Ribeirão Arrudas
Encyclopedia
Arrudas is a stream that begins its course in Contagem
Contagem
Contagem is a city in the center of the state of Minas Gerais, in Brazil. It is located only 21 kilometers from the capital, Belo Horizonte and forms part of a metropolitan area with a population of 4.8 million....

, goes down through Belo Horizonte
Belo Horizonte
Belo Horizonte is the capital of and largest city in the state of Minas Gerais, located in the southeastern region of Brazil. It is the third largest metropolitan area in the country...

. It is one of the source of Das Velhas River Rio das Velhas in Sabará
Sabará
Sabará is a Brazilian municipality located in the state of Minas Gerais. The city belongs to the mesoregion Metropolitana de Belo Horizonte and to the microregion of Belo Horizonte.-See also:* List of municipalities in Minas Gerais...

. Ribeirão Arrudas is formed by many streams: Jatobá, Barreiro, Bonsucesso, Cercadinho, Piteiras, Leitão, Acaba Mundo, Serra, Taquaril, Navio-baleia, Santa Terezinha, Ferrugem, Tijuco, Pastinho, among others, which are the tributaries of Arrudas. Together, Arrudas and its affluents form the Arrudas River Basin Bacia do Ribeirão Arrudas.
Although most of the sources that make this important tributary of the Rio das Velhas are still clean, almost all sewage from Contagem
Contagem
Contagem is a city in the center of the state of Minas Gerais, in Brazil. It is located only 21 kilometers from the capital, Belo Horizonte and forms part of a metropolitan area with a population of 4.8 million....

 and from Belo Horizonte
Belo Horizonte
Belo Horizonte is the capital of and largest city in the state of Minas Gerais, located in the southeastern region of Brazil. It is the third largest metropolitan area in the country...

 is being dumped into Arrudas, which also jeopardizes Rio das Velhas Basin and Rio São Francisco Basin. The rapid and disorderly Urbanization
Urbanization
Urbanization, urbanisation or urban drift is the physical growth of urban areas as a result of global change. The United Nations projected that half of the world's population would live in urban areas at the end of 2008....

 of Contagem
Contagem
Contagem is a city in the center of the state of Minas Gerais, in Brazil. It is located only 21 kilometers from the capital, Belo Horizonte and forms part of a metropolitan area with a population of 4.8 million....

 Belo Horizonte
Belo Horizonte
Belo Horizonte is the capital of and largest city in the state of Minas Gerais, located in the southeastern region of Brazil. It is the third largest metropolitan area in the country...

 and later the construction of avenues to alleviate traffic
Traffic
Traffic on roads may consist of pedestrians, ridden or herded animals, vehicles, streetcars and other conveyances, either singly or together, while using the public way for purposes of travel...

 in Belo Horizonte
Belo Horizonte
Belo Horizonte is the capital of and largest city in the state of Minas Gerais, located in the southeastern region of Brazil. It is the third largest metropolitan area in the country...

 had removed the green on the banks of Arrudas, contributing to the increase in temperature in the city. In addition, the concrete riverbed added to the increasing soil sealing of the city have caused increasingly destructive floods along the basins of the Arruda and Rio das Velhas, in recent years.
The recent construction of boulevards
Boulevards
Boulevards is a network of city guides on the Internet established in 1994 by Boulevards New Media Inc., an early digital media pioneer. It preceded other city guide networks such as Citysearch and Microsoft's now-defunct Sidewalk.com product, which launched under a similarly metaphorical brand and...

, as government attempts to solve the traffic
Traffic
Traffic on roads may consist of pedestrians, ridden or herded animals, vehicles, streetcars and other conveyances, either singly or together, while using the public way for purposes of travel...

 problem in Belo Horizonte
Belo Horizonte
Belo Horizonte is the capital of and largest city in the state of Minas Gerais, located in the southeastern region of Brazil. It is the third largest metropolitan area in the country...

covered part of the stream, altering significantly the landscape of the city.

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