Augusseau P. E. auteur aut IRD Proisy Christophe auteur aut IRD Gardel A. auteur aut IRD Brunier G. auteur aut IRD Granjon Laurent auteur aut IRD Maury T. auteur aut IRD Mury Antoine auteur aut IRD Staquet Adrien auteur aut IRD Santos V. F. auteur aut IRD Walcker R. auteur aut IRD Degenne P. auteur aut IRD Lo Seen D. auteur aut IRD Anthony E. J. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Highly dynamic wave-exposed muddy coasts harbouring mangrove ecosystems can be subject to both marked accretion and erosion depending on the complex interactions between mud and waves. We propose a multiscale modelling approach and empirical equations calibrated and integrated into a landscape dynamics model implemented on a mud-bank coast using the Ocelet language to simplify the complex processes driving sea- mangrove coastline dynamics and quantity them with 10 years of satellite observations of mangrove shoreline fluctuations. We find that fluctuations in seafront mangroves can be simulated with acceptable accuracy along 200 km of coastline. In the absence of mud banks, seasonal wave forcing resulted in erosion rates reaching 1100 m/y. Our findings indicate that wave energy can be reduced by 90% at all locations when the width of mud banks exceeds 2000 m in front of the mangroves. Finally, we discuss the potential of this modeling approach for anticipating coastal changes. specialized Landscape evolution model Open coast Wave attenuation Remote sensing Amazon sediments French Guiana GUYANE FRANCAISE 021 122 020 186 106345 [14 ] 2025 1364-8152 https://www.documentation.ird.fr/hor/fdi:010092753 10.1016/j.envsoft.2025.106345 1364-8152 [F B010092753] https://www.documentation.ird.fr/hor/fdi:010092753 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2025-03/010092753.pdf IRD - Base Horizon / Pleins textes 2025-03-12 2026-06-12 fdi:010092753 fre