Coupling Mechanism of Ecological Resilience and Flood Control Engineering: A Four-Dimensional Framework for Coastal Park Disaster Reduction—A Case Study of the Dike Improvement Project of Dajiaoshan Coastal Park in Nansha

Aiming at the dual challenges of storm surge safety and landscape conservation in coastal parks, existing studies often separate ecological resilience from flood control engineering, lacking an integrated framework to coordinate the two, thus failing to provide effective technical support. This study proposes their coupling mechanism and constructs a four-dimensional framework centered on engineering, ecological, social and governance resilience. Adhering to the “adapting measures to local conditions and time” strategy, it integrates four technical systems to build a safe, adaptive and sustainable natural-artificial collaborative disaster prevention barrier. Taking Nansha Dajiaoshan Coastal Park’s flood control improvement as an empirical case, the model solves traditional pain points such as sea view obstruction and ecological damage, raising the flood control standard from less than 20-year to 200-year return period, and achieving multi-dimensional balance. It fills the research gap, provides a global reference, enriches coastal disaster risk management research, and promotes the integrated development of ecological resilience and engineering technology.