Application of Hazard Index as Reference in Floods (PAP014838)

Código

PAP014838

Autores

André Côrte Brilho Janine, Maria Clara Fava, Jairo Rotava, Eduardo Mário Mendiondo

Tema

Flood resilient societies through community preparedness

Resumo

Floods have been presented in recent years as the major cause of material loss in urban environments and have focused mainly due to higher frequency in which extreme events are observed in cities. With this scenario, it becomes important to adopt tools that quickly communicate the population potentially affected by these events which is the level of danger to which they are exposed in a proper time. For this purpose the hazard index is presented as a simple method of obtaining at monitored points and covers risk for various types of losses within its range, and is therefore an advantageous tool for the application of critical points of watersheds. The aim of this study was to analyze the hazard index ranges where there is risk of instability for human adults in point's basin of São Carlos - SP. In order to characterize the points of bathymetry of sections associated with flow measurements that allowed the description of the flow according to the height of the water level, were performed with this information it was possible to define the heights at which preestablished levels of danger occur. Initially estimated at some of the parameters such as slope and roughness for each section and, after repeated campaigns, it was possible to reach a better approximation of the curve hazard index x height of water and hence more reliable values of heights corresponding to the danger levels. From the heights set began fieldwork. Six points monitored by high water sensors were chosen for better monitoring of the level of danger during critical events. The points were marked with images representing an adult male to transmit more didactically the transition between levels of danger to which the community could be exposed. We discuss, finally, the efficiency of the index to determine levels of hazard warning the community and the possibility of expanding graphical representations of danger to other bodies immersed in water alert.