This work provides a comprehensive and theoretical approach to the use of laser scanning for watercourses analysis. It integrates data from four laser different scanning sources: Airborne Laser Scanner, LiDAR Bathymetry, Terrestrial Laser Scanner, and Unmanned laser scanning with focus on geomorphology dynamics, supported by numerous examples and practical applications, as follows: co-registration, georeferencing, derivation of digital surface and terrain models, vegetation analysis, hydrological applications such as delineating river courses, modeling drainage systems, calculating flow direction, and bathymetric data processing with refraction phenomenon correction for accurate depth measurements. The research highlights both the advantages and limitations of laser scanning technology in riverine environments. Dedicated to both students and professionals in the field, overall, this work provides valuable insights into the application of laser scanning technology for studying and exploring riverine environments. It contributes to the growing body of knowledge in this field, paving the way for more sophisticated and accurate analysis of these dynamic and complex environments.