Reconstrucción cuantitativa de la morfodinámica fluvialmediante LiDAR y GPS diferencial: La rambla de la viuda (Castellón, España)
- Autores: M. Calle, Petteri Alho, Xavier Rodríguez Lloveras, Antero Kukko, Harri Kaartlnen, Gerardo Benito Ferrández
- Localización: Avances de la Geomorfología en España 2012-2014 / coord. por Susanne Schnabel, Álvaro Gómez Gutiérrez, 2014, ISBN 978-84-617-1123-9, págs. 279-282
- Idioma: español
- Títulos paralelos:
- Quantitative reconstruction of the geomorphological variability in fluvial systems using LiDAR andGPS: The Rambla de la Viuda ephemeral River (Castellón, Spain)
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Resumen
Geomorphological analyses have been always pursuing quantitative reconstructionsdue to theclose relationship withsculpting processes.Many techniques such as aerial photography mapping, GPS or laser scanner-based topography can be applied to quantify 1D, 2D or 3Dgeomorphological changes. An integration of these techniques has been used to estimate volumetric changes in a Mediterranean ephemeral river named “Rambla de la Viuda” (Castellón, Spain). The studied reach, whose riverbed ismainly composedbygravelly sediments, is subjected to intense gravel mining.The last significant variation in the river’sbedform morphology took place in March 2013 during a low magnitude flood (maximum discharge recorded: 22m3s-1). Photographs, GPS and LiDARsurveys, and gravel size measurementswere obtained prior and after the flood. As consequence of the flow, two new transversal gravel bars were developed mainly two composed by gravel particles of 18-20 mm (D50) and 38-40 mm (D90), with anestimatevolume increase of 800 m3. This morphodynamic assessment shed light not only on the response of Rambla de la Viuda to low-range run-off, but also the better understanding of geomorphic work by low magnitude floods in Mediterranean ephemeral rivers.
