NUMERICAL SIMULATION OF DEBRIS-FLOW PROCESSES: AN APPLICATION ON THE COAST OF SÃO PAULO STATE, BRAZIL

Código

IV-END0188

Autores

Claudia Vanessa dos Santos Corrêa, Fábio Augusto Gomes Vieira Reis, Lucilia do Carmo Giordano, Victor Carvalho Cabral, Vinícius Queiroz Veloso, Caiubi Emanuel Souza Kuhn

Tema

08 - Movimentos de massa

Resumo

Debris flows are hydrogeomorphological processes that develop along drainage networks and involve generally dense fluids, composed of materials of different grain sizes, as well as woods and variable amounts of water, identified as natural processes that constitute the landscape's dynamics and modeling. The most susceptible areas to the occurrence of these processes in Brazil are in the foothills of the Serra do Mar, Serra da Mantiqueira, and the Serra Geral, and on the north coast of São Paulo State. On 03/18/1967 there were an important landslide and debris-flow events that affected the region of Caraguatatuba and São Sebastião. In this area, a pipeline network is associated with Petrobras Treatment Units, other enterprises, structures, and a large urban area in growth. This work aims to show the results of the back-analysis of the debris-flow events that occurred in 1967 in a mountain area in the Serra do Mar in the Caraguatatuba region (São Paulo State, Brazil) with RAMMS numerical simulation, using calibrated input parameters. Field observations and the back-analysis studies showed that the debris-flow processes in the Serra do Mar region are strictly granular, which helped the modeling step, and the debris deposits are preferentially deposited in regions with low slopes (