Computational Hydraulics introduces the concept of modeling and the contribution of numerical methods and numerical analysis to modeling. It provides a concise and comprehensive description of the basic hydraulic principles, and the problems addressed by these principles in the aquatic environment. Flow equations, analytical and numerical solutions are included. The necessary steps for building and applying numerical methods in hydraulics comprise the core of the book and this is followed by two different example applications of computational hydraulics: river systems and water quality modelling of lakes and rivers. The theory and exercises included in the book promote learning of concepts within academic environments. Computational Hydraulics is intended for under-graduate and graduate students, researchers, members of governmental and non-governmental agencies and professionals involved in management of the water related problems.