Mudanças morfológicas na linha de costa das praias de Almofala e da Barreira em médio período (1958-2004) utilizando técnicas de sensoriamento remoto

Abstract

The coastal line to Almofala and Barreira beachs (Itarema, Ceará, Brazil) haved much changes, to geographic position, along by 46 years period (1958-2004). This area include Almofala and Barreira Beachs, conditioned for high temperatures and media raining 1200mm, with plateous under alluvial plain, estuarine plain, sandy plain with coastal sandy dunes, beachs and sandy terraces. The methodology consisted: (1) collection multi-temporal airborne photography’s (1:32.500 and 1:25.000 scales) and spectral and spatial resolution to Quickbird satellite images ortho-retificatied (2004); (2) the airborne photography was georeferenced for control points extracted Quickbird images; (3) integration to visual interpretation to Quickbird satellite images (2004) and airborne photography’s (1958-1988); (4) progration and retrogradation mapping, in scale 1:50000. The analyses indicated a major intensity to shoreline erosion process: (1) retrogradation of -958255,05 m²/46years (1958/2004) (54,3%); and (2) progradation by 805299,48m² (1958/2004) (45,7%).