Abstract: “The paper analyzes particular matrixes that facilitate an evaluation of the levels of risk and alarm in increasingly frequent and dangerous phenomena of rapid flow. This increased frequency and hazard is related to climate change and to environmental modifications caused by human interventions. In particular the paper analyzes matrixes that, by means of the assessment of a reduced number of simplified parameters, makes it possible to evaluate the levels of risk and of attention in the phenomena of slope instability. Finally the importance of the instrumental monitoring of the RTU (Reference Territorial Unities) is stressed in the context of civil protection planning.”

Keywords: rapid flow, risk matrixes, alarm threshold, slope monitoring