Análise das áreas inundadas e os respectivos impactos devido aos diferentes valores do coeficiente de rugosidade no rompimento da Barragem de Monjolinho

Abstract

Dams are designed structures, essential to reduce flood risks, promote water storage and water supply, and generate energy from the water potential energy. The main reasons that lead to the failure of a dam are: infiltration, galling or liquefaction, in some cases can occur the rupture of the dam body can occur. The dam breaking projects a large amount of stored water, causing flooding of large areas downstream of the dam. This study aims to evaluate data such as flooded areas, and elevation of water levels generated by the hydraulic model, after a dam breaking and the socioenvironmental impacts. The dam studied was the Monjolinho dam, located in the Passo Fundo River in the municipality of Nonoai/RS, and the hydraulic model used for the analysis was HEC-RAS software. The results reveal that the changes in the flooded areas were significant for all stretches of the studied rivers, as well as for the different roughness values used.