When a flood is about to happen, authorities need to make decisions concerning the management and evacuation strategies to apply. However, in order to prepare evacuation plans or to assess potential damage, information is needed on inundation patterns, including water depths, flow velocities and timing of inundation. These types of information are also required for long-term planning of flood risk management and are necessary to comply with the directive 2007/60/EC of the European Parliament and of the Council of 23 October 2007 on the assessment and management of flood risks, click here for more information.
In many countries floods do not happen very often. But this implies that the information on what is likely to happen during a flood is scarce. Another way to derive information on expected flood extent, water depth and flow velocities is by using inundation models.
For non experienced modellers it is often difficult to determine what type of model they should apply. And even if the right model choice is made, it can remain difficult to apply the model in a proper way. Questions that often arise concern the grid cell size to be used in case of a 2D model, the processes that should be included (such as breach growth, wind effects and evaporation), or the best way to schematise a complex area.
The main objective of Task 8 therefore is to provide guidance on:
- the type of inundation model that should be applied depending on the type of area under investigation and amount and accuracy of the available input data;
- how the models should be applied properly.
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