MORPHODYNAMIC UPSCALING WITH THE MORFAC APPROACH

Proceedings of the International Conference on Coastal Engineering

Roshanka Ranasinghe⁴  Cilia Swinkels³  Dirkjan Walstra²  Judith Bosboom¹  Dano Roelvink⁵  Arjen Luijendijk²  Marcel Stive¹ 

[1] Technical Univ. of Delft;Deltares/Technical Univ. of Delft;Deltares;UNESCO-IHE/Technical Univ. of Delft;UNESCO-IHE/Deltares

关键词: Morphodynamic modelling;    MORFAC;    Delft3D;    long term coastal evolution;   

DOI  :  10.9753/icce.v32.sediment.59

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

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.A criterion (based on the CFL condition for bed form migration) for the a priori determination of the critical MORFAC is also proposed.

【 授权许可】

Unknown