Cécile Saint-Marc

A Geographical Information System for mapping eruption risk at Piton de la Fournaise, Reunion Island

A brief history of the observation of Piton de la Fournaise central area.- Geodynamic setting of La Reunion Island.- The construction of La Reunion Island.- Geology and morphostructure of Piton de la Fournaise.- Erosion and volcaniclastic sedimentation at Piton de La Fournaise: from source to deep marine environment.- Magma paths at Piton de la Fournaise volcano.- Pre-historic explosive activity at Piton de la Fournaise volcano.- Fifteen years of intense eruptive activity (1998-2013) at Piton de La Fournaise volcano (La Reunion): A review.- Petrological and experimental constraints.- A review of the recent geochemical evolution of Piton de la Fournaise volcano, Reunion Island (1927-2010).- Magma degassing at Piton de la Fournaise volcano.- Static and dynamic seismic imaging of Piton de la Fournaise.- Seismic monitoring at Piton de la Fournaise.- Ground deformation at Piton de la Fournaise (La Reunion Island), a review from 20 years of GNSS monitoring.- The March-April 2007 eruptions of Piton de la Fournaise as recorded by interferometric data.- Contribution of tiltmeters and extensometers to monitor Piton de la Fournaise activity.- A Geographical Information System for mapping eruption risk at Piton de la Fournaise, Reunion Island.- Perception of risk for volcanic hazard in Indian Ocean: La Reunion Island case study.- Groundwater resources: Conceptual models.- The volcanism of the Comores archipelago integrated at a regional scale.- Structure and history of Karthala.- Geochemical and Petrological aspects of Karthala.- Groundwater prospection in Grande Comore Island - Joint contribution of geophysical methods, hydrogeological times-series analysis and groundwater modelling.- Volcanic risk and crisis management on Grande Comore island.Piton de la Fournaise, situated on La Reunion island, is one of the most active volcanoes in the world. It has been the subject of continuous surveillance since the start of the 1980s, in particular on account of the potential economic stakes. Spatial knowledge concerning the eruptive risk for the management of volcanic hazard is a major challenge. It requires knowledge of past events, and implies the need to relate different eruptive phenomena, such as lava flows, cones and fissures, and also earth tremors providing warning signs for eruption. Geographical Information Systems (GIS) are widely recognised for the management of spatial data and natural hazard mapping. This chapter thus sets out to presents the different stages in the design of the GIS developped in the Observatoire Volcanologique du Piton de la Fournaise, and its interest in the spatial analysis of volcanic hazard.

A Geographical Information System for Mapping Eruption Risk at Piton de la Fournaise

Piton de la Fournaise, situated on La Reunion Island, is one of the most active volcanoes in the world. It has been the subject of continuous surveillance since the start of the 1980s, in particular on account of the potential economic stakes. Spatial knowledge concerning the eruptive risk for the management of volcanic hazard is a major challenge. It requires knowledge of past events, and implies the need to relate different eruptive phenomena, such as lava flows, cones and fissures, and also earth tremors providing warning signs for eruptions. Geographical Information Systems (GIS) are widely recognised for the management of spatial data and natural hazard mapping. This chapter thus sets out to present the different stages in the design of the GIS developed in the Observatoire Volcanologique du Piton de la Fournaise, and its interest in the spatial analysis of volcanic hazard.