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Techniques for valuing adaptive capacity in flood risk management

Research output: Contribution to journalJournal articlepeer-review

Published
  • Rachel Brisley
  • Richard Wylde
  • Rob Lamb
  • Jonathan Cooper
  • Paul Sayers
  • Jim Hall
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Article number1400070
<mark>Journal publication date</mark>04/2016
<mark>Journal</mark>Proceedings of the ICE - Water Management
Issue number2
Volume169
Number of pages10
Pages (from-to)75-84
Publication StatusPublished
Early online date28/09/15
<mark>Original language</mark>English

Abstract

Flood and coastal erosion risk management has always faced the challenge of decision making in the face of multiple uncertainties relating to the climate, the economy and society. Traditionally, this has been addressed by adopting a precautionary approach that seeks to protect against a reasonable worst case. However, a managed adaptive approach can offer advantages. The benefits include improved resilience to negative changes, enabling opportunities from positive changes and greater cost effectiveness. The absence of clear methods and tools to value adaptive approaches has been recognised as an obstacle to wider adoption. This paper proposes a staged approach to building in adaptive capacity, which systematically analyses uncertainties, identifies opportunities to incorporate adaptability and appraises benefits through the analysis of decision trees. A case study is presented. The methodology is set in the context of appraisal processes used in England by the Environment Agency, based on cost–benefit analysis guidance issued by HM Treasury. The approach is transferable to other situations worldwide, where decision making is based on quantified assessment of costs and benefits. The work should help decision makers fully appraise the benefits of building in adaptive capacity and make the economic and technical case for adaptive flood risk management in an uncertain environment.