2D Conveyance Obstructions Conveyance obstructions can be assigned to the 2D mesh to account for regions that are permanently blocked from conveying flow....
2D Flow Area Connection Issues A flow area connection can be used to model a hydraulic structure between two adjacent storage areas, a storage area...
2D Ineffective Flow Areas Ineffective flow areas can be assigned to the 2D mesh to account for regions where the water is not actively...
Adding a Base Map Layer A base map layer provides high-quality background aerial and other imagery from different online map providers to add context to...
Adding a GIS Shapefile to a Project This video details how to add a GIS shapefile to an engineering project model. Follow these steps to add a...
Adding an AutoCAD Drawing This video details how to add and georeference an AutoCAD (or MicroStation) drawing file for an engineering project. There are...
Adjust Elevations command The Adjust Elevations command is used to set or adjust elevations for a portion of an existing elevation grid. The user...
Assign Cross Sections command The Assign Cross Sections command is used to select an existing polyline on the Map View, assign it as a...
Assign Multiple Cross Sections command The Assign Multiple Cross Sections command enables the user to select a group of existing polylines on the Map View...
Assign River Reaches command The Assign River Reaches command enables the user to quickly assign a polyline as a river reach. Follow these steps...
Attribute Table command CivilGEO’s engineering software allows the user to easily review and edit GIS attribute data using the Attribute Table command. The...
AutoCAD Drawing as Terrain Elevation Data AutoCAD drawing files can be used as a terrain elevation data source in the following formats: Contour lines Elevation points...
Automated Draw Cross Sections command The Input | Cross Sections | Automated Draw Cross Sections command causes the software to automatically create cross sections along a river...
Bridge Design Location Considerations A poor bridge location makes it susceptible to damage and a host of other problems. Therefore, the location for a...
Common HEC‑RAS Workflows GeoHECRAS can perform the following HEC‑RAS workflows: Floodplain Analysis and Mapping Floodplain Encroachment Studies Roadway Crossing (Bridge & Culvert) Design...
Construct 3D Buildings from OSM Data Our software uses OpenStreetMap (OSM) data to create realistic looking 3D buildings on the Map View. The user can view...
Copying and Pasting Model Elements The software allows you to copy and paste model elements within a project and even between projects when two or...
Copying HEC‑RAS Entities from one Project to Another The software allows you to copy and paste model elements between projects. For example, select a cross section from one...
Creating Cross Sections from Terrain Elevation Data GeoHECRAS provides numerous methods for creating cross sections from terrain elevation data. The following commands are provided for creating cross...
Crop Base Map command The Crop Base Map command crops the base map (i.e., Google Map, Bing Map, etc.) to the elevation terrain data...
Defining HEC-RAS Storage Areas Upstream and downstream boundaries of a river reach can be connected to a reservoir, lake, or other types of large...
Digitizing Elements Digitizing (or drawing) elements on the Map View can be performed using the various HEC‑RAS specific commands (e.g., Draw River...
Draw Cross Sections command Cross sections are located at intervals along a stream for characterizing flow carrying capability of the stream and the adjacent...
Draw Cross Sections Command Shortcut (Ctrl+D Keypress) The Draw Cross Sections Command shortcut (Ctrl+D Keypress) allows the user to draw the cross sections directly on the Map...
Draw River Reaches command The Draw River Reaches command enables the user to draw a river reach on the Map View. From the Input...
Editing of River and Reach Names GeoHECRAS allows the user to rename a river and/or reach by double clicking on the reach name on the Map...
Export HEC‑RAS to Shapefiles command It is quite easy to export a HEC‑RAS model to GIS shapefiles, allowing the HEC‑RAS model data to be shared...
Exporting a HEC‑RAS Model to Google Earth It is quite easy to export a HEC‑RAS model to Google Earth, allowing the HEC‑RAS model data to be viewed...
External editing of HEC‑RAS models Often users will export a HEC‑RAS model from GeoHECRAS for project submission. During the process, changes might be made to...
Extract Cross Section Geometry command The Extract Cross Section Geometry command can extract the cross section geometry from an underlying elevation grid where there is...
Flow Roughness Change Factors command The Flow Roughness Change Factors command allows the user to adjust roughness coefficients with changes in flow. It enables the user...
Generate Contours command The Generate Contours command creates equally spaced contour lines from loaded elevation grid data. The user can specify major and...
Georeferencing a HEC‑RAS Model to a Map Location When importing a HEC‑RAS model, the imported model will be assigned to a local coordinate reference system. If the project...
Georeferencing a HEC‑RAS Model to a River Alignment This video tutorial shows you how to georeference a non-georeferenced HEC‑RAS model to a river alignment in real-world coordinates using...
HEC-RAS 2D Analysis Error – Weir Stationing Not Increasing When performing a 2D HEC-RAS analysis that contains storage areas and 2D connections, the HEC-RAS program might report the following...
HEC-RAS 2D Bridge Modeling When working with bridges with complex geometry, modeling the hydraulics in 2D provides a clearer understanding and a more accurate...
HEC-RAS Bridge Modeling HEC-RAS can be used to model roadway crossings, which can consist of single or multiple bridge openings and culverts. This...
HEC-RAS Bridge Modeling of Floating Debris Floating debris, such as tree limbs, logs, roots, brush, and other material, can get caught on the upstream side of...
HEC-RAS Flood Result Raster Grids While GeoHECRAS constructs a flood map representing the area of inundation, it can simultaneously generate an elevation raster grid (or...
HEC-RAS Ineffective Flow Areas Ineffective flow areas allow the user to define areas of the cross section that will contain water that are not actively being...
HEC-RAS Minor Loss Coefficients Minor losses represent sources of energy depletion along a river reach that are not related to friction loss. For example,...
HEC‑RAS Contraction & Expansion Losses Losses due to contraction and expansion of flow between cross sections are determined during the HEC‑RAS standard step profile calculations....
HEC‑RAS Conveyance Obstructions Conveyance obstructions allow the user to define areas at a cross section that are permanently blocked from conveying flow. Conveyance obstructions...
HEC‑RAS Cross Section Plot Options The HEC‑RAS cross section plots can be customized for specific requirements, as described below. Custom Labels The labels used in the...
HEC‑RAS Element Display Properties You can change the display properties of the following HEC-RAS elements shown on the Map View: River Reaches Cross Sections...
HEC‑RAS Modeling Best Practices The following best practices should be used when defining, analyzing, and reviewing a HEC‑RAS model: The model results should be...
HEC‑RAS Output Cross Section Plots The software can generate cross section plots of the HEC‑RAS steady flow and unsteady flow computational results, displaying the water...
HEC‑RAS Output Water Surface Profile Plots The software can generate profile plots (sometimes called long sections or longitudinal profiles) of the HEC‑RAS steady flow and unsteady flow...
HEC‑RAS Profile Plot Options The HEC‑RAS profile plots can be customized for specific requirements, as described below. Cross Section Landmarks The defined cross sections...
How to Define Levees in HEC-RAS? HEC‑RAS allows the user to define levees to constrain the flow to the main channel by defining a left and/or right...