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Water · surfaceswater composite

Surface bundleswaterswindoncity

Composition

This composite is assembled from the entries below. Each evidence record keeps its own scientific review; a separate composition review assesses why these components were selected and how they are mapped.

albedoWater generic Awaiting sign-off
alb 0.1
emissivityWater generic Awaiting sign-off
emis 0.95
water_storageWater swindon Awaiting sign-off
storage_drain_params.store_min 0.5 · storage_drain_params.store_max 0.5
water_stateSwindon, UK (not used) swindon Awaiting sign-off
state_limit 1000
drainageWater swindon Awaiting sign-off
wet_threshold 0.5
ohm · summer_wetCode 60 x Multiplier for summer [601] Awaiting sign-off
a1 0.534 · a2 0.21 · a3 -33.31
ohm · summer_dryCode 60 x Multiplier for summer [601] Awaiting sign-off
a1 0.534 · a2 0.21 · a3 -33.31
ohm · winter_wetCode 60 x Multiplier for winter [602] Awaiting sign-off
a1 0.627 · a2 0.21 · a3 13.05
ohm · winter_dryCode 60 x Multiplier for winter [602] Awaiting sign-off
a1 0.627 · a2 0.21 · a3 13.05

Composition provenance

Awaiting sign-off

Assembled · assessed by provenance-audit · 2026-08-23. Agent assessment is composition review preparation, not human verification.

WaterSelected component

Fills the albedo slot. The record declares target land_cover.water, name Water, place generic, representativeness generic, source jarvi2011, method literature and applicable_scale land_cover, and carries alb.

WaterSelected component

Fills the emissivity slot. The record declares target land_cover.water, name Water, place generic, representativeness generic, source jarvi2011 and method literature, and carries emis.

WaterSelected component

Fills the water_storage slot. The record declares target land_cover.water, name Water, place se-england, representativeness regional and source ward2018, and carries store_min and store_max under storage_drain_params.

Swindon, UK (not used)Selected component

Fills the water_state slot. The record declares target land_cover.water, name 'Swindon, UK (not used)', place swindon, representativeness city, source unreferenced and method assumed, and carries state_limit.

WaterSelected component

Fills the drainage slot. The record declares target land_cover.water, name Water, place se-england, representativeness regional and source ward2018, and carries wet_threshold alone; it holds DrainageEq, DrainageCoef1 and DrainageCoef2 in its legacy block as -999, so the slot delivers a wetness threshold and no drainage equation.

Code 60 x Multiplier for summer [601]Selected component

Fills the ohm summer_wet and summer_dry positions. The record declares target ohm_coefficients, name 'Code 60 x Multiplier for summer [601]', season_label Summer and source ward2016, carries a1, a2 and a3, and declares no place and no representativeness.

Code 60 x Multiplier for winter [602]Selected component

Fills the ohm winter_wet and winter_dry positions. The record declares target ohm_coefficients, name 'Code 60 x Multiplier for winter [602]', season_label Winter and source ward2016, carries a1, a2 and a3, and declares no place and no representativeness.

Assessment findings

Composite identitysupported
The composite's name reads Water, its place reads swindon and its origin reads 'Swindon, UK'. Read with those fields the label identifies a Swindon water surface, which is what the entry assembles. The label on its own does not distinguish it from archetypes/surfaces/water/london--water, whose name is also Water; the place field and the entry path carry that distinction.
Composite targetsupported
The composite declares target land_cover.water. The albedo, emissivity, water_storage, water_state and drainage slots each take a record declaring target land_cover.water, and the four ohm positions take records declaring target ohm_coefficients, which is the entry type that slot exists for. Surface records carry no attaches_to field, since attaches_to appears in this database only on the profile records under records/profiles/, so the slot check rests on the parameters each component carries: alb into albedo, emis into emissivity, store_min and store_max into water_storage, state_limit into water_state, wet_threshold into drainage, and a1, a2 and a3 into each ohm position. The drainage component carries wet_threshold alone and keeps DrainageEq, DrainageCoef1 and DrainageCoef2 in legacy as -999, so the slot supplies no drainage equation, which is what that record declares rather than a mapping error. The two OHM components carry season_label: records/ohm/generic--ward2016--water declares Summer and fills summer_wet and summer_dry, and records/ohm/generic--ward2016--water--code-60-x-multiplier-for-winter-602 declares Winter and fills winter_wet and winter_dry, so the season mapping follows each record's own label. Neither carries a wetness label, so a season's wet and dry positions taking the same record asserts nothing the records deny.
Own parameter valuesnot applicable
The composite declares no parameters of its own, so it overrides no component value; every number in its exported fragment arrives from a component.
Composition rationalenot applicable
The composite declares no source field and the repository records no published rationale for this selection. Each component's own source belongs to that component's evidence assessment, not to this review.
Place applicabilitysupported
The composite declares place swindon. The water_state slot takes records/surfaces/water/swindon--ward2016--water-state, place swindon, so the one slot that is genuinely site-specific carries the town's own row. The water_storage and drainage slots take records with place se-england, which db/places.yml records as 'SE England', subnational: true, country united-kingdom, the region containing Swindon, so applying them to the town is a downscaling rather than a substitution. The albedo and emissivity slots take generic records, and the two OHM records declare no place.
Representativenesssupported
The composite declares representativeness city. records/surfaces/water/swindon--ward2016--water-state declares city, matching it exactly. The two se-england components declare regional and the albedo and emissivity records declare generic, each broader than the composite and therefore downscaled rather than over-claimed; the two OHM records declare no representativeness. No component is classed below the composite's scale.
Slot and season mappingsupported
An assembly of seven existing records into nine slot positions; the composite produces no value of its own.
Completeness and uniquenesssupported
The composite fills all six slots the land_cover.water archetypes use, albedo, emissivity, water_storage, water_state, drainage and ohm; neither water archetype declares a construction or a snow_lim_patch slot, so the assembly is complete on that pattern. It is the only Swindon water typology in the database. It shares six of its seven components with archetypes/surfaces/water/london--water and differs in the water_state slot, which takes records/surfaces/water/swindon--ward2016--water-state here and records/surfaces/water/london--ward2016--water-state there, so the two are distinct entries rather than duplicates.

Scientific note

Every check this review can make comes out clean. archetypes/surfaces/water/swindon-uk--water declares place swindon and representativeness city; its water_state component declares exactly that place and that class. Its albedo and emissivity come from generic jarvi2011 literature records, while water storage and drainage come from ward2018 se-england rows; the regional and generic rows cover Swindon and are applied down to the town. The season mapping follows the components' own season_label fields, the drainage slot supplies wet_threshold and no drainage equation because the component holds the drainage coefficients in legacy as -999, and every slot takes a record declaring the target that slot fills. One thing a reader should carry forward without acting on it here: records/surfaces/water/swindon--ward2016--water-state is named 'Swindon, UK (not used)', so the state_limit this entry publishes comes from a row the migration marked as unused in the study it cites. Whether such a value belongs in the database at all is a question for that record's own evidence review. As a selection it is beyond argument, because it is the only Swindon water-state record there is and it agrees with the composite on place and class.

Model-ready fragment

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

alb:
  value: 0.1
  ref:
    ID: jarvi2011
    DOI: 10.1016/j.jhydrol.2011.10.001
    desc: generic, generic, land_cover
emis:
  value: 0.95
  ref:
    ID: jarvi2011
    DOI: 10.1016/j.jhydrol.2011.10.001
    desc: generic, generic
storage_drain_params:
  store_min:
    value: 0.5
    ref:
      ID: ward2018
      DOI: 10.1002/joc.5200
      desc: swindon, site
  store_max:
    value: 0.5
    ref:
      ID: ward2018
      DOI: 10.1002/joc.5200
      desc: swindon, site
state_limit:
  value: 1000
  ref:
    ID: unreferenced
    DOI: null
    desc: swindon, city
wet_threshold:
  value: 0.5
  ref:
    ID: ward2018
    DOI: 10.1002/joc.5200
    desc: swindon, site
ohm_coef:
  summer_wet:
    a1:
      value: 0.534
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
    a2:
      value: 0.21
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
    a3:
      value: -33.31
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
  summer_dry:
    a1:
      value: 0.534
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
    a2:
      value: 0.21
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
    a3:
      value: -33.31
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
  winter_wet:
    a1:
      value: 0.627
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
    a2:
      value: 0.21
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
    a3:
      value: 13.05
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
  winter_dry:
    a1:
      value: 0.627
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
    a2:
      value: 0.21
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover
    a3:
      value: 13.05
      ref:
        ID: ward2016
        DOI: 10.1016/j.uclim.2016.05.001
        desc: land_cover

Composition review

Awaiting sign-offSign off composition 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

Composite metadata

Placeswindon
Scopecity
Targetland_cover.water · docs
Origin“Swindon, UK” (verbatim legacy string)
Schema2026.5 · legacy row 25240003
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