Metodologia para a Caracterização do Coeficiente de Manning Variando na Seção Transversal e ao Longo do Canal Estudo de Caso Bacia do Alto Sapucaí-MG

This work aims at providing a greater theoretical and practical foundation on uniform flow in open channels, as well as roughness coefficient for flow, in order to supply the variation of Manning’s coefficient for future studies along and in the transversal sections of Sapucai River in simulations of gradual varied non-permanent flow using Saint-Venant Equations. Data from some rivers in the United States were used to characterize resistance in the section. Based on these data, curves were built relating depth and Manning’s coefficient in Sapucai River in the state of Minas Gerais. The longitudinal profile was also traced using field observations. These data are essential for the calibration of hydraulic models. As a result we can observe that Manning’s coefficient calculated by the proposed method approaches the values measured in the field