Searched for: subject:"dredging"
(1 - 20 of 82)

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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), More Authors (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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Goeree, J.C. (author)
Transporting large amounts of sand is mostly done hydraulically in dredging and mining. This method of sand transport is efficient and is used in land reclamation projects or extraction of oil from tar sands. Large pieces of equipment, such as pumps and pipe line systems, dredging vessels etc., are used enabling the sand water mixtures to be...
doctoral thesis 2018
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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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Bisschop, F. (author)
The safety level of a dike is expressed in terms of risk. Risk is defined as the product of the probability of inundation of a polder (after failure of a dike) and the expected damage (casualties, economic damage and damage to the infrastructure) caused by inundation. The rate of inundation determines the amount of casualties and depends heavily...
doctoral thesis 2018
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Miedema, S.A. (author)
Most concentration distribution models are based on the advection diffusion equation for two-dimensional (2D) channel flow. These models may or may not incorporate hindered settling based on the cross-sectional averaged spatial volumetric concentration. These models also use a diffusivity based on the turbulent momentum diffusivity, sometimes...
conference paper 2017
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Breusers, H.N.C. (author)
In het eerste deel van het verslag M 817 zijn de oriënterende proeven beschreven welke deel uitmaakten van een onderzoek naar de zuigbaarheid van zand, opgedragen door de Stuurcommissie Research Zuigtechniek. Uit dit onderzoek bleek onder andere dat de zuigmond zelf van weinig belang was voor het zuigproces 1maar dat vooral de toestroming van...
report 2016
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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
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De Wit, L. (author)
3D CFD simulations, lab experiments and field measurements are used to get more understanding of the turbulent near field overflow dredging plume mixing. The focus has been on the most often used dredging vessel: a trailing suction hopper dredger (TSHD). Near field overflow dredging plume mixing is important because it determines the far field...
doctoral thesis 2015
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Miedema, S.A. (author)
In dredging, trenching, (deep sea) mining, drilling, tunnel boring and many other applications, sand, clay or rock has to be excavated. The productions (and thus the dimensions) of the excavating equipment range from mm3/sec - cm3/sec to m3/sec. In oil drilling layers with a thickness of a magnitude of 0.2 mm are cut, while in dredging this can...
book 2015
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Miedema, S.A. (author)
conference paper 2015
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Miedema, S.A. (author)
conference paper 2015
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Miedam, S.A. (author)
conference paper 2015
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Miedema, S.A. (author)
conference paper 2015
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Miedema, S.A. (author)
This book gives an overview of cutting theories. It starts with a generic model, which is valid for all types of soil (sand, clay and rock) after which the specifics of dry sand, water saturated sand, clay, rock and hyperbaric rock are covered. For each soil type small blade angles and large blade angles, resulting in a wedge in front of the...
book 2013
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Stano, P.M. (author)
A Trailing Suction Hopper Dredger (TSHD) is a ship that excavates sediments from the sea bottom while sailing. In situ material is excavated with a special tool called the Drag-Head, then it is hydraulically transported through a pipe to the hopper where it is temporarily stored. After the dredging is completed the collected material is...
doctoral thesis 2013
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Talmon, A.M. (author)
conference paper 2013
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Vijverberg, T. (author), Reneerkens, M.J.J. (author), Winterwerp, J.C. (author), Scholl, O. (author), Haruna, Y. (author)
Due to economic growth, Lagos Harbour is expanding. Capital dredging is needed to allow larger vessels to call the port. As harbour siltation is already a problem, increase of maintenance dredging is a worry. In the past no data was available to understand the hydraulics and sediment transport to estimate maintenance dredging volumes. This paper...
conference paper 2012
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van Rhee, C. (author)
conference paper 2010
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