Morphodynamic upscaling with the MORFAC approach

Conference paper (2010)
Department
Hydraulic Engineering (CEG) (TU Delft)
Copyright: © 2010 The Author(s)
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Published Date

30-06-2010

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Source:

32nd International Conference on Coastal Engineering, ICCE 2010, June 30 – July 5 2010, Shanghai, China

Faculty

Civil Engineering and Geosciences

Department

Hydraulic Engineering

Abstract

The Morphological Acceleration Factor (MORFAC) approach for morphodynamic upscaling enables the simulation of long term coastal evolution. However the general validity of the MORFAC concept for coastal applications has not yet been comprehensively investigated. Furthermore, a robust and objective method for the a priori determination of the highest MORFAC that is suitable for a given simulation (i.e. critical MORFAC) does not currently exist. This paper presents some initial results of an ongoing, long-term study that attempts to rigorously and methodically investigate the limitations and strengths of the MORFAC approach. Based on the results of a numerical modelling exercise using the morphodynamic model Delft3D, the main dependencies and sensitivities of the MORFAC approach are investigated. Also, a criterion is proposed for the a priori determination of the critical MORFAC, based on the CFL condition for bed form migration.

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