Showing papers by "J.W. Van der Meer published in 2011"
12 Feb 2011
TL;DR: The Wave Run-up Simulator as mentioned in this paper is based on the experiences with the Wave Overtopping Simulator and it is possible to simulate wave tongues overtopping a dike crest in reality.
Abstract: The idea of the Wave Run-up Simulator is based on the experiences with the Wave Overtopping Simulator. It is possible to simulate wave tongues overtopping a dike crest in reality. It must also be possible to simulate waves in the run-up and run-down zone of the seaward slope. This is the zone after waves have broken and when they rush-up the slope. The present report describes the idea of the Wave Run-up Simulator, why it is useful to develop the machine, to perform research with it and to develop a prediction method for slope strength. In fact, a prediction method can already be developed from the cumulative overload method, which was developed on the basis of results with the Wave Overtopping Simulator. It also means that tests on the seaward slope will be done for validation purposes only. The second part of the report describes in detail what is known about the movement of waves in this run-up zone and what actually the Wave Run-up Simulator has to simulate
11 citations
11 Jan 2011
TL;DR: In this article, large scale model tests were performed to assess the hydraulic stability of interlocked pattern placed revetments and the experimental results show a significant increase in hydraulic stability due to interlocking compared to traditional revetment elements.
Abstract: Revetments protect the shorelines of coasts, estuaries and rivers against wind wave, ship wave, current and ice attack. The resistance of revetments essentially depends on the properties of the cover layer. The resistance of interlocked pattern placed revetments depends on the weight of the individual stones and the interlocking. Extensive large scale model tests were performed to assess the hydraulic stability of interlocked pattern placed revetments. The experimental results show a significant increase in hydraulic stability due to interlocking compared to traditional revetment elements.
5 citations
05 Sep 2011
TL;DR: In this paper, the authors evaluated the resistance of various grassed slopes against wave overtopping by means of the Wave Overtopping Simulator in situ for a couple of years in Viet Nam.
Abstract: The resistance of various grassed slopes against wave overtopping has been appraised by means of the Wave Overtopping Simulator in situ for a couple of years in Viet Nam. Destructive test results show that a dike slope covered with grass could suffer a certain overtopping discharge not smaller than 20 l/s per m. During testing it was difficult to predict when a slope starts to be damaged, however, damages tend to follow a more or less similar process of development. The concept of “erosional indices” and the method of “cumulative overload” (van der Meer et al., 2010) are applied to the simulator tests in Viet Nam. Critical velocities were then estimated for different kind of grassed slopes.
4 citations
15 Sep 2011
TL;DR: In this paper, the simulation was applied to test the resistance against wave overtopping of grass covered dike slopes in Viet Nam, and the simulation results showed that grass cover could withstand a certain over-topping rate that varies widely and in order of 10 l/s per m. Damages were likely to be initiated at transition of either geometry or materials, at eroded holes and around objects existing on the slope.
Abstract: The Simulator was applied to test the resistance against wave overtopping of grass covered dike slopes in Viet Nam. Observation and measurement during destructive tests were performed to investigate the development process of damage induced by overtopping flow. Damages were likely to be initiated at transition of either geometry or materials, at eroded holes and around objects existing on the slope. Grass cover could withstand a certain overtopping rate that varies widely and in order of 10 l/s per m.
1 citations
01 Jan 2011
TL;DR: In 2012 heeft het onderzoek geleidt [geleid] tot een Technisch Rapport Toetsen van Grasbekledingen op Dijken as mentioned in this paper.
Abstract: In de periode van 2007-2011 is in het kader van SBW Golfoverslag en Sterkte Grasbekledingen keihard gewerkt aan onderzoek naar het gedrag van grasbekledingen op dijken bij golfoverslag. In 2012 heeft het onderzoek geleidt [geleid] tot een Technisch Rapport Toetsen van Grasbekledingen op Dijken. Tussentijds zijn veel rapporten geschreven die in deze drie mappen zijn samengevoegd, om te dienen als naslagwerk. Het onderzoek is uitgevoerd door een projectgroep met vertegenwoordiging vanuit Deltares, Indram, Van der Meer Consulting en Alterra.