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Carnot Post-doc « Experimentation and numerical modeling in hydrogeophysics » H/F


Détail de l'offre

Informations générales

Référence

2019-1449  

Description du poste

Métier

F10 Géophysique - Expert·e scientifique

Intitulé du poste

Carnot Post-doc « Experimentation and numerical modeling in hydrogeophysics » H/F

Contrat

CDD

Temps de travail

Temps complet

Durée du contrat

12 mois

Description de la mission

As a national geological service, BRGM is the reference public institution in Earth science applications for managing soil and subsoil resources and risks (www.brgm.fr). Its action is oriented towards scientific research, support for public policies and international cooperation.

As part of your mission, you will be mainly responsible for:
- Performing a bibliographic synthesis in order to establish a state of the art on coupled multiphysical (hydro-geophysical) modeling integrating multiphasic phenomena (water/pollutant/air) that are essentials for the study of LNAPL behavior;
- Carrying out measurements of complex electrical resistivity and permittivity at the laboratory scale (1D and 2D tanks) to describe coupled geophysical, chemical and hydraulic phenomena;
- Developing a computation code to couple the models of the tri-phasic flow and the complex electrical resistivity in order to predict the hydro-geophysical behavior. This code will be validated by laboratory experiments;
- Valorizing results (conferences and rank A publications).

Contexte

Within the Safety and Performance of Underground Uses Unit, Risks and Prevention Department, you will participate in research activities on the impact of pollution on geophysical signals. This work will be carried out in active collaboration with the Site and Polluted Soil Unit of the Water, Environment and Ecotechnologies Department.

Identifying, monitoring and treating pollution caused by light refined petroleum hydrocarbons (gasoline, diesel, engine oil, etc.) is a major environmental issue. These pollutants are part of the LNAPLs (Light Non-Aqueous Phase Liquids) that are immiscible liquids lighter than water. At high concentration, they accumulate at the top of the aquifer and form a pure phase product called supernatant. Currently, diagnosis of such pollution is limited because it is usually performed by: i. carrying outsoil, gas and water analyzes as well as measuring the supernatant thickness; ii. extrapolating data between measurement/analysis points. The proposed work aims to combine these methods with complex electrical resistivity in order to characterize LNAPLs. The work will consist in laboratory measurements as well as numerical modelling to describe pollutant flow and relate it to the geophysical signal in order to estimate residual soil levels for improving supernatant recovery.

Profil

You hold a PhD degree in Geophysics for less than five years (Electrical/Electromagnetic methods) and/or in numerical modeling of multiphase flow in porous media.
Profile:
You hold a PhD degree for less than 5 years and have research experience in the field of geophysical and/or multiphysical modeling attested by rank A publications.


You will use the following skills and qualities:
- Proficiency in multiphase flow modeling of porous media and processing of geophysical data;
- Good knowledge in electrical and/or electromagnetic methods;
- Interest for experimentation; a first experience of laboratory experimentations would be a plus;
- Proficiency in English (read, written, spoken);
- Interest in multidisciplinary teamwork;
- Initiative and autonomy.

Spécificité du poste

Specificity of the position:
This full-time position may involve travels in France and abroad.

Application:
All our positions are open to people with disabilities.
Please send your application (updated CV and cover letter) until January 1st, 2020.

Localisation du poste

Localisation du poste

France, Centre-Val de Loire, Loiret (45)

Ville

Orléans

Critères candidat

Langues

  • Anglais (Courant)
  • Français (Bilingue)