Draw 2D Mesh Faces

The Draw 2D Mesh Face command allows the user to draw a mesh patch (or mesh template) and direct the software to honor the drawn patch when generating the mesh.

2D Floodplain Encroachments

The 2D Floodplain Encroachment command automates the placement and analysis of floodplain encroachments along the river reach when performing a 2D steady or unsteady flow computation.

Adaptive 2D Mesh

In addition to HEC-RAS’ default rectangular (structured) 2D computational mesh, the software can create an adaptive 2D mesh to better represent more complicated 2D flow conditions and structures.

Particle Tracking Maps

Plot moving particles on the flood map to represent the flow field for both 1D river reaches and 2D flow areas.

2D Flow Training Structures

Incorporate 2D flow training structures for river and stream restoration projects. Define river structural measures to improve the flow of the river and maintain the channel within the floodway, preventing and reducing river channel migration during flood events.

2D Ineffective Flow Areas

Ineffective flow areas can be assigned to the 2D mesh using polylines or polygons. Alternatively, draw ineffective flow areas on the Map View.

2D Conveyance Obstructions

Conveyance obstructions can be assigned to the 2D mesh using polylines or polygons. Alternatively, draw conveyance obstructions on the Map View.

Auto Fix 2D Mesh Bad Elements

The Army Corps of Engineers HEC-RAS software generates 2D meshes that contain elements that are marked “bad” and require manually fixing by the user.

Remember 2D Mesh User Edits

As you modify the 2D mesh by inserting additional elements, moving elements, and performing other mesh element editing, the software remembers these edits.

Assign Land Cover Data

Assign land cover polygons and/or National Land Cover Database (NLCD) data as Manning’s roughness to cross sections and 2D flow areas.

Google Earth Map Animation

Export flood map animations to Google Earth. This is helpful for presentations on flood risk assessment and flood management.

Animated Flood Maps

For unsteady flow models, the flood map can be animated to show how it changes with time.

Velocity Vector Maps

Plot velocity vectors on the flood map to represent the flow field for both 1D river reaches and 2D flow areas.

Flood Hazard Maps

Create 2D flood hazard maps, including:

• Flood Arrival Time
• Depth x Velocity
• Depth x Velocity²
• Flood Duration
• Flood Recession Time
• % Time Inundated
• Velocity

2D Bridge Analysis

Stamp bridge piers into the 2D mesh for the following pier shapes:

• Circular pier
• Rectangular round nosed pier
• Rectangular sharp nosed pier
• Rectangular square nosed pier
• Square pier