Abstract
The awareness of pluvial (rain-related) flood risk has grown significantly in the past few years but pluvial flooding is not handled with the same intensity throughout Europe. A variety of methods and modelling technologies are used to assess pluvial flood hazard and risk and to develop suggestions for flood mitigation measures. A brief overview of current model approaches is followed by the description of a modelling methodology that has been developed throughout the last 15 years with the focus on processing large scale areas. Experiences from several projects show that only high quality models of whole catchment areas yield results with enough accuracy to gain credibility among stakeholders, planners and the public. As a best practice example shows, the model approach also helps to plan effective decentral flood protection measures. To ensure successful flood risk management, a long-term preservation of flood risk awareness among local authorities and the public is necessary.
Highlights
The growing interest in pluvial flooding over the last 10 years has resulted in a number of pilot studies and research projects to assess pluvial flood hazard and risk in a number of European countries (e.g. URBAS 2008 [1])
The works range from small scale research studies using complex models and high resolution data [2] to large scale hazard and risk mapping [3]
Besides the fact that there is no common standard concerning the content and underlying methodology of pluvial flood hazard and risk maps, there are considerable differences regarding the efforts in European countries to deal with pluvial flooding
Summary
The growing interest in pluvial flooding over the last 10 years has resulted in a number of pilot studies and research projects to assess pluvial flood hazard and risk in a number of European countries (e.g. URBAS 2008 [1]). The works range from small scale research studies using complex models and high resolution data [2] to large scale hazard and risk mapping [3]. Besides the fact that there is no common standard concerning the content and underlying methodology of pluvial flood hazard and risk maps, there are considerable differences regarding the efforts in European countries to deal with pluvial flooding. Starting with a brief discussion of the societal and political context, the main focus of this paper is to provide an insight into experiences with pluvial flood risk management in Germany, highlighting the following aspects: x an evaluation of different modelling approaches to support hazard and risk mapping as well as planning of flood mitigation x prospects and challenges in the planning and implementation of flood mitigation measures x conclusions drawn from various pluvial flood risk management processes
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