Sediment transport processes in the ripple regime on the shoreface

Researchers:

Jebbe van der Werf


Jan Ribberink


Suzanne Hulscher


L.C. van Rijn (University of Utrecht)



Organisations:

University of Twente



Funding:

EU FP5 project SANDPIT



Period:

December 2001 – December 2005

Background and objectives

For the prediction of morphological impacts of large-scale sand mining on the shoreface and on the near-shore (coast) a thorough understanding and quantification of the controlling sand transport processes are required. Morphological simulation models are generally provided with sediment transport formulas, in which wave-induced sediment transport processes are not (sufficiently) accounted for. The present project is aimed at modelling of these processes in the ripple regime (moderate wave conditions) and is a follow-up of previous Ph.D. research projects, which were focussed at the sheet-flow regime (storm conditions). The objective is to improve our understanding of sediment transport processes in the ripple regime and to develop reliable, validated models for quantitative sediment transport predictions on the basis of new and existing data, both from the field and the laboratory. The basic element in the research is formed by new laboratory experiments in full-scale conditions in the large oscillating water tunnels of WL|Delft Hydraulics and the University of Aberdeen.

Publications

Van der Werf, J.J., A literature review on sand transport under oscillatory flow conditions in the rippled-bed regime, SANDPIT report, University of Twente, The Netherlands, 2003.

Van der Werf, J.J. & J.S. Ribberink, Wave-related sand transport in the ripple regime: experiments and modelling, Book of Abstracts Euromech Colloquium n. 451, pp 101-102, Taormina, Italy, 2003.

Van der Werf, J.J., Ripple regime experiments in the Large Oscillating Water Tunnel of WL|Delft Hydraulics, Data report experimental series T, U and V, SANDPIT report, University of Twente, The Netherlands, 2004.

Van der Werf, J.J. & J.S. Ribberink, Wave-induced sediment transport processes in the ripple regime, International Conference on Coastal Engineering, Lisbon, Portugal, accepted.