Global Assessment on the Lifetime of Mega Nourishments

Recently an innovative nourishment method has been applied as a counter measure for coastal recession in the Netherlands. This soft engineering solution, also known as the Sand Engine, consists of a shoreline perturbation of $21.5$ Mm\textsuperscript{3} sand which will be redistributed along the shore by the natural forces of waves, tides and...

Cross-shore Velocity Moments in the Nearshore: Validating SWASH

The cross-shore sediment transport is of great importance in the coastal water since it may lead to significant change of coastal profile. Many researches have proved that the sediment transport is proportional to velocity moments. In this study, the velocity moments under wave action in the perpendicular direction to the coastline are studied...

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...

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...

Stability of open granular filters under wave loading

A filter can be applied to protect a bed against scour. Normally, these filters are geometrically closed, to prevent winnowing of the base material through the filter. However, geometrically closed filters are expensive and difficult to realize in the field. Geometrically open filters can serve as an alternative. Within an open filter, the pores...

The effect of a dragging anchor on a horizontal layer of rockfill

In the context of the project "Widening of the Juliana Canal" a bottom protection layer is designed by dredging contractor de Vries & Van de Wiel Kust en Oeverwerken. Because part of the channel is embedded in gravel type soil layers and lies above ground water level, a water repellent function of this layer is necessary to prevent seepage.In...

Protection of Shanghai from Flooding: 'Open or closable navigational section?’

Due to Shanghai’s unique location, it is sensitive to sea level rise and land subsidence, which are directly related to urban flood protection. Flooding of Shanghai can be caused due to the following three factors: storm surge by typhoon, high tidal levels and sustained higher water levels in the Yangtze River and the Huangpu River as a result...

Safety Assessment Method for Indirect Failure Mode Flow Sliding

Flow sliding of submerged slopes in front of dikes affects flood safety. The occurrence of flow sliding may result, sometimes with delay, in a failure mode and consequent flooding. The current safety assessment method for flow sliding does not consider the interaction between flow sliding and failure modes. Therefore it is unclear whether the...

The feasibility of standardization of a mono-pile mooring facility for FSRU's

As the LNG market continues to grow internationally, Floating Storage and Regasification Units (FSRU’s) have become an increasingly important component as governments and private companies strive for faster, cheaper and more flexible means of re-gasifying. In order to have a FSRU mooring system which is equally fast deliverable, standardization...

Wave runup on atoll reefs

The aim of this research was to take the first step in understanding the wave runup process on an atoll reef using the XBeach model. Field data collected from 3 November 2013 to 13 April 2014 at Kwajalein Atoll in the Republic of the Marshall Islands was used. The dataset included data on bathymetry, waves, water levels and wave-induced runup....

The impact of a breach in the Afsluitdijk on the probability of failure of IJsselmeer dikes

At the moment, for determining the safety of the dike ring areas around the IJsselmeer a possible failure of the Afsluitdijk is assumed to have no influence on loads occurring on the IJsselmeer dikes. As failure of the Afsluitdijk is always possible, the consequences of such a failure should be investigated. The objective of this thesis is to...

Ecosystem-based port design: An approach for sustainable port development

The world population is growing. Together with the population, the need for resources is growing, as is the need for the transportation of these resources. A significant part is carried out through marine transport, directly relating to the increasing need for port development. All over the world, a shift increasingly occurs towards applying...

An interdisciplinary process-based framework for sandy coastal developments

The aim of this research was to develop an interdisciplinary framework suitable for engineering purposes that connects natural processes such as wave propagation, aeolian transport, oxidation process or chemical reactions with associated critical measurable (a)biotic parameters like a rip current, beach width, canopy height density, salinity...

Cost-effective levee design for cases along the Meuse river including uncertainties in hydraulic loads

After the flood of 1993 and 1995 in the Netherlands, flood risks in Limburg became an important discussion. Each flood defence system along the river Meuse needs to be provided with a safety level with an annual failure probability of 1/250. In the nearby future a new safety philosophy will be introduced, entailing new safety norms and...

Potential Measures to reduce Fluvial and Tidal Floods in the Pampanga Delta, Philippines

The Pampanga and Angat River Delta, located on the northern side of the Manila Bay in a large alluvial plain, are regularly confronted with worsening fluvial and tidal floods. Subsidence rates up to 4.5 cm/year due to excessive groundwater extraction are the main cause of the worsening floods. Five measures are presented to reduce the floods: -...

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...

Capaciteitsanalyse van de Prinses Margrietsluis in Lemmer

Dit rapport geeft een capaciteitsanalyse van de Prinses Margrietsluis in Lemmer (Friesland). De sluis met één kolk geeft toegang tot het Prinses Margrietkanaal / de Hoofdvaarweg Lemmer-Delfzijl en vormt de op één na belangrijkste verbinding voor de recreatievaart tussen het IJsselmeer en de Friese Meren. Een relatief hoog aandeel van de 40.000...

Flow beneath inland navigation vessels

Growing transportation rates and the subsequent growth in inland waterway transport have led to an increase in inland vessel sizes and draught. Due to the fluctuating water levels on rivers and these increasing draughts, the distance between the river bed and the ships are decreasing. Rijkswaterstaat wants to know the effects of sailing at these...