Quantifying the spatially varying nearshore wave characteristics and energy dissipation mechanisms is of utmost importance for several coastal management and engineering applications as well as for flood hazard assessment. This study presents the ArcGIS Wave Transformation toolbox (ArcWaT), a model-based GIS toolbox for estimating wave transformation from wave magnitude and direction model outputs. In order to assess the ArcWaT capabilities, a case study was developed using ADCIRC + SWAN model outputs from a highly-resolved numerical...