General information

Reference

2026-4054  

Position description

Category

F13 Hydrogeology - Engineer / Researcher

Job title

Postdoctoral Researcher in Hydrogeology and Coastal Risks (F/M)

Contract

Permanent contract

Contractual hours

Full-time

Contract duration

24 months

Context and contributions of the position

The BRGM's work aims to advance geological knowledge and understanding of phenomena related to the ground and subsurface, with a key objective: to address the challenges posed by environmental change through innovative projects with societal implications.
The underground hydrosystems of dune fields, which form a transition zone between the continental and marine environments, are poorly monitored, documented and described in terms of their roles and functioning at national, regional or local level, despite their significant importance.
These dune aquifers support specific ecosystems and limit saltwater intrusion, but can also, locally, promote erosion. In the face of climate change and growing human pressure, a better understanding of how they function is essential to improve and adapt their management.
The BRGM, as part of Module 3 – Coastal Hydrosystem – of the DUNES research programme “Espace des transitions”, which aims to improve the understanding of the functioning of coastal groundwater systems, by adopting a multidisciplinary approach (geology, geophysics, hydrogeology, modelling) and via various field sites.

Job description

The research focuses on the characterisation and functioning of coastal hydrosystems affected by saltwater intrusion, with the aim of improving our understanding of their complexities and supporting the management of current and future challenges.
This work is based on two study sites in France: The Cap-Ferret sand spit, located between the Atlantic Ocean and the Arcachon Basin (Gironde,), constitutes a hydrosystem influenced by a dual marine forcing that remains poorly understood. Although saline intrusions have been observed on an ad hoc basis, the characterisation, geometry and potential dynamics of a double saline wedge remain unknown. To address these questions, data acquisition campaigns (geophysical and hydrogeological) will be carried out. Various conceptual operational models will be proposed across different transects in order to ultimately develop numerical hydrodynamic models (2D) that take density effects into account. These models will aim to simulate both short-term dynamics, such as tidal and waves influence, and long-term evolution related to climate change, while also taking into account possible local anthropogenic pressures.
The 2nd study site, located in Hossegor (Landes, France) is characterized by the presence of coastal salt lake. The drinking water supply for the southern Landes relies on shallow aquifers close to the coast, which are heavily used during the summer months. The issue of saltwater intrusion has been recognised locally for over thirty years, however, knowledge remains limited regarding both the spatial distribution of saline intrusion and its geometry.

Profile

In particular, you will draw on the following skills and qualities:

- strong scientific and technical knowledge in hydrogeology;
- strong hydrogeological modelling skills;
- data analysis and use of GIS tools;
- working knowledge of programming languages (Matlab, Python or R);
- knowledge of geochemistry, particularly isotopics, is an asset;
- autonomous, proactive, and able to work effectively within multidisciplinary teams;
- a good level of spoken and written English;
- ability to synthesise information and strong writing skills are required.

Working conditions

The postdoctoral researcher will be based at DRIS/R3C - Pessac. You will join a dynamic and multidisciplinary research team in hydrogeology, numerical modeling, and coastal dynamics. You will benefit from a stimulating and collaborative work environment to successfully conduct your research.

In an environment that promotes a healthy work-life balance, particularly through teleworking, BRGM is known for its supportive and friendly atmosphere.

Awarded the HRS4R label in 2021, we are committed to supporting you throughout your career at BRGM. We offer numerous resources to develop your skills and expertise, with opportunities for career advancement and geographical mobility.

At BRGM, you will benefit from several advantages, including a 13-month salary, paid time off (RTT), meal vouchers, and vacation and leisure benefits.

Position location

Job location

France, New Aquitaine, Gironde (33)

Location