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Best OpenFlows SewerGEMS Alternatives ranked by AI · updated Aug 2026

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OpenFlows SewerGEMS is a hydraulic modeling application for sanitary, storm, and combined sewer systems. It is intended for utilities and civil engineers who need GIS and CAD integration, network design, scenario analysis, and operational modeling.

Developer: Bentley Systems Price: N/A 🎯 bentley.com/software/openflows-sewergems
hydraulic modeling hydrology drainage stormwater modeling

Top 6 OpenFlows SewerGEMS alternatives

1 Storm Water Management Model logo

Storm Water Management Model

U.S. Environmental Protection Agency

Storm Water Management Model is a dynamic rainfall-runoff and hydraulic simulation tool for urban drainage, stormwater, and combined sewer systems. It is...

Pros

  • Free and widely accepted for academic, consulting, and regulatory work
  • Supports detailed urban runoff, conveyance, storage, pumps, and control modeling
  • Open file format and extensive third-party ecosystem

Cons

  • Less polished graphical workflow than commercial tools such as InfoWorks ICM
  • Requires more manual setup and model checking than PCSWMM
  • Limited integrated GIS, asset management, and collaboration features

Free

Alternatives to Storm Water Manage... → Visit site
2

HEC-HMS

HEC-HMS is a hydrologic modeling software also developed by the U.S. Army Corps of Engineers.

Pros

  • Integrates well with HEC-RAS
  • Good for watershed modeling

Cons

  • Less focused on hydraulic modeling
  • Requires separate software for detailed hydraulics

Free

Alternatives to HEC-HMS →
3

InfoWorks ICM

Autodesk

InfoWorks ICM is an integrated catchment and drainage modeling platform for wastewater, stormwater, rivers, and surface-water systems. It is designed for utilities,...

Pros

  • Strong combined sewer, stormwater, river, and flood modeling
  • Advanced 1D and 2D simulation capabilities
  • Supports large, complex catchment models and scenario analysis

Cons

  • More demanding to learn than simpler sewer modeling tools
  • Can require substantial computing resources for detailed 2D models
  • Focused on hydraulic modeling rather than full utility asset management

N/A

Alternatives to InfoWorks ICM → Visit site
4

MIKE+

DHI

MIKE+ is an urban water modeling platform for water distribution, wastewater collection, stormwater, rivers, and urban flooding. It serves utilities, consultants, and...

Pros

  • Covers water, wastewater, stormwater, and urban flooding in one platform
  • Strong integrated catchment and network modeling
  • Supports detailed 1D and 2D hydraulic analysis

Cons

  • Broad functionality creates a steeper learning curve
  • Commercial licensing and training can be expensive
  • May be more platform than a small utility needs

N/A

Alternatives to MIKE+ → Visit site
5

PCSWMM

Computational Hydraulics International

PCSWMM is a commercial interface and modeling environment built around EPA SWMM for urban drainage and stormwater analysis. It is designed for...

Pros

  • Adds a more capable GIS and workflow environment to the EPA SWMM engine
  • Strong calibration, sensitivity, reporting, and scenario tools
  • More accessible for urban drainage teams than raw SWMM workflows

Cons

  • Focused primarily on SWMM-based drainage rather than broad hydraulic design
  • Commercial licensing costs more than EPA SWMM itself
  • Less comprehensive for river and advanced 2D flood modeling than InfoWorks ICM

Commercial, quote-based

Alternatives to PCSWMM → Visit site
6

XPSWMM

Innovyze, an Autodesk company

XPSWMM is a commercial stormwater and wastewater modeling package for rainfall-runoff, pipe networks, storage, controls, and flooding. It serves consultants and infrastructure...

Pros

  • Provides a familiar SWMM-oriented approach with a richer commercial interface
  • Supports detailed drainage networks, controls, and storage structures
  • Offers stronger 2D flood and surface-flow workflows than basic SWMM

Cons

  • Paid licensing is a major disadvantage versus EPA SWMM
  • Interface and data workflows take time to master
  • Model portability may be less straightforward than native SWMM files

N/A

Alternatives to XPSWMM → Visit site

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