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| Flow and sediments under random waves: experimental study for rippled beds Delgado Blanco, M.R. (2006). Flow and sediments under random waves: experimental study for rippled beds. PhD Thesis. Katholieke Universiteit Leuven (KUL): Leuven. ISBN 90-5682-738-3. XX, 203 + appendices pp.
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Thesis info:
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| Beschikbaar in | Auteur |
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| Documenttype: Doctoraat/Thesis/Eindwerk | |
| Trefwoorden |
Models Properties > Surface properties > Roughness > Bed roughness Research > Experimental research Ripples (sand) Transport > Sediment transport Water flow Water waves Marien/Kust |
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| Abstract |
Roughness is one of the major sources of error in sediment transport models in sandy nearshore areas, where the action of random waves is a dominant hydrodynamic feature. In this thesis, two types of roughness are investigated. First, the apparent roughness resulting from the interaction between waves and currents is studied. Yet, most of the work is devoted to the investigation of ripple roughness and the effect of different wave spectra, including double peaked spectra, on ripple geometry and dimensions and on the resulting suspended sediment profiles. The key tool is the use of full scale and reduced scale laboratory facilities. Measurements are investigated by combining existing knowledge and data with mathematical tools including engineering models for ripple prediction.As a result, a better understanding of the reciprocal interaction between flow and roughness is achieved. In addition, a new comprehensive model for the interpretation of rippled beds is presented. The high natural variability of the elements investigated in this thesis, in particular of the bed roughness, requires further research in order to quantify the resulting uncertainty and to determine if the accuracy of current sediment transport models can be significantly improved. |
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