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Extreme Events Assessment Methodology Coupling Debris Flow,Flooding and Tidal Levels in the Coastal Floodplain of the Sao Paulo North Coast(Brazil)

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International Journal of Geosciences 2013年第5期4卷 30-38页

作者： Rafael de Oliveira Sakai Diego Lourenco Cartacho Emilia Arasaki Paolo Alfredini Alessandro Pezzoli Wilson Cabral de Sousa Junior Maurizio Rosso luca magni Polytechnic School of Sao Paulo University Department of Hydraulic and Environmental EngineeringHarbour and Coastal Area of the Hydraulic LaboratoryAvenida Professor Luciano GualbertoTravessa 3n.380Cidade UniversitariaSao PauloBrazil National Institute of for Space Research Av.Dos Astronautas n.1758Sao Jose dos CamposSao PauloBrazil Polytechnic of Torino Engineering FacultyDepartment of EnvironmentLand and Infrastructure EngineeringCorso Duca degli Abruzzi n.24TorinoItaly Technological Institute of Aeronautics Infrastructure Engineering DivisionDepartment of Hydric Resources and Environmental SanitationPraca Marechal Eduardo Gomes n.50ITA-IEISao Jose dos CamposSao PauloBrazil Studio Rosso Ingegneri Associati s.r.l. Corso Principe OddoneTorinoItaly

The North Coastal Region of the State of S?o Paulo, which comprises the Municipalities of Caraguatatuba, S?o Sebasti?o, Ilhabela and Ubatuba, is one of the most prone to flooding and debris flow deposition Brazilian areas, owing to hydrological extreme rainfall events usually coupled with extreme tidal levels. This risk is also high due to human lives and material assets, with increasing population rates and the establishment of large companies such as the Oil industry, with reduced defense/prevention measures and *** catastrophic scenario of the city of Caraguatatuba, in March 1967, resulting from one of the most serious natural disasters in Brazil, fosters discussions about probabilities of heavy rainfall-caused events and rise in the sea level in coastal areas. Hence, this research is a consequence of this reality. The research is founded on an innovative methodology based on the analysis of past data of rainfall and tidal stations, complemented with debris flow registers in the region of the north coastal zone of the State of S?o Paulo (Brazil). The anaysis developed involved the meteorological, hydraulic, geotechnical and statistical knowledge *** results are intended to be used for urban planning, designs of macro-drainage, fluvial, maritime projects and debris flow retention structures. These practical applications will then associate the probability of occurrence of certain types of heavy rainfall-caused events such as flooding or debris flow coupled with a corresponding increase in tidal levels.

关键词： Meteorology Hydrology Maritime Hydraulics Rainfall Tidal Levels Extreme Events Natural Disasters Geomorphology Debris-Flow Flooding

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