This book comprises proceedings of the 28th International Conference on Hydraulics, Water Resources, River and Coastal Engineering (HYDRO 2023). It focuses on emerging opportunities and challenges in the field of coastal, harbor and ocean engineering. The book covers a range of topics including, but not limited to, coastal disasters including tsunamis, cyclones and storm surges, sea level rise, coastal structures and oceanography, wave-structure interaction. The book presents these topics in the form of illustrations and tables, thereby providing the readers with an in-depth insight into the recent research. It also addresses fundamental concepts and studies in the field of coastal, harbor and ocean engineering, making it a valuable resource for both researchers and professionals working in the fields of hydraulics, water resources and coastal engineering.