The Bottom Line
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.
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.
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