IsHUW
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| The increase of the frequencies and
dimensions of flood events is often claimed to be caused by human
interventions. Namely direct influences on the processes of
runoff accumulation and runoff concentration (surface
sealing, land use) or processes of wave modification in
rivers (reduction of retention areas, embankments, lean
river design and bank reinforcement) are mentioned. The project IsHUW was commissioned by ATV-DVWK to validate those statements. This is realized by developing cause-and-effect relations, based on model-based sensitivity analysis. Discharge variations of real and synthetic catchment areas are analyzed using hydrological and hydraulical models and the results are generalized by a statistical model. |
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Home-made floods? What's the influence of
land use? Modify land use (max. 15%), the size of the catchment area and surface elevation. As results you will get changes of the flood peak discharge for minimum and maximum areal precipitation (NG) for different recurrence intervals T (in years). NGMin(T) is the lower bound of expected areal precipitation in Germany with a recurrence interval of T years. NGMax(T) is the upper bound. The results are valid approximately for catchment areas with a size between 100 to 10000 km². |
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