As water-related issues become ever more important due to a growing and migrating population, geopolitics, climate change, and changes in land use, courses on water engineering – and open channel hydraulics in particular – are only set to expand. This modern textbook includes discussions of up-to-date technology and engineering, as well as examples and exercises based on real-life problems to aid student understanding. The book provides a thorough exposition of both the theoretical treatment and contemporaneous software applications relevant to one- and two-dimensional unsteady state flow problems. In addition, there is a detailed presentation of hydraulic design procedures for open channels and water control structures. This book will be valuable for advanced undergraduate and graduate courses in civil, environmental, and agricultural engineering. It will also be used as a reference textbook for professionals in water resources engineering and management, and for practical applications of physics of open channel flows.