Diagnostic modeling of the shoreline variation along the Jiangsu Coast, China

Intertidal flats are of great socio-economic and ecological importance in defending the coastal cities from flooding, providing resources for land reclamations and habits for wildlife. On the intertidal flats, milder profiles are usually featured with finer sediment. However, we find the opposite relationship between the alongshore variation in...

The Existence and Origin of Multiple Equilibria in Sand-Mud Sediment Beds

The sediment composition of the seabed governs its mobility, hence determining sediment transport and morphological evolution of estuaries and tidal basins. Bed sediments often consist of mixtures of sand and mud, with spatial gradients in the sand/mud content. This study aims at increasing the understanding of processes driving the sediment...

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...

Bed composition generation for morphodynamic modeling: Case study of San Pablo Bay in California, USA

Applications of process-based morphodynamic models are often constrained by limited availability of data on bed composition, which may have a considerable impact on the modeled morphodynamic development. One may even distinguish a period of “morphodynamic spin-up” in which the model generates the bed level according to some ill-defined initial...

On the propagation of a disturbance in the bed composition of an open channel

The transport of a sand mixture is more complicated than that of uniform sand, because the transport velocity of a grain is varying with the grain size. And in case of sand mixture, the change of composition of mixture in addition to the change of bed height according to the change of boundary conditions occurs. It is very important from the...