Geoformas deposicionais e sedimentos de fundo na foz da baía Salobra confluência com o rio Paraguai Pantanal de Cáceres - Mato Grosso (Depositional geoforms and bottom sediments in outfall of the Salobra bay confluency with Paraguay River Pantanal of ...)

2013 
A baia Salobra encontra-se no baixo curso do corrego Piraputanga, Pantanal de Caceres – Mato Grosso, Brasil. Possui aproximadamente 629 m de extensao, esta localizada entre as coordenadas geograficas 15o 58’ 64” a 15o 58.35’ 49” latitude sul e 57o 41’ 08.44” a 57o 40’ 50.29” longitude oeste. O objetivo deste trabalho foi identificar as geoformas deposicionais, bem como verificar e quantificar os sedimentos de fundo transportados na foz da baia Salobra confluencia com o rio Paraguai em Caceres – Mato Grosso. Os procedimentos adotados foram: revisao da literatura, caracterizacao ambiental, observacao e monitoramento da area, coleta e analise de sedimentos de fundo. Para analise dos sedimentos foram utilizados os metodos de peneiramento e pipetagem. O primeiro segmento apresentou a deposicao com barra lateral e maior concentracao de areia. O segundo segmento registrou-se barra central. E no terceiro segmento apresentou barra lateral com predominância da areia. 800x600 Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri","sans-serif";} A B S T R A C T The Salobra bay is in the lower course of the Piraputanga stream, Pantanal of Caceres, Mato Grosso, Brazil. It has approximately 629 m long, is located between the geographical coordinates 15o 58’ 64” to 15o 58.35’ 49” south latitude and 57o 41’ 08.44” to 57o 40’ 50.29” west longitude. The aim of this study was to identify the depositional landforms, as well as verify and quantify the bottom sediments transported in the mouth of the Salobra bay confluence with Paraguay River. The procedures used were: literature review, environmental characterization, observation and monitoring of the area, collection and analysis of depth sediments. For analysis of sediments were used methods of sieving and pipetting. The first segment presented the deposition with sidebar and higher sand concentration. The second segment registered a central bar. And the third segment shows sidebar predominantly sand. Key words : Pantanal de Caceres; Salobra bay; depositional features; textural analysis.
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