Field notes
Notes from the waterline.
Working notes on computational hydrology and stormwater compliance — the methods, the permits, and the arithmetic underneath the numbers we put in front of reviewers.
Topic
Tags
// Featured · Field Note
HydrologyFor civil engineers, hydrologists, and MS4 practitioners selecting a runoff calculation method
TR-55 vs. the Rational Method: When Each Belongs in Your Stormwater Calc
A side-by-side breakdown of the Rational Method and NRCS TR-55—covering assumptions, size limits, and which tool to reach for on any given project.
InspectionsFor stormwater contractors managing NPDES CGP compliance on active construction sites
Field Inspections That Document Themselves: CV for BMP Deficiency Detection
How a YOLOv8 BMP classifier turns drone footage into audit-ready inspection records—cutting manual traversal time and closing compliance gaps before the next storm event.
MS4 ComplianceFor MS4 Owners
From Acres to Pounds: A Defensible Load-Reduction Chain for MS4 Reporting
Translating acres treated into defensible pollutant load reductions in pounds for MS4 compliance and TMDL reporting