This book is specially designed in line with the requirements for the cultivation of talents in water conservancy and related disciplines in vocational colleges, under the guidance of hte work process, and by integrating the concurrent standards and advanced technologies of marine construction monitoring, reinforcement, emergency flood fighting. It contains a preface and six learning programs: monitoring and maintenance of rock and earthfill dams, monitoring and maintenance of concrete and masonry dams, maintenance and repair of sluice, maintenance and repair of floodways, maintenance and repair of channels and canal structures and dam emergency flood fighting.