Morfogênese e geodinâmica das dunas costeiras de Canoa Quebrada, Ceará, Brazil
This paper presents an analysis of geodynamic and morphogenesis of the dune field in the Canoa Quebrada region, located in the municipality of Aracati, inserted in the state of Ceará. It covers the area formed by fluvial-marine plain, the strip of beach and dune field located on the right bank of th...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1999 |
| País: | Brasil |
| Recursos: | Universidade Federal do Ceará (UFC) |
| Repositorio: | Repositório Institucional da Universidade Federal do Ceará (UFC) |
| Idioma: | portugués |
| OAI Identifier: | oai:repositorio.ufc.br:riufc/64597 |
| Acesso em linha: | http://www.repositorio.ufc.br/handle/riufc/64597 |
| Access Level: | acceso abierto |
| Palavra-chave: | Dunas costeiras Geodinâmica Morfogênese de dunas |
| Resumo: | This paper presents an analysis of geodynamic and morphogenesis of the dune field in the Canoa Quebrada region, located in the municipality of Aracati, inserted in the state of Ceará. It covers the area formed by fluvial-marine plain, the strip of beach and dune field located on the right bank of the mouth of the river Jaguaribe. The estimated period corresponds to the dynamic analysis of the dune field based on migration rates from 1988 to 2013. The objectives are to analyze the environmental dynamics of the mobile dune field towards the mangrove ecosystem located at the mouth of the river Jaguaribe. Associated with the methodological approach, we analyzed through GIS aerial photographs of the 80 on the scale of 1: 25,000 and 2004, 2010 and 2013 years of Quickbird satellite images. We find mobile dunes of the longitudinal type, barcanoids and sand sheets. Semi-fixed dunes were identified in the contact with the mangrove ecosystem. As for dune generations, we can say that dominates the generation D1, characterized by the occurrence of present-day dunes. In the contact with the mangrove ecosystem, the semi-fixed dunes combine with older dunes to define the existence of D2 generation. The average migration of the dune field during that period of 40 years was 7m / year. In the years 2010-2013, virtually no migration occurred, but the dunes continue to move towards the mangrove ecosystem. |
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