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da Silva, A., Vital, H.. Estimation of Presidio´s Barrier Island (Guameré-NE/Brazil) Migration by Means of GIS and Remote Sensing. In: Schwarzer, K., Schrottke, K., Stattegger, K. (eds.). From Brazil to Thailand - New Results in Coastal Research. Coastline Reports (16), pp. 45-48. EUCC - Die Küsten Union Deutschland e.V., Rostock, 2010.


Coastal zone occupation has been increasing in the last decades, which has caused an expressive rise in the density of coastal zone population. A relative rising in mean sea level has provided a diminution on the coastal zone land area. Barrier islands have been used for habitation and entertainment purposes, and they also represent a natural protection to the coast acting as a shelter for the coastline against wave and tide action.

In this sense a spatio-temporal triennial analysis, using satellite images, was done for NE Brazil. The images were obtained from CBERS, satellite dated from 14/08/2004, 13/08/2005 and 09/03/2006. They main goal of this study is to quantify the progradation of Presidio’s barrier island (Guamare-RN, NE Brazil) during the period from 2004 - 2006. Approximately 200m/year was the progradation observed for the referred island, pointing out high morphodynamic process for this region. Attached to the progradation, a shoreline retreat was observed at the area adjacent to the West extremity of the island. The total retreat measured was around 130m.
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