Open source environmental hydraulics software

openTELEMAC is much more than a computation suite: it is a complete modelling system, driven by an international consortium of industrial and academic partners
Origin & Legitimacy
- Over 35 years of development at EDF
- Released as open source under the GNU GPL licence since 2010 by the TELEMAC-MASCARET consortium
- At the heart of a vast network of academic and industrial players in environmental hydraulics
Technical power
- 1D, 2D and 3D hydrodynamics: MASCARET, TELEMAC-2D, TELEMAC-3D
- Coupled modules: sediments (GAIA), ice (KHIONE), waves (TOMAWAC, ARTEMIS), water quality (WAQTEL)
- Finite elements and finite volumes, optimised for kilometre-scale domains and multi-year time scales
Quality & Reliability (V&V)
- 200 validation cases representative of the modelled physics
- User feedback passed directly to EDF R&D and the consortium developers
- User, theory and validation documentation
HPC performance
- Multi-thread and multi-core parallelisation
- Suited to industrial HPC use
- Large-scale flood, coastal surge and shoreline simulations with no licence cost
Open Source & Transparency
- Free: no licence cost, accessible to everyone
- Open source code, a reference in hydraulics training
- A community that meets every year at the TELEMAC User Conference
Ready to master openTELEMAC?
Useful links
Our latest news
In-depthThe foundation of continuous mechanics: Cauchy momentum equation
May 29, 2026
In-depthThe questions you're legitimately asking about Open Source simulation
Considering open source, even partially, raises legitimate questions.
Our answers, based on the experience of the industrial players who made the switch
March 4, 2026
NewsA new website to easily access our open-source simulation codes developed by EDF R&D
Discover open‑source solvers like Code_Aster, Code_Saturne, OpenTELEMAC and platforms such as Salome at open‑simulation‑center.org. Unified, reproducible.
February 13, 2026