Regional Flood Model for Germany

Flood risk analysis has traditionally been carried out at a local scale. There is, however, a need to identify flood prone areas and the associated risk at a national scale so that planning and resource allocation to undertake flood defence measures can be done in an effective way. Previously applied methodologies have considerable drawbacks that should be overcome. These include an assumption of the uniform flood magnitude countrywide for one scenario, application of steady state instead of dynamic hydraulic modelling approaches as well as disregarding of flood protection structures and their possible failures. The aim of this project is to develop a modelling system to produce a coherent regional flood risk assessment covering the whole of Germany. The system will consist of a chain of models covering the main processes of flood generation and damage.

A model chain for regional flood risk assessment in Germany.

The system consists of:  

  • a model for the generation of weather variables for the present climate and under future climate change scenarios.
  • a model for the simulation of land surface hydrological processes and estimation of runoff.
  • a model for the simulation of flow propagation in river channels and flood plain inundation with consideration of possible failures of flood defence structures.
  • a model for the estimation of damages resulting from flooding.

Through implementation of the developed system, changes in flood risk under climate change scenarios will be investigated. This will enable policy makers plan changes in the management strategy and level of investment for flood protection measures.

 

Publications

Falter, D., Schröter, K., Nguyen, D., Vorogushyn, S., Kreibich, H., Hundecha, Y., Apel, H., Merz, B. (2015): Spatially coherent flood risk assessment based on long-term continuous simulation with a coupled model chain. - Journal of Hydrology. doi.org/10.1016/j.jhydrol.2015.02.021

 

Falter, D., Nguyen, D., Vorogushyn, S., Schröter, K., Hundecha, Y., Kreibich, H., Apel, H., Theisselmann, F., Merz, B. (2014 online): Continuous, large-scale simulation model for flood risk assessments: proof-of-concept. - Journal of Flood Risk Management. doi.org/10.1111/jfr3.12105

 

Falter, D., Vorogushyn, S., Lhomme, J., Apel, H., Gouldby, B., Merz, B. (2013): Hydraulic model evaluation for large-scale flood risk assessments. - Hydrological Processes, 27, 9, p. 1331-1340

 

Hundecha, Y., Merz, B. (2012): Exploring the relationship between changes in climate and floods using a model-based analysis. - Water Resources Research, 48, W04512.

 

Nied, M., Hundecha, Y., Merz, B. (2013): Flood-initiating catchment conditions: a spatio-temporal analysis of large-scale soil moisture patterns in the Elbe River basin. - Hydrology and Earth System Sciences, 17, 4, p. 1401-1414.

Contact

Profile photo of  Dr. Sergiy Vorogushyn

Dr. Sergiy Vorogushyn
Hydrology

Telegrafenberg
Building C 4, room 2.04
14473 Potsdam
tel. +49 331 288-1338