page_title: Manaus
section_title: Meeting of Waters
hierarchical_section_title: Manaus / Sights and attractions / Meeting of Waters
caption_attribution_description: Português: Encontro das Águas, Manaus, Brasil English: Meeting (confluence) of the Waters, Manaus, Brazil Deutsch: Zusammenfluss von Rio Negro und Amazonas (Schwarzwasserfluss und Weißwasserfluss) bei Manaus, Bundesstaat Amazonas.
context_page_description: Manaus is the capital and largest city of the Brazilian state of Amazonas. It is the seventh-largest city in Brazil, with an estimated 2019 population of 2,182,763 distributed over a land area of about 4,401.97 square miles. Located at the east center of the state, the city is the center of the Manaus metropolitan area and the largest metropolitan area in the North Region of Brazil by urban landmass. It is situated near the confluence of the Negro and Solimões rivers.
  The city was founded in 1669 as the Fort of São José do Rio Negro. It was elevated to a town in 1832 with the name of "Manaus", an altered spelling of the indigenous Manaós peoples, and legally transformed into a city on October 24, 1848, with the name of Cidade da Barra do Rio Negro, Portuguese for "The City of the Margins of the Black River". On September 4, 1856 it returned to its original name.
  Manaus is located in the center of the world's largest rainforest, and home to the National Institute of Amazonian Research, being the most important center for scientific studies in the Amazon region and for international sustainability issues.
context_section_description: This natural phenomenon is caused by the confluence of the Negro River's dark water and the Solimões River's muddy brown water that come together to form the Amazonas River. For 6 km (3.7 mi) or more, both rivers waters run side by side without mixing. The reason for this is not clear, although it is likely that the main factors are differences in the speed of the current, the volumes of water and the different densities of the two rivers. It is not thought that other differences between the two rivers (temperature and acidity) affect the mixing process significantly. The Negro River flows approximately 2 km/h (1.2 mph) at 28 °C (82 °F), while the Solimões River flows 4 to 6 km/h (2.5 to 3.7 mph) at 22 °C (72 °F).
caption: The natural phenomenon of the confluence of the Rio Negro's water and the Solimões River's water
exif: {"Image SubfileType": "Full-resolution Image", "Image ImageWidth": "5616", "Image ImageLength": "3744", "Image BitsPerSample": "[8, 8, 8]", "Image Compression": "Uncompressed", "Image PhotometricInterpretation": "2", "Image ImageDescription": "Encontro das \u00c1guas", "Image Make": "Canon", "Image Model": "Canon EOS 5D Mark II", "Image StripOffsets": "50298", "Image SamplesPerPixel": "3", "Image RowsPerStrip": "3744", "Image StripByteCounts": "63078912", "Image XResolution": "300", "Image YResolution": "300", "Image PlanarConfiguration": "1", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "PhotoScape", "Image DateTime": "2011:10:02 19:22:49", "Image Artist": "Gabriel Heusi", "Image Copyright": "@ Gabriel Heusi", "Image IPTC/NAA": "[5898524, 1193614083, 540, 470024194, 117441794, 1923728193, 477323621, 100669698, 1634623821, 35418997, 1376321561, 1310748521, 1869768549, 1638940, 1952797453, 1919053157, 808591471, 35402033, 1627979801, 3279577453, ... ]", "Image Tag 0x8649": "[]", "Image ExifOffset": "49760", "Image InterColorProfile": "[0, 0, 2, 48, 65, 68, 66, 69, 2, 16, 0, 0, 109, 110, 116, 114, 82, 71, 66, 32, ... ]", "EXIF ExposureTime": "1/400", "EXIF FNumber": "10", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "200", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2011:09:11 15:39:13", "EXIF DateTimeDigitized": "2011:09:11 15:39:13", "EXIF ShutterSpeedValue": "540241/62500", "EXIF ApertureValue": "415241/62500", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF SubjectDistance": "4294967295", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "35", "EXIF SubSecTimeOriginal": "02", "EXIF SubSecTimeDigitized": "02", "EXIF FocalPlaneXResolution": "5616000/1459", "EXIF FocalPlaneYResolution": "1872000/479", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Manual Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF BodySerialNumber": "220101927", "EXIF LensSpecification": "[16, 35, 0/0, 0/0]", "EXIF LensModel": "EF16-35mm f/2.8L II USM"}