Hydraulics and Hydrology Features

Autodesk Civil 3D includes additional software applications that allow you to perform a variety of storm water management tasks, including storm sewer design, watershed analysis, detention pond modeling, and culvert, channel, and inlet analysis.

External applications can be used to add hydraulics and hydrology property information to Autodesk Civil 3D pipe networks. It is also possible to add hydraulics and hydrology property information directly to Autodesk Civil 3D pipe networks.

The applications are typically installed by default when you install Autodesk Civil 3D. If you chose not to install them when you first installed Autodesk Civil 3D, they can be installed later using Add or Remove Programs from the Control Panel.

The following table describes the hydraulics and hydrology extensions available with Autodesk Civil 3D.

Application	Description
Autodesk Storm and Sanitary Analysis	Autodesk® Storm and Sanitary Analysis is a comprehensive hydrology and hydraulic analysis application. It helps you plan and design urban drainage systems, storm sewers (including highway drainage systems), and sanitary sewers. Autodesk Storm and Sanitary Analysis integrates stormwater and wastewater analysis during planning and design, which helps you improve overall project productivity and increase your engineering capabilities.
Hydraflow Storm Sewers Extension	Enables you to perform storm sewer design and analysis on pipe network models. It is designed primarily for hydraulic and hydrologic analysis of simple and complex storm sewer networks with pavement drainage and inlet analysis. It can also be used as to determine the hydraulic grade line in an existing system, or for planning or designing new systems. Using Storm Sewers, you can add hydraulic information, such as hydraulic grade lines and energy grade lines, to Autodesk Civil 3D pipe network models.
Hydraflow Hydrographs Extension	Used for detention pond design and modeling of simple or complex watersheds using the SCS and/or Rational methods. This extension lets you perform a host of functions, including hydrograph combining, channel reach and pond routing, and hydrograph diverting.
Hydraflow Express Extension	Provides a collection of calculators for solving hydraulics and hydrology tasks on culverts, channels, inlets, hydrology, and weirs. You can model and design culverts with circular, box, elliptical, and arch shapes; compute normal-depth rating curves for rectangular, trapezoidal, triangular, compound gutter, circular, and user-defined channel shapes. You can also calculate hydraulics for six inlet types, including curb, grate, combination, drop curb, drop grate, and slotted. This extension supports SCS, Rational, and Modified Rational methods for computing a single hydrograph.