Urban water modeling — design like LEGO, simulate like a twin. StormNET stands on EPA SWMM and operates above it, adding conceptual modeling features that make rich SWMM models faster to build. Performance, hydraulics, and lifecycle cost are evaluated together while the design is still flexible. Real watersheds anchored to real DEM and real rainfall, or synthetic conceptual models for testing and instantly running the global SWMM community's existing library — both first-class.
Three complementary pillars. Start with tutorials for the full workflow, reach for the how-to guide when you need a focused answer, dive into Realtime Help for concepts, methods, and reference.
Step-by-step walkthroughs with screenshots — comprehensive georeferenced model, synthetic basics, and urban-watershed methodology.
Focused procedural answers — concise bullet-by-bullet guidance for common modeling questions across setup, storage units, hydraulics, LID, climate, and controls.
Hierarchically organized knowledge layer — concepts, methods, science, per-element operational help, and foundational engine references.
Two-way enrichment with EPA SWMM. StormNET models live as standard SWMM .INP files — yours exports out, theirs loads in. The bridge is more than file compatibility: StormNET adds a conceptual modeling layer above SWMM — visual LID design (rain gardens, bio-swales, green roofs, permeable surfaces), irregular ponds and wetlands as first-class geo-realistic storage objects, predefined storage units. Load a basic SWMM model, enrich it inside StormNET, save it back as a richer SWMM file. Synthetic mode is the entry point for legacy files; geo-referenced mode anchors new models to real data.
Cost in the loop. StormNET ships with a first-class, physics-based, bottom-up cost engine — not a spreadsheet add-on. Pipes, conduits, manholes, storage units (tanks, ponds, wetlands, irregular geo-realistic shapes), channels, canals, weirs, outfalls, pumps, LID green infrastructure (rain gardens, bio-swales, green roofs, permeable surfaces) — all costed together. Run cost analysis before or after simulation; iterate alternatives in the same view. See the cost model methodology →
Step-by-step walkthroughs covering the full range of StormNET capabilities. Start with the comprehensive georeferenced model that covers site characterization, design storm generation, conduits, catch basins, storage / detention, LID green infrastructure, water quality, groundwater interaction, and 3D visualization. Use the synthetic model as a focused SWMM Quick Start. Use the urban-watershed methodology study to understand subcatchment-level runoff processes without infrastructure distraction.
Focused procedural answers to common StormNET modeling questions — concise bullet-by-bullet guidance, organized in clear categories. Different from the step-by-step tutorials above: less narrative, fewer screenshots, more reach-for-it-when-you-need-it. Open the viewer for a sidebar-navigated reading experience.
Concise bullet-by-bullet guidance, organized across six categories. Click to open the viewer.
Realtime Help is more than a reference library — it's the knowledge layer of the platform. Modeling concepts, governing science, numerical methods, per-element operational help, visualization guidance, and the foundational engine references — organized hierarchically so you can stop at any depth and still have what you need. Especially deep on urban hydrology, sewer system design, combined-sewer dynamics, LID configuration, irregular ponds and wetlands, storage unit libraries, the SWMM input grammar, and the bottom-up location-aware cost engine.
StormNET is built on the EPA's SWMM (Storm Water Management Model). These are the authoritative reference manuals — the numerical engine documentation, hydraulic theory, water quality science, and cost analysis methods.