The City of Greve - located south of Copenhagen along Koege Bay - has been hit by floods during the past few years and the City has initiated a number of activities aimed at reducing the flood problems. Climate change may lead to more frequent and more severe floods. In order to quantify these effects, City of Greve has carried out a study of likely future scenarios for extreme precipitation and water levels in the City. The objective of the project was to determine probable future extreme rain events and the associated effects in terms of local flooding in order that the City of Greve may include these predictions in the planning process.
The City of Greve has decided to spend significant resources on the study of floods because of the fact that the recent flood events have clearly shown that extreme rain events do happen more frequently now than in the past decades. The cause of this doesn't matter to the drainage authorities, but they are working diligently to handle the problems that are caused by the changed rain patterns.
For these reasons, City of Greve is applying the most modern technologies for the analysis of floods. Historical data and state-of-the-art computer models are applied in the analysis of the causes of the floods and in the identification of the most cost-effective solutions, which are then brought into the planning of extensions and improvements to the drainage system.
Simulation of flooding the city centre during a rain event corresponding to a 2100 climate scenario.