Introduction

More than 70% of the world’s sandy coastlines have been undergone net erosion over the past decades. In macro-tidal coastal settings such as the Belgian coast, beaches are commonly characterized by multiple intertidal bars which play an important role in protecting the subaerial beach from storm erosion by reducing wave energy at the coast. These features could be well-developed, stretching over 5 km alongshore. There is little information on their large-scale characteristics and on their short- and long-term morphological behavior and evolution. Morphodynamics of such bar systems are primarily controlled by external forcings such as the water level and the incident wave energy. Hence accurate survey and mapping of the multiple intertidal bar areas are essential to understand their morphodynamics over a range of spatio-temporal scales.

The RS4MoDy aims to investigate the morphodynamics of macro-tidal barred beach from short (storm event) to long-term (>25-years), and to address the relative roles of meteorological‐marine forcing factors in driving bar behaviour and evolution. This project will provide a better understanding of barred beach morphodynamics and will have some implications for coastal management.

Expected results

-  Thematic maps of the bar morphodynamics and sediment budget for pre and post-storm using UAV

-  Thematic maps of the bar morphology, changes and sediment budget at annual scales using LiDAR data

- Development of a method to extract automatically bar based on digital elevation model  with morphometric and volumetric indicators

-  Modelling bar morphodynamics

 

Period

November 2017- October 2020

Disciplines

Coastal morphology, Remote sensing, Local Spatial Analysis, Modelling