Field Evidence of a Nature-Inspired Solution to Mitigate the Impacts of Hard Coastal Structures

Abstract

This study evaluated the integration of artificial mangrove roots (AMRs) as a nature-inspired soft solution to counteract the adverse end effects of hard coastal infrastructure. Using unmanned aerial vehicle–LiDAR surveys and multitemporal shoreline analysis, we assessed AMR performance at 2 pilot sites: Nang Thong Beach along the Andaman Sea and Sam Roi Yot Beach on the Gulf of Thailand. Results indicate that AMRs enhance shoreline stability, dissipate wave energy, and promote sediment retention. At Sam Roi Yot Beach, AMR-protected areas experience substantially less shoreline retreat (≤3 m) than adjacent unprotected zones (7 to 10 m). At Nang Thong Beach, the system promotes beach stability but sustains damage from floating large wood debris under storm conditions, suggesting the need for structural enhancements in highenergy environments. Compared to conventional structures, AMRs offer clear advantages: high porosity for wave energy dissipation, modular design for rapid deployment, and compatibility with ecological and regulatory frameworks. Importantly, AMRs can be deployed alongside existing hard structures to mitigate their unintended impacts, such as end erosion and scouring. Beyond physical performance, the AMR system represents governance and social innovation. Successful implementation involved coordination with national agencies, provincial authorities, and local communities. Its nature-mimicking design promotes public acceptance and stewardship, reinforcing the socio-ecological sustainability of the intervention. These findings highlight AMRs as a viable, scalable solution for climate-resilient shoreline management and support their integration into ecosystem-based and nature-based strategies within coastal zones vulnerable to climate-induced change.