SUEWS parameter database

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OHM coefficients — Code 851 x Multiplier for summer [8511] evidence record

a10.722
a20.3
a3-36.14
ohmLand-cover classWard 2016

Parameters

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

a10.722
a20.3
a3-36.14

Provenance evidence

Awaiting sign-off

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

Surface Urban Energy and Water Balance Scheme (SUEWS): Development and evaluation at two UK sitesValidation

Where: Figure 8, seasonal-coefficient and constant-coefficient model results, p. 14

This is application and validation at London and Swindon, not the observation source for the triplet.

Paved surface composite [851]Related record

Supplies the generic paved pre-adjustment code 851 triplet used by Ward's seasonal calculation; its stable path retains the legacy migration identity.

Assessment findings

Namesupported
The values, Summer label and corrected final code token consistently identify code 8511.
Targetsupported
Ward et al. define these three values as coefficients in the OHM storage-heat equation.
Valuessupported
The exact code 8511 triplet 0.722, 0.300, -36.14 matches the stored values.
Sourcesupported
Ward et al. state the seasonal scaling and the companion v2016a table publishes the exact result.
Placenot applicable
Representativenessnot applicable
Applicable Scalesupported
Equation 6 weights the coefficients for each surface type by its surface cover fraction, and Table 4 lists this input as Paved, so the tuple describes the paved land-cover class before neighborhood aggregation.
Methodsupported
The database adopts Ward's published output; Ward's authors produced it by scaling the compiled paved code rather than by a new observation or regression.
Identitysupported
The stored triplet and Summer season label uniquely identify code 8511 despite the name typo.

Scientific note

Ward et al. compile code 851 from concrete and asphalt literature rows, then calculate seasonal a1 and a3 values using Anandakumar-derived multipliers. Their London and Swindon runs validate/apply the coefficients but are not their observation input. The final name token is now corrected to 8511 while the stable record path remains unchanged.

Model-ready fragment

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

a1:
  value: 0.722
  ref:
    ID: ward2016
    DOI: 10.1016/j.uclim.2016.05.001
    desc: land_cover
a2:
  value: 0.3
  ref:
    ID: ward2016
    DOI: 10.1016/j.uclim.2016.05.001
    desc: land_cover
a3:
  value: -36.14
  ref:
    ID: ward2016
    DOI: 10.1016/j.uclim.2016.05.001
    desc: land_cover

Evidence review

Awaiting sign-offSign off evidence on GitHub

Raises a prefilled sign-off issue. CI accepts it only when the issue author is in the verifier registry and the evidence revision is still current.

Review procedure

Record metadata

Applicable scaleLand-cover class
Targetohm_coefficients · docs
SeasonSummer
Schema2026.5 · legacy row 50240027

Used by 2 typologies

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