Analysis of historical disasters Sample Clauses

Analysis of historical disasters. In order to match the scope of the different SafeLand case studies, the analysis of historical slide disasters in France was restricted to rock falls, mudflows and landslides. Moreover, as the French overseas territories (Guyane, Martinique, Guadeloupe and La Réunion) face different climatic and anthropogenic pressures, and so do not represent typical European contexts, only events observed in metropolitan France were selected. Furthermore, in order to be consistent with the above Norwegian analyses, only movements which have caused casualties or physical damages are considered as disasters. Another filter criterion for the selection of events used in the analyses was the existence of a known date of occurrence (with a precision of at least one decade). Indeed, this information is necessary to put the events in their context, and so to evaluate the influence of human activities on triggers of mass-movements. As a result, the database contains 2055 rock-falls disasters, 605 mudflows disasters and 3232 landslides disasters fulfilling these criteria. The causes are not always stated2. Moreover, it has not always been possible to determine which the triggering cause of the event. As a consequence, the analyses focus on causes, which is sometimes a combination of human and natural mechanisms. The results are shown in Table 2.1.2. 2 By default, if no further information was given in the detailed cardboards, it was assumed that if only one cause was filled out, it was the only cause, otherwise the causes were assumed unknown