Preprints
https://doi.org/10.5194/nhess-2021-8
https://doi.org/10.5194/nhess-2021-8

  09 Feb 2021

09 Feb 2021

Review status: a revised version of this preprint is currently under review for the journal NHESS.

Bangladesh's vulnerability to cyclonic coastal flooding

Aurélia Bernard1,2,6, Nathalie Long1, Mélanie Becker1, Jamal Khan3,4, and Sylvie Fanchette5 Aurélia Bernard et al.
  • 1LIENSs, La Rochelle Université - CNRS, 2 rue Olympe de Gouges, 17000 La Rochelle, France
  • 2CERG-C Coordination, Faculty of Earth Sciences, University of Geneva - Rue des Maraîchers 13, 1205 Geneva, Switzerland
  • 3LEGOS, Université de Toulouse - CNRS - IRD - UPS - CNES,14 avenue Edouard Belin 31400 Toulouse, France
  • 4IWFM/BUET, Dhaka, Bangladesh
  • 5CESSMA, IRD, Paris Diderot University, 8 Paul Ricœur Square, 75013 Paris, France
  • 6ESPACE, Avignon Université, CNRS, Campus Hannah Arendt, 74 rue Louis Pasteur, 84000 Avignon, France

Abstract. In the Ganges-Brahmaputra-Meghna delta, covering most of Bangladesh, more than 165 million people live in low-lying coasts facing major extreme climatic events, such as cyclones. This article reviews the current scientific literature publications (2007–2020) in order to define vulnerability in the context of coastal Bangladesh facing cyclonic flooding. Based on this review, a new metric, called socio-spatial vulnerability index (SSVI), is defined as function of both the probability of the cyclonic flood hazard and the sensitivity of delta inhabitants. The main result shows that the districts of Shariatpur, Chandpur and Barisal situated in the tidal floodplain of the Ganges-Brahmaputra-Meghna delta, are in the fourth quartile, i.e. highest category. These districts are very densely populated (from 870 up to 1400 inhabitants/km2) and exposed to inundation hazards, and host a large number of vulnerability factors. Finally, the delta's mouth was identified as a very vulnerable area to cyclonic flooding.

Aurélia Bernard et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on nhess-2021-8', Anonymous Referee #1, 02 Mar 2021
    • AC1: 'Reply on RC1', Nathalie Long, 16 Apr 2021
  • RC2: 'Comment on nhess-2021-8', Anonymous Referee #2, 22 Mar 2021
    • AC2: 'Reply on RC2', Nathalie Long, 16 Apr 2021

Aurélia Bernard et al.

Aurélia Bernard et al.

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Short summary
This article reviews the current scientific literature publications in order to define the vulnerability in the context of coastal Bangladesh facing cyclonic flooding. A new metric, called socio-spatial vulnerability index, is defined as function of both the probability of the cyclonic flood hazard and the sensitivity of delta inhabitants. The main result shows that three very densely populated districts, located in the Ganges delta tidal floodplain, are highly vulnerable to cyclonic flooding.
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