Detection of Submerged Sand Bars in the Ebro Delta Using ASTER Images

Abstract

Deltas are complex systems that can be affected by the alteration of any factors that interfere in their dynamic. Knowledge of these systems allows managers and scientists to model and establish the ecosystem state. This study is focused on the sand bars located in the Ebro delta coast. These sand bars constitute a natural sediment deposit to protect the beaches from wave erosion. Over the last 20 years, their detection has been based on the record of the maximum intensity shown by waves breaking over them. The methodology uses satellite images to detect the sand bars depending on the pixel value. Although is not possible to validate the results, their coherence allows where new investigation lines to be explored. The methodology used will allow increased frequency of monitoring in large areas while reducing costs.