This collection of 83 papers presents the current state-of-the-art and practice in marine environmental modeling. The primary focus is on application of models to bays, sounds, lagoons, estuaries, embayments, bights, and coastal seas. Additionally, application of models to problems in hydrodynamics, water quality, and sediment transport are covered. Models aimed at solving engineering and environmental impact assessment problems, and also at better understanding circulation and pollutant transport in these near shore waters are included. Model applications to address regulatory requirements for facility sighting and operations are also presented. The topics include: finite volume and adjoint methods; predicting impacts at sensitive sites; simulating thermal processes; hydrodynamic model formulation; sediment transport processes; models for environmental assessment; three-dimensional water quality simulations; waves and wave-induced currents; simulating shelf-scale processes; plume simulations; hydrodynamics and GIS; transport of organisms; modeling enclosed bays; development and operation of coastal forecast systems; innovative computational techniques; data assimilation and model skill; and morphodynamic modeling.