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An integrated approach for evaluating the effectiveness of landslide risk reduction in unplanned communities in the Caribbean

Author

Listed:
  • Elizabeth Holcombe
  • Sarah Smith
  • Malcolm Anderson
  • Edmund Wright

    ()

Abstract

Despite the recognition of the need for mitigation approaches to landslide risk in developing countries, the delivery of ‘on-the-ground’ measures is rarely undertaken. With respect to other ‘natural’ hazards it is widely reported that mitigation can pay. However, the lack of such an evidence-base in relation to landslides in developing countries hinders advocacy amongst decision makers for expenditure on ex-ante measures. This research addresses these limitations directly by developing and applying an integrated risk assessment and cost-benefit analysis of physical landslide mitigation measures implemented in an unplanned community in the Eastern Caribbean. In order to quantify the level of landslide risk reduction achieved, landslide hazard and vulnerability were modelled (before and after the intervention) and project costs, direct and indirect benefits were monetised. It is shown that the probability of landslide occurrence has been substantially reduced by implementing surface-water drainage measures, and that the benefits of the project outweigh the costs by a ratio of 2.7 to 1. This paper adds to the evidence base that ‘mitigation pays’ with respect to landslide risk in the most vulnerable communities – thus strengthening the argument for ex-ante measures. This integrated project evaluation methodology should be suitable for adoption as part of the community-based landslide mitigation project cycle, and it is hoped that this resource, and the results of this study, will stimulate further such programmes.

Suggested Citation

  • Elizabeth Holcombe & Sarah Smith & Malcolm Anderson & Edmund Wright, 2011. "An integrated approach for evaluating the effectiveness of landslide risk reduction in unplanned communities in the Caribbean," The Centre for Market and Public Organisation 11/270, Department of Economics, University of Bristol, UK.
  • Handle: RePEc:bri:cmpowp:11/270
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    File URL: http://www.bristol.ac.uk/cmpo/publications/papers/2011/wp270.pdf
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    References listed on IDEAS

    as
    1. Jean Vaunat & Serge Leroueil, 2002. "Analysis of Post-Failure Slope Movements within the Framework of Hazard and Risk Analysis," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 26(1), pages 81-107, May.
    Full references (including those not matched with items on IDEAS)

    More about this item

    Keywords

    Landslide modelling; Risk assessment; Cost Benefit Analysis; Developing countries; Community;

    JEL classification:

    • D61 - Microeconomics - - Welfare Economics - - - Allocative Efficiency; Cost-Benefit Analysis
    • Q54 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Climate; Natural Disasters and their Management; Global Warming
    • Q58 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Environmental Economics - - - Environmental Economics: Government Policy

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