Bacia do rio Caí

A Bacia do Caí situa-se na Região Hidrográfica do Guaíba, na porção nordeste do Rio Grande do Sul. Abrange as províncias geomorfológicas do Planalto Meridional e Depressão Central.[1]

Possui uma área de 4 983 km² e população estimada em 656 577 habitantes em 2020,[2] abrangendo municípios como Bom Princípio, Canela, Caxias do Sul, Feliz, Harmonia, Lindolfo Collor, Linha Nova, Montenegro, Nova Petrópolis, Pareci Novo, Picada Café, Presidente Lucena, Santa Maria do Herval, São Francisco de Paula, São José do Hortêncio, São Sebastião do Caí, Sapiranga e Vale Real.[1]

Suas nascentes estão localizadas em São Francisco de Paula, a 1 km de altitude. Os principais afluentes do Rio Caí são os arroios Cará, Cadeia, Forromeco, Mauá, Maratá e Piaí. Os principais usos da água nesta bacia se destinam a irrigação, uso industrial e abastecimento público. A exploração agrícola intensa e o desmatamento das encostas declivosas e a poluição hídrica no curso médio e inferior são os maiores problemas enfrentados nesta bacia.[1]

Altitude e localização de alguns dos corpos de água principais[3]
Principais corpos de água Altitude/
nascente principal 		Localização
Rio Caí Arroio São Jorge 1000 m São Francisco de Paula
Rio Santa Cruz 965 m
Arroio do Junco 1000 m
Rio do Pinto 960 m
Rio Piaí 940 m Caxias do Sul
Unidades de conservação
Unidade de conservação Município Área (ha)
Parque Estadual Delta do Jacuí Canoas
Charqueadas
Eldorado do Sul
Nova Santa Rita
Porto Alegre
Triunfo 		17 245,00
Floresta Nacional de Canela Canela 557,64
Parque Estadual do Caracol Canela
Gramado 		100,00

Referências

  1. ↑ a b c «G030 - Bacia Hidrográfica do Rio Caí». SEMA 
  2. ↑ «G030 - Bacia Hidrográfica do Rio Caí». Secretaria do Meio Ambiente e Infraestrutura 
  3. ↑ «RELATÓRIO ANUAL SOBRE A SITUAÇÃO DOS RECURSOS HÍDRICOS NO ESTADO DO RIO GRANDE DO SUL EDIÇÃO 2007/2008» (PDF). Governo do Estado do Rio Grande do Sul. Arquivado do original (PDF) em 8 de janeiro de 2019 

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