Proceedings of the 32nd International Conference


coastal morphology
beach profiles
inverse method
behaviour-oriented models

How to Cite

Karunarathna, H., Reeve, D. E., & Spivack, M. (2011). ON MODELLING BEACH PROFILE EVOLUTION. Coastal Engineering Proceedings, 1(32), sediment.45. https://doi.org/10.9753/icce.v32.sediment.45


Behaviour-oriented beach evolution models are normally applied in a prognostic fashion, with model parameters and boundary conditions estimated from previous experience, other forecasts or from historic measurements. Here, we use observations of beach profiles to solve a cross-shore beach profile evolution equation in an inverse manner to determine key model parameters, cross-shore sediment diffusion coefficient and a time-varying source function. The data used to demonstrate the method are from Christchurch Bay in Dorset, United Kingdom. It was found that there is a significant contribution from diffusive processes to the morphodynamic variability of the beach profiles and that the development and disappearance of cross-shore coastal features such as upper beach berms and inter- and sub-tidal bars are well captured by the time-varying source function in the governing equation.


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