Dear Colleagues,

The seabed is a dynamic environment that is constantly changing due to various geological, biological, and physical processes. Studying the seabed is crucial to understanding these processes and their impact on marine ecosystems, as well as for identifying potential hazards and resources. In recent years, advances in mechanics and dynamics have enabled researchers to gain new insights into the seabed and its behavior.

One area of research has been the study of sediment transport and deposition, which is critical for understanding the formation of seabed features such as sand dunes, ripples, and megaripples. Sediment transport models based on mechanics principles such as the Exner equation and the Bagnold formula have been developed to simulate the transport of sediment by waves and currents, and to predict the deposition patterns. These models have been validated using field observations and laboratory experiments, and have led to a better understanding of the factors controlling sediment transport and deposition.

Another area of research has been the study of seabed geohazards, such as submarine landslides and gas hydrate destabilization. These hazards can pose a significant risk to offshore infrastructure and human safety, and understanding their mechanics and dynamics is crucial for risk assessment and mitigation. Seabed stability analysis using geotechnical models and numerical simulations has provided insights into the factors that contribute to geohazard initiation and propagation, and has enabled the development of early warning systems.

In addition, the study of the seabed has also led to the discovery of new resources and ecosystems. For example, the exploration of hydrothermal vents and cold seeps on the seabed has revealed unique ecosystems that thrive in extreme conditions, and has led to the discovery of new species and biotechnological applications. The mechanics and dynamics of fluid flow and heat transfer in these systems have been studied using numerical simulations and laboratory experiments, and have provided insights into the processes that sustain these ecosystems.

Overall, the application of mechanics and dynamics to the study of the seabed has led to a better understanding of the complex processes that shape the seabed and its ecosystems, and has enabled the development of new technologies and approaches for sustainable management and utilization of marine resources.

Prof. Xianfeng WANG

Section Editor