Home / OpenFlows WaterGEMS

OpenFlows WaterGEMS

OpenFlows Software Logo White

OpenFlows WaterGEMS

Water Distribution Analysis and Design Software

Deliver High-Quality Hydraulic Projects with Minimal Capital Investment

The most flexible and comprehensive solution for water systems engineering, planning, and operations.


OpenFlows WaterGEMS provides you with a comprehensive yet easy-to-use decision-support tool for water distribution networks. The software helps improve your knowledge of how infrastructure behaves as a system, how it reacts to operational strategies, and how it should grow as population and demands increase. From fire flow and water quality simulations, to criticality and energy cost analysis, OpenFlows WaterGEMS has everything you need in a flexible multiplatform environment. OpenFlows WaterGEMS is a superset of OpenFlows WaterCAD.

Intelligent Planning

Efficiently identify potential problems, accommodate service area growth, and plan/prioritize capital improvement projects by using criticality analysis, DMA planning, and pressure management tools to identify potential projects.

Optimized Operations

Use real-time data to analyze energy use and costs, maximize operational efficiencies, minimize disruptions, and intelligently respond to emergencies.

Build and Update Models Faster

Intuitive to use so you can easily jumpstart your modeling process with geospatial data, CAD drawings, databases, and spreadsheets. Apply automated calibration, leak detection, design, rehabilitation, and pump operations.

Identify Water Loss

Use field data to quantify nonrevenue water and help pinpoint loss locations faster.

Assess Fire Flow Capacity

Use automated workflows to access and identify inadequacies in fire protection.

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

User Quote

“Using Bentley's OpenFlows WaterGEMS, we are able to come up with the right design for our water system ... and we could maintain an affordable water supply, which we commit to provide in our concessionaire.”

— Renald Cuevas, Engineer, Baliwag Water District 


OpenFlows Software Resources

Frequently Asked Questions

A hydraulic modeling application, WaterGEMS provides an easy-to-use environment for you to confidently analyze, design, and optimize your water distribution systems. With advanced interoperability, geospatial model building, optimization, and asset management capabilities, WaterGEMS supports your engineering workflows from fire flow and water quality analysis, to energy consumption and capital cost management.

The price of OpenFlows WaterGEMS varies per region. While there are various types of licensing available, a common choice is the 12-month practitioner license offered through Virtuosity, Bentley’s eCommerce store. When you purchase through, Virtuosity you get a Virtuoso Subscription. This means you get the software and “Keys” (tokens) to redeem for customizable training, mentoring, and consulting services.

  • Grow with confidence
    Whenever system growth is anticipated, effectively identify potential problem areas, accommodate service area growth, and plan capital improvements.

  • Minimize disruptions
    Operation of complex water systems can be difficult. Avoid disruptions by realistically modeling system inefficiencies, optimize pumping strategies, and planning for shutdowns and routine operations.

  • Prioritize renewal decisions
    Renewing or replacing your systems can be overwhelming with the amount of information to consider. Make this task easier when you analyze and compare a wide range of variables for system sustainability.

  • Work in multiple platforms seamlessly
    Eliminate the frustration and enjoy the power and versatility of working across CAD, GIS, and stand-alone platforms while accessing a single, shared, project data source. With superior interoperability, choose from Windows stand-alone, ArcGIS for GIS integration, MicroStation, and AutoCAD.

  • Synchronize model building
    Jumpstart your modeling process with geospatial data, CAD drawings, databases, and spreadsheets. Easily connect with virtually any digital data format to allocate water demands and node elevations with geospatial data found in shapefiles, geodatabases, various types of DEMs, and even CAD drawings.

  • Avoid manual-input mistakes
    Drawing and connectivity review tools guarantee a hydraulically coherent model. Automatically remove network complexity while maintaining hydraulic equivalence, to tackle a wide range of modeling applications more efficiently.

  • Optimize model calibration, design, and operations
    Use state-of-the-art genetic algorithm optimization engines to make reliable decisions based on accurate hydraulic simulations of the real world. Evaluate millions of possible solutions to quickly find a calibration hypothesis that best matches measured flows, pressures, and on/off status.

  • Forecast operating conditions and potential issues
    Easily publish WaterGEMS model results to existing SCADA control room screens to support forecasting. Create a real-time simulator that accurately represents current system conditions.

  • Readily identify cost savings
    Analyze data automatically to quickly identify the most energy-efficient pump scheduling strategy, or how to minimize energy use to reduce costs.

WaterGEMS’ SCADAConnect module lets you automatically acquire supervisory control and data acquisition (SCADA) data, creating a real-time system simulator that accurately represents current system conditions. It also enables WaterGEMS model results to be published to a utility’s existing SCADA control room screen(s), helping to forecast operating conditions and potential issues.

Darwin Designer automatically finds maximum benefit or minimum-cost designs and rehabilitation strategies, based on available budget, construction cost, and pressure and velocity constraints. You can also analyze energy consumption to identify the most energy-efficient pump scheduling strategy. Darwin Scheduler optimizes the operations of fixed- and variable-speed pumps, and tank storage, to minimize energy usage or energy cost, based on pressure, velocity, pump start, and tank level constraints. Energy costs can be aggregated across pumping stations and factor in complex tariffs as well as non-model-related energy costs, to perform net present value analysis of your operating scenarios.

WaterGEMS is a superset of WaterCAD. WaterGEMS includes a standalone version plus the integration with three platforms MicroStation, AutoCAD, and ArcGIS. Additionally, WaterGEMS comes with six modules for optimal operation planning and automatized model calibration that are not included in WaterCAD: 1) Pipe Renewal Planner 2) Darwin Designer 3) Darwin Calibrator 4) Darwin Scheduler 5) Skelebrator 6) SCADAConnect.

No. WaterGEMS can be used as a standalone product. Additionally, enjoy the power and versatility of working across multiple applications with superior interoperability. Choose from Windows stand-alone, ArcGIS for GIS integration, MicroStation, and AutoCAD.

No. Unlike other platforms, WaterGEMS includes all calculation capabilities.

Refer to the ‘System Requirements’ section of the OpenFlows WaterGEMS page.

Platform pre-requirements
WaterGEMS runs without platform restrictions as a stand-alone application. It also runs from within ArcGIS, AutoCAD, and MicroStation. 

For the most up-to-date system requirements, visit Bentley Communities.

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.

Shop Now

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.

Contact Us

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.

Contact Us

Best-Selling Water Resources Textbook

Computer Applications in Hydraulic Engineering

This fully updated 9th edition textbook is available for download! Ideal for engineers and students in hydraulics and hydrology, offering theory and real-world applications with problem-solving and modeling exercises featuring OpenFlows WaterGEMS, HAMMER, SewerGEMS, SewerCAD, PondPack, StormCAD, FlowMaster and CulvertMaster.

Intelligent decisions for water distribution

Celebrate Infrastructure Delivery & Performance Excellence

The 2024 Year in Infrastructure
and Going Digital Awards

Nominate a project for the most prestigious awards in infrastructure! Extended deadline to enter is April 29th.