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Quick Start

Type any SWMM topic in the search bar above — results appear instantly. Use commas for AND logic (e.g. infiltration, groundwater). Click an example chip below to try it out.

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Table of Contents
Browse all chapters and sections
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INP Reference
SWMM input file sections with ICM equivalents
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Glossary
Key terms and definitions from the manual
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ICM Mapping
SWMM5 ↔ ICM Ruby variable cross-reference
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Version History
SWMM5 changes from v5.0 to v5.2 (EPA)
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Interactive Diagrams
31 diagrams: Subcatchment, Horton, conduit cross-sections, HGL/EGL
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Parameter Calculators
Manning, Rational, Green-Ampt, CN, RTK, Orifice, Weir, Normal & Critical Depth
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Learning Paths
Guided tracks for Beginner, Practicing Engineer, and Advanced users
Try: Manning roughness conduits INP infiltration INP pump curve LID controls INP dynamic wave routing
Results:
Loading table of contents…
Loading INP reference…
Loading ICM variable mapping…
Loading version history…
Loading glossary…

Interactive SWMM5 Diagrams

Visual references for key SWMM5 concepts. Hover over parts of a schematic for details, or drag sliders to see equations update live.

Parameter Calculator Suite

Live calculators for the most common SWMM5 equations. Adjust inputs — outputs and unit hints update instantly. Tap any 📖 chip to open the relevant manual section.

Learning Paths

Pick a path that matches where you are. Each step links to the relevant manual section or interactive diagram. Your progress is saved locally.

SWMM Assistant Chat — Feature Overview

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AI-Powered Q&A

  • Uses Claude (Anthropic) via Replit AI
  • Specialized in SWMM 5.2 modeling, INP files
  • RAG: Searches 621-section Manual for context
  • Streaming responses (word-by-word)
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Chat Management

  • Copy to Clipboard
  • AI remembers session history
  • Clear/reset chat anytime
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Multi-Language Support (19 Languages)

  • Auto-detects language
  • Technical terms stay in English
  • EN, ES, ZH, DE, FR, HE, JA, KO, AR, HI, MI, TA, TN, VI, TL, ZA, YI, TL, TK, FA, RU, PT
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Conversation Memory

  • AI remembers session context
  • In-browser history
  • Mobile responsive (full-screen on mobile)
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Suggestion Chips

  • Pre-built topic suggestions
  • "What is SWMM?", "Junction setup", "Routing methods"
  • Reappear when chat is cleared
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Design & Responsiveness

  • Water-themed CSS (dark/light modes)
  • Smooth transitions
  • High z-index overlay panel
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Markdown Rendering

  • Bold text, inline code
  • Numbered and bulleted lists
  • Paragraph breaks
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Technical Details

  • Backend: POST /chat
  • Whoosh full-text index for RAG
  • Claude claude-haiku-4-5
  • No API key needed (Replit credits)
SWMM Assistant Chat Feature Overview

Source Manual: Table of Contents (TOC) Structure

The SWMM Manual Collection consists of 5 separate manuals. This app crawls all 5 and unifies them into a single searchable index of 53 chapters and 621 sections (248K+ words).

Source Manual TOC Structure — 5 SWMM manuals mapped to 53 chapters
Source Manual App Chapters
Users Manual Chapters 1–12, Appendices A–E, Glossary, Intro
Ref Vol I — Hydrology Ch1-Overview, Ch2-Meteorology, Ch3-SurfaceRunoff, Ch4-Infiltration, Ch5-Groundwater, Ch6-Snowmelt, Ch7-RDII
Ref Vol II — Hydraulics Ch1-PreissmannSlot, Ch2-HydraulicModel, Ch3-DynamicWave, Ch4-KinematicWave, Ch5-CrossSection, Ch6-PumpsRegulators, Ch7-AdvancedFeatures
Ref Vol II Addendum Ch2-StreetCrossSections, Ch3-StorageUnitGeometry, Ch4-Pumps, Ch5-StormDrainInlets
Ref Vol III — Water Quality/LID Ch2-UrbanRunoffQuality, Ch3-PollutantBuildup, Ch4-SurfaceWashoff, Ch5-TransportAndTreatment, Ch6-LowImpactDevelopmentControls
Loading source files…
Data source: Scott Jeffers' SWMM Manual Collection

Live screenshot captured from swmm-manual.netlify.app

Live screenshot of SWMM Manual website