Modeling Note: Local Scour and Bridge Sediment Limitations
Federal Highway Guidance for Bridge Scour analysis includes three major components: regional bed level change, contraction scour, and local scour (i.e. pier and abutment effects). The movable bed sediment transport capabilities in HEC-RAS
ONLY account for one of those three processes: regional bed change. To compute contraction and local scour use the
Bridge Scour tool in the
Hydraulic Design editor.