In riverine systems, bridges typically represent an obstruction to channel and floodplain flow. The obstruction to flow can be a source of substantial energy loss. In order to appropriately model the energy loss due to a bridge in HEC-RAS, there are some things you should know.
Bridge modeling in HEC-RAS has several components:
- Bounding cross sections
- Ineffective flow areas
- Bridge opening
This post provides the information necessary to model a simple bridge using HEC-RAS.
Bounding Cross Sections