Advantages of foredune soft protection: the case of Pehuén Co Beach, Argentina

This dataset aims to demonstrate that the use of Big Bags is effective in mitigating erosion caused by low-height waves, which for many coastal areas can represent a practical and cost-effective means of containing recurrent wave conditions. For the study area analyzed in this paper, given that the most frequent wave heights are low (> 86%), they function as a mitigation method during calm states and regular tides. For this reason, the results of their implementation were beneficial for the study area by maintaining the dune toe line in a stable position during the study period, mitigating the rapid and significant retreat of previous years. However, during storm events and extraordinary water level rises, where the water column exceeds one meter in height at the dune toe, the bags are overtopped, and the upper parts of the foredune are exposed to erosion.

本数据集旨在验证，大袋（Big Bags）的应用可有效缓解低矮海浪引发的海岸侵蚀；对于多数沿海区域而言，该方案是应对频发海浪工况的实用且经济高效的手段。针对本文所分析的研究区域，由于86%以上的海浪均为低矮浪，大袋在海面平静及常规潮汐时段可发挥侵蚀防护作用。正因如此，研究周期内大袋的应用为该区域带来了积极效益：其维持了沙丘坡脚线的稳定位置，缓解了此前数年出现的快速且大幅的海岸后退现象。但在风暴事件及极端水位上涨期间，当沙丘坡脚处的水柱高度超过1米时，大袋会被海浪漫顶，前沙丘（foredune）的上部区域将暴露于侵蚀风险之中。