Probabilistic modelling of extreme beach erosion using XBeach

Master thesis (2011)

Contributors

M.J.F. Stive (mentor)
F. Baart (mentor)
C. Den Heijer (mentor)
D. Callaghan (mentor)
Department
Hydraulic Engineering (CEG) (TU Delft)
Copyright: © 2011 Riesenkamp, M.J.
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Published Date

08-11-2011

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Faculty

Civil Engineering and Geosciences

Department

Hydraulic Engineering

Abstract

The long series (>30 year) of measurement data of erosion events at Narrabeen beach (NWS, Australia) provides insight in erosion volumes and their return periods in this area. The aim of this study was to replicate these data using XBeach in order to assess the validity of both the Joint Probability Model (JPM) and XBeach on beaches such as Narrabeen. In this study, a large number of different storms were simulated using XBeach. The probability and thus return period of the resulting erosion volumes were determined using the JPM. XBeach was calibrated against two individual erosion events, one at Narrabeen beach and one at Hasaki beach (Japan). The best fit for the Narrabeen beach, obtained using a stationary mode, led to an overestimation of erosion volumes at lower return periods (< 3 year) but fell within the boundaries implied by a 95% confidence interval of the measurement data for higher return periods. When calibrated against the erosion volumes with low return periods (

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