ABSTRACT
A total of 89 debris-flow events was analysed by different types of approaches. Firstly, a statistical analysis of all the events was carried out in order to determine significant parameters related to the failure mechanism as well as to the mobility. Second, a numerical approach was applied to study the velocity and the runout distance of those debris flows that are characterised by volumes larger than 1000 m3. The results indicate that most events initiated as shallow landslides in loose colluvium and transformed down-slope into debris flows. Moreover, there exists a relationship between the drainage basin area upstream of the debris flow initiation and the volume mobilised.
