Atlas of Flood Maps

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EU Flood Risk Maps Q4310 September, 2007 Examples from EU countries WL | Delft Hydraulics Figure 4.19 Landcover flooded for events with a return period of 1000 years Figure 4.20 Damage map for events with a return period of 1000 years Naselja = settlements 4—17
EU Flood Risk Maps Q4310 September, 2007 Examples from EU countries WL | Delft Hydraulics Figure 4.21 Overview of expected extent of flooded area for various return periods Comments on the maps Although the overview map of the Krapina basin (Figure 4.16) is very nice from a cartographic point of view, it lacks a legend and as such it is not very informative. Similarly the two maps of the expected flood extension for return periods of 5 and 1000 years (resp. Figure 4.17 and Figure 4.18) do evidently show the difference flooded area, but lack background information, e.g. a subset of the information provided on the overview map. On the other hand the map showing the expected flooded area for various return periods (5, 10, 25, 50, 100 and 1000 years) does have a reasonable background, although in fact it only shows the basin limits and the drainage pattern. The information provided is difficult to judge as there is no clear measuring rod to read the actual difference between the flooded areas for the various return periods. It does show very neatly the difference in flooded area between the upper basin (very large) and lower basin (relatively small), but this is simply a function of the size of those subbasins. It would be interesting to show the relative inundated area, i.e. as percentage of the total basin area. 4—18
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Atlas of Flood Maps

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