Bays of Ilha Grande and Sepetiba (RJ) The Bays of Ilha Grande and Sepetiba are situated in the southwestern portion of the state of Rio de Janeiro, Brazil. These two bays are hydrologically interconnected through the Ilha Grande Channel, forming an extensive and complex coastal-marine system of considerable environmental and economic significance. The drainage basin associated with this system covers an area of approximately 5,472 km². It comprises both the Ilha Grande Bay Basin and the Guandu Basin, and its hydrological network drains 18 municipalities, including Angra dos Reis, Paraty, Mangaratiba, Itaguaí, and Rio de Janeiro. This region plays a strategic economic role, as it hosts numerous maritime and port terminals, supporting a wide range of activities such as cargo transport, shipbuilding and repair, fishing, tourism, and industrial operations. Due to this concentration of economic infrastructure, the area is subject to significant anthropogenic pressures, making it a critical zone for integrated coastal management, environmental monitoring, and conservation efforts.

Bays of Ilha Grande and Sepetiba (RJ)

The Bays of Ilha Grande and Sepetiba are situated in the southwestern portion of the state of Rio de Janeiro, Brazil. These two bays are hydrologically interconnected through the Ilha Grande Channel, forming an extensive and complex coastal-marine system of considerable environmental and economic significance.

The drainage basin associated with this system covers an area of approximately 5,472 km². It comprises both the Ilha Grande Bay Basin and the Guandu Basin, and its hydrological network drains 18 municipalities, including Angra dos Reis, Paraty, Mangaratiba, Itaguaí, and Rio de Janeiro.

This region plays a strategic economic role, as it hosts numerous maritime and port terminals, supporting a wide range of activities such as cargo transport, shipbuilding and repair, fishing, tourism, and industrial operations. Due to this concentration of economic infrastructure, the area is subject to significant anthropogenic pressures, making it a critical zone for integrated coastal management, environmental monitoring, and conservation efforts.