Using graphs to find economically optimal safety targets for multiple lines of flood defences

Other literature type English OPEN
Dupuits, Egidius Johanna Cassianus ; Diermanse, Ferdinand Lennaert Machiel ; Kok, Matthijs (2017)
  • Journal: (issn: 1684-9981, eissn: 1684-9981)
  • Related identifiers: doi: 10.5194/nhess-2017-12
  • Subject:
    acm: ComputerApplications_COMPUTERSINOTHERSYSTEMS

Flood defences can be designed as multiple lines of defence. This paper presents an approach for finding an optimal configuration for flood defence systems, based on an economic cost-benefit analysis with an arbitrary number of interdependent lines of defence. The proposed approach is based on a graph algorithm and is, thanks to some beneficial properties of the application, able to traverse large problems. A number of case studies were carried out to compare the optimal paths found by the proposed approach with the results of competing methods, and were found to generate (near) identical results. The work presented here makes cost-benefit analyses of complex flood defence systems with interdependent multiple lines of defence both easier and applicable to a broad range of flood defence systems with multiple lines of defence.
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