Annelies Bolle

Annelies Bolle
International Marine and Dredging Consultants (IMDC nv), Antwerp, Belgium · Coasts & Estuaries

Ir. Civil Engineering, KU Leuven; M Sc. Coastal environmental Engineering, University of Southampton

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31
Publications
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382
Citations

Publications

Publications (31)
Article
Coastal environmental degradation – or the reduction of the capacity of coastal environments to meet social and ecological objectives and needs – is both a driver and a consequence of climate-induced disasters. In the West African coastal areas of Côte d’Ivoire, Ghana, Togo and Benin the major drivers of environmental degradation are found to be pr...
Book
Full-text available
This is a reprint of articles from the Special Issue published online in the open access journal Energies (ISSN 1996-1073) from 2018 to 2019 (available at: https://www.mdpi.com/journal/energies/special issues/marine).
Article
Full-text available
This study aims to improve the design of scour protection around offshore wind turbine monopiles, as well as future-proofing them against the impacts of climate change. A series of large-scale experiments have been performed in the context of the European HYDRALAB-PLUS PROTEUS (Protection of offshore wind turbine monopiles against scouring) project...
Article
Free access on this link until April 25, 2018 https://authors.elsevier.com/a/1WgCn1M2DU~hr3 Coastal zones are under increasing risk as coastal hazards increase due to climate change and the consequences of these also increase due to on-going economic development. To effectively deal with this increased risk requires the development of validated t...
Article
Early Warning Systems (EWS) are nowadays becoming fairly standard in river flood forecasting or in large scale hydro-meteorological predictions. For complex coastal morphodynamic problems or in the vicinity of complex coastal structures, such as harbours, EWS are much less used because they are both technically and computationally still very challe...
Data
• Storm impact data from ten sites across Europe is combined in a user-friendly web viewer • Data transparency and international standards promoted through use of Version Control System, INSPIRE metadata and OpenEarth repository • Database combines historical and modern event information of physical forcing conditions and their socio-economic impac...
Conference Paper
Full-text available
Low-frequency high-impact storms can cause flood and erosion over large coastal areas, which in turn can lead to a significant risk to coastal occupation, producing devastation and immobilising cities and even countries. It is therefore paramount to evaluate risk along the coast at a regional scale through the identification of storm impact hotspot...
Conference Paper
Full-text available
This paper presents the application of several empirical formulas for horizontal wave force calculations due to broken and/or overtopping waves for a series of beach profiles in North West France and illustrates the results of wave run-up, horizontal forces (Fh) and the limitations of the technique. The choice of the formulas from the literature re...
Article
Groynes were constructed west of the Volta river mouth sand spit in Ghana to mitigate the local average beach retreat of 6 m/year. Even though severe swell events occurred during the construction of the first couple of groynes, the sand spit retreat of about 150 m over less than 1 year was surprising. An in-depth analysis was done by performing a h...
Article
Along the northwest African coast average rates of coastal retreat are between 1 and 2 m per year. In Ada, Ghana, the shoreline retreat rates have been in excess of 6 m per year at some specific locations. As a result of the ongoing erosion, various properties and existing infrastructure are being damaged and destroyed; also, due to the poor condit...
Conference Paper
Full-text available
Scour protection is a requirement of many offshore projects for foundations, pipelines and cables. Standard methods adopt a static protection where the top layer of armour is designed to resist hydraulic loading (den Boon et al., 2004; de Vos et al., 2011). The size of rock required to provide stability under storm waves and currents close to a str...
Article
Full-text available
A couple of years ago, the Ghanaian government decided to protect the coast in Ada. In total a stretch of about 16 km had to be defended with a combination of groynes and a beach nourishment. The project was split into two phases: first the groynes in the most critical stretch were built (and finished summer 2013), next the remaining groynes and th...
Article
Armour layer scour protections around offshore wind turbine foundations are commonly designed to provide a static protection in storm conditions, which means no or limited movement of rock is allowed (Den Boon et al., 2004, De Vos et al., 2011). This approach often results in large stone sizes and high scour protection costs. Therefore, a dynamic a...
Article
Full-text available
Extreme coastal storms have a destructive impact on coastal areas and directly affect people living in the coastal zone, being this emphasized by recent events (e.g. Katrina, Xynthia) which reminded the world of the vulnerability of coastal areas. The economic constraints and the increasing vulnerability of coastal areas (due to sea level rise and...
Conference Paper
Full-text available
Hydrodynamic boundary conditions are needed for the design of new sea defence structures in the harbour of Oostende along all quays to defend the city centre and hinterland from flooding during a super storm. The wave climate in the harbour was decoupled to wave penetration and locally generated wind waves to allow separate modelling of both phenom...
Article
In this paper a storm threshold for significant morphological change along the Belgian coastline is presented. Using a dataset covering topography, bathymetry and hydrodynamic conditions for the period 1983–2007, the main erosive years on the one hand, and the most severe storm events on the other hand have been selected. The topographic data were...
Article
Full-text available
The coastal town Ada in Ghana is threaded by a severe coastal erosion. A protection scheme has to be designed to protect the town. Since the area is ecologically important, e.a. due to the presence of turtles, both during the design process and during the construction phase actions to diminish possible negative effects have to be considered. The de...
Article
Full-text available
The coastal town Ostend in Belgium has his sea wall far in the sea. For this reason, the protection of the town against storms is difficult. A harbor is situated in the city, with the harbor entrance close to the most important sea wall. Integration of harbor constructions and coastal protections schemes is necessary.
Article
Full-text available
The XBeach model has been applied for different field sites, each having its specific problems. Cases were ranging from typical 1D beach erosion tests during storm conditions (to compare with Durosta results) which were extended to full 2D models to include the effects of curved coasts. For these kind of applications the XBeach model proved to be a...
Conference Paper
In the first phase of C-Power's offshore wind farm project, six gravity based foundations (GBFs) have been installed 30km offshore of the Belgian Coast, on the Thornton bank in the North Sea. To guarantee the stability of the GBFs, a static scour protection system is designed. One of the challenges during construction is to define a realistic metho...
Article
This study fits into a wider research program from RWS RIKZ concerning the exchange of sediment between the coast and the tidal basins, Western Scheldt and Wadden Sea, which are the largest basins along the Dutch Coast, over different time-scales. For both basins, questions about the evolution of the import/export at the mouth recently arose. In ca...
Conference Paper
Full-text available
In this paper we present the first results of beach profile hindcasting with XBeach using recently measured coastal data acquired under storm conditions at eight European sites, including a comparison to model results obtained with off-the-shelf models. The results show consistently that the XBeach has skill in predicting the coastal profile, albei...

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Projects

Projects (4)
Project
Developing methods, tools and approaches to reduce coastal risks. Risckit.eu