Ingår i VTI 2011.0119. Plac: Expeditionen, referensmärkta samlingsverk

In this study, three events/processes that can cause flooding of roads are considered: - Water accumulates in depressions due to lack of capacity in the drainage system (or perhaps lack of drainage system at all!). The contributing drainage areas can be upstream catchments, as well as direct drainage from the road - The flooding of rivers, caused by insufficient downstream capacity - Flooding of low lying areas by rising sea level In this study we present a method which can identify flood sensitive areas in the road network. We refer to these as blue spots and they are defined as areas where flooding is expected to take place in case of extreme rainfall. The blue spots can be identified on the basis of previous experience, but new spots will appear on the road network, when precipitation increases. The analysis is divided into three levels where each level helps to provide a better overview of the actual flood risk. As knowledge increases gradually, the numbers of risk areas are reduced. Alternative URL: http://fudinfo.trafikverket.se/fudinfoexternwebb/Publikationer/Publikationer_001201_001300/Publikation_001246/Report_3_The_Blue_Spot_Model%5b1%5d.pdf