Integrated Simulations

Combining simulation, visualization, and analysis in one tool to support decision making.

Research Priorities

Decision support in the environmental domain is often based on simulating phenomena of interest by means of numerical models. For example, disaster management relies on the simulation of catastrophes such as floods or droughts to estimate the local risk and damage. Construction planners employ agent-based simulations to investigate possible evacuation procedures. A simulation is an intricate computational process, and its complexity must be hidden from the user behind intuitive visual interfaces. To achieve this, the Integrated Simulations group aims for a tight integration of simulation, analysis, and visualisation in one software tool called Visdom.

The key to successful decision support is the ability to test and explore alternative options. Users are able to pose "What if" questions to the system, for example, "What happens if a levee breach occurs?", "Does it make sense to install mobile protection barriers next to the hospital?", or "Can we guarantee the completion of all barriers in time if we employ 30 workers and two trucks?". In Visdom, the synergy of modules for simulation, analysis, and visualization provides the user with the answers to such questions. In dedicated visual representations, users can observe the effects of their decisions, for example, a flood extent or an expected damage to important infrastructure.

Our most advanced application concerns flood and stormwater events. It uses a GPU-based inhouse 2D shallow water solver in combination with a sewer network simulation to model different hydrodynamic phenomena. Apart from that, we are working on the integration and coupling of simulation models for rainfall-runoff computation, logistics, and agent-based models for pedestrians and traffic to provide broader applicability of our generic decision support in the environmental domain.


  • Integrating Simulation and Visualization
  • Geospatial Decision Support
  • Disaster Management
  • Visualization Systems
  • Flood Simulation


Behind our smart solutions and software are smart and driven people.
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Key Publications

I. Schwerdorf, H. Werker, J. Waser (2018): Der Kölner Weg der Überflutungsvorsorge.
Korrespondenz Wasserwirtschaft 2/2018.

D. Cornel, A. Konev, B. Sadransky, Z. Horváth, A. Brambilla, I. Viola, J. Waser (2016): Composite Flow Maps.
in Computer Graphics Forum.

Z. Horvath, Rui. A. P. Perdigão, J. Waser, D. Cornel, A. Konev, G. Blöschl (2016): Kepler Shuffle for Real-World Flood Simulations on GPUs.
International Journal of High Performance Computing.

Daniel Cornel, Artem Konev, Bernhard Sadransky, Zsolt Horváth, Eduard Gröller, Jürgen Waser (2015): Visualization of Object-Centered Vulnerability to Possible Flood Hazards.
Computer Graphics Forum (Proceedings EuroVis 2015), 34(3), pages 331-341, 2015.
Best Paper Award, 3rd place

Decision Support Software-Plattform Visdom

Visdom is a software that combines visualization, simulation, and analysis techniques to assist decision making in the geospatial domain. The most prominent application concerns flood management where users can explore different flood and storm water scenarios and test various protection measures -

Videos about Visdom in English

Videos about Visdom in German

Download information material about Visdom


  • Scientific Partners: Institute of Hydraulic Engineering and Water Resources Management, TU Vienna, RWTH Aachen
  • Application Partners: Stadtentwässerungsbetriebe Köln (AöR), RIOCOM – Ingeneurbüro für Kulturtechnik und Wasserwirtschaft DI Albert Schwingshandl

Current Projects

Former Projects