Simulação do rompimento de barragens na bacia hidrográfica do Banabuiú-CE

Abstract

The data caused by a dam break are very significant, so they should be highly prevented and avoided since such structures present an inherent risk . The National Dams Safety Policy , which established Law 12.334 / 2010, has as one of its instruments the Dams Safety plan,which should contain for dams whose associated potencial damage is classified as high,a plan fordisaster action including all the actions that must be taken in emergency situations,as in cases of dam failure . In view to this,the need forns to an evaluation of possible dam breaks arose in order to determine the flood area. For the modeling of rupture in the state of Ceará, it is important to consider the existing dense network of reservoirs . In this way, the simulations were performed considering the possibility of occurrence the cascade effect, since the impacts of the occurrence of this type of rupture will be potentialized. The inundation maps generated by the software HEC-RAS from the topography extracted of a digital elevation model (DEM) with SRTM images (Shuttle Radar Topography Mission) represent a preliminary study of rupture for the selected dams and provide an initial idea to a more precise modeling to be used in contingency plans and risk mitigation studies later on. The impacts in the region downstream of the three dams selected for the study were analyzed, considering different simulation scenarios, based mainly on the maximum water level reached by the rupture wave. Finally, comparisons were made between the simulated scenarios and the results obtained by other methodologies.