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Risk-based benefit assessment of coastal cliff protection

Lookup NU author(s): Professor Jim Hall, Mark Lee


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Cliff protection schemes are designed to reduce the risk of damage or permanent loss of cliff-top assets as a result of coastal cliff recession and landsliding, To identify the most efficient scheme in economic terms requires an assessment of the beneficial risk reduction that each of the scheme options will achieve. This paper introduces a risk-based approach to evaluating the economic benefits of coastal cliff protection. The approach is applicable to economic appraisal of schemes for currently protected and unprotected coastal sites. Example appraisals of sites prone to progressive cliff recession, large catastrophic landslides and minor recurrent ground movement are included. Methods for including and structuring expert judgements of failure probabilities are explored. A risk-based approach is preferable to current practice, which is essentially deterministic, because it reflects the uncertainty that is inherent in recession predictions, Current deterministic methods can underestimate the economic risk associated with cliff recession.

Publication metadata

Author(s): Hall JW, Lee EM, Meadowcroft IC

Publication type: Article

Publication status: Published

Journal: Proceedings of the Institution of Civil Engineering - Water and Maritime Engineering

Year: 2000

Volume: 142

Issue: 3

Pages: 127-139

ISSN (print): 1472-4561

ISSN (electronic): 1753-7800

Publisher: ICE Publishing