Risk classification in Germany

The extent of risk depends on the estimated return period of flood events and the corresponding amount of possible consequences. High waterlevels do not necessarily cause severe damages as the impact or adverse effect strongly depends on the kind of land use and population density.

Risk zoning defines three different levels of risk: 

  • LOW
  • MEDIUM
  • HIGH

The zones are defined based on a specific hazard and expressed in terms of probability.

Based on GIS application the specific annual damage for each cell of the raster can be calculated. According to the calculated values a classification of risk is possible. To determine the thresholds of these three classes a zoning system of German insurance companies is used.


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Module
Flood Risk Assessment
Source

TUHH

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