Debris and hyper-concentrated flows are among the most destructive of all water related disasters. They affect both rural and urban areas in a wide range of morpho-climatic environments, and in recent years have attracted more and more attention from the scientific and professional communities and concern from the public due to the death toll they claim. The increased frequency of these natural hazards, coupled with climatic change predictions and urban development, suggests that they are set to worsen in the future. This book contains the edited versions of the papers presented at the third International conference on Monitoring, Simulation, Prevention and Remediation of Dense and Debris Flow. The Conference brought together engineers, scientists and managers from across the globe to discuss the latest scientific advances in the field of dense and hyper-concentrated flows, as well as to improve models, assess risk, develop hazard maps based on model results and to design prevention and mitigation measures. The papers have been organised into the following sections: Debris Flow Modelling; Debris Flow Triggering; Risk Assessment and Hazard Mitigation; Sediment Transport and Debris Flow Monitoring & Analysis.