The effect of storms on fine sediment dynamics in the Dutch Coastal Zone

The North Sea is a heavily used area, with wind parks, shipping routes, fishing, sand mining, and many future constructions planned. The Dutch Coastal Zone, the area of the North Sea containing the Dutch coast, is home to several natural areas, alongside extensive human-built flood defenses. Maintaining balance between these areas requires that...

On the anatomy of nearshore sandbars: A systematic exposition of inter-annual sandbar dynamics

Nearshore sandbars have a lifetime of many years, during which they exhibit cyclic, offshore directed behaviour with strong alongshore coherence. A bar is generated near the shoreline and grows in height and width while migrating offshore, before finally decaying at the seaward limit of the surf zone. It may take 10 to 15 years for a bar to...

On the Intersite Variability in Inter-Annual Nearshore Sandbar Cycles

Inter-annual bar dynamics may vary considerably across sites with very similar environmental settings. In particular, the variability of the bar cycle return period (Tr) may differ by a factor of 3 to 4. To date, data studies are only partially successful in explaining differences in Tr, establishing at best weak correlations to local...

Tide-induced currents in a phase-resolving wave model

Alongshore currents are currents parallel to the coastline. In coastal areas they are driven by a combination of wave and tidal forcing. In this study, the validity of the non-hydrostatic, wave-flow model SWASH to predict these currents is investigated. This is done by comparing model predictions with measurement observations. Observations were...

Rip current predictions through model-data assimilation on two distinct beaches

This paper describes the development of a physics-based rip current prediction system called CoSMoS. This system consists of a hydrodynamic prediction system which is composed of a train of surge and wave models from the global scale to the scale of a beach resort (order kilometers). For the beach resort scale model, it is of utmost importance...

Drainage Tubes versus Sediment

The study starts with possible working mechanisms of the tubes within the complex beach system. In addition, huge amounts of data are collected which tells us more about the sedimentology of the beach and soil structure. This data is used later on to study influenced beach processes and morphological change. For this study both the beach near...

Rip Current Characteristics at the Dutch Coast: Egmond aan Zee

Rip currents are narrow, seaward directed flows in the surf zone that can pose a serious threat to swimmers. This issue has received attention particularly on swell dominated coasts (such as the US, Australia, France and UK) where numerous field experiments have been undertaken. However, the threat of rip currents is less recognised on wind-sea...

Edge scour around an offshore wind turbine

Wind energy has experienced an enormous growth in the last years and is becoming more and more popular as an alternative for conventional power. Large growth numbers are also expected for the coming years, for onshore as well as for offshore wind energy. Currently, a wind power capacity of almost 4 GW is installed offshore in the European Union,...

Dynamiek van het strand bij Noordwijk aan Zee en Egmond aan Zee en het effect van suppleties

DEZE ENTRY BEVAT ZOWEL DE ORIGINELE RAPPORTAGE (T0-RAPPORT, 2006) ALS HET VERVOLG DAAROP (T1-RAPPORT, 2007). In deze studie beschrijven en analyseren we maandelijks hoogtemetingen uitgevoerd op twee intergetijdestranden langs de Hollandse kust. Naast de wetenschappelijk vragen bij het seizoensgebonden gedrag van het intergetijdestrand richten we...

Evaluatie onderwatersuppleties Egmond en Bergen

Het kustvak bij Egmond wordt, evenals dat bij Bergen, frequent gesuppleerd om de positie van de vastgestelde basiskustlijn (BKL) te handhaven. Deze BKL is ter plekke, vanwege de specifieke situatie aldaar, verder zeewaarts gekozen dan in aangrenzende vakken. Bij Egmond moet zo bijvoorbeeld gewaarborgd worden dat de strandboulevard in tact blijft...

The Egmond Model - Calibration, validation and evaluation of Delft3D-MOR with field measurements

Coastal management and engineering rely increasingly on predictions made by computational numerical models of hydrodynamic and morphodynamic processes. However due to the lack of real data from coastal field measurements the models used, are rarely tested. With the COAST3D measuring campaign at a site near the town of Egmond a data set is...

Het effect van brandingsruggen op de kust van Egmond aan Zee

In dit onderzoek wordt een gedeelte van de Hollandse kust beschouwd, namelijk het kustvak nabij Egmond aan Zee. In dit kustvak doet zich een vreemd verschijnsel voor; wanneer de mate van kustvooruitgang en kustachteruitgang langs de kust wordt uitgezet blijkt een golfachtig patroon op te treden met een kenmerkende golflengte van 2 km. Verder...