In GeoSTORM software, the Recompute Roadway Segment Properties command allows the user to recompute roadway segment properties based on the connected routing junctions and catch basin inlets.
Follow the steps below to use the Recompute Roadway Segment Properties command:
- From the Input ribbon menu, click on the Roadway Gutter/Ditch/Inlets dropdown menu and select the Recompute Roadway Segment Properties command.
- The Recompute Roadway Segment Properties dialog box will be displayed.
The following sections describe how to use the Recompute Roadway Segment Properties command and interact with the above dialog box.
Selecting Roadway Segments
The Select Roadway Segments section allows the user to select single or multiple roadway segments for which properties are to be recomputed. This section includes a table that lists all the roadway segments contained within the current scenario of the project, as shown below.
The user can select roadway segments using any of the following methods for recomputing properties:
- By pressing and holding down the [Ctrl] key while selecting the roadway segments directly from the Map View. Immediately after selecting the roadway segments, open the Recompute Roadway Segment Properties dialog box, and the selected roadway segments will be shown as selected/checked within the Select Roadway Segments section.
- By checking the checkboxes corresponding to each roadway segment in the Select Roadway Segments section.
- By clicking the [Pick] button, the Recompute Roadway Segment Properties dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select the roadway segments from the Map View. After selecting roadway segments, pressing the [Enter] key or right-clicking and choosing Done from the displayed context menu redisplays the Recompute Roadway Segment Properties dialog box.
After selecting roadway segments, the total number of selected roadway segments will be displayed in the Total Selected read-only field, as shown below.
Sorting the Roadway Segments Table
The data in the Select Roadway Segments table can be sorted by multiple columns. The user can sort the data by holding down the [Shift] key while clicking the Up or Down arrows in the column headers. This allows for multi-column sorting without losing the previous sort. The sorting order is determined by the sequence in which the column headers are selected.
Follow the steps below to sort the data by using multiple columns:
- Select the header of the first column and click the Up or Down arrow to sort the data in ascending or descending order.
- Hold down the [Shift] key, then select the header of the second column and click the Up or Down arrow to sort the second column.
- Repeat step 2 to sort the data of any additional column.
For example, first, select the Length column and click the Down arrow to sort the data in descending order. Then, while holding the [Shift] key, select the Downstream Invert Elevation column and click the Up arrow to apply a secondary sort.
Roadway Segment Properties
This section is used to define the elevation data source and other parameters to be used to recompute the properties for the selected roadway segments.
Terrain Elevation Source
Depending upon the terrain elevation source type selected, the content of the Roadway Segment 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 Segment 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
Click the [Define] button adjacent to the Drawing layers entry to display the CAD Drawing Layers dialog box, allowing the user to define the properties of the drawing layers, as shown below.
Elevation Grid
If the user selects Elevation Grid as the terrain elevation source, the content of the Roadway Segment 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 Contours
If the user selects GIS Contours as the terrain elevation source, the content of the Roadway Segment 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 Segment 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 Segment Properties section changes, as shown below.
The following option is displayed when the Terrain Surface is selected as the terrain elevation source:
- Terrain surface layer
This dropdown combo box allows the user to select the terrain surface layer type.
TIN Surface
If the user selects TIN Surface as the terrain elevation source, the content of the Roadway Segment 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 resource, the user can proceed with the following roadway segment properties to be recomputed for the selected roadway segments.
- Roadway segment length
This checkbox option is used to recompute the roadway segment length.
- Upstream and downstream invert elevation
This checkbox option is used to recompute the invert elevations of roadway segments on the upstream (inlet) and downstream (outlet) ends.
- Entrance loss coefficient
This checkbox entry field allows the user to define the head loss coefficient associated with energy losses at the roadway segment inlet as flow enters the roadway segment from a node (i.e., routing junction). Alternatively, clicking the […] lookup button displays the Entrance Loss Coefficients For Pipes lookup dialog box, which allows the user to choose an entrance loss coefficient to be assigned to the selected roadway segments.
Note that in an open channel cross section where the discharge is already channelized, an entrance loss coefficient of 0.0 should be used (i.e., no head loss). For complete head loss, such as a storage area flow entering a roadway segment, a coefficient of 1 should be entered.
- Exit loss coefficient
This checkbox entry field allows the user to define the head loss coefficient associated with energy losses at the roadway segment outlet as the flow leaves the roadway segment and enters a node (i.e., routing junction). Alternatively, clicking the […] lookup button displays the Exit Loss Coefficient For Pipes lookup dialog box, which allows the user to choose an exit loss coefficient to be assigned to the selected roadway segments.
Note that for no head loss, such as roadway segment flow entering another roadway segment, a coefficient of 0 should be entered. For complete head loss, such as roadway segment flow entering a storage area, a coefficient of 1 should be used.
Computing Roadway Segment Properties
Once data have been defined in the Recompute Roadway Segment Properties dialog box, click the [Compute] button and the software will recompute the properties of the selected roadway segments.