Current version: v.2.11

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What is COHERENS?

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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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

Features of coherence V2 by ChristopherS
Thu Nov 30, 2017 10:35 am

Procedure for testing the compilation. by Jeromeanderson
Sat Nov 25, 2017 4:15 am

make target_name error by mfaismail
Tue Oct 24, 2017 2:15 am

CIF files with COHERENS V2.11 by ropponen
Wed Oct 11, 2017 12:13 pm

Nesting by Sou
Tue Oct 10, 2017 9:10 pm

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 »