You are here

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


Subscribe to our Blogs


For more information, contact Hector Olmos.

  1. Model stability can be sensitive to the computation interval. Lowering the computation interval of your plan file may reduce your error and make the model more stable.
  2. If a drop structure is present in the model, the best way to represent it is as an inline structure.
  3. Lateral and inline structure stability factors can improve model stability. In order to improve model stability, try increasing your stability factor from 1.0. The stability increases as you approach 3.0, but
  4. ...

Subscribe to our Blogs