Workflow: To Analyze and Edit a Catchment Model in Storm and Sanitary Analysis

Use this workflow after you have exported a AutoCAD Civil 3D model to Autodesk Storm and Sanitary Analysis.

In Storm and Sanitary Analysis, double-click the Project Options node and set up required Project Options. See "Project Options" on page 175 of the Storm and Sanitary Analysis User's Guide.	Specify the Hydrology Method. By default, the first time you bring in data from AutoCAD Civil 3D, this is set to Rational method. See "Hydrology Runoff Specification" on page 178 of the Storm and Sanitary Analysis User's Guide. Specify the Time of Concentration method. Specify the Link Routing Method. Hydrodynamic routing is suggested for Rational Methods. See "Hydraulic Routing Specifications" on page 186 of the Storm and Sanitary Analysis User's Guide.
Set up rainfall options for the project (either an IDF Curve for Rational, or Rain Gage for other methods).	Set up the IDF curve (for the Rational methods). See "IDF Curves" on page 418 of the Storm and Sanitary Analysis User's Guide. or Set up a rain gage for the project (for other methods). See "Defining a Rain Gage" on page 46 and "Rain Gages" on page 408 of the Storm and Sanitary Analysis User's Guide.
Set up required Analysis Options See "Analysis Options" on page 69 of the Storm and Sanitary Analysis User's Guide.	On the General tab, define the analysis duration by modifying the "End Analysis On" values. Choose an adequate analysis duration to cover the rainfall duration and any surface routing. See "Time Steps" and "Dates" on pp. 70-71 of the Storm and Sanitary Analysis User's Guide. On the Storm Selection tab, optionally select the storm analysis options. For example, if you set up multiple storm events for the rain gage in Step 7 above, you can select Multiple Storm Analysis and specify the Output File names for each. See "Storm Selection" on page 76 of the Storm and Sanitary Analysis User's Guide.
Refine subbasins	If you are using a TR-55 or TR-20 Hydrology Method, check the Subbasin Properties and set up the Curve Number for the soil groups for all subbasins. See "SCS TR-55 Curve Numbers" on page 347 of the Storm and Sanitary Analysis User's Guide.
Refine inlets	You may need to adjust the Road & Gutter Specifications and Grates settings in the Inlets dialog box. The settings under "Roadway and Gutter Specifications" section help determine the gutter spread. The Grate Clogging Factor and Roadway/Gutter bypass link direct the water that is not captured by the inlet to the next inlet. The settings under "Combination Inlet Specifications" will vary depending on Inlet Type. See "Inlets Dialog Box" on page 249 of the Storm and Sanitary Analysis User's Guide.
Perform an analysis	Click the Run Analysis button. See "Performing an Analysis" on page 83 of the Storm and Sanitary Analysis User's Guide.
Display analysis results	Create profile plots. See "Profile Plots" on page 133 of the Storm and Sanitary Analysis User's Guide. Create time series plots. See "Time Series Plots" on page 148 of the Storm and Sanitary Analysis User's Guide.
Check the Subbasin Properties for each subbasin and review the peak runoff	The Peak Runoff is displayed in the Analysis Summary area of the Physical Properties tab. See "Analysis Summary Section" on page 345 of the Storm and Sanitary Analysis User's Guide.