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...

Understanding and modeling the process of resuspension of fines in the coastal zone; case Khalifa Port

=Introduction= Worldwide there is an increasing amount of dredging activities, due to increasing demand for transport of goods over the world. These project are more and more near sensitive nature reserves and thereby a potential threat of biodiversity; which is a major concern for port developers, authorities, environmental organizations and...

Assessing the Influence of Suspended Sediment on Effective Hydraulic Roughness from Tidal Damping Aspect: A Study Based on Yangtze River Estuary

The objective of this project is to assess the influence of suspended sediment on hydrodynamic properties in the study area from tidal damping aspect. Firstly, through conducting tidal amplification factor analysis based on real time measured data, seasonal variation in sloping tendency has been observed. The difference in sloping tendency...

Probabilistic design of settling basins for environmental compliance: Development and evaluation of a risk-based approach

The environmental impacts caused by suspended sediments are an important issue in the environmental impact assessment (EIA) of dredging and reclamation projects. This thesis is restricted to provide insight into the emission of suspended sediment particles due to the release of return water. This water is used to pump dredged material to the...

The influence of grading on concentration calculations

The main objective of this study is: investigation of the influence ofthe composition of the bed material on the composition of the suspended material at the reference level and on calculating the reference concentration, based on recent measurements. This objective was achieved by a study of literature, the investigation of data from six...

Equilibrium bays - A numerical study after the behaviour ofequilibrium bays

At the present day, the far field impact of coastal structures can be simulated beforehand with the aid of numerical models. The consequences of new coastal defence schemes can be visualised before they are applied in reality. Therefore, the objective of this study is on the one hand, to investigate the capabilities of the numerical model...

Sediment mixing coefficient behaviour for different wave, current and sediment characteristics

During the last years, experimental research in the Large Oscillating Water Tunnel (L. O. W. T.) and the Vinje basin (both of Delft Hydraulics) is aimed at the understanding and mathematical description of the process of near-bed sediment transport induced by non-breaking waves. The understanding of the near-bed sediment dynamics is important...