The Encontro das Águas occurs near Manaus. This natural phenomenon brings the Rio Negro and the Rio Solimões together without immediate mixing. The waters run side by side for more than 6 km before they merge into the Rio Amazonas. This visual contrast is visible even from space.
Physical Characteristics
The waters possess distinct properties. The Rio Negro maintains an average temperature of 28ºC with a pH between 3.8 and 4.9. While the Rio Solimões flows at a speed of 4 to 6 km/h, it presents a muddy color due to sediments coming from the Cordilheira dos Andes.
Density varies between the rivers. The Rio Negro flows at 2 km/h. These rivers do not mix immediately because differences in temperature, acidity, and current speed prevent instant confluence.
Tourism and Heritage
The site is a cultural heritage asset. IPHAN has protected the phenomenon for its archaeological, ethnographic, and landscape value. Visitors can observe botos during river excursions.
Local gastronomy options exist. Floating restaurants serve typical foods from the Amazonas region. You can feel the thermal contrast by touching the waters with your hands.
