Life Cycle Cost and Return on Investment as complementary decision variables for urban flood risk management in developing countries

Raffaele De Risi*, Francesco De Paola, Jane Turpie, Timm Kroeger

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

26 Citations (Scopus)
288 Downloads (Pure)

Abstract

Herein we investigate Life Cycle Cost (LCC) and Return on Investment (ROI) as potential decision variables for evaluating the economic performance (ROI) and financial feasibility (LCC) of a set of flood mitigation strategies over time. The main novelty of this work is the application of LCC and ROI analyses at the urban level to an asset portfolio of flood-prone buildings. Reduced flood damage is treated probabilistically as avoided costs (LCC analysis) and returns (ROI analysis), respectively. The proposed methodology is applied to the case of Dar es Salaam, Tanzania, which suffers severe riverine flooding on a sub-annual basis. Specifically, LCC and ROI of five mitigation scenarios that include large-scale catchment rehabilitation, settlement set-backs and waste management are compared with the current situation. The main result is that the highest-performing flood mitigation option includes both conventional interventions and ecosystem rehabilitation.

Original languageEnglish
Pages (from-to)88-106
Number of pages19
JournalInternational Journal of Disaster Risk Reduction
Volume28
Early online date21 Feb 2018
DOIs
Publication statusPublished - Jun 2018

Keywords

  • Flood risk mitigation
  • Sustainable urban drainage systems
  • Green urban development
  • Cost-effectiveness
  • Natural infrastructure
  • Dar es Salaam

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