INVENTÁRIO DE INFORMAÇÕES SOBRE PROJETO E EXECUÇÃO DA BARRAGEM DO CANAL SÃO GONÇALO

Abstract

This article presents a technical and historical inventory of the São Gonçalo Channel Dam, constructed in 1977 in the southern region of Rio Grande do Sul, with the purpose of preventing saltwater intrusion into the Mirim Lagoon and ensuring water quality for irrigation, urban supply, and ecological preservation. The research specifically documents the planning and execution process of the dam, highlighting challenges such as the strategic selection of the IPEAS profile location, based on favorable geotechnical criteria and proximity to natural resources. The adopted construction methods, including the hydraulic diversion of the channel and closure dikes, are described in detail. Geotechnical data of the area were presented, including characterization and parameters of soil deformability and strength, which supported critical decisions in the project. The article also emphasizes the need for future studies on the geotechnical monitoring of the dam, nearly five decades after its operation began, to assess its safety and functionality. It concludes that this dam remains an example of efficient and integrated hydraulic engineering, demonstrating the positive impact of well-planned infrastructure on regional development and environmental preservation.