| Revista: | Anais da Academia Brasileira de Ciencias |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000400428 |
| ISSN: | 0001-3765 |
| Autors: | Guimaraes, Pedro V1 Pereira, Pedro S2 Calliari, Lauro J1 Ellis, Jean T3 |
| Institucions: | 1Universidade Federal do Rio Grande, Instituto de Oceanografia, Rio Grande, Rio Grande do Sul. Brasil 2Universidade Federal de Pernambuco, Departamento de Oceanografia, Recife, Pernambuco. Brasil 3University of South Carolina, Department of Geography and Marine Science Program, Columbia, Carolina del Sur. Estados Unidos de América |
| Any: | 2016 |
| Període: | Sep |
| Volum: | 88 |
| Número: | 3 |
| Paginació: | 1357-1370 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico, descriptivo |
| Resumen en inglés | The backshore zone is transitional environment strongly affected by ocean, air and sand movements. On dissipative beaches, the formation of ephemeral dunes over the backshore zone plays significant contribution in the beach morphodynamics and sediment budget. The aim of this work is to describe a novel method to identify ephemeral dunes in the backshore region and to discuss their morphodynamic behavior. The beach morphology is identified using Argus video imagery, which reveals the behavior of morphologies at Cassino Beach, Rio Grande do Sul, Brasil. Daily images from 2005 to 2007, topographic profiles, meteorological data, and sedimentological parameters were used to determine the frequency and pervasiveness of these features on the backshore. Results indicated that coastline orientation relative to the dominant NE and E winds and the dissipative morphological beach state favored aeolian sand transport towards the backshore. Prevailing NE winds increase sand transportation to the backshore, resulting in the formation of barchans, transverse, and barchanoid-linguiod dunes. Precipitation inhibits aeolian transport and ephemeral dune formation and maintains the existing morphologies during strong SE and SW winds, provided the storm surge is not too high |
| Disciplines | Geografía |
| Paraules clau: | Geografía física, Dunas costeras, Transporte eólico, Arena, Procesos de playa, Percepción remota |
| Keyword: | Geography, Physical geography, Coastal dunes, Aeolian transport, Sand, Beach processes, Remote sensing |
| Text complet: | Texto completo (Ver HTML) |
