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de Hoog, E. (author), van der Voort, Tjalie (author), Talmon, A.M. (author), van Rhee, C. (author)Hydraulic transport pipelines in the dredging, mining and deep sea mining are designed using steady-state methods. However, these methods cannot predict density wave formation. Density waves form a risk for pipeline blockages, therefore there is a need to understand and preferably be able to model the process. The density waves studied in...journal article 2024
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't Hart, C.M.P. (author), Morales Napoles, O. (author), Jonkman, Sebastiaan N. (author)Immersed tunnels are positive buoyant structures during installation and negative buoyant after installation. A tunnel is composed of sequential immersed elements that are coupled to each other in joints. Tunnel elements consist of segments which are compressed to each other by longitudinal post-tensioning. After immersion the tunnel is...journal article 2024
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Wang, Bin (author), Zio, Enrico (author), Chen, X. (author), Zhu, Hanhua (author), Guo, Yunhua (author), Fan, Shidong (author)In the dredging industry, the automation and accuracy of the Dredging Perception System (DPS) are vital for operational efficiency and environmental safety. Current DPS implementations face challenges with sensor fault tolerance, leading to system unreliability and increased false alarm rates that can disrupt dredging operations. We propose a...journal article 2024
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Alhaddad, S.M.S. (author), Elerian, M.F.A.I. (author)Turbidity currents have extensively been explored in quiescent environments. However, during several underwater activities (e.g., dredging and deep sea mining), generated turbidity currents could travel in opposite directions and interact with each other, which could largely influence their hydrodynamics and sediment transport capacity....journal article 2024
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A new setup to study the influence of plant growth on the consolidation of dredged cohesive sedimentBarciela Rial, M. (author), Saaltink, Remon M. (author), van Kessel, Thijs (author), Chassagne, C. (author), Dekker, Stefan C. (author), de Boer, Hugo J. (author), Griffioen, Jasper (author), Wassen, Martin J. (author), Winterwerp, J.C. (author)Dredged cohesive sediment is progressively being used for wetland construction. However, little is known about the effect of plant growth during the self-weight consolidation of this sediment. In order to check the feasibility of such a study, a new experimental setup has been constructed. As an example, the effect of Phragmites australis on the...journal article 2023
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Nieuwboer, B.J. (author), van Rhee, C. (author), Keetels, G.H. (author)When dredging rock using a Cutter Suction Dredger the high amount of spillage is problematic, since it prevents an energy efficient removal process. This papers presents a coupled DEM-FVM method to simulate spillage, that can be used for optimizing the design and working method of the Cutter Suction Dredger. In these simulations, the challenge...journal article 2023
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Bakker, Mathijs (author), Coraddu, A. (author), Hijdra, Rolph (author)Autonomous submerged dredging offers numerous benefits, such as reduced ship resistance and lower vacuum requirements for the dredge pumps. However, this method also presents new challenges, such as stability and buoyancy control, which must be addressed to minimize the energy requirements and ensure cost-effectiveness and sustainability. To...journal article 2023
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Ali, W. (author), Enthoven, D.H.B. (author), Kirichek, Alex (author), Chassagne, C. (author), Helmons, R.L.J. (author)Flocculation between inorganic sediment, salt ions and microscopic organic<br/>matter present in the marine environment might play an important role in the<br/>dynamics of turbidity currents. The ability to predict, understand, and potentially<br/>leverage the effect of flocculation on turbidity currents will help to minimize the<br/>impact of...journal article 2022
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de Hoog, E. (author), van Wijk, J. M. (author), Talmon, A.M. (author), van Rhee, C. (author)Density wave amplification in hydraulic transport pipelines forms a high risk to operational continuity, as density waves can lead to system blockages or centrifugal pump drive failures. Recent experimental research, in pipelines which contain long vertical sections, has shown that density waves can amplify at velocities far exceeding the...journal article 2022
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Barciela Rial, M. (author), Vardon, P.J. (author), van Kessel, Thijs (author), Griffioen, Jasper (author), Winterwerp, J.C. (author)Progressively, more dredged sediments are being reused for engineering projects. For example, the Marker Wadden is a new wetland constructed in lake Markermeer, the Netherlands, with dredged cohesive sediments originating from the bed of the lake. Such dredged sediments are often dominated by cohesive sediment particles with varying amounts of...journal article 2022
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Wang, Boyao (author), van Rhee, C. (author), Nobel, Arno (author), Keetels, G.H. (author)In dredging, high pressure water jets are commonly applied to assist the mobilization of soil. This work considers the excavation of cohesive soil. The key objective is to predict the development of the cavity in the soil as a function of the undrained shear strength, translation velocity and hydrodynamic pressure of a single nozzle. A...journal article 2021
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Kirichek, Alex (author), Rutgers, Ronald (author)As regular maintenance and relocation of sediment deposits are highly expensive, Port authorities seek more efficient solutions for reducing the costs and CO2 emissions of maintenance dredging. One solution, water injection dredging (WID), is carried out for maintaining the sediment deposits which predominantly consist of clay and silt. WID has...journal article 2020
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Zander, F. (author), Heimovaara, T.J. (author), Gebert, J. (author)Purpose: The microbial turnover of sediment organic matter (OM) in ports and waterways impacts water quality, sonic depth finding and presumably also rheological properties as well as greenhouse gas emissions, especially if organic carbon is released as methane. As a consequence, sediment management practices as a whole are affected. This...journal article 2020
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Baptist, Martin J. (author), Gerkema, T. (author), van Prooijen, Bram (author), van Maren, D.S. (author), Colosimo, I. (author), Elschot, K. (author), de Groot, A. V. (author), Cleveringa, J. (author), van Eekelen, E. M.M. (author)We test an innovative approach to beneficially re-use dredged sediment to enhance salt marsh development. A Mud Motor is a dredged sediment disposal in the form of a semi-continuous source of mud in a shallow tidal channel allowing natural processes to disperse the sediment to nearby mudflats and salt marshes. We describe the various steps in...journal article 2019
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Dijkstra, Y.M. (author), Schuttelaars, H.M. (author), Schramkowski, G.P. (author)We investigate the hypothesis by Winterwerp and Wang (Ocean Dyn 63:1279–1292, 2013) that channel deepening in the Scheldt River Estuary could lead to a large increase in suspended sediment concentrations, with subsequent severe consequences to primary production and navigation. To this end, we use an idealised model to investigate the long...journal article 2019
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Oliveira, Bruna R F (author), Smit, Martijn P J (author), Veld, Harry (author), van Paassen, L.A. (author), Rijnaarts, Huub H M (author), Grotenhuis, Tim C. (author)Land subsidence in low-lying peatlands can be caused by shrinkage and organic matter oxidation. When these areas have networks of ditches and canals for drainage purposes, the sediments that accumulate in the waterways can be used to reverse the process of land subsidence. The objective of this study is to understand how dredged sediments can...journal article 2018
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van Vuren, S. (author), de Vriend, H.J. (author), Barneveld, Hermjan (author)Over the course of centuries, river systems have been heavily trained for the purpose of safe discharge of water, sediment and ice, and improves navigation. Traditionally, dikes are used to be reinforced and heightened to protect countries from ever higher flood levels. Other types of solutions than technical engineering solutions, such as...journal article 2016
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Radermacher, M. (author), De Wit, L. (author), Uijttewaal, W.S.J. (author), Winterwerp, J.C. (author)When dredging in sensitive environments, efforts have to be made to limit the free dispersal of suspended fine sediment from the dredging spill. Especially the use of hanging silt curtains as an environmental mitigation measure is widespread. Despite frequent application, their ability to reduce turbidity levels through vertical diversion of...journal article 2015
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Chen, X. (author), Miedema, S.A. (author), Van Rhee, C. (author)The increase of world population has been requiring more and more lands for human activities, which is why the world dredging market has been significantly growing up during the past 20 years. In dredging engineering, underwater excavation process is one of the major procedures which involves complicated physics, no matter it is sand, clay or...journal article 2015