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This lecture covers the concepts of river hydraulics, bedload transport, and hydraulic construction platforms, focusing on the development of streams and the protection against floods. It discusses the erosion of river banks, the impact of floods on infrastructure, and the principles of solid transport forces. The lecture also delves into the analysis of river profiles, sediment load capacity, and the evolution of river flows over time. Various formulas and theories related to bedload transport are presented, emphasizing the complexity of predicting sediment movement in rivers. Laboratory and on-site measurements are discussed, highlighting the challenges of applying theoretical approaches to real-world scenarios.