The book is a collection of extended papers which have been selected for presentation during the SIMHYDRO 2014 conference held in Sophia Antipolis in June 2014. The book focuses on the modeling and simulation of fast hydraulic transients, on 3D modeling, and on uncertainties and multiphase flows. The book explores both the limits and performances of actual models and also presents the most recent developments based on new numerical schemes, high performance computing, multiphysics and multiscale, methods, and better interaction with field or scale models data. The book caters to practitioners, stakeholders, researchers and engineers in this field.