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Paradigm shift in engineering of pluvial floods: From historical recurrence intervals to risk-based design for an uncertain future

Författare:
  • Salar Haghighatafshar
  • Per Becker
  • Steve Moddemeyer
  • Andreas Persson
  • Johanna Sörensen
  • Henrik Aspegren
  • Karin Jönsson
Publiceringsår: 2020-06-06
Språk: Engelska
Publikation/Tidskrift/Serie: Sustainable Cities and Society
Volym: 61
Dokumenttyp: Artikel i tidskrift
Förlag: Elsevier

Abstract english

Precipitation is intrinsically associated with high uncertainty, which is exacerbated exponentially over time—especially concerning climate change. However, the current design practice in urban drainage infrastructure remains firmly bound to deterministic assumptions regarding the design load. This approach is too simplified—focusing only on the return period of the design event—and ignores the complexity of drainage systems and the potential changes in catchment hydrology and the at-risk valuable assets within. Therefore, the current design approach is inherently an unsustainable practice that cannot deal with extreme uncertainties associated with urban drainage and flood resilience in changing climate and society. This paper examines the current deterministic design practice and encourages a collective discussion on the need for a paradigm shift in the engineering of pluvial floods toward a risk-based design. We believe that adopting a risk-based design will partially address the uncertainty and complexity of climate and urban drainage, respectively, although a method for the new practice in a risk-based design paradigm must be developed.

Keywords

  • Infrastructure Engineering
  • pluvial floods
  • urban flood risk
  • drainage infrastructure
  • climate change
  • deterministic design
  • probabilistic design

Other

Published
  • Sustainable Urban Flood Management
  • ISSN: 2210-6707
E-post: andreas [dot] persson [at] nateko [dot] lu [dot] se

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