Avaliação dos parâmetros do modelo Kineros 2 para simulação hidrossedimentológica em duas pequenas bacias hidrográficas

Abstract

The aim of this research is to evaluate the parameters of Kineros-2 model to the periurban catchments areas Alto da Colina II and Sítio do Tio Pedro, two little cachtments of Vacacai-Mirim river, in Santa Maria, RS state through the parameters variations involved in the calibration, trying to reach a better representation of the processes of the rainwater drainage. The catchments areas Alto da Colina II and Sítio do Tio Pedro are 1.44 km2 and 0.39 km2 as well as 3.82% and 13.09% of impermeable area respectively. The catchments area of Alto da Colina II was discretizated in 22 elements, which were 15 flats and 7 canals. The catchments area of Sítio do Tio Pedro was discretizated in 10 elements, which were 7 flats and 3 canals. The main focus of this work was the calibration of selected events to the respective catchments areas and the understanding of the parameters involved in the simulations. Five events rainy for each of the two catchements studied, corresponding to events used by Bastos (2007), obtained from Belló (2004) and Carvalho (2003) for the evaluation of the model SWMM. The physical characteristics and the use and occupancy of the soil were obtained from Bellinaso (2003) and Carvalho (2003). The cross sections representing stretches of stream, were obtained from survey conducted by MELLER (2004). The results obtained in the calibration of parameters were satisfactory. For the discretization adopted in the Alto da Colina II cachtmet has obtained an average coefficient of determination between the calculated and observed from 0.92 to 0.78 for flow and sediment totals. In discretization applied to the Sítio do Tio Pedro Cachtment, the determination coefficient average of 0.78 was found to flow and sediment to total one can not calculate the determination coefficient because the small size of the cachtment.