Simulating surface soil moisture on sandy beaches

A model that simulates surface moisture content on sandy beaches for aeolian transport applications is developed and integrated into the aeolian transport model AeoLiS. The moisture content of a thin surface layer (≈2 mm thickness) is computed as a function of wave runup, precipitation, evaporation, percolation, and capillary rise from the...

Detection of aeolian sand strips and their characteristics using terrestrial laser scanning: The dependency between aeolian sand strip development and the environmental conditions occurring at the Noordwijk beach

Sea level rise causes more difficulties for coastal maintenance. Although hard structures were built in the past to prevent for flooding, nature based solutions are preferred more recently. For the application of nature based solutions, a better understanding of the coastal processes is desired. Dry sand is transported towards the dunes by...

Unravelling the sediment transport mechanisms in an artificial lagoon: Multi-modal sand transport analysis at the hard flood defence of Maasvlakte 2

The port of Rotterdam was full and new mooring locations were required to host the largest ships in the world. And if there’s no space to expand on land, why not create land in the sea? That is exactly what The Netherlands did by creating Maasvlakte 2. The construction of Maasvlakte 2 started in 2008 and was officially completed on May 22nd ,...

Field measurements on spatial variations in aeolian sediment availability at the Sand Motor mega nourishment

Spatial variations in aeolian sediment transport were measured at the Sand Motor mega nourishment in The Netherlands during a six week field campaign in the fall of 2014. A consistent significant increase in sediment transport in downwind direction (positive gradient) was measured over the intertidal beach area, indicating that the intertidal...

Modelling aeolian sediment accumulations on a beach

This paper aims to conceptually simulate observed spatial and temporal variability in aeolian sediment transport rates, erosion and deposition on a beach. Traditional strategies of modeling aeolian sediment transport rates do not account for supply limitations that are common on natural beaches. A recently developed 1D linear advection model is...

Monitoring of beach surface properties with remote sensing

Existing aeolian transport formulae tend to overestimate the sediment transport volumes in coastal environments. Supply limiting factors like moisture content, shell patches, sediment sorting, vegetation and morphological features are believed to explain these overestimations. These supply limitations act on a variety of spatio-temporal scales...

A new conceptual model for aeolian transport rates on beaches

In this paper a new conceptual model for aeolian sediment transport rates is presented. Traditional sediment transport formulations have known limitations when applied to coastal beach situations. A linear model for sediment transport rates with respect to wind speed is proposed and supported by both data and numerical model simulations. The...

Process-based modeling of coastal dune development

In this paper, the aeolian transport model DUNE (Sauermann et al., 2001, Kroy et al., 2002) that describes important features and dynamics of typical desert dunes, is extended such that it can be applied in sandy coastal areas. Initial tests explore the limitations of the model in coastal areas after which adaptations are proposed and...

Sediment exchange between the subaqueous and subaerial coastal zones

The coastal system consists of a sub-aqueous and a sub-aerial zone which can be separated by a border. At this border sediment exchange takes place from one zone to the other. This paper hypothesizes that conditions and therefore sediment exchange at this border are dependent on active profile characteristics. To analyze morphological...

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...

Sediment exchange between the subaqueous and subaerial coastal zones

The coastal system consists of a sub-aqueous and a sub-aerial zone which can be separated by a border. At this border sediment exchange takes place from one zone to the other. This paper hypothesizes that conditions and therefore sediment exchange at this border are dependent on active profile characteristics. To analyze morphological...

Aeolian transport on beach based on field measurement on the Dutch coast

During the winter 2009, beach and dune nourishments have been executed at Vlugtenburg (Holland coast) in order to reinforce the coastal defense. Natural processes such as wind and waves are expected to take care of effective and efficient redistribution of the sand throughout the system. The present study is part of the sub-project Monitoring...

Dune growth on natural and nourished beaches

Dune evolution on natural and nourished beaches on an engineering timescale is not well understood. Using a study of both literature, and data which has been gathered of the Dutch coast, a new hypothesis regarding the causes of variability in dune evolution is proposed. Following this hypothesis assumptions are made on the basis of which a...

Modellering zandtransport zeereep: Aanpassingslengtes, vegetatie en modelgevoeligheid

In dit rapport wordt ingegaan op drie deelonderzoeken die zijn uitgevoerd in het kader van het TAWC-project 'Fysische modellering zeereepontwikkeling'. Doel van dit project is de ontwikkeling van een model waarmee effecten van beheersmaatregelen op de morfologische ontwikkeling van de zeereep kunnen worden voorspeld, teneinde het zeereepbeheer...

Modellering zandtransport zeereep: Rekenprocedures SAFE 0.0

In dit rapport wordt ingegaan op de modellering van sedimenttransport door de wind op het strand en in de zeereep. Het doel is te komen tot een model waarmee effect en van beheersmaatregelen op de morfologie van de zeereep kunnen worden voorspeld, ten einde het zeereepbeheer te optimaliseren. Dit rapport beschrijft (a) versie 0.0 van het SAFE...

Sand movement by wind

Sand movement on the coast by wind action can be a major factor in some areas, yet very little is known about the basic mechanisms of movement by wind. With the growing use of artificial placement of sand material for beach restoration and protection, movement of sand by wind in the area shoreward of the waterline has become more and more a...