In this paper, we present an overview of the SWAN+ADCIRC modeling system for coastal waves and circulation. We also describe FigureGen, a graphics program adapted to visualize hurricane waves and storm surge as computed by these models. The system was applied recently to forecast Hurricane Isaac (2012) as it made landfall in southern Louisiana. Model results are shown to be an accurate warning of the impacts of waves and circulation along the northern Gulf coastline, especially when communicated to emergency managers as geo-referenced images.
During the 2010 oil spill, emergency responders needed forecasts of where oil would go given different scenarios and weather conditions, not just information of current oil location. Forecasts had to account for this first-time situation of oil coming from a deep water source and thus, “the important processes that contribute to oil movement in deep water, on the continental shelf, and within the complex nearshore environment.” Forecasters used the coupled SWAN (Simulating Waves Nearshore) and ADCIRC (Advanced CIRCulation) models to simulate currents that accounted for tides, rivers, winds, and waves. They adjusted their models with data from Lagrangian particle tracking to simulate “short-term (less than 1 week) oil movement.”