Chapter 14: Storm and Sanitary Analysis
Create a catchment object. Catchment objects are the newest object type that Civil 3D can use to determine the area and time of concentration of a site. You can create a catchment from surface, but in most cases you will use the option to create from polyline.
Master It Create a catchment for predeveloped conditions on the site.
Solution
1. Open the file Mastering Catchment Creation.dwg.
2. On the Analyze tab, choose Catchments Create Catchment Group.
3. Name the new catchment group Predeveloped and click OK.
4. On the Analyze tab, select Catchments Create Catchment From Object.
5. Select the red closed polyline that represents the catchment. When prompted for the flow path, select the polyline that runs through the site. Be sure to select it on the north part of the site (the uphill side).
6. In the Create Catchment dialog, name the catchment Basin A. Leave all other styles and settings at their defaults and click OK. You now have a completed catchment.
Export pipe data from Civil 3D into SSA. Civil 3D by itself cannot do pipe flow or runoff calculations. For this reason, it is important to export Civil 3D pipe networks into the Storm And Sanitary Analysis portion of the product.
Master It Verify your pipe export settings and then export to SSA.
Solution
1. Open the file Export to SSA.dwg.
2. Select the Settings tab, then choose Pipe Networks, and click Commands.
3. Double-click the EditInSSA option.
4. Expand the Storm Sewers Migration Defaults area.
5. Click the field for part matching defaults. Click the ellipsis to open the Part Matchup Settings dialog.
6. Examine the Import tab and verify that the settings make sense. Switch to the Export tab and examine your options for bringing files back into Civil 3D. No changes are needed. Click OK.
7. Click OK to exit the command settings.
8. Switch to the Analyze tab in Civil 3D. Click Edit In Storm And Sanitary Analysis.
9. Click OK to export the Highway Drainage storm network.
10. When Storm Sewers launches, click OK to create a new project.
11. Click No to saving the log file. Switch to the Plan View tab.
12. Double-click one of the structures. Make sure it contains elevation data.
13. Save the SSA file and exit.