In GeoSTORM software, the Recompute Roadway Crossing Properties command allows the user to recompute roadway crossing properties such as culvert barrel length, and upstream and downstream invert elevations based upon connected routing junctions and catch basin inlets.
Follow the steps below to use the Recompute Roadway Crossing Properties command:
- From the Input ribbon menu, click on Roadway Culverts dropdown menu and select the Recompute Roadway Crossing Properties command.
- The Recompute Roadway Crossing Properties dialog box will be displayed as shown below.
The following sections describe how to use the Recompute Roadway Crossing Properties command and interact with the above dialog box.
Selecting Roadway Crossings
The Select Roadway Crossings section allows the user to select roadway crossings for which properties such as culvert barrel length, and upstream and downstream invert elevations are to be recomputed. This section includes a table that lists all the roadway crossings contained within the current scenario of the project, as shown below.
The user can select roadway crossings using any of the following methods for recomputing properties:
- By pressing and holding down the [Ctrl] key while selecting the roadway crossings directly from the Map View. Immediately after selecting the roadway crossings, open the Recompute Roadway Crossing Properties dialog box, and the selected roadway crossings will be shown as selected/checked within the Select Roadway Crossings section.
- By checking the checkboxes corresponding to each roadway crossing in the Select Roadway Crossings section.
- By clicking the [Pick] button, the Recompute Roadway Crossing Properties dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select the roadway crossings from the Map View. After selecting roadway crossings, pressing the [Enter] key or right-clicking and choosing Done from the displayed context menu redisplays the Recompute Roadway Crossing Properties dialog box.
After selecting roadway crossings, the total number of selected roadway crossings will be displayed in the Total selected read-only field, as shown below.
Roadway Crossing Properties
This section is used to define the elevation data source and other parameters to be used to recompute properties for the selected roadway crossings.
Terrain Elevation Source
Depending upon the terrain elevation source type selected, the content of the Roadway Crossing Properties section changes to specify additional elevation data information.
The Terrain elevation source dropdown combo box supports the following surface types:
- CAD Drawing
- Elevation Grid
- GIS Contours
- LandXML Data
- Terrain Surface
- TIN Surface
CAD Drawing
If the user selects CAD Drawing as the terrain elevation source, the content of the Roadway Crossing Properties section changes, as shown below.
The following options are displayed when CAD Drawing is selected as the terrain elevation source:
- CAD drawing layer
This dropdown combo box allows the user to select the CAD drawing layer available in the project.
- Drawing layers
Clicking the [Define] button adjacent to the Drawing layers entry displays the CAD Drawing Layers dialog box, allowing the user to define the properties of the drawing layers.
Elevation Grid
If the user selects Elevation Grid as the terrain elevation source, the content of the Roadway Crossing Properties section changes, as shown below.
The following option is displayed when Elevation Grid is selected as the terrain elevation source:
- Elevation grid layer
This dropdown combo box allows the user to select the elevation grid layer available in the project.
GIS Contour
If the user selects GIS Contours as the terrain elevation source, the content of the Roadway Crossing Properties section changes, as shown below.
The following options are displayed when GIS Contours is selected as the terrain elevation source:
- GIS polyline layer
This dropdown combo box allows the user to select the GIS polyline layer type.
- Elevation attribute
This dropdown combo box allows the user to select the elevation attribute type.
LandXML Data
If the user selects LandXML Data as the terrain elevation source, the content of the Roadway Crossing Properties section changes, as shown below.
The following options are displayed when LandXML Data is selected as the terrain elevation source:
- TIN surface layer
This dropdown combo box allows the user to select the TIN surface layer type.
- TIN surface
This dropdown combo box allows the user to select the TIN surface type.
Terrain Surface
If the user selects Terrain Surface as the terrain elevation source, the content of the Roadway Crossing Properties section changes, as shown below.
The following option is displayed when Terrain Surface is selected as the terrain elevation source:
- TIN surface layer
This dropdown combo box allows the user to select the TIN surface layer type.
TIN Surface
If the user selects TIN Surface as the terrain elevation source, the content of the Roadway Crossing Properties section changes, as shown below.
The following options are displayed when TIN Surface is selected as the terrain elevation source:
- TIN surface layer
This dropdown combo box allows the user to select the TIN surface layer type.
- TIN surface
This dropdown combo box allows the user to select the TIN surface type.
After selecting the terrain elevation source, the user can select or define the following options to recompute roadway crossings properties:
- Culvert barrel length
This checkbox option is used to recompute the length of the culvert barrel.
- Upstream and downstream invert elevations
This checkbox option is used to recompute the culvert invert elevations at the upstream (inlet) and downstream (outlet) ends.
- Manning’s roughness
This checkbox entry field is used to define the culvert Manning’s roughness. The user can manually enter the Manning’s roughness value in the entry field next to this checkbox option. Alternatively, clicking the […] browse button displays a Manning’s Roughness lookup dialog box, which allows the user to choose the Manning’s roughness coefficient to be assigned to a roadway crossing.
- Entrance loss coefficient
This checkbox entry field is used to define the head loss coefficient at the pipe inlet as the flow enters into the pipe from a node (i.e., manhole, junction, routing junction, catch basin, or storage area). The user can manually enter the culvert entrance loss coefficients in the entry field next to this checkbox option. Alternatively, clicking the […] browse button displays the Culvert Entrance Loss Coefficients lookup dialog box, which allows the user to choose an entrance loss coefficient to be assigned to a roadway crossing.
- Exit loss coefficient
This checkbox entry field is used to define the head loss coefficient at the pipe outlet as the flow leaves the pipe and enters into a node (i.e., manhole, junction box, routing junction, catch basin, or storage area). The user can manually enter the culvert exit loss coefficients in the entry field next to this option. Alternatively, clicking the […] browse button displays the Culvert Exit Loss Coefficients lookup dialog box, which allows the user to choose an exit loss coefficient to be assigned to a roadway crossing.
Computing Roadway Crossing Properties
Once data have been defined in the Recompute Roadway Crossing Properties dialog box, click the [Compute] button and the software will recompute the properties of the selected roadway crossings.