Mapping hazards from glacier lake outburst floods based on modelling of process cascades at Lake 513, Carhuaz, Peru
- 1Department of Geography, University of Zurich, Zurich, Switzerland
- 2Unidad de Glaciología y Recursos Hídricos, Autoridad Nacional de Agua, Huaraz, Peru
- 3Laboratoire de constructions hydrauliques, EPFL, Lausanne, Switzerland
- 4CREALP, Centre de recherche sur l'environnement alpin, Sion, Switzerland
Abstract. Recent warming has had enormous impacts on glaciers and high-mountain environments. Hazards have changed or new ones have emerged, including those from glacier lakes that form as glaciers retreat. The Andes of Peru have repeatedly been severely impacted by glacier lake outburst floods in the past. An important recent event occurred in the Cordillera Blanca in 2010 when an ice avalanche impacted a glacier lake and triggered an outburst flood that affected the downstream communities and city of Carhuaz. In this study we evaluate how such complex cascades of mass movement processes can be simulated coupling different physically-based numerical models. We furthermore develop an approach that allows us to elaborate corresponding hazard maps according to existing guidelines for debris flows and based on modelling results and field work.