Coastline changes and sedimentation related with the opening of an artificial channel: the Valo Grande Delta, SE Brazil
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| Format: | Artículo científico |
| Language: | en |
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Academia Brasileira de Ciências
2014
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| author | MICHEL M. DE MAHIQUES |
| author_facet | MICHEL M. DE MAHIQUES |
| contents | Coastline changes and sedimentation related with the opening of an artificial channel: the Valo Grande Delta, SE Brazil MICHEL M. DE MAHIQUES RUBENS C. L. FIGUEIRA DANIEL P. V. ALVES DIANA M. ITALIANI CRISTINA C. MARTINS JOÃO M. A. DIAS Multidisciplinaria (Ciencias Naturales y Exactas) Delta lagoon sedimentation Anthropic activity The role played by human activity in coastline changes indicates a general tendency of retreating coasts, especially deltaic environments, as a result of the recent trend of sea level rise as well as the blockage of the transfer of sediments towards the coast, especially due to the construction of dams. This is particularly important in deltaic environments which have been suffering a dramatic loss of area in the last decades. In contrast, in this paper, we report the origin and evolution of an anthropogenic delta, the Valo Grande delta, on the south-eastern Brazilian coast, whose origin is related to the opening of an artificial channel and the diversion of the main flow of the Ribeira de Iguape River. The methodology included the analysis of coastline changes, bathymetry and coring, which were used to determine the sedimentation rates and grain-size changes over time. The results allowed us to recognize the different facies of the anthropogenic delta and establish its lateral and vertical depositional trends. Despite not being very frequent, anthropogenic deltas represent a favorable environment for the record of natural and anthropogenic changes in historical times and, thus, deserve more attention from researchers of different subjects. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907005 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86 |
| format | Artículo científico |
| id | redalyc_32732907005 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Coastline changes and sedimentation related with the opening of an artificial channel: the Valo Grande Delta, SE Brazil MICHEL M. DE MAHIQUES Multidisciplinaria (Ciencias Naturales y Exactas) Delta lagoon sedimentation Anthropic activity Coastline changes and sedimentation related with the opening of an artificial channel: the Valo Grande Delta, SE Brazil MICHEL M. DE MAHIQUES RUBENS C. L. FIGUEIRA DANIEL P. V. ALVES DIANA M. ITALIANI CRISTINA C. MARTINS JOÃO M. A. DIAS Multidisciplinaria (Ciencias Naturales y Exactas) Delta lagoon sedimentation Anthropic activity The role played by human activity in coastline changes indicates a general tendency of retreating coasts, especially deltaic environments, as a result of the recent trend of sea level rise as well as the blockage of the transfer of sediments towards the coast, especially due to the construction of dams. This is particularly important in deltaic environments which have been suffering a dramatic loss of area in the last decades. In contrast, in this paper, we report the origin and evolution of an anthropogenic delta, the Valo Grande delta, on the south-eastern Brazilian coast, whose origin is related to the opening of an artificial channel and the diversion of the main flow of the Ribeira de Iguape River. The methodology included the analysis of coastline changes, bathymetry and coring, which were used to determine the sedimentation rates and grain-size changes over time. The results allowed us to recognize the different facies of the anthropogenic delta and establish its lateral and vertical depositional trends. Despite not being very frequent, anthropogenic deltas represent a favorable environment for the record of natural and anthropogenic changes in historical times and, thus, deserve more attention from researchers of different subjects. 2014 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32732907005 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.86 |
| title | Coastline changes and sedimentation related with the opening of an artificial channel: the Valo Grande Delta, SE Brazil |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) Delta lagoon sedimentation Anthropic activity |
| url | https://www.redalyc.org/articulo.oa?id=32732907005 |