Gorinchem, Netherlands
Gorinchem, Netherlands

Van Oord is a Dutch contracting company that specializes in dredging and land reclamation. Van Oord has undertaken many projects throughout the world, including land reclamation, dredging and beach nourishment. Wikipedia.

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Verpoorten S.P.K.,LievenseCSO | Ockeloen W.J.,Van Oord ACZ | Verhagen H.J.,Technical University of Delft
Coastal Structures and Solutions to Coastal Disasters 2015: Resilient Coastal Communities - Proceedings of the Coastal Structures and Solutions to Coastal Disasters Joint Conference 2015 | Year: 2015

Since 1977 dedicated studies are made to the stability of rubble mound break-water toes under wave attack. A large number of stability methods is available, but prediction accuracy is low and validity ranges are too small for use in practice. In this research the decoupled model approach is used to evaluate prediction capacity of existing toe stability methods. The approach uses numerical model IH-2VOF for a prediction of stability. Review of the model showed that it is highly sensitive to stone properties and that turbulence was not modelled. Under the assumption that the latter is not of major importance, calibration of motion formulae against physical measurements and evaluation of the stability methods was performed. The decoupled model approach appeared to give good stability predictions. Validity limits of the stability methods seemed to be too strict. A ranking of stability methods was made. Future validation should confirm the results before incorporation in design manuals. © 2017 American Society of Civil Engineers.

Fiselier J.,RoyalHaskoningDHV | Vreman B.-J.,RoyalHaskoningDHV | Dekker S.,Van Oord ACZ | Thorborg H.,Boskalis
Proceedings of the Institution of Civil Engineers: Maritime Engineering | Year: 2015

Dredging projects use large amounts of fuel, which leads to substantial carbon dioxide (CO2) emissions. Until now, reducing the carbon footprint of dredging projects has mainly involved investigating the possibilities of dredging schemes and vessels that are more fuel efficient. A reduction in the order of 10-20% may be within reach, most of it is a win-win situation since fuel reduction will also reduce costs. A further reduction in carbon dioxide emissions may be possible on a project-by-project basis but will involve a trade-off between dredging costs and carbon dioxide emissions. Marine engineering projects also have an impact on primary production and formation of organic carbon and on sedimentation processes and burial of organic carbon in sediments. Both impacts influence carbon sequestration and can be a substantial or even overriding factor in the ‘carbon footprint’ of a project. The carbon footprint of a marine engineering project is often larger and more complex than previously anticipated. However, a more comprehensive carbon footprint also shows that a significant reduction in carbon dioxide emissions is possible when the designs and dredging and maintenance schemes stimulate sequestration of organic carbon in the wider environment. © 2015, ICE Publishing. All rights reserved.

Baart F.,Technical University of Delft | Baart F.,Deltares | Van Gelder P.H.A.J.M.,Technical University of Delft | De Ronde J.,Technical University of Delft | And 4 more authors.
Journal of Coastal Research | Year: 2012

Sea-level rise rates have become important drivers for policy makers dealing with the long-term protection of coastal populations. Scenario studies suggest that an acceleration in sea-level rise is imminent. The anticipated acceleration is hard to detect because of spatial and temporal variability, which consequently, have become important research topics. A known decadal-scale variation is the 18.6-year nodal cycle. Here, we show how failing to account for the nodal cycle resulted in an overestimation of Dutch sea-level rise. The nodal cycle is present across the globe with a varying phase and a median amplitude of 2.2 cm. Accounting for the nodal cycle increases the probability of detecting acceleration in the rate of sea-level rise. In an analysis of the Dutch coast, however, still no significant acceleration was found. The nodal cycle causes sea level to drop or to rise at an increased rate; therefore, accounting for it is crucial to accurately estimate regional sea-level rise. © 2012, the Coastal Education & Research Foundation (CERF).

de Vriend H.,Technical University of Delft | van Koningsveld M.,Van Oord ACZ | Aarninkhof S.,Hydronamic
Proceedings of the Institution of Civil Engineers: Civil Engineering | Year: 2014

The Netherlands has adopted a new, proactive approach to developing its extensive coastal and river works called 'building with nature'. Rather than simply minimising or mitigating the environmental impact of harbours, navigation channels, land reclamation and flood defences, the idea is to make use of the dynamics of the natural environment and provide opportunities for natural processes. Existing concepts and ideas have been further developed and tested in a number of full-scale pilot experiments, including sand engines, oyster reefs and wave-attenuating forests. This paper describes a number of these experiments along with the preliminary results and lessons learned.

Baart F.,Technical University of Delft | Baart F.,Deltares | Van Koningsveld M.,Technical University of Delft | Van Koningsveld M.,Van Oord ACZ | Stive M.J.F.,Technical University of Delft
Journal of Coastal Research | Year: 2012

Discussions on sea-level rise trend estimates as, for example, the one recently published in this Journal of Coastal Research, reveal different perspectives on proper methods of deriving sea-level trend estimates. This editorial discusses various methodological considerations and proposes a number of best practices for sea-level trend analysis. © 2012, the Coastal Education & Research Foundation (CERF).

Den Heijer C.K.,Technical University of Delft | Den Heijer C.K.,Deltares | Baart F.,Technical University of Delft | Baart F.,Deltares | And 2 more authors.
Geomorphology | Year: 2012

This paper describes an investigation into the added value of a fully probabilistic approach to dune resilience assessment over the currently applied deterministic and semi-probabilistic approaches. The method is applied to the Dutch coast but is generically applicable, provided of course the sufficient availability of data. The DUROS+ model in its most basic form was used to quantitatively assess dune resilience. The Monte Carlo method was used for the probabilistic investigation. Important research questions were (1) where can the DUROS+ model in combination with the fully probabilistic approach be applied along the Dutch coast? and (2) what is the alongshore variability of failure probability using this probabilistic approach?The main conclusion of the work presented in this paper is that the fully probabilistic approach provides valuable added insight with respect to the actual failure probability of transects. At the same time it is noted that the current dune erosion model in its most basic form is not able to cover all of the Dutch coast. Reasons lie in the availability of sufficient quality boundary conditions, applicability limits associated with model assumptions and insufficient quality coastal profile information. To extend the coverage of the analysis of failure probabilities along the Dutch coast it is recommended (1) to involve more process-based model concepts that can cope with the situations DUROS+ cannot, and (2) to expand currently available data on boundary conditions. © 2011 Elsevier B.V.

Suzuki T.,Technical University of Delft | Zijlema M.,Technical University of Delft | Burger B.,Van Oord ACZ | Meijer M.C.,Delta Marine Consultants | Narayan S.,University of Southampton
Coastal Engineering | Year: 2012

The energy of waves propagating through vegetation is dissipated due to the work done by the waves on the vegetation. Dalrymple et al. (1984) estimated wave dissipation by integrating the force on a cylinder over its vertical extent. This was extended by Mendez and Losada (2004) to include varying depths and the effects of wave damping due to vegetation and wave breaking for narrow-banded random waves. This paper describes the wave dissipation over a vegetation field by the implementation of the Mendez and Losada formulation in a full spectrum model SWAN, with an extension to include a vertical layer schematization for the vegetation. The present model is validated with the original equation and results from Mendez and Losada (2004). The sensitivity of the model to the shape of the frequency spectrum, directional spreading and layer schematization are investigated. The model is then applied to field measurements by using a vegetation factor. This model has the ability to calculate two-dimensional wave dissipation over a vegetation field including some important aspects such as breaking and diffraction as used in SWAN model. © 2011 Elsevier B.V.

Smid M.,Technical University of Delft | Dekker S.,Van Oord ACZ | Wiegmans B.,Technical University of Delft
Transportation Research Part A: Policy and Practice | Year: 2016

Cost characteristics of differently sized inland waterway terminals (IWTs) have not received much scientific attention. This observation is remarkable given the importance of costs in transportation decision-making. Classification of differently sized IWTs and their cost structure will lead to more insight into the container cost per terminal. Therefore, the goal of our research was to determine both the characteristics of the cost structure associated with different inland waterway (IWW) container terminal types and the sensitivity of the system to cost/TEU changes in input and operational conditions. We show that terminals with a higher container throughput encounter fewer costs, and can therefore charge a lower price. Assumed delays of 2. h per day on the waterside cause a 4.7-6.6% cost increase per container, mainly caused by extra labor costs. It is also assumed that the changing climate will influence terminal operations and results in extreme water levels (lasting two weeks occurring four times a year) causing a cost increase of 1.0-3.4%. Subsidies can cause cost reductions of 0.3-10.4% depending on the exact form, with the smaller terminals benefiting more because their investment costs are higher relative to operational costs. A subsidy can lower costs by up to 10.4%, but it is questionable whether small and medium terminals will have a lower cost price than the market price, showing that it is important for small and medium terminals to quickly grow in size. © 2016 Elsevier Ltd.

de Nijs M.A.J.,Technical University of Delft | de Nijs M.A.J.,Van Oord ACZ | Pietrzak J.D.,Technical University of Delft
Ocean Modelling | Year: 2012

We explore the dynamics of the salt wedge and estuarine turbidity maxima (ETMs) in the Rotterdam Waterway using three-dimensional model simulations. These are compared to 13-h time series of profiles of velocity, salinity and suspended particulate matter (SPM) at a number of boat stations along the estuary, and long-term water level and salinity records. Evaluation of the numerical results shows that while good agreement is found between predicted and measured water levels and tidal discharges, the model under-predicts saltwater intrusion and stratification, and it over-predicts the height of the pycnocline above the bed. This leads to deficiencies in predictions of (1) the magnitude and vertical distribution of the baroclinic pressure gradient and subsequently of local shear and (2) vertical SPM gradients and concentrations near the bed because salinity stratification determines this distribution. However, the stability of the salt wedge during tidal excursions, the dominant role played by currents caused by the baroclinic pressure gradient and the damping of turbulence at the pycnocline with subsequent trapping of fluvial SPM at the head of the salt wedge are all well reproduced. A single stable ETM is formed when the salt wedge remains in the Rotterdam Waterway at low water slack. When saltwater intrudes farther up-estuary, multiple stable along-channel ETMs are maintained by localized trapping of fluvial SPM at the respective heads of saltwater by salinity gradients. Our results demonstrate that (1) the saltwater intrusion length is one of the main parameters controlling the SPM trapping probability and (2) the ETM is an advective phenomenon determining the timing of the availability of SPM for exchange with harbours. The model results indicate that all sediments deposited in the harbours along the Rotterdam Waterway and New Meuse are of fluvial origin. © 2012 Elsevier Ltd.

Van Oord ACZ and CeTeau Thailand Ltd | Date: 2014-03-19

Embodiments of the present invention provide drain roll packages (100) which are capable of supplying a continuous drain band (130) for soil consolidation operation based on the prefabricated vertical drain technology. In one embodiment, a drain roll package (100) includes a drain band (130) and a reel (110) around which the drain band is wound to form a plurality of windings (131,132). The drain band (130) has a core (137) and a shield (139) surrounding the core (137). At least one of the windings (131,132) is progressively shifted along a first axial direction (102) of the reel (110) such that a tail end (131b) of said at least one of the windings is offset from a head end (131a) of said at least one of the windings (131,132) along the first axial direction (102). Drain roll packages (100) formed according the present invention can supply a much longer drain band (130) without increasing the external diameter of the drain roll package (100).

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