Storm sewer networks consist of pipes and structures. There are three types of sewer structures in Carlson Hydrology Module. Box Structures are usually used to support inlet openings and connect them to the underground piping system. Circular Structures are manholes that provide access to the sewer network for inspection and maintenance. Manholes are usually installed where pipe horizontal direction changes, where pipe slope changes, where two or more pipes join, or where the pipe size changes. Outfalls are outlet structures at the sewer outfalls. A regular outfall may consist of a headwall and two wingwalls, while a funnel outfall consists of a funnel shape structure. The details of the design and construction of sewer structures can be found in the HEC-22 manual.
The Sewer Structure Library command allows you to create, edit and store structures. The library data file is stored in the ...\USER folder and is available for all projects.
From the Network > Sewer Network Libraries menu in the Hydrology Module, select Sewer Structure Library to open the dialog. The dialog lists all sewer structures by their ID, type and dimensions. Click on New button to create a new structure, choose a structure type and click on OK button to open the structure dialog. The Edit button allows you to modify an existing structure, and the Delete button removes the highlighted structure from the library. Load and SaveAs buttons allow you to load and save the structure data.
|
| Sewer Structure Library |
|
| New Sewer Structure |
In the Box Structure dialog, type the name of the structure in the Structure ID box, enter the length and width of the structure and click on OK button to commit the structure entry.
 |
| Box Structure |
In the Structure ID box, type the structure name. Select a Taper Format and enter the Bottom Diameter, Top Diameter, Taper Offset and Taper Height of the structure. A graphic box on the right side of the dialog displays the graphic of the currently defined manhole. Click on OK button to commit the structure entry.
 |
| Circular Structure |
In the Structure ID box, type the structure name. For the regular outfalls, enter the dimensions of the headwall and wingwalls. For the funnel type outfalls, enter the length and width of the funnels. Click on OK button to commit the structure entry.
 |
| Outfall Structure |
 |
| Funnel Type Outfall Structure |
Sewer Structure Library dialog: Fill in values.
Pulldown Menu Location: Network
> Sewer Network Libraries > Sewer Structure Library
Keyboard Command: strlib
Prerequisite: None
File Name: \lsp\cntr_grd.arx