A GEMSS application requires two types of data: (1) spatial data (primarily the waterbody shoreline and bathymetry, but also locations, elevations, and configurations of man-made structures) and (2) temporal data (time-varying boundary condition data defining tidal elevation, inflow rate and temperature, inflow constituent concentration, outflow rate, and meteorological data. All deterministic models, including GEMSS, require uninterrupted time-varying boundary condition data. There can be no long gaps in the datasets and all required datasets must be available during the span of the proposed simulation period.
