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The Yew Disaster Severity Index: A New Tool in Disaster Metrics

Published online by Cambridge University Press:  02 January 2019

Ying Ying Yew ,
Rafael Castro Delgado ,
David James Heslop  and
Pedro Arcos González
Ying Ying Yew*
Affiliation:
Universidad De Oviedo-Campus El-Cristo, Unit for Research in Emergency and Disaster, Faculty of Medicine, Oviedo, Spain
Rafael Castro Delgado
Affiliation:
Universidad De Oviedo-Campus El-Cristo, Unit for Research in Emergency and Disaster, Faculty of Medicine, Oviedo, Spain
David James Heslop
Affiliation:
University of New South Wales, School of Public Health and Community Medicine, Sydney, New South Wales, Australia
Pedro Arcos González
Affiliation:
Universidad De Oviedo-Campus El-Cristo, Unit for Research in Emergency and Disaster, Faculty of Medicine, Oviedo, Spain
*
Correspondence: Ying Ying Yew, RN, MPH Universidad De Oviedo-Campus El-Cristo Unit for Research in Emergency and Disaster Faculty of Medicine ES E-33006 Oviedo, Spain E-mail: ying.purelotus@gmail.com
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Abstract

Objectives

The Richter Scale measures the magnitude of a seismic occurrence, but it does not feasibly quantify the magnitude of the “disaster” at the point of impact in real humanitarian needs, based on United Nations International Strategy for Disaster Reduction (UNISDR; Geneva, Switzerland) 2009 Disaster Terminology. A Disaster Severity Index (DSI) similar to the Richter Scale and the Mercalli Scale has been formulated; this will quantify needs, holistically and objectively, in the hands of any stakeholders and even across timelines.

Background

An agreed terminology in quantifying “disaster” matters; inconsistency in measuring it by stakeholders posed a challenge globally in formulating legislation and policies responding to it.

Methods

A quantitative, mathematical calculation which uses the median score percentage of 100% as a baseline, indicating the ability to cope within the local capacity, was used. Seventeen indicators were selected based on the UNISDR 2009 disaster definition of vulnerability and exposure and holistic approach as a pre-condition. The severity of the disaster is defined as the level of unmet needs. Thirty natural disasters were tested, retrospectively, and non-parametric tests were used to test the correlation of the DSI score against the indicators.

Results

The findings showed that 20 out of 30 natural disasters tested fulfilled the inability to cope, within local capacity in disaster terminology. Non-parametric tests showed that there was a correlation between the 30 DSI scored and the indicators.

Conclusion

By computing a median fit percentage score of 100% as the ability to cope, and the correlation of the 17 indicators, in this DSI Scale, 20 natural disasters fitted into the disaster definition. This DSI will enable humanitarian stakeholders to measure and compare the severity of the disaster objectively, as well as enable future response to be based on needs.

YewYY, Castro DelgadoR, HeslopDJ, Arcos GonzálezP. The Yew Disaster Severity Index: A New Tool in Disaster Metrics. Prehosp Disaster Med. 2019;34(1):8–19.

Keywords

disaster severity scoreexposurehazardnatural disastervulnerability
Type
Original Research
Information
Prehospital and Disaster Medicine , Volume 34 , Issue 1 , February 2019 , pp. 8 - 19
Copyright
© World Association for Disaster and Emergency Medicine 2019 

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Footnotes

Conflicts of interest: none

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