The Egmond Model - Calibration, validation and evaluation of Delft3D-MOR with field measurements

The Egmond Model - Calibration, validation and evaluation of Delft3D-MOR with field measurements

Elias, E.P.L.

Walstra, D.J.R. (mentor)
Roelvink, J.A. (mentor)
Reniers, A.J.H.M. (mentor)
Stive, M.J.F. (mentor)

Civil Engineering and Geosciences

Hydraulic Engineering

1999-03-01

Coastal management and engineering rely increasingly on predictions made by computational numerical models of hydrodynamic and morphodynamic processes. However due to the lack of real data from coastal field measurements the models used, are rarely tested. With the COAST3D measuring campaign at a site near the town of Egmond a data set is available with detailed measurements, not only a dense spatial coverage of the modelled area is obtained, but also detailed measurements of boundary conditions, like the wind field and deep water wave height are made. Delft3D-MOR was used to construct a model for the Egmond site. This EGMOND model is validated and calibrated using the data base available from the pilot measuring campaign (data available from April 30 to May 6 1998). Comparison of the model results with measured data show that the model is capable of reproducing the measurements. The validation runs have been carried out using standard parameter settings. These settings enable the hindcasting of measured data but also enables the model to be used for making predictions of future situations. In general the model results give a good approximation of the measurements. For deeper water, where waves have little influence, the results are very good. For the surf-zone, where the details of wave transformations have large influence, the results show less agreement with the measurements. With modifications in the Delft3D-WAVE program and wave schematisations these results could be improved. In the current version of Delft3D-WAVE the Battjes-Janssen theory to take wave breaking into account is applied, including the roller formulation (the roller is defined as a turbulent bore-like mass of water representing a forward momentum flux, which can be seen as an additional sink term in the Battjes-Janssen formulation) could improve the results in the surf zone.

Egmond
Delft3D-MOR
hydrodynamics

http://resolver.tudelft.nl/uuid:4764c864-12ba-4759-ae13-ee1c3170dfff

Student theses

master thesis

(c) 1999 Elias, E.P.L.