Numerical modelling of bow thrusters at open quay structures

Introduction Bow thrusters are of great help for the navigation at quay walls, but the high and turbulent velocities can result in a bed load exceeding the strength of the bed or bed protection. To be able to design a stable bed the velocities at the bed need to be accurately determined. In design practise the velocities generated by a propeller...

Developing a parametric model for storms to determine the extreme surge level at the Dutch coast

To date no study has been done to analyse the effect on water level for the Dutch coast from the passage of storms over the North Sea. This research examines the feasibility of developing a joint probability method to determine the extreme water level for the Dutch coast, resulting from these storms. This has been done by means of a parametric...

Beheersen van extreme waterstanden in het IJsselmeer, een nieuw perspectief voor een veilig en klimaatbestendig IJsselmeergebied

In 2008 kwam de tweede Deltacommissie met het voorstel om het waterpeil van het IJsselmeer in de toekomst met 1,5 m te verhogen. Door de verwachte zeespiegelstijging zal het namelijk steeds moeilijker worden om het overtollige water van het IJsselmeer af te voeren naar zee. Om dit onder vrij verval te kunnen blijven doen is een peilopzet...

Spectral simulation of non-breaking wave forces up to the second order on immobile vertical walls

Induced by a rapid increase of ship sizes in the last decades, the demand for deeper waterways emerged and so did the demand for higher breakwaters. The scale of land reclamation projects has also increased concomitantly. This means they extend such projects now further offshore into deeper water, requiring higher watersheds. In this deeper...

Evaluation of an alternative way of river bank protection in the Meghna Estuary

After the disastrous floods in Bangladesh in 1987 the Flood Action Plan (FAP) was initiated. The FAP was a co-ordinated action to study the flood problems of Bangladesh. The Meghna Estuary Study (MES) was drawn up as a component of the FAP. The overall goal of MES is to ensure the physical safety and social security of the people living in the...

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...

Stability of outfalls during installation

Outfalls are built for the purpose ofdischarging sewage, storm runoff or cooling water into the sea. During the installation, outfalls are exposed to relatively large hydrodynamic forces compared to their own weight in case of adverse weather or high currents. To resist these forces, a heavy concrete weight coating has to be applied. With...

The Ulsan port development plan

The subject of investigation in this study is the extension of Ulsan Port in the south east of the Korean peninsula. The existing port of Ulsan is mainly an industrial port, with refineries, petro-chemical industries, car manufacturing and ship building. The Korean government is setting up an overall port development strategy, in which Ulsan...

Verification of the numerical wave model SWAN in the Petten coastal area

Due to the new act on the water defense the Directorate-General of Public Works and Water Management of the Netherlands is required to evaluate the design conditions for the coastal defenses every five years. To do this evaluation a model is needed to translate offshore wave conditions to nearshore design conditions. For such transformations...

Coastal Coal Transport Study Talcher-Kayamkulam, India

Background The demand for electricity in India is particularly acute in the southwestern region. Consequently, to meet this demand the Government of India has initiated plans to build a thermal power plant near the coastal city of Kayamkulam. Ultimately, in the year 2005, this plant is to be capable of producing 1,936 mega-Watts of electricity....

Het nummeriek berekenen van de getij-beweging in een bekken met sluitgat met behulp van een computer

Het afsluiten van een getijgebied geeft bij het voortschrijden der bouw problemen van vloeistofmechanische aard. De opening in de afsluitdam, waardoor het getij kan toetreden wordt steeds kleiner. Als gevolg daarvan blijft het getij het af te sluiten gebied meer en meer achter op het buitengetij. Hierdoor nemen de snelheden en daarmee de...