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ANÁLISE DAS MUDANÇAS MORFOLÓGICAS COSTEIRAS DE MÉDIO PERÍODO NA MARGEM LESTE DA ILHA DE MARAJÓ (PA) EM IMAGEM LANDSAT

2003; Sociedade Brasileira de Geologia; Volume: 33; Issue: 2 Linguagem: Inglês

10.25249/0375-7536.200333s2127136

ISSN

2177-4382

Autores

Carmena Ferreira de França, Pedro Walfir Martins e Souza Filho,

Tópico(s)

Coastal and Marine Management

Resumo

Multi-date Landsat satellite data showed that during the last 15 years the coastal changes in the Eastern margin of the Marajó Island is mainly subject to retrograding processes. The retrograding areas compute 0.89 km 2 (1986/1995) , 0.381 km 2 (1995/1999) e 0.751 km 2 (1999/2001); while prograding areas measure 0.214 km 2 (1986/1995), 0.321 km 2 (1995/1999) e 0.086 km 2 (1999/2001). The coastal changes related to accretionary forms are associated to mangrove and beach-barrier development; while erosional features are related to mud terraces, coastal cliffs and mud deposits overlain by beach sands. Use of remote sensing in the study of the mid-term coastal changes constitutes one of the most important tools to record, monitor, map and compare areas in different sites and subject to shoreline retreat and accretion during the last decades.

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