O Sistema Alto Tietê é um dos sistemas administrados pela SABESP destinados a captação, armazenamento e tratamento de água para a Grande São Paulo[2].
O Sistema Alto Tietê começou a ser planejado no final dos anos 1960, com a finalidade primária de controle de inundações. As primeiras barragens concluídas foram Ponte Nova em 1971 e Taiaçupeba em 1976, e no ano de 1989 é concluída a barragem Jundiaí. Posteriormente foram concluídas as barragens Biritiba em 2001 e Paraitinga em 2003. Todas as barragens do Alto Tietê foram construídas e são operadas pelo Departamento de Águas e Energia Elétrica (DAEE)[2].
Somente em 1992 teve início a operação para abastecimento público, inicialmente composto pelas represas Taiaçupeba e Jundiaí, mas com a demanda crescente da população da Região Metropolitana o sistema foi ampliado com a incorporação das represas Ponte Nova, Biritiba e Paraitinga[1]. Juntas elas possuem uma capacidade de armazenamento de cerca de 575 bilhões de litros, formando o segundo maior sistema da Região Metropolitana de São Paulo[2].
O Sistema Alto Tietê é composto por cinco represas, localizadas próximas às cabeceiras do Rio Tietê, na região dos municípios de Salesópolis, Biritiba-Mirim, Mogi das Cruzes e Suzano:
Também fazem parte do sistema a Estação Elevatória Biritiba e a Estação de Tratamento de Água Taiaçupeba.
Os reservatórios do sistema são alimentados pelos rios Tietê, Claro, Paraitinga, Biritiba, Jundiaí, Grande, Taiaçupeba-Mirim e outros. A interligação entre os reservatórios é realizada através de túneis, canais e estações elevatórias. Além do abastecimento público, o Sistema Alto Tietê atende também ao controle de cheias da região, pois armazena grande quantidade das águas provenientes das chuvas ocorridas em suas cabeceiras.
A capacidade de produção da ETA Taiaçupeba é de 15 mil litros de água por segundo, para atender 4,2 milhões de habitantes da Zona Leste de São Paulo e dos municípios de Arujá, Itaquaquecetuba, Poá, Ferraz de Vasconcelos e Suzano, além de parte de Mogi das Cruzes e de Guarulhos[4].
Em 14 de dezembro de 2014, devido a um longo período de estiagem na região do Alto Tietê, seus reservatórios atingiram 4,1%, o menor nível da história.[5]
Em 23 de outubro de 2014, a Sabesp informou que não havia previsão para captação da reserva técnica do sistema Alto Tietê.[6]
Em 14 de dezembro de 2014, a Sabesp obteve autorização do DAEE para captar mais 39,46 bilhões de litros de água da represa Ponte Nova, pertencente ao sistema Alto Tietê. Esse volume adicional é captado sem o auxílio de bombeamento, e representa um acréscimo de 6,6 pontos percentuais ao volume útil do sistema.[7]
A partir do segundo semestre do ano de 2015, mais precisamente durante a estiagem que se iniciou no mês de julho, o Sistema Alto Tietê registrou sucessivas perdas de volume, chegando ao mês de agosto com 15% de sua capacidade,[8] fazendo com que o então Governador Geraldo Alckmin decretasse oficialmente situação de crise hídrica emergencial do sistema. [9] [10]
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Desert in central-Eastern Australia Sturt Stony DesertSturt's Stony, StonyPosition of Sturt Stony Desert in AustraliaGeographyCountryAustraliaStateSouth Australia, QueenslandCoordinates27°S 140°E / 27°S 140°E / -27; 140 Sturt Stony Desert (previously Sturt's Stony Desert) is an area in the north-east of South Australia, far south western border area of Queensland and the far west of New South Wales. It was named by Charles Sturt in 1844, while he was trying to …
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: 6th Space Operations Squadron – news · newspapers · books · scholar · JSTOR (December 2012) (Learn how and when to remove this template message) 6th Space Operations SquadronDefense Meteorological Satellite Program Block 5 satelliteActive1983–1998; 1998–presen…
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Timeline of Hurricane Katrina – news · newspapers · books · scholar · JSTOR (April 2013) (Learn how and when to remove this template message) Hurricane Katrina 2005 Atlantic hurricane season General Timeline Meteorological history Tornado outbreak Preparations New…
Dieser Artikel bezieht sich auf den deutsch-deutschen Grundlagenvertrag. Grundlagenverträge existieren auch zwischen anderen Staaten, so zum Beispiel der Grundlagenvertrag zwischen Japan und der Republik Korea. Grundlagenvertrag oder Grundvertrag ist die Kurzbezeichnung für den Vertrag über die Grundlagen der Beziehungen zwischen der Bundesrepublik Deutschland und der Deutschen Demokratischen Republik. Er wurde am 21. Dezember 1972 geschlossen, am 11. Mai (Bundesrepublik) bzw. 13. Juni 1973 (…
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この記事には複数の問題があります。改善やノートページでの議論にご協力ください。 出典がまったく示されていないか不十分です。内容に関する文献や情報源が必要です。（2016年3月） 出典は脚注などを用いて記述と関連付けてください。（2016年3月）出典検索?: 島村速雄 – ニュース · 書籍 · スカラー · CiNii · J-STAGE · NDL · dlib.jp …
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