output: modelling data

DELFT3D model output of the changing flow strength and direction: (a) during max flood tide, and (b) max ebb tide. Note the arrows are the depth-integrated velocity. The model is driven by historical time-series of river discharge from river gauging station USGS 14246900 (Beaver Army Terminal) and water-levels prescribed using the key astronomical components ~20 km offshore from the mouth of the estuary. These flow patterns illustrate the important balance between hydrodynamic forcing of tidal flood and river flow combined with the bar topography and bed roughness. These complex interactions result in the flow reversals during the rising flood being spatially distributed across the channel.

Model output at ebb and flood tide showing reversing flow during flood, and strongly downstream during ebb.