Print Email Facebook Twitter Hydrodynamics and Morphodynamics in the Egmond field site: Data analysis and UNIBEST-TC modelling Title Hydrodynamics and Morphodynamics in the Egmond field site: Data analysis and UNIBEST-TC modelling Author Kleinhout, K. Contributor Stive, M.J.F. (mentor) Van Rijn, L.C. (mentor) Walstra, D.J.R. (mentor) Klopman, G. (mentor) Elias, E.P.L. (mentor) Corporate name WL Delft Hydraulics Faculty Civil Engineering and Geosciences Date 2000-09-01 Abstract With the COAST3D measuring campaign at a site near the town of Egmond a valuable data set is available with detailed measurements. This data set is useful for analysis of hydrodynamic and morphodynamic processes present in the Egmond (double breaker bar) system. Extensive calibration and validation of numerical models as not only a dense spatial coverage of the modelled area is available, but also detailed measurements of boundary conditions, such as the wind field and deep water wave height. Analysis of the relative wave height in the breaker region, shows a marked influence of the deep-water wave steepness on the maximum value of the relative wave height. Initially, the Battjes&Stive (1985) relationship for wave breaker parameter was applied by the UNIBEST-TC profile model. Based on the trend of the variation of the maximum relative wave height as a function of the deep-water wave steepness, found in the data analysis, the wave breaking simulation could be improved. In general, the model results give a good approximation of longshore currents. Comparison of the cross-shore velocities of the model and measurements is more difficult. Longshore current instabilities are measured in the Egmond field site during the campaign. The relative small cross-shore velocities are influenced significantly by this meandering nearshore velocity. An averaged profile is used, representing the entire area of interest. In general, the modelled movement of the bars is in reasonable correspondence with the measurements. However, significant differences in the measured and computed movement of the bars can be observed. During high wave conditions the offshore movement is over-estimated. During low wave conditions the model is capable in computing an onshore movement of the breaker bars. However, a simulation of the entire period results in an over-estimation of the offshore movement of the breaker bar. Subject coastal stabilitycoastal morphology To reference this document use: http://resolver.tudelft.nl/uuid:37d23ac5-56d8-43dc-8d47-67e292097810 Publisher TU Delft, Civil Engineering and Geosciences, Hydraulic Engineering Part of collection Student theses Document type master thesis Rights (c) 2000 Kleinhout, K. Files PDF ceg_kleinhout_2000.pdf 47.89 MB Close viewer /islandora/object/uuid:37d23ac5-56d8-43dc-8d47-67e292097810/datastream/OBJ/view