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Posts tagged Manaus

The “Meeting of Waters” Near Manaus, Brazil – October 24th, 2009

3.1S 60W

October 24th, 2009 Category: Image of the day, Rivers

Brazil - September 29th, 2009

Brazil - September 29th, 2009

The city of Manaus, the capital of the state of Amazonas in Brazil, is situated at the confluence of the Negro and Solimões Rivers. The Negro River, true to its name, appears to have black waters, while the Solimões (or Upper Amazon) River is light brown.

The two rivers’ confluence is called the Meeting of Waters (in Portuguese, Encontro das Águas). For 6 km (3.7 mi) the rivers’ waters run side by side without mixing (near right edge, southeast of the city). This phenomena is due to differences in temperature, speed and water density of the two rivers. The Negro River flows at near 2 km per hour at a temperature of 22°C, while the  Solimões River flows between 4 to 6 km per hour at a temperature of 28°C.

The Amazon Basin in the Brazilian States of Amazonas and Pará

3.1S 60W

October 11th, 2009 Category: Rivers

Brazil - September 29th, 2009

Brazil - September 29th, 2009

The Amazon Basin, the largest drainage basin in the world, covers about 40 percent of South America, an area of approximately 6,915,000 square kilometres (2,670,000 sq mi).

In this image, part of the basin in Brazil is visible, from the confluence of the Negro and Solimões (Upper Amazon) Rivers near Manaus in the state of Amazonas (left), to the confluence of the Tapajós and Amazon Rivers near Santarém in the state of Pará (right). The full image shows more of the Negro River northwest of Manaus as well.

The area covered by the water of the Amazon River and its tributaries more than triples over the course of a year. In an average dry season 110,000 square kilometres (42,000 sq mi) of land are water-covered, while in the wet season the flooded area of the Amazon Basin rises to 350,000 square kilometres (135,000 sq mi) .

Manaus, Brazil – October 17th, 2008

October 17th, 2008 Category: Image of the day

Manaus and the Amazon Rain Forest - September 28th, 2008Manaus

Manaus and the Amazon Rain Forest - September 28th, 2008

Manaus is the largest city in the Brazilian Amazon and capital of the State of Amazonas. Located on the Rio Negro near its confluence with the Amazon River, it is the chief port and a hub for the region’s extensive river system. Manaus is an important area for ecological tourism as well as an important industrial center for electronics manufacturing.

Amazonas is a state of Brazil, located in the northern part of the country. Neighboring states are (from north clockwise) Roraima, Pará, Mato Grosso, Rondônia, and Acre. It also borders Peru, Colombia and Venezuela. This includes the department Amazonas in Colombia, as well as the Amazonas State, Venezuela (it does not border the Peruvian Amazonas Region). This is the largest Brazilian State in area, with 1.5 million square kilometers.

Image Close-ups

Close-up of the city of Manaus

Close-up of the city of Manaus

Detail of deforestation in the state of Amazonas

Detail of deforestation in the state of Amazonas

In the close-up of Manaus, we can see the city’s location on the banks of the Rio Negro (Black River, so named due to the dark color of the water). We can also see the convergence of the Rio Negro, the dark river on the left, and the Amazon River (also called Rio Solimões), the brown river running across the image.

In the second close-up, we can have a detailed look at some deforestation north of Manaus. Deforestation results from removal of trees without sufficient reforestation (the replanting of trees), and results in declines in biodiversity.

Close-up of Lake Balbina

Close-up of Lake Balbina

Thanks to the sun glint in the final close-up, we can clearly see the outline of Lake Balbina, located 125km (77mi) north of Manaus. It was created by the Balbina Dam (Usina Hidrelétrica de Balbina), a hydroelectric dam and power plant on the Uatumã River. The dam generates an average of 112.2 megawatts of electricity from the river system and floods a total of 2360 square kilometers of rainforest. The dam was established to provide a renewable electricity supply to the city of Manaus but was considered by locals a controversial project from the start, due to the loss of forest and displacement of tribal homes grounds such as the Amerindian tribe.

source Wikipedia