Laser scanning method to characterize bed arrangement and its influence on incipient motion of gravel sediments
| Autor: | Perret, E., Berni, Céline, Herrero, A., Camenen, B., El Kadi Abderrezzak, K., Buffet, A. |
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| Přispěvatelé: | Irstea Publications, Migration, Hydrologie-Hydraulique (UR HHLY), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), EDF (EDF) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | River Flow conference River Flow conference, Jul 2016, St Louis, Missouri, United States. pp.7 |
| Popis: | International audience; A very large scatter has been observed for the incipient motion threshold of a gravel bed in lit-erature, which can be explained by a lack of bed surface characterization. In the present work, a laser scan-ning technique is used and criteria to describe the bed surface are proposed in order to compare initial bed ar-rangements of laboratory tests on graved bed incipient motion. Statistical tools, such as probability density function of the bed surface elevations and two-dimensional (2D) structure function, are used to characterize the bed surface. Surveys of relatively well-sorted gravel bed surfaces show that even small bed arrangement changes yield a significant impact on the incipient motion of the gravel particles |
| Databáze: | OpenAIRE |
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