Current version: v.2.11.2

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COHERENS is a modelling system designed for a wide range of applications in coastal and shelf seas, estuaries, lakes and reservoirs. COHERENS follows a modular structure based on a numerical hydrodynamical model. It includes side-modules among which generic biological and sediment transport modules.

The development of COHERENS is led by researchers at RBINS in collaboration with worldwide scientists. COHERENS is available to the scientific community as a free and well-documented open source code.

About COHERENS » Register and download » Getting started »

Projects using COHERENS


: Regional-scale assessment of the land-ocean continuum ecosystems vulnerability to anthropogenic pressure (2020-2029). Funding: Belspo (FED-tWIN2019-prf-008). Promotors: RBINS and ULB.


: Management of the water quality in Vietnamese coastal waters impacted by CLIMate change and human induced DISasters using a marine modelling tool (2019-2023). Funding: Belspo (BL/36/VT43). Partners: RBINS (Coord.), IMER (Vietnam)


: Synergy between Mariculture & Passive Fisheries (2019-2022). Funding: Blue cluster, VLAIO (HBC.2019.0068). Partners: Colruyt Group (Coord.), Brevisco, AtSeaNova, Vlaamse Visveiling, ILVO, RBINS


: Earth Observation Services for Fishery, Bivalves Mariculture and Oysterground Restoration along European Coasts (2019-2022). Funding: EU-H2020. Partners: Deltares (Coord.), 27 partners including RBINS


: Distribution of shrimp species and modelling of the lake-Nokoué-ocean system in Benin (2020-2022). Funding: DGD, CEBioS program. Partners: RBINS-CEBioS, IRHOB (Benin).

Model features

COHERENS follows a modular structure and offers a wide range of physical and numerical schemes. It is written in FORTRAN 90 and can be used in parallel mode. Several file-formats, including netCDF, are available.

Full list of features » Get the full documentation »

Important keywords

numerical model, three-dimensional, shallow waters, coastal seas, shelf seas, estuaries, lakes, reservoirs, ocean, coastal applications, multi-purpose, high flexibility, modular structure, hydrodynamic, sediment transport, tracers, biology, free, open source, FORTRAN 90, parallel mode, netCDF, worldwide, large user community, comprehensive documentation

Latest news

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Test cases

Many different test cases have been implemented. They are described in detail in the COHERENS manual.

River test case
A non-rotating channel of uniform depth with open ends. Lateral effects are ignored.

See all available test cases »

The COHERENS forum

You will find answers to all your questions in the COHERENS users forum. The forum is moderated by seasoned COHERENS users.

Last forum posts

Recent publications
mentioning COHERENS

Afsharian S., Taylor P.A., Momayez L. (2020). Investigating the potential impact of wind farms on Lake Erie. Journal of Wind Engineering and Industrial Aerodynamics, 198: 104049.

Mehrfar,H., Azad M.T., Lari K., Bidokhti A.A. (2020). Seasonal Variations of the Coastal Currents and Eddies in the Persian Gulf: A Numerical Case Study. Marine Technology Society Journal, 54: 1-52.

Barbut L., Groot Crego C., Delerue-Ricard S., Vandamme S., Volckaert F.A.M., Lacroix G. (2019). How larval traits of six flatfish species impact connectivity. Limnology & Oceanography, 64: 1150-1171.

Dulière V., Gypens N., Lancelot C., Luyten P., Lacroix G. (2019). Origin of nitrogen in the English Channel and Southern Bight of the North Sea ecosystems. 2019. Hydrobiologia 845: 13-33.

More publications »