Flood Risk Assessment in the Netherlands: A Case Study for Dike Ring South Holland

Sebastiaan N. Jonkman, Matthijs Kok and Johannes K. Vrijling

Risk Analysis, 2008, vol. 28, issue 5, 1357-1374

Abstract: Large parts of the Netherlands are below sea level. Therefore, it is important to have insight into the possible consequences and risks of flooding. In this article, an analysis of the risks due to flooding of the dike ring area South Holland in the Netherlands is presented. For different flood scenarios the potential number of fatalities is estimated. Results indicate that a flood event in this area can expose large and densely populated areas and result in hundreds to thousands of fatalities. Evacuation of South Holland before a coastal flood will be difficult due to the large amount of time required for evacuation and the limited time available. By combination with available information regarding the probability of occurrence of different flood scenarios, the flood risks have been quantified. The probability of death for a person in South Holland due to flooding, the so‐called individual risk, is small. The probability of a flood disaster with many fatalities, the so‐called societal risk, is relatively large in comparison with the societal risks in other sectors in the Netherlands, such as the chemical sector and aviation. The societal risk of flooding appears to be unacceptable according to some of the existing risk limits that have been proposed in literature. These results indicate the necessity of a further societal discussion on the acceptable level of flood risk in the Netherlands and the need for additional risk reducing measures.

Date: 2008
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https://doi.org/10.1111/j.1539-6924.2008.01103.x

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Persistent link: https://EconPapers.repec.org/RePEc:wly:riskan:v:28:y:2008:i:5:p:1357-1374

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