Monitoring the Cresmina dune evolution (Portugal) using differential GPS
| Autor: | Luís Paulo N. Rebelo, J. H. Monteiro, Pedro Oliveira Brito |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Journal of Coastal Research. 36:591-604 |
| ISSN: | 1551-5036 0749-0208 |
| DOI: | 10.2112/1551-5036-36.sp1.591 |
| Popis: | The Cresmina dune is a transgressive loose sand body of approximately 300m wide by 230m long, that is moving from NNW to SSE along the Guincho-Oitavos dunefield. This dunefield, located near Cascais, in the west coast of Portugal, can be classified as an headland bypass dunefield. The sand enters the system from two beaches at north, migrates on top of a marine abrasion platform, cut into cretaceous hard rocks, returning to the sea at south. In order to determine the trend of evolution, the advance rate and the resultant sand drift that is occurring, a four year campaign (2000–2004) for monitoring the precipitation ridge of the transgressive dune and the contiguous area, is being carried out with one detailed topography survey per year. Topography surveys are made using a Trimble DGPS with 1.5cm and 2.5cm of horizontal and vertical accuracy respectively. ArcView GIS is used to process the data and display the results. Because subtraction of 3D surfaces relative to different years is our goal, a v... |
| Databáze: | OpenAIRE |
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