ASCE · EWRI · Urban Water Resources Research Council

Advancing the practice of stormwater modeling.

We bring together engineers, researchers, software developers and educators to define best practices, share open resources and build the next generation of tools that communities rely on to manage stormwater.

Get involved Explore our work

40+committee members

4active task committees

Tool-neutralopen to every platform

Who we are

A tool-neutral community of practice for everyone who models urban water.

The Stormwater Modeling Committee is a technical committee of the Urban Water Resources Research Council (UWRRC) within ASCE’s Environmental & Water Resources Institute. Our members work across consulting firms, universities, public agencies and software developers.

We welcome every modeling platform, from SWMM and HEC-RAS to InfoWorks ICM and HydroCAD. What unites us is a commitment to models that are transparent, reproducible and worthy of the decisions built on them.

Collaboration

Connecting practitioners, academics, regulators and developers to work on shared problems through focused task committees.

Education

Publishing guidance, recording tutorials and running workshops that lower the barrier to entry and raise the bar for practice.

Innovation

Advancing open engines, testing standards, real-time control and AI-assisted workflows that move the field forward.

Current initiatives

Task committees doing the work

Each initiative is led by committee volunteers and produces practical deliverables: standards, test suites, guidance and training. Every one of them welcomes new contributors.

Active

Design Storm Standards

Toward a national standard for design storms: shaping hyetographs that conform to NOAA Atlas 14/15 at every duration and retiring outdated SCS distributions.

Led by Mitch Heineman

Active

SWMM Testing Protocol

A version-controlled benchmark suite any SWMM engine or fork can run to demonstrate it reproduces the reference hydrology and hydraulics.

Led by Bryant McDonnell

Active

Real-Time Systems

Guidance for coupling models with sensors, forecasts and control logic so stormwater infrastructure can respond during the storm, not after it.

Led by Robert Dickinson

Active

Teaching Tools

Open training material for the next generation of modelers: video tutorials, workshops, example models and an online SWMM reference manual.

Led by Michael Gregory & Scott Jeffers

Knowledge hub

Learning & modeling resources

A curated set of references, software and learning material recommended by committee members.

Official

EPA SWMM

Downloads, manuals and release notes for the Storm Water Management Model.

Source code

SWMM on GitHub

The USEPA reference source code for the SWMM computational engine.

Community

OpenSWMM

Community hub for the open SWMM ecosystem: documentation, knowledge base and training.

Python

PySWMM

Python interface to SWMM for scripting, automation and real-time control studies.

Tutorials

SWMM5.org

Robert Dickinson’s free SWMM5 tutorials, ICM Ruby scripts and interactive modeling tools.

Articles

Mel Meng on Medium

Practical articles on hydraulic modeling, automation and modeling workflows.

Documentation

Bentley SewerGEMS SWMM

Reference pages for the SWMM solver as implemented in Bentley SewerGEMS.

Rainfall

NetSTORM

Rainfall analysis software for IDF statistics, event analysis and design storms.

Data sources for modeling

Where to find precipitation, flow, topography, land cover, soils and building data for your next model.

Browse data sources

Video library

Talks, tutorials and Modeler Minute presentations from the committee on our YouTube channel.

Watch on YouTube

Events

Where to find us

Conferences where committee members present, convene and host sessions. Come say hello, or bring your own work.

Feb 202724 – 26

International Conference on Water Management Modeling (ICWMM)

Toronto, Ontarioicwmm.org

Event site

Mar 20271 – 5

ASCE2027: The Infrastructure & Engineering Experience

Philadelphia, Pennsylvaniaexperience.asce.org

Home of the 2027 EWRI Congress

Event site

Jun 20276 – 11

17th International Conference on Urban Drainage (ICUD)

Ningbo, Chinaiahr.org

Event site

Recently: 59th ICWMM, Toronto (Feb 2026) · International LID Conference, Jacksonville (Mar 2026) · EWRI Congress, Mobile, AL (Apr 2026), including our special session “The Open SWMM Initiative” · Watershed Management Conference (Aug 2026).

Committee record