Estimativa da taxa anual e sazonal do transporte longitudinal sedimentar na zona costeira do litoral oriental do Rio Grande do Norte
In the State of Rio Grande Norte, coastal erosion events along the coastline have intensifi ed over the past few decades. The main sectors aff ected by coastal erosion have this phenomenon attributed, especially to the reduced fluvial contribution of sediments, due to the small dimensions of region...
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| Principais autores: | , , , |
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| Formato: | article |
| Idioma: | pt_BR |
| Publicado em: |
Revista Brasileira de Geomorfologia
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/30233 |
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| Resumo: | In the State of Rio Grande Norte, coastal erosion events along the coastline have intensifi ed over the past few
decades. The main sectors aff ected by coastal erosion have this phenomenon attributed, especially to the reduced fluvial contribution of sediments, due to the small dimensions of regional river basins, with frequent artifi cial dams, and the development of dune fi elds resulting from the loss of sediment from beaches toward the continent. However, knowledge of the wave climate and the rate of sediment transport occurring in the coastal range are fundamental factors in studies on coastal erosion. This work addressed as an area of interest the coastal region of Barreira do Inferno and adjacent beaches, located in sector south of the capital, Natal /RN. The main objectives focused on (i) evaluating interpolating methods to estimate the infl uence of bathymetry on the defi nition of longitudinal sediment transport (LST); (ii) through the computational package SMC-Brazil, model the physical processes of generation, propagation and modifi cation of the wave climate, in order to distinguish hydrodynamics of the study area; (iii) estimate LST from the formulation of Bayram et al. (2007). The results showed that the wave climate in the coastal region of Barreira do Inferno has a higher trend of waves from E and ESE. The potential of annual LST is around 50,000m³/year in the South-North direction. The rainy season (june, July and August) is the most contributing to annual average transportation, combined with the continent largest sediment contribution towards the coastal zone |
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