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The Storm Water Management Model (SWMM) is a dynamic rainfall-runoff simulation model. It was introduced by the U.S. Environmental Protection Agency.

It is used for single event or long-term (continuous) simulation of runoff quantity and quality from primarily urban areas.

The runoff component operates on a collection of subcatchment areas that receive precipitation and generate runoff and pollutant loads. The routing portion transports this runoff through a system of pipes, channels, storage/treatment devices, pumps, and regulators. During each simulation, the quantity and quality of runoff generated within each subcatchment is tracked. The same is done for the flow rate, flow depth, and quality of water in each pipe and channel.

SWmmCAD Input for AutoCAD® imports models created with PCSwmm quickly. Elements that are imported include:
  • Elevations
  • Slopes
  • Pipes
  • Sewers
  • Flow rate
  • Flow depth
There is no need to create or manage layers, choose colors and linetypes. SWmmCAD Input for AutoCAD® takes care of these details for you.
SWmmCAD Input for AutoCAD® uses hatches to indicate the various subcatchment areas. It specifies the total surface and number the subcatchment areas. The information is derived from the models built using PCSwmm.
SWmmCAD Input for AutoCAD® supports the INP, MAP and RTP file formats. These files contains all the information on subcatchment areas.
SWmmCAD Input for AutoCAD® also comes with a sample LPK (Language Pack) file. It is a simple text file that can be edited with NotePAD or any other text file editor. Without the file, SWmmCAD interface is in English. You can translate it at your ease.
You can customize SWmmCAD Input for AutoCAD® to use with any DWG standard specifications:
  • Blocks
  • Layers
  • Colors
  • Linetypes
  • And more
Moreover, the identifications are dynamic blocks whose properties can be edited. Therefore, SWmmCAD Input can meet your company or customer standards and specifications.

Finally, you can manage your customized profiles for future projects.
SWmmCAD Input for AutoCAD® can regenerate the INP, MAP and RPT files for you.
SWmmCAD Input for AutoCAD® remember where the INP, MAP and RPT files came from. It will regenerate the drawing saving you the time to find the input files.
SWmmCAD Input for AutoCAD® can work with your existing project. There is no need to start from scratch.


SWmmCAD Input is a commercial product offering 5 individual days trial.


Purchase, Service and Enquiries

Contact our Sales force for a quote tailored to your situation. Volume discounting starts at low volume. We also offer you to purchase priority product support for a flat annual fee. Priority product supports gives you access to hotfixes, the most senior technical staff upfront and priority in queue.


Note: Allow for 24-48 hours before receiving your serial number(s).


Contact our Support staff for any issues encountered with the product.


Note: Allow for 24-48 hours for a response.


The licenses are locked on a username. At the moment of purchase, you will be contacted by a sales representative. You will have to provide Windows® login / username of the users. The representative will in turn provide you with a license file that you will have to copy into SWmmCAD Input installation folder.

The license file is text editable. It is possible to copy multiple license keys into the same file if the workstation is shared among users.


SWmmCAD need ObjectDCL Runtime Extension for AutoCAD® (ARX) to run.

  • AutoCAD 2006 -> 2013

Version Information

Current Version: 2.6.7
Operating System: WinXP, Win7, 32 and 64 bits
Terms of Use:Commercial product
5 individual days trial
Important Notes:Installation Of ObjectDCL Extension is required


SWmmCAD Input Screenshot Internationalization with SWmmCAD Input

In action

This short animation demonstrate how SWmmCAD Input works.

SWmmCAD Input importing storm water management model file in AutoCAD