Social resilience: how to evacuate people in case of multihazards contexts ? The case of evacuation management in New Brighton (Christchurch - New Zealand) - Ecole Nationale du Génie de l'Eau et de l'Environnement de Strasbourg Accéder directement au contenu
Communication Dans Un Congrès Année : 2015

Social resilience: how to evacuate people in case of multihazards contexts ? The case of evacuation management in New Brighton (Christchurch - New Zealand)

Résumé

Resilience and social issues are mainly focused on one hazard at a time. But recent studies highlighted that in a multihazards context, the management of the whole hazards can deeply modify the risks management policies. As part of the project ”Earthquake Flood Multi-hazard Impacts on Lifeline Systems following the Canterbury Earthquake sequence 2010-2011” (Christchurch - New Zealand), which is focused on the study of the lifelines systems after natural disasters, we have studied social issues and more precisely how the study of social resilience can be useful in multihazard management. Our study takes place in New Brighton (East of Christchurch). This area is frequently affected by several natural hazards, such as tsunamis, earthquakes or floods. Between 2010 and 2011, strong seismic sequences greatly distressed this region, followed, in 2014, by three episodes of extremes floods. In this multihazard and post-disasters contexts, our research is focused on the evacuation of people living in risky areas. The study of evacuation is then used as an indicator of social resilience. For that research, we have developed a model of evacuation by using the Multi-agent transport simulator (MATSim). Cars and pedestrian evacuations were simulated under different scenarios taking into account tsunami, tsunami/earthquake and floods (13 scenarios). In these scenarios we have also taking into account several displacement abilities of the population. In terms of results, our study provides important findings to settle an efficient evacuation plan of New Brighton area. The results highlight the most vulnerable areas for all the scenarios and point out the most problematic hazards or combination of hazards that we have simulated For instance, results show that for tsunamis or earthquakes’ scenarios, the whole population will not have enough time to evacuate properly this area. Finally, safety zones are suggested, shorter evacuation paths are calculated and a new evacuation plan is proposed.
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Dates et versions

hal-02602344 , version 1 (16-05-2020)

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C. Heitz, C Heaume. Social resilience: how to evacuate people in case of multihazards contexts ? The case of evacuation management in New Brighton (Christchurch - New Zealand). 13th International Symposium on Geo-disaster Reduction, Aug 2015, Praha, Czech Republic. ⟨hal-02602344⟩
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