Print Email Facebook Twitter Design of the US Wave Overtopping Simulator Title Design of the US Wave Overtopping Simulator Author Van der Meer, J.W. Van der Meer, G. Corporate name TU Delft Date 2009-12-21 Abstract The US Wave Overtopping Simulator has to simulate overtopping discharges up to 2 cfs/s/ft for wave conditions of respectively 8 ft with a peak period of 14 s and 3 ft with a period of 6 s. This requires a Simulator which is in size about three times larger than the existing Dutch one. This report describes the theory of waves overtopping the crest of a levee, the design of the Simulator, how to operate it and possible ways to measure hydraulics during testing. We know a lot about wave overtopping over levees, but still there are discrepancies between various formulae. First the existing theory is given about wave overtopping discharge and individual wave overtopping volumes. This leads to the distributions of wave overtopping volumes that have to be simulated by the Simulator. Then flow velocities, flow depths and flow times or durations of overtopping wave volumes at the crest of a levee have been discussed, including re-analysis of existing work and some recent research. The conclusion is that using the equations in an integration, to calculate the wave overtopping volume, the volumes are much too large, indicating that at least flow depth andflow time predictions are too large. For this reason the Simulator will mainly be based on flow velocity and the given peak periods of the waves. Good experience is available with Simulators up to a size of about 6 m3/m width. The majority of all overtopping wave volumes will be limited to this size. It is for this reason that the US Simulator has been designed with an inner Simulator, comparable to the existing sizes, and an outer Simulator, giving the maximum capacity of 16 m3/m. The outer Simulator will only be used for the very large overtopping wave volumes. The mechanical design has been described and this design has been discussed during a visit to CSU, in order to start fabrication of the Simulator. The Dutch test set-ups at various locations have been described with their improvements every consecutive year. The operation of the Simulator by a steering file and PLC has been given, first by description of the Dutch Simulator and then by possible modifications and improvements for the US Simulator. Finally, experiences to measure flow depth and front velocity of overtopping waves have been described and possible ways of improvements, which will be performed in the Netherlands and tested in February/March 2010. If successful, these kind of measurements can also be developed at CSU. Subject overtopping simulator dikes grass Classification TLJ700500 To reference this document use: http://resolver.tudelft.nl/uuid:137570b8-7b61-42af-8540-a1b1240438f9 Publisher Van der Meer Consultancy Source report vdm09331 for Colorado State University Part of collection Hydraulic Engineering Reports Document type report Rights © 2009 Van der Meer Files PDF Report_Design_US_Simulato ... _v_1-0.pdf 1.97 MB Close viewer /islandora/object/uuid:137570b8-7b61-42af-8540-a1b1240438f9/datastream/OBJ/view