Remote sensing intertidal elevation in cádiz Bay, SW Spain | Evaluación del método de línea de agua para la creación de un modelo digital del terreno de áreas intermareales en el interior de la Bahía de Cádiz, SO de España
2012
Morris, Edward P. | Plomaritis, Theocharis A. | Rangel, N. | Oliveira d’Él Rei Pinto, D. de | Peralta, G.
Trabajo presentado en el III Simposio Internacional en Ciencias del Mar (ISMS12), celebrado en Cádiz del 24 al 26 de enero de 2012.
Afficher plus [+] Moins [-]Digital elevation models (DEM) of intertidal areas are important in a number of applications (ecological modelling, geomorphodynamics, sea-level change). However, field measurements of height profiles can be difficult to collect (either on foot or using a boat) and advanced airborne methods (such as LIDAR) can be rather expensive. We evaluate the use of freely available remote sensing (RS) images (LANDSAT 5TM) to derive a DEM for intertidal areas within Cádiz Bay. Waterlines were extracted from 12 images over a period of 18 months (2009 to 2011), representing different stages of the tide (measured in Cádiz Port). These contour lines were used to construct a DEM via kriging. RS-derived topography was compared to transects of shore height measured using a dGPS. The waterline method applied to LANDSAT 5TM images offers a cheap and quick way to derive a reasonably accurate DEM within intertidal areas. The method can be semi-automated and is generally suitable for low-energy zones, where large waves are infrequent, the topography is relatively stable and not very abrupt.
Afficher plus [+] Moins [-]Peer reviewed
Afficher plus [+] Moins [-]Mots clés AGROVOC
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