Modeling Flood Control Waterways McKee Applegate River Bridge in
Oregon Model area as meshed FLOW-3D results, water is colored by
velocity The installation of a new bridge over the Applegate
River in Oregon presented some very challenging modeling
circumstances for ASCG Inc., a FLOW-3D customer in Colorado.
With three drops and an irrigation diversion upstream of an
existing bridge (see photo, upper right), the project involved
some complicated flow patterns. To resolve the complex domain
and minimize the number of computational cells, ASCG made
extensive use of FLOW-3D's multi-block model (see figure at
center right). The three step dam diverts water into an
irrigation canal. At flood stage, some of that flow overtops the
ditch bank and spills onto the far piers. The combination of the
complex flow down the dam, water overtopping a large rock
outcrop, and the spill from the irrigation canal creates a
dangerous situation at flood stage. Simulations with FLOW-3D
yielded an average water surface profile in good