This position has been filled !
The Department of Geosciences at CNRS Rennes is offering a PhD scholarship on the topic “Active Fiber-Optic DTS methods to monitor subsurface flow dynamics” starting preferably before July 1, 2017.
The project is funded by the Marie-Sklodowska-Curie Innovative Training Network “ENIGMA – EU Training Network for In situ imaGing of dynaMic processes in heterogeneous subsurfAce environments” within the Horizon 2020 Programme of the European Commission.
ENIGMA is a consortium of high profile universities, research institutions and companies located in France, Spain, Germany, Switzerland, Belgium, Denmark, Sweden, USA and UK, and will train 15 PhD students in total (Early Stage Researcher, ESR).
This particular PhD (ESR PhD 6) will be based at Department of Geosciences at CNRS Rennes with research stays at CSIC Barcelona, OSU Oregon, SILIXA.
Project description
Fiber Optic Distributed Temperature Sensing (FO-DTS) is an innovative tool that allows continuous temperature monitoring with an excellent spatial resolution. Recent applications demonstrate the utility of passive FO-DTS for characterizing flows and monitoring thermal tracer tests in heterogeneous media. Passive methods are however often limited to qualitative information about flow distribution. Active methods, which consists in using heated cables or local thermal sources showed very promising results to quantify distributed flow velocities. The first objective of the ESR will be to adapt these recent developments in various hydraulic conditions (cross-borehole interference tests, periodic hydraulic tests and ambient conditions) to develop an innovative hydraulic tomography approach in fractured media (Ploemeur and Äspö sites) based on distributed data on flows and temperature changes. The second objective of the ESR will be to develop similar active DTS methods in buried cables within saturated porous media in order to quantify in-situ fluxes within sandy aquifers (Hermalle site), saline wedges (Argentona site) and/or within the hyporheic zones (River Selke site). The obtained data and the results of inversion will be compared and combined with data and/or inversion scheme developed by ESR 2, 3, 4, 7, 11 and 14.
Contact
Olivier Bour
E-mail: olivier.bour(at)univ-rennes1.fr
Department/Location: Department of Geosciences CNRS Rennes