Classificação das variações morfodinâmicas e processos costeiros, praia do Paiva, PE, Brasil
The coastal zone related to the continental and oceanic portions, considered as dynamic and complex, undergoes changes at diff erent time scales. The morphodynamic classifi cations of beaches are essential for monitoring sedimentary cycles, identifying temporal processes of stability, accretion and...
| Authors: | , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2020 |
| Country: | Brasil |
| Institution: | Universidade Federal do Ceará (UFC) |
| Repository: | Repositório Institucional da Universidade Federal do Ceará (UFC) |
| Language: | Portuguese |
| OAI Identifier: | oai:repositorio.ufc.br:riufc/61411 |
| Online Access: | http://www.repositorio.ufc.br/handle/riufc/61411 |
| Access Level: | Open access |
| Keyword: | Mapeamento Morfodinâmica Zona Costeira |
| Summary: | The coastal zone related to the continental and oceanic portions, considered as dynamic and complex, undergoes changes at diff erent time scales. The morphodynamic classifi cations of beaches are essential for monitoring sedimentary cycles, identifying temporal processes of stability, accretion and erosion. The objectives of this study are to evaluate the morphodynamic classifi cation and the identifi cation of some coastal processes considering a spatial analysis (2010, 2011 and 2012) at Paiva beach, located at Cabo de Santo Agostinho, Recife metropolitan region, Pernambuco state, Brazil. For this, we used three-dimensional information from the digital terrain model obtained by Global Navigation Satellite Systems, as well as hydrodynamic data (wave climate). The results showed the identifi cation of berms, cusps and rip channels besides three morphodynamic stages during diff erent dates, being them: transverse bar and rip; rhythmic bar and low tide terrace. The waves have E, ESE and SE direction with signifi cant wave height ranging from 1.61 to 3.39 m with 9.3 s of average wave period. The temporal profi les showed signifi cant variations, demonstrating accretion and erosion processes, which varied around 1 m (vertically) in the spreading zone. The sedimentary balance evaluation showed accretion in the spring and summer periods and erosion from autumn to winter. The mapped features proved to be eff ective for the proposed morphodynamic classifi cation, generating important subsidies for coastal zone monitoring |
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