Occasional flooding has been experienced by City of Strasbourg in the entire urban area. In an effort to improve the knowledge and the management during flood events, DHI was engaged to build a numerical model, which can describe, in detail, flood extents, water depths and flow velocities for several return periods.

The created model represents realistically the entire river/canal network (including the Ill River and the Bruche River) and the complex inter-linkages between these as well as the low-lying flood plain areas. Thanks to this model, it is now better understood how floods occur and can be controlled. Many engineering solutions have been analysed and proposed in order to reduce the flood risk. The model is now used by trained staff from City of Strasbourg as a management tool.

The project was carried out in a successful collaboration with the two companies CEMAGREF and CEREVE, who were responsible for the hydrological analysis of rainfall events in the watershed areas.