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Cost–benefit analysis of flood mitigation measures: a case study employing high-performance hydraulic and damage modelling

Author

Listed:
  • Daniela Molinari

    (Politecnico di Milano)

  • Susanna Dazzi

    (University of Parma)

  • Edoardo Gattai

    (Politecnico di Milano)

  • Guido Minucci

    (Politecnico di Milano)

  • Giulia Pesaro

    (Politecnico di Milano)

  • Alessio Radice

    (Politecnico di Milano)

  • Renato Vacondio

    (University of Parma)

Abstract

This paper shows a detailed, advanced procedure to implement cost–benefit analyses (CBAs) in order to assess the effectiveness of flood mitigation measures. The town of Lodi (North of Italy) has been selected as a case study for the research work, as it was hit by a large flood in 2002 for which several data are available. In order to compute the benefits, in terms of avoided damage with the mitigation measure in place, micro-scale damage models developed within the Flood-IMPAT + project were used. The great amount of input data for such models comes from results of a two-dimensional river modelling, for what concern the hazard parameters, and from open-source database, to evaluate the vulnerability and the exposure of the hit area. The research highlights that technological-advanced, high-performance hydraulic models allow taking into account a variety of hazard scenarios, with reasonable computational time, supporting the proper accounting of the probabilistic nature of risk in CBAs. Nonetheless, such high-resolution tools support the implementation of micro-scale damage assessment models, which can provide information on the distribution of benefits in the investigated area, increasing the effectiveness of CBAs for policy making.

Suggested Citation

  • Daniela Molinari & Susanna Dazzi & Edoardo Gattai & Guido Minucci & Giulia Pesaro & Alessio Radice & Renato Vacondio, 2021. "Cost–benefit analysis of flood mitigation measures: a case study employing high-performance hydraulic and damage modelling," 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. 108(3), pages 3061-3084, September.
    • Handle: RePEc:spr:nathaz:v:108:y:2021:i:3:d:10.1007_s11069-021-04814-6
    DOI: 10.1007/s11069-021-04814-6
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    References listed on IDEAS

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    1. Independent Evaluation Group, 2010. "Cost-Benefit Analysis in World Bank Projects," World Bank Publications - Books, The World Bank Group, number 2561, December.
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    4. World Bank, 2010. "Cost-Benefit Analysis in World Bank Projects," World Bank Publications - Reports 10481, The World Bank Group.
    5. Brouwer, Roy & van Ek, Remco, 2004. "Integrated ecological, economic and social impact assessment of alternative flood control policies in the Netherlands," Ecological Economics, Elsevier, vol. 50(1-2), pages 1-21, September.
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