RT journal article
T1 High-Resolution Interannual Evolution of the Dune Toe at a Mesotidal Barrier (Camposoto Beach, SW Spain)
A1 Montes, Cristina
A1 Benavente González, Javier
A1 Puig Fuentenebro, María
A1 Montes Pérez, Juan Bautista
A1 Talavera Madrigal, Lara
A1 Plomaritis, Theocharis
A2 Ciencias de la Tierra
A2 Física Aplicada
K1 barrier dynamics
K1 coastal retreat
K1 dune toe dynamics
AB Over recent years, processes related to marine storms, sediment shortages and human intervention have caused the global retreat of many coastal systems and the degradation of their dunes. In this context, changes in the dune toe are commonly used as a proxy to study the interannual shoreline evolution, and it is usually analyzed using orthophotography, while high temporal- and spatial-scale resolution studies of dune toe evolution are not frequent. In this work, a quasi-monthly study of dune toe data was carried out between 2008 and 2018. These data, taken from the RTK-DGPS and UAS systems, were subjected to shoreline analysis, and they showed an average regression rate of −2.30 m/year, a higher value than the one registered until 2008 (1 m/year). This suggests an acceleration in the erosion suffered within the system, which was revealed to be more intense in the northern sector of the study area. Dune toe variability increased over the years, probably due to the presence of washover fans breaking the foredune that were reactivated and expanded during storm events. The ephemeral progradation of the dune toe was also noted, which could be explained with reference to wind events and/or beach nourishment that had been carried out over the studied period. From the analysis of the dune toe elevation, a decrease in this variable was obtained, especially in the areas affected due to washover fans. This finding is supported by the significant correlation of the dune toe elevation and erosion trend, suggesting that the areas where the dune toe was lower are prone to suffering a greater retreat. This correlation provides insight into the future evolution of the barrier, suggesting a state of degradation and a transition to a lower-resilience state.
PB Multidisciplinary Digital Publishing Institute
SN 2077-1312
YR 2024
FD 2024
LK http://hdl.handle.net/10498/33738
UL http://hdl.handle.net/10498/33738
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 10-nov-2026