SUEWS parameter database

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OHM coefficients — NEW Vegetation [201] (average of codes 20 and 30). evidence record unreferenced

a10.215
a20.325
a3-19.85
ohmunreferenced

Parameters

Names follow the SUEWS YAML specification; click one for its definition in the configuration reference.

a10.215
a20.325
a3-19.85

Provenance evidence

Unresolved

Calculated · assessed by provenance-audit · 2026-08-21. Agent assessment is evidence preparation, not human verification.

Mixed Forest [20] McCaughey (1985)Input record

Supplies code 20 values 0.11, 0.11 and -12.3.

Short grass [30]Input record

Supplies code 30 values 0.32, 0.54 and -27.4.

Assessment findings

Namesupported
Targetsupported
Valuessupported
Sourcenot applicable
Placenot applicable
Representativenessnot applicable
Applicable Scaleunresolved
The internal mean combines mixed-forest and short-grass inputs, but no design artifact states whether the result is a per-class default or a cross-class aggregate. A legacy design artifact or maintainer confirmation is required.
issue #46
Methodsupported
Identitysupported

Derivation

arithmetic_mean · For each of a1, a2 and a3: (code 20 input + code 30 input) / 2. · The component-wise means are 0.215, 0.325 and -19.85, exactly matching the stored triplet.

Scientific note

This is an internally calculated record. It correctly remains unreferenced and identifies both current database inputs instead of manufacturing an external parameter publication.

Model-ready fragment

Paste under ohm_coefficients in a SUEWS YAML configuration; every value carries its citation.

a1:
  value: 0.215
  ref:
    ID: unreferenced
    DOI: null
    desc: null
a2:
  value: 0.325
  ref:
    ID: unreferenced
    DOI: null
    desc: null
a3:
  value: -19.85
  ref:
    ID: unreferenced
    DOI: null
    desc: null

Evidence review

UnresolvedReview procedure

Record metadata

Sourceunreferenced — no citation was recorded in the legacy database; treat with care
Targetohm_coefficients · docs
Schema2026.5 · legacy row 50240005
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