Flooding – Vulnerability of vulnerable objects after dike breaking (2019)

This map shows the vulnerability of objects due to the most conceivable flooding caused by breakthroughs through both the primary and regional water systems. The maximum water depth from the maps “flood image primary” and “flood image regional” is compared to the floor level per object. This floor level is derived from the AHN2 and AHN3 (height around the object). If the maximum water depth is higher than the floor level, there is a risk of water inflow, causing damage to the object. The following classification is made using the height of the water against the facade of the object in the event of a flood: No water depth against facade (Object is not vulnerable); » Between 0 and 0.2 meters of water depth against facade (Before the water flows in, it must cross the threshold.); » Between 0.2 and 0.5 meters of water depth against facade (Socket sockets are often 30 centimeters above the threshold); » Between 0.5 and 2.0 metres of water depth against facade; » More than 2.0 meters water depth against facade. The locations of the vulnerable objects are outdated via the Risk Card and linked to a building. If the location of a vulnerable object could not be linked to a BAG building, a building was searched for in a perimeter of 50 meters around the vulnerable object. For vulnerable objects that lie outside these 50 meters, the water depth against facade could not be determined and have the classification: Not being vulnerable/other.