Fixing EPA SWMM 5.2.4, One Proven Defect at a Time
The rounded-bottom bug, how far it reaches, and a fixed 5.2.4 built from the HydroCouple code review
Prepared for Robert (Bob) Dickinson · October 19, 2026
In October 2026 Caleb Buahin set an AI agent on EPA SWMM 5.2.4 and … Read the rest
SWMM ENABLEMENT · TOOLING NOTE
Claude Chat Archive
How the single-file searchable archive of three years of conversations is built and how it works
Robert Dickinson · Build of 14 October 2026 · Document written 18 October 2026
The archive is one HTML file. Open it with a double-click, with … Read the rest
SWMM PDF WIZARD
How It Works
From a SWMM5 or SWMM6 model set to a finished PDF report: the file readers, the report layout, the pdfcraft engine in the browser, and the bridge your other apps use.
App version SWMM PDF Wizard 1.0.0
PDF engine pdfcraft-cli 0.8.0 (commit 9e5b70d, 16 … Read the rest
The Water Decides
Told in the manner of Isaac Asimov’s science essays
Robert (Bob) Dickinson · SWMM Enablement
App version 1.1 · 17 October 2026
Engines: EPA SWMM 5.2.4 and OpenSWMM 6.0.0-alpha.4 (swmm6_rel 64d517f), both compiled to WebAssembly
Units: US customary (ft, s, cfs)
This is an app i made from a optimizer i saw on X called Nesterov gradient optimizer. I has a SWMM5 and SWMM6 engine, is connected to thousands of SWMM models and allows you to calibrate the model. Calibration is key for modeling as models have a lot of parameters.Two
EPANET Total Head Explorer
A Detailed Summary of the Interactive Educational Tool
https://epanet-total-head-explorer.netlify.app/
The EPANET Total Head Explorer is an interactive, browser-based educational tool designed to demystify how EPANET (the industry-standard water distribution modeling software from the U.S. EPA) calculates total head at every node in a water network. Built … Read the rest
A Harvard study warned that AI intensifies work. Here’s what that looks like when the work is stormwater modeling and the worker has half a century of hydraulic knowledge to unleash.
Updated July 2026.
The InfoSewer to ICM InfoWorks — Network Import Process app is an interactive, browser-based guide that documents a Ruby automation for migrating InfoSewer collection-system models (stored as .IEDB folders of DBF files) into Innovyze InfoWorks ICM. It walks an engineer through the full 10-step … Read the rest
I’ve been exploring an unusual intersection: hyperbolic geometry and hydrological modeling. The result is a web-based tool that generates subcatchment tessellations for EPA SWMM5 using Möbius transformations on the Poincaré disc. It looks visually interesting, the exported work as test models … Read the rest
The problem with using 50 year old simple models or even test models that started out as real models as we did in the SWMM5 redevelopment project are they are too nice for the most (with exceptions). This app uses strange attractors to make complex visually interesting models that look … Read the rest
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
December 14, 2025
There is quite … Read the rest
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
December 6, 2025
This is an app that I always wanted to make … Read the rest
](https://www.linkedin.com/in/robertdickinson/)
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
December 6, 2025
This is a simple yet … Read the rest
](https://www.linkedin.com/in/robertdickinson/)
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
December 2, 2025
You may have been seeing … Read the rest
](https://www.linkedin.com/in/robertdickinson/)
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
November 30, … Read the rest
](https://www.linkedin.com/in/robertdickinson/)
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
August 24, 2025
What is this, you may ask? It … Read the rest
](https://www.linkedin.com/in/robertdickinson/)
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
August 8, 2025
Introduction
As … Read the rest
](https://www.linkedin.com/in/robertdickinson/)
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
July 29, 2025
Are you … Read the rest
](https://www.linkedin.com/in/robertdickinson/)
Helping across the full stormwater spectrum: SWMM (50+ yrs), InfoSWMM/ESRI (20 yrs), InfoWorks ICM (15 yrs), & Autodesk AEC Collection (5 yrs) Grandpa (10 yrs)
July 28, 2025
Are you a … Read the rest
