The parameters morphometric potential use as indicator of the debris flows occurrence in Costal North of São Paulo

Abstract

The objective of this study was to evaluate the role of morphometric (areal and linear) (qualitative method), associated parameters with the rainfall variables and sediment concentration (quantitative method), as a potential indicator of debris flow scale sub-basins in the Serra do Mar, on the north coast of São Paulo. The application of different scenarios of rainfall (mm/h) and solids concentration (30% and 50%) resulted in 60% increase in sediment volume as a function of intensity of precipitation increase. Concerning sediment concentration, the increase was 71%. It is believed that this work can assist in the planning of that sub-basins and serve as an indicator of possible mitigating actions, minimizing the damage that may occur on or near the areas inserted insides of such sites.