Hydrodynamic numerical models are used to simulate different discharge scenarios and are an indispensable tool for water management planning. By means of these models simulations can be run for relevant design events like HQ100 to determine, for example, inundation areas or necessary dam heights. The models also provide important insights for navigation and waterway management. For example, the effects of planned hydraulic structures (groynes) on the formation of fords or the flow conditions at newly constructed berths can be calculated as well. The models thus provide professional input for (research) projects and hydraulic engineering measures. Additionally, the results can serve as basis for project applications and funding proposals.
The aim of this activity is the maintenance, support and enhancement of the hydrodynamic models for the Danube, the March and the Thaya as well as their provision to other viadonau departments (e.g. flood protection, ecology, navigation) and external partners (e.g. Länder Upper and Lower Austria).


  • Federal and Länder (federal states) authorities:
    mutual exchange of experience with the Länder Upper and Lower Austria, provision of expert knowledge and gauging data by viadonau, e. g. flood protection for the Eferdinger Becken
  • Civil engineers
  • Universities


continuous further development since 2005

News and activity status

In 2017, the optimisation of several groynes in the ford area Bad Deutsch-Altenburg was supported, among other tasks. The optimisation of the groynes was planned using a highly specialised software (state of the art). The hydrodynamic modeling showed that the changed flow dynamics caused by the optimised groynes could also be simulated by means of a customary and in Austria very common software package. The adjustments of the hydraulic structures were implemented in the framework of the Catalogue of Measures for the Danube east of Vienna.

In the reporting period 2018, a feasibility study for the "IM_STROM" project was commissioned and technically supported. The combination of mathematical optimization algorithms with hydrodynamic models to solve complex hydraulic problems was investigated.           
In addition, the Office of the Upper Austrian Government, Department for Water Management and Flood Protection, was given technical support in the creation of a hydrodynamic model for the Danube and data collected by viadonau was made available.

Within viadonau, the projects "Dynamic LIFE Lines Danube - Reconnection of Spittelauer Arm and Haslau-Regelsbrunn", "Interreg Alpen Karpaten Fluss Korridor - Fischamündung", "Life Auenwildnis Wachau" and "Dam Breaking Scenario Wolfsthaler Damm" were supported with technical expertise.

The activity makes a substantial contribution to the implementation of measure
04. Promote innovations in waterway management of the Action Programme for the Danube 2022.