U.S. Stormwater Practice Synthesis
A research synthesis of common U.S. post-construction stormwater criteria from this atlas — not a design manual, and not adopted regulation or local code.
18 chapters · 18 editorially reviewed · 11 practice criteria · 8/11/2026
▸How this draft was built
Manuals in this atlas are ingested into a searchable corpus; outline and chapter drafts are written from Tier A anchors and atlas field statistics. Progress below is snapshotted at site build time.
1.Prepare
Queue each jurisdiction PDF and normalize job metadata.
2.Corpus
Extract full text into pages, structure, chunks, and topic tags — the evidence base for the national draft.
3.Extract
Fill the atlas JSON fields (design storms, WQv, BMPs, etc.) with cited excerpts.
4.Verify
Cross-check extracted fields against corpus chunks.
5.Outline
Synthesize a research outline of chapters from tagged corpus coverage.
6.Draft
Write practice survey + recommendation prose for each outline section, with citations.
Current pipeline status
363 jobs · updated 8/14/2026, 3:32:48 PM
Verify bars: green = excerpts found in corpus, red = citation mismatches. Tier A is the ~76-manual evidence core for national citations. See data/pipeline/VERIFY.md for the field histogram.
Outline: Done
Draft sections: 18/18 done
Editorial review: 18/18 reviewed
Practice Criteria (SCMs / BMPs)
National baseline and regional modifiers for bioretention, permeable pavement, swales, wet ponds, and related controls — cross-state criteria matrices from atlas parameters.
practices
Purpose, Scope, and How to Use This Synthesis
Reviewed14 citations56% taggedFrames this work as a synthesis of U.S. practice for research and committee review, not adopted regulation or a design manual.
intro
Applicability and Relationship to Permits and Local Codes
Reviewed14 citations39% taggedWhen criteria apply (new development, redevelopment, thresholds) and how state/local manuals interact.
applicability
Hydrology and Design Storms
Reviewed14 citations49% taggedReturn periods and storm definitions used for water quality, channel protection, and flood control.
hydrology
Design Storm Selection by Purpose
Reviewed14 citations49% taggedSeparate WQ, channel, detention, and flood storms; avoid collapsing all purposes into one number.
hydrology.design-storms
Runoff and Peak-Flow Calculation Methods
Reviewed14 citations46% taggedRational Method, NRCS/TR-55, continuous simulation, and when each is required or allowed.
hydrology.methods
Approved Hydrologic and Hydraulic Software
Reviewed14 citations32% taggedTools commonly required or accepted for sizing and flood routing.
hydrology.software
Water Quality Volume and Treatment
Reviewed14 citations48% taggedSizing basis for water-quality capture/treatment and pollutant-removal expectations.
water-quality
WQv / Treatment Volume Sizing Methods
Reviewed14 citations48% taggedCommon approaches: first inch, 90th percentile, percent annual rainfall, TSS removal targets.
water-quality.sizing
Channel Protection, Detention, and Flood Control
Reviewed14 citations46% taggedPost-development peak matching, extended detention, and floodplain/channel criteria.
channel-flood
Allowable Discharge and Release Rates
Reviewed14 citations46% taggedPre- vs post-development peaks and site-specific release limits.
channel-flood.release
Stormwater Control Measures (BMPs)
Reviewed12 citations48% taggedApproved practice categories, selection hierarchy, and sizing/design criteria.
bmps
BMP Selection and Treatment Trains
Reviewed14 citations48% taggedHow manuals prioritize infiltration, filtration, and proprietary devices.
bmps.selection
Facility Sizing and Design Criteria
Reviewed14 citations50% taggedGeometry, media, drawdown, setbacks, and underdrain requirements by practice type.
bmps.sizing
Manufactured / Proprietary Treatment Devices
Reviewed14 citations48% taggedApproval lists, verification programs, and when MTDs may substitute for GI.
bmps.manufactured
Construction Stormwater and ESC
Reviewed14 citations55% taggedTemporary controls during construction; often in separate manuals from post-construction.
construction-esc
Inspection, Operations, and Maintenance
Reviewed14 citations50% taggedLong-term O&M obligations, inspection frequency, and enforcement hooks.
om
Regional and Site Constraints
Reviewed14 citations49% taggedWhere national defaults must fork: climate, soils, geology, and receiving-water sensitivity.
regional
Plan Submittal, Review, and Variances
Reviewed14 citations25% taggedDocumentation expected for approval and paths for alternatives.
submittals