Contribution of Reverse Dune Migration to Stabilization of a Transgressive Coastal Dune Field at Lagoa do Peixe National Park Dune Field (South of Brazil)
Coastal dunes that transgress typically move landward, while their reverse movement is not well understood. The article discusses the study of barchan and barchanoid dunes in the Lagoa do Peixe National Park in the coastal plain of Rio Grande do Sul, Brazil. The aim of the study is to analyze season...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/14/3470 |
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| author | Rogério Portantiolo Manzolli Luana Carla Portz Angela Fontán-Bouzas Volney Junior Borges Bitencourt Javier Alcántara-Carrió |
| author_facet | Rogério Portantiolo Manzolli Luana Carla Portz Angela Fontán-Bouzas Volney Junior Borges Bitencourt Javier Alcántara-Carrió |
| author_sort | Rogério Portantiolo Manzolli |
| collection | DOAJ |
| description | Coastal dunes that transgress typically move landward, while their reverse movement is not well understood. The article discusses the study of barchan and barchanoid dunes in the Lagoa do Peixe National Park in the coastal plain of Rio Grande do Sul, Brazil. The aim of the study is to analyze seasonal patterns and long-term trends in the direction and migration rates of these dunes, which can pose a threat to the lagoon if they invade its space. The crest migration of 12 dunes was monitored by satellite images between July 2003 and December 2018, and DGPS topographic surveys were performed on five dunes between 2010 and 2018. The migration rates obtained were combined with an analysis of the meteorological data and calculations of the drift potential for eolian sediment transport. The wind regime in the study area shows a multidirectional pattern, with the predominant wind direction being from the NE, followed by the ENE direction. The wind direction also exhibits a seasonal behavior, with the winds from the first quadrant being dominant during spring and summer months and a gradual increase in winds from the second and third quadrants from the end of summer to winter. The dune crest migration rates in the Lagoa do Peixe National Park show an average of 16.55 m·yr<sup>−1</sup> towards WSW–W, mainly controlled by the direction of the effective winds. However, intense SSW–WSW winds caused by cold fronts in the past generate the reverse migration of dunes towards ENE–E. The reverse migration of dunes explains the steadiness of the dune fields at CPRGS and is a factor controlling dune stabilization and the geomorphological evolution of transgressive coastal dune fields. The article highlights the importance of monitoring dune movement to understand their responses to natural and anthropogenic stressors and to protect sensitive ecosystems. |
| first_indexed | 2024-03-11T00:42:05Z |
| format | Article |
| id | doaj.art-76aa8cee18d348549de22c2961f1c99e |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T00:42:05Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-76aa8cee18d348549de22c2961f1c99e2023-11-18T21:11:14ZengMDPI AGRemote Sensing2072-42922023-07-011514347010.3390/rs15143470Contribution of Reverse Dune Migration to Stabilization of a Transgressive Coastal Dune Field at Lagoa do Peixe National Park Dune Field (South of Brazil)Rogério Portantiolo Manzolli0Luana Carla Portz1Angela Fontán-Bouzas2Volney Junior Borges Bitencourt3Javier Alcántara-Carrió4Department of Geology and Geochemistry, Universidad Autónoma de Madrid, 28049 Madrid, SpainDepartment of Geology and Geochemistry, Universidad Autónoma de Madrid, 28049 Madrid, SpainDepartment of Geodynamics, Stratigraphy and Paleontology, Faculty of Geological Sciences, Complutense University of Madrid, C/José Antonio Novais, 12, 28040 Madrid, SpainInstituto do Meio Ambiente de Santa Catarina (IMA), Florianópolis 88020-300, BrazilDepartment of Geology and Geochemistry, Universidad Autónoma de Madrid, 28049 Madrid, SpainCoastal dunes that transgress typically move landward, while their reverse movement is not well understood. The article discusses the study of barchan and barchanoid dunes in the Lagoa do Peixe National Park in the coastal plain of Rio Grande do Sul, Brazil. The aim of the study is to analyze seasonal patterns and long-term trends in the direction and migration rates of these dunes, which can pose a threat to the lagoon if they invade its space. The crest migration of 12 dunes was monitored by satellite images between July 2003 and December 2018, and DGPS topographic surveys were performed on five dunes between 2010 and 2018. The migration rates obtained were combined with an analysis of the meteorological data and calculations of the drift potential for eolian sediment transport. The wind regime in the study area shows a multidirectional pattern, with the predominant wind direction being from the NE, followed by the ENE direction. The wind direction also exhibits a seasonal behavior, with the winds from the first quadrant being dominant during spring and summer months and a gradual increase in winds from the second and third quadrants from the end of summer to winter. The dune crest migration rates in the Lagoa do Peixe National Park show an average of 16.55 m·yr<sup>−1</sup> towards WSW–W, mainly controlled by the direction of the effective winds. However, intense SSW–WSW winds caused by cold fronts in the past generate the reverse migration of dunes towards ENE–E. The reverse migration of dunes explains the steadiness of the dune fields at CPRGS and is a factor controlling dune stabilization and the geomorphological evolution of transgressive coastal dune fields. The article highlights the importance of monitoring dune movement to understand their responses to natural and anthropogenic stressors and to protect sensitive ecosystems.https://www.mdpi.com/2072-4292/15/14/3470coastal dunebarchan dunesediment transportdrift potentialmigration rate |
| spellingShingle | Rogério Portantiolo Manzolli Luana Carla Portz Angela Fontán-Bouzas Volney Junior Borges Bitencourt Javier Alcántara-Carrió Contribution of Reverse Dune Migration to Stabilization of a Transgressive Coastal Dune Field at Lagoa do Peixe National Park Dune Field (South of Brazil) Remote Sensing coastal dune barchan dune sediment transport drift potential migration rate |
| title | Contribution of Reverse Dune Migration to Stabilization of a Transgressive Coastal Dune Field at Lagoa do Peixe National Park Dune Field (South of Brazil) |
| title_full | Contribution of Reverse Dune Migration to Stabilization of a Transgressive Coastal Dune Field at Lagoa do Peixe National Park Dune Field (South of Brazil) |
| title_fullStr | Contribution of Reverse Dune Migration to Stabilization of a Transgressive Coastal Dune Field at Lagoa do Peixe National Park Dune Field (South of Brazil) |
| title_full_unstemmed | Contribution of Reverse Dune Migration to Stabilization of a Transgressive Coastal Dune Field at Lagoa do Peixe National Park Dune Field (South of Brazil) |
| title_short | Contribution of Reverse Dune Migration to Stabilization of a Transgressive Coastal Dune Field at Lagoa do Peixe National Park Dune Field (South of Brazil) |
| title_sort | contribution of reverse dune migration to stabilization of a transgressive coastal dune field at lagoa do peixe national park dune field south of brazil |
| topic | coastal dune barchan dune sediment transport drift potential migration rate |
| url | https://www.mdpi.com/2072-4292/15/14/3470 |
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