REVISÃO DESCRITIVA SOBRE QUALIDADE DA ÁGUA, PARÂMETROS E MODELAGEM DE ECOSSISTEMAS AQUÁTICOS TROPICAIS.
2015
Alan Cavalcanti da Cunha
Portugués. <!--[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. Entretanto, alguns indicadores da qualidade da água, em trechos significativos do seu médio e baixo cursos, sugerem que efeitos antropogênicos ou "naturais" já se encontram próximos dos limites legais no horizonte de curto e médio prazos, principalmente devido ao acúmulo negativo de impactos que tendem a desequilibrar sua capacidade de resiliência.</span></em><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves /> <w:TrackFormatting /> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF /> <w:LidThemeOther>PT-BR</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> 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