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Reservoir Created by Furnas Dam North of Sao Paulo, Brazil

20.6S 46.3W

November 25th, 2011 Category: Lakes, Rivers

Brazil - November 24th, 2011

Several rivers and reservoirs can be observed north and northwest of the city of Sao Paulo, which appears as a tan expanse near the coast, in this image of southern Brazil. Due north of the city is the reservoir created by the Furnas Dam, a hydroelectric dam in the Minas Gerais state of Brazil.

The main purpose of the dam and reservoir are the production of electricity and the regulation of the flow of the Grande River. It is built on the canyon of the Grande River, before joining the Sapucaí River downstream. The dam is 127 m (417 ft) tall, 550 m (1,804 ft) long, and 15 m (49 ft) wide at its crest.

The large reservoir, with a surface area of 1,473 km2 (569 sq mi), almost half of the Brazilian coastline, started to form in 1963, bordering thirty-four municipalities. The volume of water is seven times that of Guanabara Bay, at 22,590,000,000 m3 (7.98×1011 cu ft). Normal water level averages at 768 m (2,520 ft).

Rivers and Reservoirs in Southeastern Brazil

21.5S 49.8W

November 20th, 2011 Category: Lakes, Rivers

Brazil - November 13th, 2011

This orthorectified wide-swath ASAR image shows several reservoirs in southeastern Brazil, with cities and towns appearing as bright white spots across the landscape.

Visible along the top edge is the Turvo River, a tributary of the Grande River, which it joins in the reservoir formed by the Água Vermelha Dam, in the states of São Paulo and Minas Gerais. The dam’s reservoir (top left edge) has a capacity of 11.025 km3 (2.645 cu mi). The surface are of the reservoir is 647 km2 (250 sq mi) and its maximum level above sea level is 383.3 m (1,258 ft) and the minimum is 373.3 m (1,225 ft).

Visible at the center left is the Mário Lopes Leão Reservoir (also known as the Promissão Reservoir), in the state of São Paulo, near the cities of Promissão and Avanhandava. It holds the waters of the Tieté River, tributary of the Paraná River.

Visible along the bottom edge are the Xavantes Reservoir and Jurumitim Reservoir. The former has a surface area of 400.3 km2, a volume of 8795 km3 and a maximum depth of 72.78 m.

Reservoirs in Southeastern Brazil

18.6S 48.1W

June 4th, 2011 Category: Lakes, Rivers

Brazil - May 25th, 2011

Several reservoirs can be observed along the left side of this image of southeastern Brazil. At the top left, in the state of Minas Gerais, is the Araguari River, a tributary of the Paranaíba River, which it joins in the reservoir created by Itumbiara Dam.

East of the Itumbiara Reservoir is a lake created by the Emborcação Dam, also known as Theodomiro Sampaio, an embankment dam on the Paranaíba River near Araguari in Minas Gerais, Brazil. It was constructed for hydroelectric power production and flood control.

Moving southward into the lower left quadrant, the Mário Lopes Leão Reservoir (also known as the Promissão Reservoir) can be observed in the state of São Paulo, near the cities of Promissão and Avanhandava. It holds the waters of the Tieté River, tributary of the Paraná River.

Moving over to the center right side of the image, one can observe the reservoir created by the Furnas Dam, in Minas Gerais. South of this reservoir, near the bottom edge, is the city of São Paulo.

Deforestation Along Western Banks of São Francisco River, Brazil – February 15th, 2010

13.2S 43.4W

February 15th, 2010 Category: Climate Change, Image of the day, Rivers, Sediments

Brazil - November 15th, 2009

Brazil - November 15th, 2009

This segment of the São Francisco River in the Brazilian state of Bahia appears tan with sediments. A large area of
deforestation, easily identifiable due to its herring-bone patterns, is visible along the river’s western banks, reaching from near the municipality of Bom Jesus da Lapa (above) to just north of the border with the state of Minas Gerais (below).

Deforestation is the clearance of naturally occurring forests by the processes of humans’ logging and/or burning of trees and plants in a forested area. People’s removal of trees without sufficient reforestation has resulted in damage to habitat, biodiversity loss and aridity. It has adverse impacts on biosequestration of atmospheric carbon dioxide.

Deforested regions typically incur significant adverse soil erosion and frequently degrade into wasteland. In addition to these problems, deforestation and excessive agricultural use of the upper-course waters of the São Francisco and its tributaries have greatly reduced the water flow in the middle course, creating sand banks and islands that hinder navigation.

Fires in Rio de Janeiro State, Brazil – July 3rd, 2009

22.9S 43.2W

July 3rd, 2009 Category: Image of the day, Lakes

Brazil - July 2nd, 2009

Brazil - July 2nd, 2009

Rio de Janeiro

Rio de Janeiro

Lago Feia and sediments

Lago Feia and sediments

The entire coastline of the Brazilian state of Rio de Janeiro is visible here. Areas of note include the city of Rio de Janeiro and sediments from the Paraíba do Sul River, which tinge an area of shoreline green and yellow.

In the close-ups of these areas, several fires are blazing: one north of Rio de Janeiro  and two north of Lago Feia, the large dark brown lake near the sediment-framed coastline.

To the north, above the coastal area surrounded by sediments, is the state of Espírito Santo. Inland, part of the state of Minas Gerais can be seen, including the city of Belo Horizonte (see final close-up).

Belo Horizonte

Belo Horizonte

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