This book presents research results, investigations and field experiences on contact-related behavior of hydraulic closures, such as gates of locks, weirs, movable flood barriers, shipyard and harbor docks. The subject is discussed in an interdisciplinary manner. Presented are design loads, tribological and other phenomena significant for the design and maintenance of gares and their contact components, as well as the impact of those phenomena on the type selection and design processes. The solutions and references originate from the author's experience in engineering, research and management...