Knowledge in Building with Nature pilot projects: A Case Study of the Sand Engine

In this research, the creation, use and spread of knowledge acquired in Building with Nature pilot projects is researched, with the goal of providing recommendations to improve this use and spread in future Building with Nature pilot projects. To achieve this, a case study with the Sand Engine as the subject is performed. In addition to this, a...

Quantifying parameter uncertainty in predictions of coastal mega-nourishments: A case study on the Sand Engine at the Dutch coast

Continuous sea level rise and growing environmental awareness have led to increasing implementation of nature-based solutions to counter coastal erosion. An example in the Netherlands is the Sand Engine---a mega-scale sand nourishment designed to feed the Dutch coast over a period of 20 years. For such designs to work, a good understanding of...

Navigating Sand and Waves: On the evolution of sand ripples under combined wave and current conditions

Sand ripples are small (10 cm height) bed forms which occur in the nearshore and surf zone under the impact of both waves and currents. They impact the roughness of the bed used in models of this zone, and contribute to sediment transport. Predictions of their geometry are important to properly model roughness, so correlations between the waves...

Predicting the dune growth at a mega nourishment: By using a process based Integrated Hydro- Aeolian- Morphodynamic model.

The Sand Engine was constructed in 2011 with the main goal to enhance the natural dune growth. It is the first mega nourishment in the world comprising of 21.5 Mm³ of sediment. There is a large difference between the predictions of the dune growth (25 ha in 20 years) and the actual measurements (1 ha in 4 years). Therefore a more...

Macro-scale performance of a mega-feeder nourishment: Describing and predicting the long-term feeding performance

A mega-feeder nourishment is a concentrated nourishment that disperses over time due to wind, waves, and tide, and as a result ‘feeds’ its adjacent coasts. During the design phase of a nourishment, performance indicators can enable an objective comparison of a mega-feeder nourishment to alternative nourishment strategies, In the case of an...

The influence of the Sand Engine on the sediment transports and budgets of the Delfland coast: Analysis of bi-monthly high-resolution coastal profiles

The Sand Engine is a new innovation in coastal protection, a mega feeder nourishment. This pilot project was constructed in 2011 along the Delfland coast, which is historically prone to erosion. Since its construction, the Sand Engine is intensively being monitored to track the morphological development.<br/><br/>The objective of this thesis is...

Using a process-based model for dune safety assessment: A case study of Delfland with a 2DH XBeach model

With the implementation of new legal aspects for dune safety assessment in 2017, the current method, Duros+, is no longer feasible to represent the desired processes. This 1D deterministic, volume-balance model cannot simulate processes like inundation and overwash, which are crucial to fulfil the new requirements for dune safety assessment....

Global assessment of the potential effect of large sand replenishment on fresh groundwater resources

Sand replenishments, or nourishments, have been the prevalent strategy of the Netherlands for coastal protection since 1990. In consideration of the expected sea level rise and potential increases of storm surges as a result of climate change, an innovative pilot project known as the ‘Sand Engine’ has been implemented. In contrast with...

Nearshore Topography and Bather Risk

This document describes a study into the influence of alongshore bathymetric variability on currents which form a risk to bathers. Changes to coastal zone management along the Delfland Coast have given rise to questions on the influence of alongshore bathymetric variability on bather risk. Extensive measurement data is available from two...

The design of multi-value sand nourishments

Relative sea level rise and climate change, but also the migration of the growing world population to the coast, continuously increase the pressure on the coastal system. In combination with the increased awareness for sustainability, the interests in the coastal zone become integrated and complex. Integrated Coastal ZoneManagement (ICZM)...

Effectiveness of the Sand Engine: An objective evaluation with the Frame of Reference approach

This study has as main objective to `make recommendations for improvement of the objective evaluation of the effectiveness of the Sand Engine'. The Frame of Reference methodology, a tool developed by Van Koningsveld (2003), is used to map the evaluation of effectiveness. This approach is used descriptively as well as prescriptively. A...

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...

Sustainable long term coastal protection and development based on sand nourishments

The study presents an assessment of sustainable practices for applying sand nourishments aiming long term coastal protection and development. Such concepts are applied in three study cases: Sylt (Germany), S'Abanell (Spain) and Ghanaian coast.

An intrinsic sediment tracing method using natural quartz- and feldspar luminescence

The goal of a sediment tracer is to give quantitative or relative feedback on (coastal) morphological changes or track either sediment or other particles (e.g. contaminations) in sediment dynamic environments. A sediment tracer is a visible or invisible marked (sediment) grain that is artificially injected or is present in-situ. This Master...

Convex coastline induced rip currents at the Sand Engine

This study investigates the hydrodynamics at a convex coastline. The Sand Engine, a man made peninsula in the Netherlands, is used as a case scenario. It is hypothesized that a rip current can develop under certain wave conditions due to the change in coastline orientation. The main goal of this research is to obtain a better understanding of...

Process-based Modeling of Coastal Dune Development

This thesis presents the application of an aeolian transport model used in desert environments [Sauermann et al., 2001, Kroy et al., 2002] as a tool for the evolution of coastal nourishments. This study will try to investigate the driving processes in the model and adapt or extend the model application to the coastal system. If we want to apply...

Pilot Sand Groynes Delfland Coast: Efficiency and practical feasibility of a pulse nourishment

In September and October of the year 2009, three sandgroyne nourishments have been executed at the Delfland Coast near the village of Ter Heijde. The nourishments have been executed to restore the sediment buffer in the upper part of the coastal profile. A sandgroyne is a concentrated amount of sediment (200.000m3) artificially nourished from...