Physical and numerical modelling of the erosion of a fluid mud layer due to entrainment

The subject of this master thesis is to present the processes taking place at the erosion of a fluid mud layer due to entrainment, to carry out experiments in an annular flume and compare the results of these experiments with a numerical model, which has been elaborated at the TU Delft. The report can be devided into five parts: physical and...

Experimental study of blockage of random waves by counter currents

From February to April 1999, wave-blocking experiments have been conducted at the Laboratory of Fluid Mechanics of the Faculty of Civil Engineering and Geosciences, Delft University of Technology, The Netherlands as a part of the Ph.D. research of I.K. Suastika. Wave blocking is a special case of wave-current interaction. It can occur when waves...

Sedimentation reduction and check dam design in the Cilalawi River

An overdose of sediment from the Cilalawi River is going into the reservoir Waduk Jatiluhur. This is resulting in the problem of reservoir capacity reduction. With water still coming from different rivers, the future will be inundation. In this matter the recommendation for this problem is check dam(s) and changing land use, stated by the local...

Process-based modelling of the Maumusson inlet: Interaction between inlet, ebb-delta and adjacent shoreline

In 2010, a realignment of the main channel of the Maumusson inlet, France, is observed. This breach of the ebb-delta is observed not long after a severe storm that afflicted the Charente-Maritime region in February 2010; Xynthia. A strong link between the breach and the Xynthia storm is expected: a storm event driven breach. In order to assess...

Simulating and classifying large-scale spatial sand-mud segregation using a process-based model for a tidal inlet system

Tidal inlet systems, as found in the Dutch Wadden Sea, often feature both sand and mud. Due to differences in sediment properties, sand and mud particles respond different to identical forcing conditions, like short waves and tidal currents. Because of this, sand and mud can get transported to different locations. This process is referred to by...

Morphological analysis of the beach at the Brouwersdam

This thesis focusses on the north-eastward shifting beach at Brouwersdam, which poses a problem for users and stakeholders of the beach. This trend is likely to continue in the foreseeable future and could result in a beach that can no longer fulfil its current functions, like recreation and tourism. Analysis of bathymetric data from the last...

Impact Modelling of Hurricane Sandy on the Rockaways: Relating high-resolution storm characteristics to observed impact with use of Bayesian Belief Networks

Hurricane Sandy (2012), which made landfall in New Jersey on October 29th, made devastating impact on the East Coast of the USA and struck major parts of New York City, including the economic centre of Manhattan. The total damage (in the USA and Caribbean) is in excess of 100 billion US$ with estimates ranging between 78 and 97 billion US$ for...

Modelling far-field dredge plume dispersion

By its very nature dredging is an environmental impact, since dredging includes the excavation and/or relocation of sediment in a river, sea or estuary. One of the environmental impacts related to dredging is increased suspended sediment concentration (SSC) levels, forming plumes of sediment. These so called dredge plumes originate from spillage...

Long-term bio-geomorphological modelling of the formation and succession of salt marshes

The interaction between vegetation and the morphodynamics is considered to be an important process in salt marsh formation and succession. Therefore, the contribution of vegetation modelling on the long-term morphological development of salt marshes is assessed by implementing a vegetation growth model in the morphodynamic modelling software...

Modelling of Grain Sorting Mechanisms in the Nearshore Area for Natural and Nourished Beaches

In this study a modelling approach was investigated that takes into account the effect of short wave grouping on long wave motions, calculating sediment transport and morphology with multiple fractions and a layered bed stratigraphy. After extensive testing and validating this model using data collected in a wave flume in Hannover this model was...

Numerical modelling of the growth of offshore sand waves: A Delft3D study

Offshore sand waves of several meters high and hundreds of meters long are formed in shallow seas due to the tidal currents. These sand waves can, amongst others, influence the burial depth of cables of offshore wind farms and obstruct navigation channels. For the Far Large Offshore Wind programme (FLOW), one of the goals of Deltares is to...

Sand Closure Bintan Bay

In the region of the Riau Islands of Indonesia fresh water scarcity is one of the challenges the local community is facing. In order to increase the catchment of fresh water the choice is made to turn Bintan Bay, part of the Riau Islands, into a fresh water reservoir. Hereby collecting the fresh water runoff from local rivers. It is however...

Sand wave dynamics: Bedform analysis and dredging strategy design for South Channel, Melbourne, Australia

The study into sand wave dynamics in South Channel has commenced after large dune forms were observed in monitoring campaigns following the channel deepening project of the Port of Melbourne. The project involved deepening of the harbour berths and channels, but more importantly, it involved the deepening of South Channel in Port Phillip Bay....