Welcome to the RAS Solution Forums HEC-RAS Help 1D vs. 2D Modeling – Bridge Hydraulics

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    Jack Fraser
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    Hello! We are working on a model of a creek that runs underneath a bridge. Normally we work with 1D models – and they typically show a bump in the HGL due to bridge contraction and expansion losses. We tested a 2D model for this project, and now it is not showing any bump in the HGL. Would anybody know what is happening here without seeing the project file? Are 1D bridge models typically more conservative than 2D models?

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