Experimental investigations of the bed evolution in wave flumes: Performance of 2D and 3D optical systems |
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Authors: | Enrico Foti Ivan Cáceres Rabionet Alberto Marini Rosaria E Musumeci Agustín Sánchez-Arcilla |
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Institution: | 1. Department of Civil and Environmental Engineering, University of Catania, V.le A. Doria 6, 95125 Catania, Italy;2. Laboratori d''Enginyeria Marítima, Universitat Politècnica de Catalunya, C/ Jordi Girona, 1-3 Edificio D1, Campus Nord (UPC), 0834 Barcelona, Spain |
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Abstract: | Optical systems can provide very accurate measurements of bottom morphology in wave flumes. However, it is often necessary, e.g. when laser scanners are used, to stop the experiments and disturbing significantly the sandy bed itself, by emptying the flume. In the present work measurement strategies based on computer vision techniques which permit measurements also in the presence of water are applied in wave flumes at small and at large scale. Such techniques, based on the use of structured light, are demonstrated to be able to perform measurements of 2D and 3D bed evolution also in a very active area, such as the swash zone, where the alternating presence and absence of water makes it difficult to recover the bed morphology in a dynamic way. |
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Keywords: | Optical measurements Structured light Stereo vision Morphodynamics Swash zone |
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