Forewarned is forearmed: understanding multihazard risk assessment methods for disaster risk reduction and for increasing disaster preparedness

Winson, Annie; Smith, Kay; Leeming, Kathryn; Valters, Declan; Ciurean, Roxana. 2023 Forewarned is forearmed: understanding multihazard risk assessment methods for disaster risk reduction and for increasing disaster preparedness. [Lecture] In: 59th CCOP Annual Session, Phang Nga, Thailand, 29 Oct - 3 Nov 2023. (Unpublished)

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Abstract/Summary

Recent years have demonstrated that changing climate is likely to increase the frequency and impacts of complex multihazard events. There is therefore a pressing need to develop methodologies to comprehensively assess the interactions between hazard, exposure and vulnerability that create multihazard risk assessments. Due to the character of many natural hazard events and the paucity of data in inventories, purely quantitative (statistically driven) methods can be challenging to support consequently many multihazard risk approaches have been more qualitative in nature. We present an overview of a new open-source python toolbox that can generate a compounding multi-hazard risk assessment at national scale in a semi-quantitative manner. The toolbox works by: 1) Creating an index value to allow for the combination of hazard footprints and impacts data for: Flood, Earthquake, Landslide and Volcanic eruptions, 2) Identifying the factors that affect the exposure and vulnerability of buildings to these specific hazards, 3) Calculating of the vulnerability of individual buildings within hazard zones, 4) Applying weights for each building type to express the potential vulnerability of individual buildings to a specific hazard to generate relative single hazard vulnerability maps and then 5) Combining these single hazard ‘relative vulnerability maps’ to generate a multi-hazard vulnerability map which is weighted to reflect single hazard frequencies. This toolbox and the methodologies that support it have been deployed in work the BGS has conducted in Nepal, Tanzania, Brazil and Colombia and is the basis of new collaborations with organizations in the Philippines and Indonesia. We will present an overview of selected use cases to demonstrate how these tools can support DRR and disaster preparedness. Keywords: Geoscience, SE Asia, CCOP, Thematic Session

Item Type:	Publication - Conference Item (Lecture)
Additional Keywords:	IGRD
Date made live:	17 Jan 2024 12:00 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/536668

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