Urban flooding in a changing climate

The main aim of the research is to investigate reasons for urban flooding and how different stormwater system designs such as pipe systems and open stormwater systems, in combination with green areas in the city, impact flooding under extreme precipitation.
The dissertation focuses on identification and analysis of critical precipitation events in different urban environments, which causes severe flooding. Methods to reduce consequences of the flooding should also be investigated. Existing data are used for statistical analysis. Altered precipitation characteristics and implications for design conditions are studied. The combined large precipitation and high receiving water level situations are related to the functioning of the sewer system. Urban runoff models are used for analysing events of high precipitation in combination with high receiving water levels. Critical situations are identified as those giving rise to severe flooding. Methods for handling the water during such situations should be sought for. The effect on downstream system of the different methods are assessed by looking at water balance and peak flow. Real systems are modelled.