Sentinel-6: Potential for Ocean Swell Detection: Effect of onboard data compression on geophysical parameter retrieval, a data driven analysis

Understanding the role of ocean swell, monitoring and modelling it is critical for a diverse range of oceanographic research, coastal management initiatives and for better weather forecasting and climate modelling. <br/>Currently, swell measurements are obtained through in-situ measurements, wave models, and satellite measurements. So far, swell...

Determining drought-induced subsidence in urban areas: An in-practice analysis of drought impacts on subsidence in two Dutch soft-soil cities

Drought and subsidence are two out of several water-related urban climate adaptation challenges many cities in the Netherlands currently face. Drought is expected to increase in frequency and extent due to climate change. Therefore, drought is likely to further pressurize (subsiding) urban areas in the coming decades. Although the impact of...

Remote sensing of swell waves in the North Sea with Sentinel-1 Synthetic Aperture Radar

The North Sea is known for its marine activities, which need ocean data for safe operations. The ocean surface is described using the two-dimensional wave spectrum. This ocean wave spectrum can be estimated using wave buoys, wave models or remote sensing techniques. Wave buoys and numerical models are known to contain inaccuracies, which...

IPMC Actuator for Swimming Microrobots

Autonomous microrobots ‘swimming’ through bodily fluids promise a major breakthrough in the fields of medicine and surgery. Targeted drug delivery, ablations, stents, implants, and remote sensing applications are among the envisioned applications. One of the biggest challenges in the design of these devices is the propulsion actuator. Within...

Experimental research into the effect of freeboard on the stability of a crown wall on a rubble mound breakwater

A crown wall is a gravity based L- shaped concrete structure on top of a rubble mound breakwater. Functions of a crown wall are: reduction of wave overtopping, enable transport on the breakwater and placement of pipelines on top of the flat surface. Marine contractor Van Oord was awarded to extend a breakwater with a crown wall on top, located...

Predicting Wave-Induced Flooding on Low-Lying Tropical Islands Using a Bayesian Network

Low-lying tropical islands are highly vulnerable to the effects of sea-level rise and climate change. Most pressing is the threat posed to their fresh water supplies by wave-induced flooding. This thesis attempts to generalize previous site-specific studies of flooding on coral atolls and apply it in a framework that can be used for early...

Numerical assessment and validation of a swelling rock model

In this research project, an assessment and validation of a swelling rock model (Benz, 2012), which is applicable to anhydrite swelling rock, was carried out through the Soil Test Facility of PLAXIS2D Finite Element Software. The validation process was conducted through the simulation of different element tests including stress-controlled...

Dynamic behaviour of tunnel elements during the immersion process: A study to the influence of swell waves and wind waves on the immersion system

Immersion of tunnels is an often used technique in rivers and canals. The transport of tunnel elements can be done under offshore conditions, but immersing the elements under these conditions is not common practise. The tunnel elements of the Busan-Geoje Fixed Link in South Korea were immersed in such a situation. During this process, several...

Swell and wave-groups at Saldanha bay

Mooring problems are one of the most important issues in port construction and port operation when harbours are facing the open sea. Operational standards usually define that cargo handling for large vessels is possible when significant wave height is below some level, i.e., 0.5 [m]. However, several ports have reported mooring problems when the...

The analysis of prototype measurements concerning the behaviour of moored ships in long waves

In the past decades several numerical models were developed to predict the behaviour of moored ships in waves. They are referred to as Six Degrees of Freedom models. These models need quite detailed input data. For the planning phase of a port or an offshore facility, a need has grown for a model which estimates the ship's behaviour and possible...

Bengkulu Harbour Project

The Indonesian government is stimulating development of areas outside Java to increase the food production of the country and to decrease the population density on Java. Also the Bengkulu district on the west coast of Sumatra has to be developed. Important for development is a good infrastructure, and in an archipelago like Indonesia sea...