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Nat. Hazards Earth Syst. Sci., 16, 629-642, 2016
https://doi.org/10.5194/nhess-16-629-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
03 Mar 2016
Hazard interaction analysis for multi-hazard risk assessment: a systematic classification based on hazard-forming environment
Baoyin Liu1, Yim Ling Siu1, and Gordon Mitchell2 1School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
2School of Geography, University of Leeds, Leeds, LS2 9JT, UK
Abstract. This paper develops a systematic hazard interaction classification based on the geophysical environment that natural hazards arise from – the hazard-forming environment. According to their contribution to natural hazards, geophysical environmental factors in the hazard-forming environment were categorized into two types. The first are relatively stable factors which construct the precondition for the occurrence of natural hazards, whilst the second are trigger factors, which determine the frequency and magnitude of hazards. Different combinations of geophysical environmental factors induce different hazards. Based on these geophysical environmental factors for some major hazards, the stable factors are used to identify which kinds of natural hazards influence a given area, and trigger factors are used to classify the relationships between these hazards into four types: independent, mutex, parallel and series relationships. This classification helps to ensure all possible hazard interactions among different hazards are considered in multi-hazard risk assessment. This can effectively fill the gap in current multi-hazard risk assessment methods which to date only consider domino effects. In addition, based on this classification, the probability and magnitude of multiple interacting natural hazards occurring together can be calculated. Hence, the developed hazard interaction classification provides a useful tool to facilitate improved multi-hazard risk assessment.

Citation: Liu, B., Siu, Y. L., and Mitchell, G.: Hazard interaction analysis for multi-hazard risk assessment: a systematic classification based on hazard-forming environment, Nat. Hazards Earth Syst. Sci., 16, 629-642, https://doi.org/10.5194/nhess-16-629-2016, 2016.
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Short summary
We developed a systematic hazard interaction classification based on the geophysical environment that natural hazards arise from. This classification ensures all possible hazard interactions among different hazards are considered in multi-hazard risk assessment. Using the developed classification, the probability and magnitude of multiple natural hazards occurring simultaneously can then be modelled in order to provide a more comprehensive multi-hazard risk assessment.
We developed a systematic hazard interaction classification based on the geophysical environment...
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