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  2. Please report issues with the manual on the GitHub Issues.

  3. Please cite SUEWS with proper information from our Zenodo page.

2.1.1. Scheme options¶

CBLUse¶
Requirement

Required

Description

Determines whether a CBL slab model is used to calculate temperature and humidity.

Configuration

SnowUse¶
Requirement

Required

Description

Determines whether the snow part of the model runs.

Configuration

Value

Comments

0

Snow calculations are not performed.

1

Snow calculations are performed.
NetRadiationMethod¶
Requirement

Required

Description

Determines method for calculation of radiation fluxes.

Configuration

Value

Comments

0

Uses observed values of Q* supplied in meteorological forcing file.

1

Q* modelled with L↓ observations supplied in meteorological forcing file. Zenith angle not accounted for in albedo calculation.

2

Q* modelled with L↓ modelled using cloud cover fraction supplied in meteorological forcing file (Loridan et al., 2011). Zenith angle not accounted for in albedo calculation.

3

Q* modelled with L↓ modelled using air temperature and relative humidity supplied in meteorological forcing file (Loridan et al., 2011). Zenith angle not accounted for in albedo calculation.

11

Same as 1 but with L↑ modelled using surface temperature Not recommended in this version.

12

Same as 2 but with L↑ modelled using surface temperature Not recommended in this version.

13

Same as 3 but with L↑ modelled using surface temperature Not recommended in this version.

100

Q* modelled with L↓ observations supplied in meteorological forcing file. Zenith angle accounted for in albedo calculation. SSss_YYYY_NARPOut.txt file produced. Not recommended in this version.

200

Q* modelled with L↓ modelled using cloud cover fraction supplied in meteorological forcing file (Loridan et al., 2011). Zenith angle accounted for in albedo calculation. SSss_YYYY_NARPOut.txt file produced. Not recommended in this version.

300

Q* modelled with L↓ modelled using air temperature and relative humidity supplied in meteorological forcing file (Loridan et al., 2011). Zenith angle accounted for in albedo calculation. SSss_YYYY_NARPOut.txt file produced. Not recommended in this version.

1001

Q* modelled with SPARTACUS-Surface (SS) but with L↓ modelled as in 1. Experimental in this version.

1002

Q* modelled with SPARTACUS-Surface (SS) but with L↓ modelled as in 2. Experimental in this version.

1003

Q* modelled with SPARTACUS-Surface (SS) but with L↓ modelled as in 3. Experimental in this version.
BaseTMethod¶
Requirement

Required

Description

Determines method for base temperature used in HDD/CDD calculations.

Configuration

Value

Comments

1

V-shape approach: a single BaseT_HC is used

2

U-shape approach: TCritic_Heating_WD (TCritic_Heating_WE) and TCritic_Cooling_WD (TCritic_Cooling_WE) are used for HDD and CDD calculations in weekdays (weekends), respectively.
EmissionsMethod¶
Requirement

Required

Description

Determines method for QF calculation.

Configuration

Value

Comments

0

Uses values provided in the meteorological forcing file (SSss_YYYY_data_tt.txt). If you do not want to include QF to the calculation of surface energy balance, you should set values in the meteorological forcing file to zero to prevent calculation of QF. UMEP provides two methods to calculate QF LQF which is simpler GQF which is more complete but requires more data inputs

1

Not recommended in this version. Calculated according to Loridan et al. (2011) using coefficients specified in SUEWS_AnthropogenicEmission.txt. Modelled values will be used even if QF is provided in the meteorological forcing file.

2

Recommended in this version. Calculated according to Järvi et al. (2011) using coefficients specified in SUEWS_AnthropogenicEmission.txt and diurnal patterns specified in SUEWS_Profiles.txt. Modelled values will be used even if QF is provided in the meteorological forcing file.

3

Updated Loridan et al. (2011) method using daily (not instantaneous) air temperature (HDD(id-1,3)) using coefficients specified in SUEWS_AnthropogenicEmission.txt.

4

Järvi et al. (2019) method, in addition to anthropogenic heat due to building energy use calculated by Järvi et al. (2011), that due to metabolism and traffic is also calculated using coefficients specified in SUEWS_AnthropogenicEmission.txt and diurnal patterns specified in SUEWS_Profiles.txt. Modelled values will be used even if QF is provided in the meteorological forcing file.
StorageHeatMethod¶
Requirement

Required

Description

Determines method for calculating storage heat flux ΔQS.

Configuration

Value

Comments

0

Uses observed values of ΔQS supplied in meteorological forcing file.

1

ΔQS modelled using the objective hysteresis model (OHM) (Grimmond et al., 1991) using parameters specified for each surface type.

3

ΔQS modelled using AnOHM (Sun et al., 2017). Not recommended in this version.

4

ΔQS modelled using the Element Surface Temperature Method (ESTM) (Offerle et al., 2005). Not recommended in this version.
OHMIncQF¶
Requirement

Required

Description

Determines whether the storage heat flux calculation uses Q* or ( Q* +QF).

Configuration

Value

Comments

0

ΔQS modelled Q* only.

1

ΔQS modelled using Q*+QF.
StabilityMethod¶
Requirement

Required

Description

Defines which atmospheric stability functions are used.

Configuration

Value

Comments

0

Not used.

1

Not used.

2

  • Momentum:

    • unstable: Dyer (1974) modified by Högström (1988)

    • stable: Van Ulden and Holtslag (1985)

  • Heat: Dyer (1974) modified by Högström (1988)

Not recommended in this version.

3

  • Momentum: Campbell and Norman (1998) (Eq 7.27, Pg97)

  • Heat

    • unstable: Campbell and Norman (1998)

    • stable: Campbell and Norman (1998)

Recommended in this version.

4

  • Momentum: Businger et al. (1971) modified by Högström (1988)

  • Heat: Businger et al. (1971) modified by Högström (1988)

Not recommended in this version.
RoughLenHeatMethod¶
Requirement

Required

Description

Determines method for calculating roughness length for heat.

Configuration

Value

Comments

1

Uses value of 0.1*z0m.

2

Calculated according to Kawai et al. (2009).

3

Calculated according to Voogt and Grimmond (2000).

4

Calculated according to Kanda et al. (2007).

5

Adaptively using z0m based on pervious coverage: if fully pervious, use method 1; otherwise, use method 2.

Recommended in this version.
RoughLenMomMethod¶
Requirement

Required

Description

Determines how aerodynamic roughness length (z0m) and zero displacement height (zdm) are calculated.

Configuration

Value

Comments

1

Values specified in SUEWS_SiteSelect.txt are used.

Tip

Note that UMEP provides tools to calculate these. See Kent et al. (2017) for recommendations on methods. Kent et al. (2017) have developed a method to include vegetation which is also avaialble within UMEP.

2

z0m and zd are calculated using ‘rule of thumb’ (Grimmond and Oke, 1999) using mean building and tree height specified in SUEWS_SiteSelect.txt. z0m and zd are adjusted with time to account for seasonal variation in porosity of deciduous trees.

3

z0m and zd are calculated based on the Macdonald et al. (1998) method using mean building and tree heights, plan area fraction and frontal areal index specified in SUEWS_SiteSelect.txt. z0m and zd are adjusted with time to account for seasonal variation in porosity of deciduous trees.
SMDMethod¶
Requirement

Required

Description

Determines method for calculating soil moisture deficit (SMD).

Configuration

Value

Comments

0

SMD modelled using parameters specified in SUEWS_Soil.txt. Recommended in this version.

1

Observed SM provided in the meteorological forcing file is used. Data are provided as volumetric soil moisture content. Metadata must be provided in SUEWS_Soil.txt.

2

Observed SM provided in the meteorological forcing file is used. Data are provided as gravimetric soil moisture content. Metadata must be provided in SUEWS_Soil.txt.
SOLWEIGUse¶

Deprecated since version v2020a.

Requirement

Required

Description

Determines whether SOLWEIG is used to calculate detailed radiation balance of all facets.

Configuration

Value

Comments

0

SOLWEIG calculations are not performed.

1

SOLWEIG calculations are performed. A grid of mean radiant temperature (Tmrt) is calculated based on high resolution digital surface models.
WaterUseMethod¶
Requirement

Required

Description

Defines how external water use is calculated.

Configuration

Value

Comments

0

External water use modelled using parameters specified in SUEWS_Irrigation.txt.

1

Observations of external water use provided in the meteorological forcing file are used.
DiagMethod¶
Requirement

Required

Description

Defines how near surface diagnostics are calculated.

Configuration

Value

Comments

0

Use MOST to calculate near surface diagnostics.

1

Use RST to calculate near surface diagnostics.

1

Use a set of criteria based on plan area index, frontal area index and heights of roughness elements to determine if RSL or MOST should be used.