Carla Voltarelli Franco Da Silva,Cristiano de Pádua Milagres Oliveira,André Sandor Kajdacsy Balla Sosnoski,Arisvaldo Vieira Mello Junior, Escola Politécnica da Universidade de São Paulo, Hydraulic and Environmental Engineering Department, carla.voltarelli@gmail.com
Current patterns of land use in Brazilian cities have intensified the difficulties faced by the urban population during flood events. In this context, a thorough analysis of these extreme events are an important strategy for identifying areas most susceptible to the impacts caused by floods and the consequent development of local urban policies aiming at proper water resources management. The purpose is therefore to apply a set of measures for assessment and treatment of the hydrologic data available, as a way of mapping the flooding areas, through the application of mathematical simulation models, combined with digital terrain modeling tools and additional data collected in field. For the application of the methodology, specific critical events with disastrous consequences that took place between the months of December 2009 and February 2010, and again in January 2011, have been chosen, located near the Atibaia River, state of São Paulo, downstream regionally important reservoirs. The hydrological analysis implies that even low-recurrence interval floods may cause potential harm and the resulting inundation mapping process reveals a consistent response to field observations, despite the lack of gauging data.
Keywords: flood risk areas, hydraulics, hydrology