On the redistribution and sorting of sand at nourishments: Field evidence and modelling of transport processes and bed composition change

Increasingly large sand nourishments are used for the maintenance of sandy coasts around the world. There is, however, still very limited understanding of their behaviour (i.e. redistribution) and effects on the marine environment. This PhD thesis explores the morphological reshaping of shoreface nourishments (i.e. long bunds of sand placed at...

Observations and modelling of shoreface nourishment behaviour

Shoreface nourishments are commonly applied for coastal maintenance, but their behaviour is not well understood. Bathymetric data of 19 shoreface nourishments located at alongshore uniform sections of the Dutch coast were therefore analyzed and used to validate an efficient method for predicting the erosion of shoreface nourishments. Data shows...

Sediment sorting at the Sand Motor at storm and annual time scales

Bed sediment composition, with a focus on the median grain size D₅₀, was investigated at a large-scale nourishment (The ‘Sand Motor’) at the Dutch coast (∼21.5 million m³ sand). Considerable alongshore heterogeneity of the bed composition (D₅₀) was observed as the Sand Motor evolved over time with (1)...