REVISÃO DESCRITIVA SOBRE QUALIDADE DA ÁGUA, PARÂMETROS E MODELAGEM DE ECOSSISTEMAS AQUÁTICOS TROPICAIS.

portugais. <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML /> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--><em style="mso-bidi-font-style: normal;"><span style="font-size: 12.0pt; line-height: 115%; font-family: ">A investigação trata de uma revisão descritiva sobre qualidade da água em rios e reservatórios de barragem bem como os principais processos físicos, químicos e biológicos que afetam seus ecossistemas. O objetivo foi descrever um panorama geral sobre as novas tendências de investigações sobre o tema, com destaque aos efeitos de barragens na Amazônia. Foram investigados na literatura os principais gradientes físicos, químicos e biológicos que influenciam o equilíbrio desses ecossistemas em bacias e sua interação com o clima e a hidrologia. Estudos de caso foram considerados para a bacia hidrográfica do rio Araguari - Amapá/Brasil. A metodologia consistiu na descrição, importância, vantagens, limitações e análise crítica sobre o uso de modelos da qualidade da água como suporte à tomada de decisão na conservação de ecossistemas aquáticos sob duas perspectivas: uso do solo da bacia e influência climática. A bacia do rio Aragauari foi utilizada como referência de análise para outras regiões da Amazônia. A</span><span style="font-size: 12.0pt; line-height: 115%; font-family: ">o longo dos últimos 10 anos de estudo, concluiu-se, que o rio Araguari apresenta forte resiliência a impactos ambientais apesar do atual uso e ocupação do solo na bacia. 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