A generic physical vulnerability model for floods: review and concept for data-scarce regions

Malgwi, Mark Bawa; Fuchs, Sven; Keiler, Margreth (2020). A generic physical vulnerability model for floods: review and concept for data-scarce regions. Natural hazard and earth system science, 20(7), pp. 2067-2090. Copernicus Publications 10.5194/nhess-20-2067-2020

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The use of different methods for physical flood vulnerability assessment has evolved over time, from traditional single-parameter stage–damage curves to multi-parameter approaches such as multivariate or indicator-based models. However, despite the extensive implementation of these models in flood risk assessment globally, a considerable gap remains in their applicability to data-scarce regions. Considering that these regions are mostly areas with a limited capacity to cope with disasters, there is an essential need for assessing the physical vulnerability of the built environment and contributing to an improvement of flood risk reduction. To close this gap, we propose linking approaches with reduced data requirements, such as vulnerability indicators (integrating major damage drivers) and damage grades (integrating frequently observed damage patterns). First, we present a review of current studies of physical vulnerability indicators and flood damage models comprised of stage–damage curves and the multivariate methods that have been applied to predict damage grades. Second, we propose a new conceptual framework for assessing the physical vulnerability of buildings exposed to flood hazards that has been specifically tailored for use in data-scarce regions. This framework is operationalized in three steps: (i) developing a vulnerability index, (ii) identifying regional damage grades, and (iii) linking resulting index classes with damage patterns, utilizing a synthetic “what-if” analysis. The new framework is a first step for enhancing flood damage prediction to support risk reduction in data-scarce regions. It addresses selected gaps in the literature by extending the application of the vulnerability index for damage grade prediction through the use of a synthetic multi-parameter approach. The framework can be adapted to different data-scarce regions and allows for integrating possible modifications to damage drivers and damage grades.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography > Physical Geography > Unit Geomorphology
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Geography
08 Faculty of Science > Institute of Geography > Physical Geography

UniBE Contributor:

Malgwi, Mark Bawa and Keiler, Margreth

Subjects:

900 History > 910 Geography & travel

ISSN:

1684-9981

Publisher:

Copernicus Publications

Projects:

[245] Mobiliar Lab für Naturrisiken Official URL

Language:

English

Submitter:

Mira Maria Schär

Date Deposited:

01 Sep 2020 16:50

Last Modified:

01 Sep 2020 16:50

Publisher DOI:

10.5194/nhess-20-2067-2020

BORIS DOI:

10.7892/boris.146069

URI:

https://boris.unibe.ch/id/eprint/146069

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