A confluence occurs where two or more bodies of water converge. A particularly notable example of this phenomenon is observed in Brazil, where the Rio Negro and Solimes River join to form the Amazon River. This junction is characterized by a striking visual contrast due to significant differences in water properties.
The dramatic merging serves as a vital navigation point and a significant ecological area. The distinct separation of the waters, which can persist for several kilometers, is a result of variations in temperature, speed, and sediment load. This natural display is a testament to the diverse hydrological characteristics within the Amazon basin and attracts scientific interest and tourism.