This book contains papers presented at the First International Conference on Monitoring, Simulation, Prevention and Remediation of Dense and Debris Flows. The contents stress the importance and possibilities of numerical simulation and experimental measurements on all those environmental flows that affect our environment, sometimes dramatically. The basic concept of dense flow relates to a great variety of natural phenomena that occur both in the field and in the laboratory. A more detailed understanding of these may lead not only to a better description of what happens in nature but also to the definition of more effective countermeasures to limit the worst effects or even to predict the dynamics of natural disasters in order to minimise potential damage.This book contains sections on the following topics: Mass wasting and solid transport; Slope failure and landslides; Sediment, slurry and granular flows; Solid transport within a streamflow; Hyper-concentrated flows; Debris-flow phenomenology and rheology; Debris-flow triggering and mobilisation mechanisms; Debris flow modelling; Debris flow disaster mitigation (structural and non-structural measures); Case studies; Computer models; Rock falling problems and Mechanics of solid-liquid-flows.