber-Optic Distributed Temperature Sensing: A novel Tool that allows continuous monitoring of the temperature along the fiber-optic cable with high spatial resolution.

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