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OpenFlows SewerGEMS

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OpenFlows SewerGEMS

Urban Sanitary and Combined Sewer Modeling Software

Produce Optimal Urban Sewer Planning and Overflow Remediation Analysis Designs

Model from within several platforms while accessing a single, shared project data source.


OpenFlows SewerGEMS enables you to produce optimal urban sewer planning and overflow remediation analysis designs in an easy-to-use environment. You can design and operate sanitary or combined conveyance sewer systems by using built-in hydraulic and hydrology capabilities with a variety of dry- and wet-weather calculation methods. Better understand surface flood depth and velocity, flood hazard, and inundation times with the new user-friendly 1D/2D hydraulic analysis capability.

Access A Single, Shared Project Data Source

Collaborate without surrendering individual skills, maintaining a single modeling data set without restrictions. Model within Windows, ArcGIS, AutoCAD, OpenRoads, OpenSite, or OpenRail.

1D/2D Hydraulic Analysis

User-friendly tools connect 1D network elements with 2D surface flows. Better understand surface flooding depth and velocity, flood hazard, and inundation times, and communicate this information to stakeholders with versatile mapping and reporting tools.

Understand Results More Easily

Spot bottlenecks and potential surcharging with animated 3D graphs and profiles. Use color coding, element symbology, and annotation to visualize input and results.

Easy Model Management With Scenarios

Configure, evaluate, visualize and compare an unlimited number of scenarios within a single file.

Leverage Existing Data

Use your CAD drawings, GIS files, SWMM, SCADA data, databases, and spreadsheets to jumpstart the model-building process.

Input And Save Unlimited Flow Patterns

Model flow changes over the course of a day. Load models with wet weather runoff flows from precipitation using built-in rainfall distributions or user-defined rainfall events.

OpenFlows SewerGEMS is a superset of OpenFlows SewerCAD, CivilStorm and StormCAD.

*Prices vary per region. For more options, see licensing and subscriptions section.

User Quote

"The new 1D/2D functionality in OpenFlows SewerGEMS is a powerful tool for flood modeling and hydraulic analysis of stormwater systems overflowing. The user-friendly interface and intuitive surface grid creator make working with real surface areas easy and fun. It provides comprehensive visualization options, both with in-built and external tools. As we deal with climate change, it is imperative to be able to prepare for new challenges in water retention in both urban and city environments.."

— M.Sc. Eng. Paweł Suchorab, Faculty of Environmental Engineering, Lublin University of Technology


OpenFlows Software Resources

Licensing and Subscription options

Choose What is Right for You

One-year license with training

Virtuoso Subscription – A popular choice for small and medium-sized businesses

Get access to software that comes with training – fast! Bentley’s eStore, Virtuosity, offers a convenient way to lease a 12-month license of Bentley software for a low, upfront cost. Every online purchase through Virtuosity comes as a Virtuoso Subscription that includes training and auto-renewals.

With no contract required, it’s easy to get started quickly.

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One-time purchase with support

Perpetual License with SELECT

A perpetual license of Bentley software is a one-time purchase, with a yearly maintenance subscription, called SELECT. This includes 24/7/365 technical support, learning resources, and the ability to exchange licenses for other software once a year. With SELECT, you will benefit from:

  • License pooling, so you can access your software from multiple computers.
  • Access additional Bentley software with Term Licenses, which allow you to pay for what you use without the upfront cost of purchasing a perpetual license.

Annual renewal quotes are delivered directly to your inbox, and our experienced Renewal Representatives are available to answer your questions and guide you through any changes you’d like to make.

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Enterprise Organizations

We’ve got your back

For larger organizations with in-depth requirements, we offer plans to provide global pricing and access to our comprehensive portfolio of solutions and success plan services. Contact us about how to get access to software, global best practices, implementation services, training, and technical support to help your organization realize its full potential while addressing your unique needs.

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Design and Operate Urban Sanitary and Combined Sewer Systems