SUEWS parameter database

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Evergreen trees · drainage — EvergreenTreeevetr evidence record

storage_drain_params.drain_eq3
storage_drain_params.drain_coef_10.013
storage_drain_params.drain_coef_21.71
wet_threshold1.3
drainageevetrgenericgenericLand-cover classJärvi 2011

Parameters

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

storage_drain_params.drain_eq3
storage_drain_params.drain_coef_10.013
storage_drain_params.drain_coef_21.71
wet_threshold1.3

Provenance evidence

Awaiting sign-off

Published value · assessed by provenance-audit · 2026-08-24. Agent assessment is evidence preparation, not human verification.

Plant parameter values for models in Temperate climatesParameter source

Where: Table 7, coniferous forest interception capacity, p. 286

Reports Ic = 1.3 mm as the median of 74 coniferous-forest values in the temperate literature review; this is the original summary underlying Si, not a London or Havu measurement.

Gamma Ray Attenuation Studies of Interception From Sitka Spruce: Some Evidence for an Additional Transport MechanismParameter source

Where: Accepted manuscript Appendix 1, abstract and Eqs. 9 and 13

Fits the modified Rutter function D = 0.013(exp(1.71 C) - 1) mm h-1 to canopy-storage measurements at Sitka-spruce sites in Wales and Scotland; this is the original source of both drainage coefficients.

An evapotranspiration-interception model for urban areasLater compilation

Where: Section 3.6, Drainage, p. 1744

Defines the exponential vegetation drainage equation and says its coefficients are taken from Calder and Wright; the reference year is printed as 1985 although the registered paper was published in 1986.

Where: Table 2, Coniferous column, p. 1745

Adopts D0 = 0.013 and b = 1.71 for coniferous vegetation in the Vancouver 1987 base run.

The Surface Urban Energy and Water Balance Scheme (SUEWS): Evaluation in Los Angeles and Vancouver.Parameter source

Where: Table 2(a), Coniferous Trees column, p. 223

Compiles the complete stored tuple Si = 1.3 mm, D0 = 0.013 and b = 1.71. Its footnotes correctly point Si to Breuer and D0 to Grimmond and Oke (1991), but the b-row footnote to Grimmond et al. (1986) is contradicted by that paper's full text; Calder and Wright fitted b together with D0.

Where: Equation 18, unirrigated vegetation drainage, p. 224

Defines the exponential drainage form used by the stored equation selector and states that maximum rates and coefficients come from the literature.

CO2 uptake of urban vegetation in a warming Nordic cityLater compilation

Where: Input_rcp.zip/Input_rcp/SUEWS_Veg.txt, rows 841–844

The Helsinki forest, street and two park evergreen rows each carry WetThreshold 1.3, DrainageEq 3, DrainageCoef1 0.013 and DrainageCoef2 1.71, demonstrating later Helsinki application rather than original parameter derivation.

Assessment findings

Namesupported
EvergreenTree identifies the coniferous-tree SUEWS surface class without presenting later application cities as parameter origins.
Targetsupported
The storage summary is for coniferous forest, the fitted drainage function is for Sitka spruce, and the later SUEWS publications assign the tuple to the coniferous-tree surface class, matching land_cover.evetr.
Valuessupported
Breuer et al. report 1.3 mm as the median of 74 coniferous-forest interception capacities. Calder and Wright fit D = 0.013(exp(1.71 C) - 1) to Sitka-spruce canopy measurements. Grimmond and Oke adopt D0 0.013 and b 1.71 for coniferous vegetation, Järvi et al. assemble the exact stored tuple, and Havu's archived evergreen rows reproduce it unchanged.
Sourcesupported
Järvi et al. are the immediate publication of the complete SUEWS tuple carried by the record's single source field. The evidence list preserves the separate original storage summary and drainage fit, the urban-model adoption, and Havu's later application. Järvi's footnote attributing b to Grimmond et al. (1986) is not supported by that full text; Calder and Wright are the fitted-coefficient source.
Placesupported
The active tuple is a literature default assembled for a surface class rather than a London, Helsinki, Zurich or Beijing determination, so generic is the supported evidence place. Origin London preserves the migrated row's lineage.
issue #229
Representativenesssupported
Generic reach describes a compiled literature default reused across cities, not a city-wide determination. The sidecar retains that the drainage coefficients ultimately came from a fitted Sitka-spruce study rather than treating Järvi or Havu as new measurements.
issue #229
Applicable Scalesupported
Järvi et al. assign the tuple to the coniferous-tree surface type, establishing land-cover-class scale rather than neighborhood, facet or material scale.
Methodsupported
Literature accurately describes adoption of previously published storage and drainage values; this record performs no new fit.
Identitysupported
The stable path, origin, target, source, legacy ID and all four values preserve the migrated record identity while the active name and scope now describe the evidence rather than later applications.

Scientific note

The active record is a generic coniferous-tree literature tuple: Breuer et al. provide the 1.3 mm median storage capacity, Calder and Wright originally fit D0 = 0.013 and b = 1.71 to Sitka-spruce canopy data, Grimmond and Oke adopt those coefficients into the urban model, Järvi et al. compile the complete SUEWS tuple, and Havu's archive later applies it in Helsinki configurations. Järvi's b-row footnote to Grimmond et al. (1986) is not supported by that paper. The stable path and origin retain migration lineage; no value, source key, target or legacy identity changed.

Model-ready fragment

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

storage_drain_params:
  drain_eq:
    value: 3
    ref:
      ID: jarvi2011
      DOI: 10.1016/j.jhydrol.2011.10.001
      desc: generic, generic, land_cover
  drain_coef_1:
    value: 0.013
    ref:
      ID: jarvi2011
      DOI: 10.1016/j.jhydrol.2011.10.001
      desc: generic, generic, land_cover
  drain_coef_2:
    value: 1.71
    ref:
      ID: jarvi2011
      DOI: 10.1016/j.jhydrol.2011.10.001
      desc: generic, generic, land_cover
wet_threshold:
  value: 1.3
  ref:
    ID: jarvi2011
    DOI: 10.1016/j.jhydrol.2011.10.001
    desc: generic, generic, 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

Placegeneric
Scopegeneric
Applicable scaleLand-cover class
Targetland_cover.evetr · docs
Origin“London” (verbatim legacy string)
Schema2026.5 · legacy row 45240061

Same study, same place

+18 more
all 27 sets from jarvi2011 at generic →
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