This book examines engineering and mathematical models for documenting and approving mechanical and environmental discharges‎.‎ The author emphasizes engineering design considerations as well as applications to waste water and atmospheric discharges‎.‎ Chapters discuss‎:‎ * the fundamentals of turbulent jet mixing‎,‎ dilution concepts‎,‎ and mixing zone concepts * diffuser configurations and head loss calculations * different modeling techniques and accepted models ‎- discussed in detail with theoretical background‎,‎ restrictions‎,‎ input‎,‎ output‎,‎ and examples * Lagrangian and the EPA UM 2‎-dimensional diffuser model * the PLUMES interface * Eulerian integral methods‎,‎ EPA UDKHG 3‎-dimensional diffuser model‎,‎ and PDSG surface discharge model * empirical techniques‎,‎ RSB diffuser model‎,‎ the CORMIX family of models for both diffusers and surface discharge * numerical methods with a discussion of shelf commercial models * Gaussian atmospheric plume models Fundamentals of Environmental Discharge Model‎.‎‎.‎‎.‎