FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZIL
<p class="Default">Bars are semi-submerged fluvial forms associated with the availability of sediments and a temporal dynamic, whose dimensions are controlled by the flow and depth of the channel. Attachment bars are very common in large anabranching river systems and play an import...
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| Format: | Article |
| Language: | English |
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União da Geomorfologia Brasileira
2017-08-01
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| Series: | Revista Brasileira de Geomorfologia |
| Subjects: | |
| Online Access: | http://www.lsie.unb.br/rbg/index.php/rbg/article/view/1135 |
| _version_ | 1827298692329111552 |
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| author | Vanessa Cristina Dos Santos José Cândido Stevaux Mario Luis Assine |
| author_facet | Vanessa Cristina Dos Santos José Cândido Stevaux Mario Luis Assine |
| author_sort | Vanessa Cristina Dos Santos |
| collection | DOAJ |
| description | <p class="Default">Bars are semi-submerged fluvial forms associated with the availability of sediments and a temporal dynamic, whose dimensions are controlled by the flow and depth of the channel. Attachment bars are very common in large anabranching river systems and play an important role in island formation and ecology. The Upper Paraná River exhibits an anabranching pattern characterized by channels of different sizes, separated by islands and bars. The objective of this work is to present the processes involved in the formation and development of attachment bars in Santa Rosa Island, situated in Porto Rico, State of Parana, Southern Brazil. Acquisition campaigns were performed to obtain data on channel hydraulics (ADCP equipment), morphometry (Echo-sound profiles) and textural parameters (grain-size analyses) at high and medium water levels. Santa Rosa Island divides the flow into two channels of distinct hydraulic and sedimentary dynamics. Flow diversion produces a decrease in flow velocity and consequent sediment deposition near the upstream end of Santa Rosa Island. The formation and maintenance of attachment bars in Santa Rosa Island is related to flow competence reduction and the occurrence of divergent currents. Vegetation cover and flow regime control its permanence. </p> |
| first_indexed | 2024-04-24T15:20:26Z |
| format | Article |
| id | doaj.art-903278916fa94abab33004df9adc1907 |
| institution | Directory Open Access Journal |
| issn | 1519-1540 2236-5664 |
| language | English |
| last_indexed | 2024-04-24T15:20:26Z |
| publishDate | 2017-08-01 |
| publisher | União da Geomorfologia Brasileira |
| record_format | Article |
| series | Revista Brasileira de Geomorfologia |
| spelling | doaj.art-903278916fa94abab33004df9adc19072024-04-02T08:13:16ZengUnião da Geomorfologia BrasileiraRevista Brasileira de Geomorfologia1519-15402236-56642017-08-0118310.20502/rbg.v18i3.1135431FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZILVanessa Cristina Dos Santos0José Cândido Stevaux1Mario Luis Assine2Universidade Estadual PaulistaUniversidade Estadual PaulistaUniversidade Estadual Paulista<p class="Default">Bars are semi-submerged fluvial forms associated with the availability of sediments and a temporal dynamic, whose dimensions are controlled by the flow and depth of the channel. Attachment bars are very common in large anabranching river systems and play an important role in island formation and ecology. The Upper Paraná River exhibits an anabranching pattern characterized by channels of different sizes, separated by islands and bars. The objective of this work is to present the processes involved in the formation and development of attachment bars in Santa Rosa Island, situated in Porto Rico, State of Parana, Southern Brazil. Acquisition campaigns were performed to obtain data on channel hydraulics (ADCP equipment), morphometry (Echo-sound profiles) and textural parameters (grain-size analyses) at high and medium water levels. Santa Rosa Island divides the flow into two channels of distinct hydraulic and sedimentary dynamics. Flow diversion produces a decrease in flow velocity and consequent sediment deposition near the upstream end of Santa Rosa Island. The formation and maintenance of attachment bars in Santa Rosa Island is related to flow competence reduction and the occurrence of divergent currents. Vegetation cover and flow regime control its permanence. </p>http://www.lsie.unb.br/rbg/index.php/rbg/article/view/1135attachment bar, fluvial processes, anabranching river, fluvial geomorphology, paraná river. |
| spellingShingle | Vanessa Cristina Dos Santos José Cândido Stevaux Mario Luis Assine FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZIL Revista Brasileira de Geomorfologia attachment bar, fluvial processes, anabranching river, fluvial geomorphology, paraná river. |
| title | FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZIL |
| title_full | FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZIL |
| title_fullStr | FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZIL |
| title_full_unstemmed | FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZIL |
| title_short | FLUVIAL PROCESSES IN ATTACHMENT BARS IN THE UPPER PARANÁ RIVER, BRAZIL |
| title_sort | fluvial processes in attachment bars in the upper parana river brazil |
| topic | attachment bar, fluvial processes, anabranching river, fluvial geomorphology, paraná river. |
| url | http://www.lsie.unb.br/rbg/index.php/rbg/article/view/1135 |
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