Print Email Facebook Twitter Internal gravity waves in the Rhine ROFI Title Internal gravity waves in the Rhine ROFI: Applicability of the KdV model Author Platell, Hugo (TU Delft Civil Engineering & Geosciences; TU Delft Electrical Engineering, Mathematics and Computer Science) Contributor Pietrzak, J.D. (mentor) Schuttelaars, H.M. (mentor) Geyer, A. (mentor) Katsman, C.A. (mentor) Jones, Nicole (mentor) Lamb, Kevin (mentor) Rijnsburger, S. (mentor) Degree granting institution Delft University of Technology Date 2019-12-09 Abstract The Rhine Region of Fresh Water Influence (ROFI) is a shallow frictional river plume in front of the Dutch coast. Each tidal cycle a new tidal plume front with fresh-water is released. Recently, internal gravity waves have been observed in this plume. Using a Froude number analysis, support for the internal wave generation mechanism by a tidal plume front is found. It is shown, that on averaged neap tides the density stratification is large. This results in a larger area where the internal waves can be released from the tidal plume fronts compared to spring tides. As the Rhine ROFI is located in shallow water, it is investigated what the effect of bathymetry variation is on internal waves. This is studied by extending the standard KdV model derivation to account for a variable bed. This resulted in a small correction on the propagation speed inside the KdV equation. Observations of internal waves have been used to validate the KdV model. By scaling analysis of the observed waves it is obtained that the relative wave height and relative depth balance for most of the observed events. For these events the wave period and velocity amplitude of the KdV model are well matched with the measurements. This showed that the KdV model may be used for a first estimate of internal waves in the Rhine ROFI. By developing a TGE fitting procedure, it was possible to obtain the pycnocline depth and the direction of wave propagation with only limited data available. Therefore, the parameters have been varied and the error between the TGE solution and the velocity potential obtained from the velocity measurements has been minimized. Subject Rhine ROFIInternal wavesKorteweg-De vriesTaylor-GoldsteinRhine RiverDelft3D To reference this document use: http://resolver.tudelft.nl/uuid:48869c49-cf5e-426d-bf32-d7f16622491a Bibliographical note Double degree Master of Science in Applied Mathematics and Civil Engineering Part of collection Student theses Document type master thesis Rights © 2019 Hugo Platell Files PDF Internal_gravity_waves_in ... itory2.pdf 46.88 MB Close viewer /islandora/object/uuid:48869c49-cf5e-426d-bf32-d7f16622491a/datastream/OBJ/view