Delta Hydro Studio
FreemiumVerified
Browser-based hydrology and hydraulics calculators for practising engineers — no install, report-ready output.
Urban Stormwater & InfrastructureActiveRational MethodCulvert Sizing
OpenFlows SewerGEMS
ActiveBentley's sanitary and combined sewer modelling suite, integrated with CAD and GIS environments.
by Bentley Systems
- Pricing
- Commercial
- License
- Proprietary
- Commercial use
- Permitted
- Ecosystem
- MicroStation, AutoCAD, ArcGIS
- Platform
- Windows
About OpenFlows SewerGEMS
SewerGEMS is Bentley's dynamic sewer model: sanitary and combined systems, dynamic-wave routing (including an embedded SWMM solver option), pump stations, control rules and design tools, runnable standalone or inside MicroStation, AutoCAD and ArcGIS. Utilities already standardised on Bentley OpenFlows (WaterGEMS for distribution) often pick it for the shared platform and support channel.
Functionally it competes head-on with InfoWorks ICM and PCSWMM; the choice usually follows the organisation's existing CAD/GIS estate rather than engine capability.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
Alternatives to OpenFlows SewerGEMS
Other urban stormwater & infrastructure tools covering similar workflow stages.
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Python interface to the SWMM engine — step through simulations, read state, and control gates in real time.
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EPA SSOAP Toolbox
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EPA's toolbox for sanitary sewer overflow planning — RDII analysis with the SWMM engine underneath.
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Generate SWMM inp (QGIS plugin)
Open Source
Build and read EPA SWMM models as QGIS layers — free GIS-based SWMM model construction.
Urban Stormwater & InfrastructureActiveSWMMQGIS Hydrology