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 »

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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Join our low-volume mailing list and automatically get important announcements and information about new releases.

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

Dispersion of vendace eggs and larvae around potential nursery areas reveals their reproductive strategy by juntunen
Wed Mar 20, 2019 1:26 pm

New article by juntunen
Wed Mar 20, 2019 11:04 am

Problem in Plume test case by juntunen
Tue Mar 05, 2019 6:18 am

how to enable parallel mode? by sara.ocean
Mon Nov 12, 2018 1:13 pm

Test Case by smilesmile
Thu Nov 01, 2018 2:43 am

Recent publications
mentioning COHERENS

Oganjan, Katarina, et al. "Factors affecting the recruitment of Amphibalanus improvisus and Dreissena polymorpha in a highly eutrophic brackish bay." Estuarine, Coastal and Shelf Science 184 (2017): 37-45.

Van Lancker, Vera, et al. "Building a 4D Voxel-Based Decision Support System for a Sustainable Management of Marine Geological Resources." Oceanographic and Marine Cross-Domain Data Management for Sustainable Development. IGI Global, 2017. 224-252.

Amour, Idrissa, and Tuomo Kauranne. "A Variational Ensemble Kalman Filtering method for data assimilation using 2D and 3D version of COHERENS model." International Journal for Numerical Methods in Fluids (2016).

Akbari, P., M. Sadrinasab, and F. Bateni. "Three-Dimensional Numerical Modeling Study of Thermal Pollution and its effect on dissolved oxygen and chlorophyll." (2016).

More publications »