1329 / 2024-09-23 09:46:29

Influence of Oyster Reefs on Estuarine Morphology

Oyster Reefs,Estuarine Morphology,Numerical simulation,Sediment transport

Oyster reefs have critical effect in modifying the morphology and sediment dynamics of local shoals. Positioned along shorelines, these reefs can act as natural breakwaters, influencing both hydrodynamics and sediment transport. This study examines how various configurations of oyster reefs — differing in length, width, and spatial distribution — affect estuarine morphology under different tidal conditions. Understanding these relationships is crucial for optimizing oyster reefs restoration practices and mitigating shoreline erosion, as oyster reefs not only protect vulnerable coastlines but also contribute to sediment stabilization and habitat formation.



Through numerical simulations in an idealized intertidal basin geometry, we explore the complex interactions between shallow water and sediment transport processes. The results suggest that the presence of reefs alters sediment distribution patterns, contributing to localized erosion and deposition both around the reefs and in adjacent offshore areas. These changes can significantly affect estuarine morphology, leading to long-term shifts in morphodynamics. The reefs serve as blocks and corridors for water flow during flood and ebb tides which, in turn, change the hydrodynamics and redistribute sediments. Furthermore, the study investigates the impact of upstream river inputs on local morphological evolution highlighting the placement of reefs in buffering these effects. Over time, estuarine morphology reaches an equilibrium, which varies based on the specific reef configurations. Our findings indicate that different reef structures can lead to distinct patterns of morphological evolution, emphasizing the importance of reef design in coastal management and habitat creation.