Cartography of population vulnerability to volcanic hazards and lahars of Mount Pinatubo (Philippines): a case study in Pasig-Potrero River basin (province of Pampanga) / Cartographie de la vulnérabilité des populations face aux phénomènes volcaniques et aux lahars du Mont Pinatubo (Philippines) : cas du bassin de la rivière Pasig-Potrero (province de Pampanga)

International audienceThis study aims at assessing the vulnerability of populations in the Pasig-Potrero River basin, who are threatened by the recurrent lahars of Mt Pinatubo volcano (Philippines) in the aftermath of its 1991 eruption. A survey, carried out between February and March 1998, enabled us to define and to map different levels of risk perception, the quality of potential behavioural patterns in the event of further lahars, and attitudes in the event of an evacuation order. It was then possible to work out a classification and to map the patterns of human vulnerability in the study area. This study points out that, while risk perception is quite high, some problems remain, notably concerning the warning systems and the behaviour of the population in the case of an evacuation. Theses results should assist in elaborating risk and disaster scenarios. They are intended to be used for operational purposes in crisis management such as the organization of disaster relief, and in land use planning