Searched for: subject%3A%22Dredging%22
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Jaarsma, Ruurd (author)
Echosounders are used to monitor suspended sediment concentrations (SSC) in coastal management studies and to monitor dredge plumes. Due to the dependency on sediment properties like particle size, shape and density, performance of single frequency measurements is limited when sediment properties are changing.<br/><br/>Using multi-frequency...
master thesis 2023
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Stefanus Wicaksana Kurniawan, Stefanus (author)
The feasibility of installing a suction system, which consists of a pump and pipeline for transporting sediment from the sediment trap to the reallocation site to complement the water injection dredging (WID) method is accessed in this thesis. The combination of a suction system and a water injection dredger is called central suction-WID system....
master thesis 2022
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Nieuwboer, B.J. (author)
Due to an increased demand for transport, ships become larger, needing a larger navigable depth. For these reasons a waterway needs to be dredged and a Cutter Suction Dredger is a vessel suitable for this operation.<br/><br/>A Cutter Suction Dredger is a floating vessel which removes sand, clay or soft rock from sea or river beds. It has a...
doctoral thesis 2022
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Seegers, Daan (author)
This thesis combines a high-tech, capital product, with servitization methods in order to create a product-service system. Servitization has allowed companies to align their interests and create a co-creation environment. The overall objective of this thesis was to find an improvement over the current service design of Beaver vessels. This new...
master thesis 2022
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Bakker, Mathijs (author)
Due to the expected increase in coastal replenishment along the Dutch coastline, and the need to decrease pollutant emissions in the Netherlands and worldwide, the Autonomous Low Energy Replenishment Dredger (ALERD) is developed. The ALERD is a sustainable and cost-effective solution to perform coastal replenishment work along the Dutch...
master thesis 2022
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Ma, Sebastiaan (author)
The Port of Rotterdam experiences large amounts of siltation from the upstream rivers in its basins and canals every year. Furthermore, container vessels increase in size every decade and therefore require a larger navigational depth. These two factors cause the yearly amount of dredged material to increase. Currently, mainly trailing suction...
master thesis 2022
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Vromen, Tom (author)
There is a demand by Rijkswaterstaat for CO2-neutral sustainable methods and technologies to maintain the Dutch coastline. The Zandwindmolen is a fixed CO2-neutral dredge, transport and nourishment concept that nourishes sediment continuously. The purpose of using a Zandwindmolen is to provide the entire surrounding area where the Zandwindmolen...
master thesis 2022
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Aouragh, Bilal (author)
After decades of exploitation of hydrocarbons, the offshore facilities constructed for this purpose are nearing the end of their design life and/or economic operation. According to international law, these offshore structures need to be completely removed. Decommissioning of the substructures often requires for soil to be removed in piles to...
master thesis 2022
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Kirichek, Alex (author), Cronin, Katherine (author), de Wit, Lynyrd (author), Meshkati, Ebi (author), Pennekamp, Johan (author), Wijdeveld, Arjan J. (author), Sloff, C.J. (author)
Water Injection Dredging (WID) has been successfully applied for removing sediment deposits in reservoirs, which results in an increase of their storage capacity. This dredging method is based on the fluidization of the top sediment layer by pressurized injection of water by a dredging vessel. The fluidized sediment can be transported towards...
conference paper 2022
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Buffon, P. (author), Uijttewaal, W.S.J. (author), Franca, M.J. (author), Valero Huerta, Daniel (author)
conference paper 2022
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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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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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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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Nanninga, Stefanie (author)
The amount of suspended sediment spill released during dredging activities in the Fehmarnbelt strait is monitored along the excavated trench to prevent negative effects on local ecology. Stratification due to the interaction of saline water from the North Sea and fresh water from the Baltic Sea forces bi-directional flow of the layer above and...
student report 2021
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Kroonenberg, Nick (author)
The Autonomous Low Energy Replenishment Dredger (ALERD) strives to revolutionize the dredging world. The ALERD operates autonomously underwater, which saves energy during the dredging process and transit. Autonomous underwater operation drives the need of alternative energy facilities. However, due to the energy savings of dredging, alternative...
master thesis 2021
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ten Brummelhuis, Erwin (author)
Siltation of fine (cohesive) sediment in navigation channels and harbour basins may cause serious problems for the shipping industry. Intensive maintenance dredging is required to ensure safe shipping traffic. Conventional dredging methods are highly expensive, and therefore port authorities seek for more efficient solutions to reduce costs. One...
master thesis 2021
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Kleermaker, Wim (author)
The constant impingement of sand particles on the wetted surfaces of a centrifugal dredge pump causes the performance of the pump to deteriorate. Therefore, components or complete pumps have to be replaced after some time. The use of numerical models to estimate the erosion wear in centrifugal dredge pumps can give insight into the principal...
master thesis 2021
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Deuss, Bram (author)
Sediment management is necessary to keep the Waal navigable. Sediment management in the Waal is carried out by both dredging and plowing of the river bed. By analysing historic data available at Rijkswaterstaat, the relation between the hydrograph and the amount of required dredging and plowing is investigated. Also the influence of the...
master thesis 2021
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van Ingen, Floris (author), Geleijnse, Jan (author), Curzi, Fabio (author), Kingma, Pieter (author)
On request of Royal Boskalis Westminster N.V. a comprehensive research was performed regarding emission free maintenance dredging in a harbour environment. The project site is the Maasmond at the port of Rotterdam. It covers an area of almost 10 km2 and, on average, a monthly volume of 400.000 cubic meters of sediment needs to be dredged. The...
student report 2021
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in 't Veld, Maarten (author)
One classic challenge in pump operation is the occurrence of cavitation. Cavitation is the forming of vapour bubbles in a fluid due to a local drop in pressure, followed by a subsequent implosion of those bubbles due to an increase in pressure. The vapour formed can significantly decrease pump efficiency and the implosion can be detrimental to...
master thesis 2021
Searched for: subject%3A%22Dredging%22
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