Causeway Flow
Commercial
Storm and foul water drainage design and 1D hydraulic modelling software for UK and Irish civil engineers.
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
Ranked by the topics, categories and workflow stages they share with OpenFlows SewerGEMS.
LocalSWMM
Open Source
Browser-based urban stormwater and drainage modeling powered by OpenSWMM 6 compiled to WebAssembly.
EPA SWMM
Gov-PublicVerified
The public-domain engine of urban drainage: dynamic-wave pipe networks, runoff, LID and water quality.
InfoWorks ICM
Commercial
Autodesk's integrated catchment model — the heavyweight for large sewer networks and coupled 2D flooding.
PCSWMM
Commercial
CHI's commercial GIS front-end for SWMM — the most direct productivity upgrade for serious SWMM users.
Generate SWMM inp (QGIS plugin)
Open Source
Build and read EPA SWMM models as QGIS layers — free GIS-based SWMM model construction.