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Cost–benefit analysis of flood-zoning policies: A review of current practice

Hudson, PaulORCIDiD
Botzen, W. J. Wouter
DOI: https://doi.org/10.1002/wat2.1387
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9254
Hudson, Paul; Botzen, W. J. Wouter, 2019: Cost–benefit analysis of flood-zoning policies: A review of current practice. In: Wiley Interdisciplinary Reviews: Water, Band 6, 6, DOI: 10.1002/wat2.1387.
 
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  • Abstract
One commonly proposed method to limit flood risk is land-use or zoning policies which regulates construction in high-risk areas, in order to reduce economic exposure and its vulnerability to flood events. Although such zoning regulations can be effective in limiting trends in flood risk, they also have adverse impacts on society, for instance by limiting local development of areas near the water. In order to judge whether proposed land-use or zoning policies are a net benefit to society, they should be accepted or rejected based on a societal cost–benefit analysis (CBA). However, conducting a CBA of zoning regulation is complex and comprehensive guidelines of how to do such an analysis are lacking. We offer guidelines for good practice. In order to assess the costs and benefits of zoning as a climate change adaption strategy, they should be assessed at a societal level in order to account for public good features of flood risk reduction strategies, and because costs in one area can be benefits in another region. We propose a multistep process: first, determine the spatial extent of the zoning policy and how interconnected the zoned area is to other locations; second, conduct a CBA using monetary costs and benefits estimated from an integrated hydro-economic model to investigate if total benefits exceed total costs; third, conduct a sensitivity analysis regarding the main assumptions; fourth, conduct a multicriteria analysis (MCA) of the normative outcomes of a zoning policy. A desirable policy is preferred in both the CBA and MCA. This article is categorized under: Engineering Water > Planning Water Human Water > Value of Water Science of Water > Water Extremes Human Water > Methods
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  • Montanwesen, Energie, Ressourcen, Umwelt [302]
Subjects:
climate change adaptation
cost–benefit analysis
flood
risk reduction
spatial planning
zoning
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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