Germany, Herne city flood preparedness (2020-02-11)

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Activation date: 2020-02-11 <br>
Event type: Other <br>
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Activation reason: <br>
This is an exceptional activation of the Risk and Recovery Mapping Service as the analysis does not represent the actual risk assessment, but has been defined by the needs of an exercise planned on 1 April 2020 by the fire-brigade and civil protection command team of the German city of Herne.The simulated scenario consists of a flooding event occurred in Herne due to high water levels of the Emscher river, caused by heavy rainfall over the German cities of Dortmund and Castrop-Rauxel. The southern through wall of the Emscher is damaged at the point: 51.551 N 7.140 E, and breaks at 08.00 a.m. This moment will be considered as the starting point for the exercise. Parts of Herne are instantaneously flooded. Particularly, all areas below 40 m a.s.l may be fully flooded. On the contrary, the northern areas with respect to the Emscher river remain unaffected.The aim of this CEMS Risk and Recovery Standard activation is to provide the fire-brigade and civil protection command team of the German city of Herne with the modelled flood extent (i.e. P05 - Modelled Flood extent for major events) to be used during the planned exercise.Proposed solution and resultsFigure 1 shows the Modelled flood extent for major events map obtained from the hydraulic modelling, while Figure 2 shows a zoom of the position in which the breakage of the banks is assumed. The maximum water depth estimated for the AOI is 6.5m.Figure 1: modelled flood overview.    Figure 2: zoom on location of the rupture of the weir. <br>
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