RINA - Démonstrateur d’utilisation de l’intelligence artificielle pour la gestion opérationnelle des risques naturels gravitaires géologiques | FEREC 2020

Figure 6: Lithological evolution of la Réunion 2.2. Temporal data Temporal data include the meteorological information (daily temperature and rain), and also the rock falls and their description (date, location along the road and hitted lane, approximate volume). The data sets contained the rainfall accumulated in millimeters every 24h on 3 different points along the road. Meteorological information was also acquired from stations on the 2 cities which are connected by the road, Le Port and Saint-Denis. Data from those stations are available on the web site https://www.historique-meteo.net/. They provide daily values of the maximum and minimum temperature and the daily rain. The rock falls are listed in a table with all the information regarding each event as described in the previous section. Temporal analysis will consider daily intervals as it is the shortest period of time we have all the information and operationally is what makes more sense as the rules for closing the road were created taking into account daily intervals. There were a total of 5 different stations measuring values of the daily rain, 3 along the road and 2 on the cities. All 5 values are extremely correlated with a value superior to 0.85 for all cross correlations as expected. Previous studies used the maximum value between the 3 stations on the side of the road. This is done as the maximum value is the one that will probably cause a 11