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The Asynergies of Structural Disaster Risk Reduction Measures: Comparing Floods and Earthquakes

de Ruiter, Marleen C.; de Bruijn, Jens A.; Englhardt, Johanna; Daniell, James E.; de Moel, Hans; Ward, Philip J.

Abstract:
Traditionally, building‐level disaster risk reduction (DRR) measures are aimed at a single natural hazard. However, in many countries the society faces the threat of multiple hazards. Building‐level DRR measures that aim to decrease earthquake vulnerability can have opposing or conflicting effects on flood vulnerability, and vice versa. In a case study of Afghanistan, we calculate the risk of floods and earthquakes, in terms of average annual losses (AAL), in the current situation. Next, we develop two DRR scenarios, where building‐level measures to reduce flood and earthquake risk are implemented. We use this to identify districts for which DRR measures of one hazard increase the risk of another hazard. We then also calculate the optimal situation between the two scenarios by, for each district, selecting the DRR scenario for which the AAL as a ratio of the total exposure is lowest. Finally, we assess the sensitivity of the total risk to each scenario. The optimal measure differs spatially throughout Afghanistan, but in most districts it is more beneficial to take flood DRR measures. However, in the districts where it is more beneficial to take earthquake measures, the reduction in risk is considerable (up to 40%, while flood DRR measures lead to a reduction in risk by 16% in individual districts). ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000129856
Veröffentlicht am 05.03.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Geophysikalisches Institut (GPI)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2021
Sprache Englisch
Identifikator ISSN: 2328-4277
KITopen-ID: 1000129856
Erschienen in Earth's future
Verlag Wiley Open Access
Band 9
Heft 1
Seiten e2020EF001531
Schlagwörter asynergies; building back better; DRR Measures; multi‐hazard risk assessment; sustainable development
Nachgewiesen in Scopus
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