Simulating sea-level rise impacts on shoreline change along a wave-dominated embayed beach with the LX-Shore model
Abstract
Predicting future shoreline changes is crucial for coastal stakeholders to mitigate the safety and economic risks inherent to the urbanization of coastal areas undergoing erosion. Reduced-complexity processed-based shoreline change models are relevant tools to simulate the shoreline variability from days to timescales greater than decades, providing insight into shoreline behavior in response to changes in the forcing conditions (e.g. waves, sediment inputs, sea level change). Among these models, LX-Shore model introduced by Robinet (2017, in revision) is able to simulate shoreline changes along wave-dominated sandy coasts controlled by the combination of gradients in total longshore sediment transport and cross-shore transport driven by the variability in incident wave energy. LX-Shore can handle complex shoreline geometries (e.g. sand spits, islands), including non-erodible areas such as coastal defenses and headlands, and is coupled with the spectral wave model SWAN to cope with complex nearshore wave fields. Numerical developments have been recently implemented in LX-Shore to simulate the impacts of sea-level change on shoreline dynamics, in particular the so-called Bruun effect. These developments are presented and the ability of the LX-Shore to reproduce shoreline changes driven by sea-level rise is illustrated in several applications of the model to an idealized embayed beach exposed to different forcing settings.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFMOS51E1295L
- Keywords:
-
- 1225 Global change from geodesy;
- GEODESY AND GRAVITYDE: 1641 Sea level change;
- GLOBAL CHANGEDE: 4217 Coastal processes;
- OCEANOGRAPHY: GENERALDE: 4556 Sea level: variations and mean;
- OCEANOGRAPHY: PHYSICAL