The physical processes influencing morphodynamics in braided rivers: A case study on the Ayeyarwady River

The Ayeyarwady River is a river with large hydrological variations and an abundance of relatively fine non-cohesive sediment, causing the dynamic behaviour of the river with fast shifting channels. This dynamic behaviour, together with the large hydrological variations, is the source of a frequently flooding river with a moderate navigability....

Waves arising from Hirano’s conservation model for mixed-size sediment morphodynamics: An experimental study

River bed degradation is sometimes counteracted with nourishment of sediment material. Numerical models — which include Hirano’s sediment continuity model for mixed-size sediment — can be used to predict the transport of different sediment fractions (the waves due to spatial variations in the grain size distribution of the bed material are here...

Morphological modelling with suspended sediment transport in river bends

Depth-averaged morphological computations using Delft3D tend to produce ‘strange’, results for river bends when the sediment transport formulas of Van Rijn are used. Even pools in inner bend regions and bars in outer bend regions can result from the model. The objective of the present thesis is to identify the cause of the problem and propose...

Morphological modelling of the Atrato river delta in Colombia

The Colombian government aims to establish a connection that bridges the Atlantic Ocean and the Pacific Ocean. The new connection will largely take place on the current Atrato River, which has not yet been upgraded for a more extensive use of navigation in the near future. A bottleneck in the river is the delta area. Without structural dredging...

Hydrodynamics and morphodynamics of a seasonally forced tidal inlet system

Tidal inlets along the central coast of Vietnam are highly dynamic and variable under the influence of seasonal climatic regime. The strong episodic processes of river flow and wave action cause the inlet morphologies to be changed frequently and unpredictable. Despite the interests and research on tidal inlets have been growing in recent...

Voorspelinstrument duurzame vaarweg: Reducing computation time

Point Bar Development and Vegetation Succession on the Volga-Akhtuba Floodplain, Russia

The 'Room for the River' strategy for Dutch river management asks for more information about morphodynamics and vegetation succession in natural rivers. In order to obtain such information, the Lower Volga River in Russia is chosen as a natural reference river for the Dutch Waal River. Objective of the project Morphodynamics Lower and Waal is to...

Morphodynamic development of secondary channel systems along Rhine branches in the Netherlands