Modeling long term shoreline evolution and coastal erosion

Abstract : This research focuses on the long-term shoreline evolution modeling, in which a combined model comprising the shoreline change due to longshore drift in a cross-shore shoreline model is proposed to improve the predictive skills of the long-term shoreline response. The cross-shore shoreline model of cite{splinter2014} is re-implemented for a purpose of comprehensive comparison with the combined model. A simplified longshore shoreline model is developed on the basis of the one-line type approach. The analysis of this longshore model yields the equilibrium beach orientation in relation to the incident wave orientation. It also reveals that part of seasonal shoreline position variability is due to the longshore transport. Therefore, the presence of the longshore model in the combined model clearly improves the model skills. The shoreline evolution models are calibrated with data from different beach types, such as a straight open beach shoreline of Truc Vert, France and embayed beach shoreline of Narrabeen, Australia and Nha Trang, Vietnam.This thesis gives two valuable contributions. The first one is a simplified longshore model and the equilibrium beach orientation. The second one is a combined longshore cross-shore phenomenological model.
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Hai Yen Tran. Modeling long term shoreline evolution and coastal erosion. Continental interfaces, environment. Université Grenoble Alpes, 2018. English. ⟨NNT : 2018GREAU027⟩. ⟨tel-01946554⟩

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