Users can model bridges directly inside of 2D flow areas. Bridges inside of 2D flow areas can handle the full range of flow regimes, from low flow to pressure flow, and combined pressure flow and flow going over top of the bridge deck or roadway. Users enter bridge data inside of 2D Flow Areas similarly to the modeling of bridges in a 1D model. There are two methods in 2D for simulating 2D bridges: (1) 1D Family of Rating Curves, and (2) 2D Pressure/Overtopping.