Two-dimensional HEC-RAS models and topo-bathymetric datasets for the Willamette River, Oregon

This dataset contains two-dimensional hydraulic models throughout the Willamette River, extending from the McKenzie River confluence, near Eugene, to the city of Newberg. The study reach is separated into five individual models to simplify tributary inflow boundary conditions and for run-time efficiency. These models were developed to assess juvenile salmonid habitat at streamflows ranging from typical low summer flows to roughly the median annual high flow along each reach. Steady-state streamflow conditions were simulated in an unsteady flow simulation by holding streamflow constant for longer periods of time. Underlying these models is a digital elevation model, which combines bathymetric lidar, collected in 2017, with boat-based sonar data. Details on model and bathymetry development, calibration, and results can be found in the accompanying Scientific Investigation Report, Development of Continuous Bathymetry and Two-Dimensional Hydraulic Models for the Willamette River, Oregon.