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Warning

DEPRECATED: This table-based input format is deprecated as of 2025. Please use the modern YAML format instead. See our transition guide for migration help.

SUEWS_Conductance.txt

SUEWS_Conductance.txt contains the parameters needed for the Jarvis (1976) [Jarvis, 1976] surface conductance model used in the modelling of evaporation in SUEWS. These values should not be changed independently of each other. The suggested values below have been derived using datasets for Los Angeles and Vancouver (see Järvi et al. [2011]) and should be used with gsModel = 1. An alternative formulation ( gsModel =2) uses slightly different functional forms and different coefficients (with different units).

No.	Column Name	Use	Description
1	Code	L	Code linking to a corresponding look-up table.
2	G1	MD	Maximum surface conductance parameter. Controls the upper limit of stomatal/surface conductance under optimal conditions [mm s-1]
3	G2	MD	Radiation response parameter. Controls how surface conductance responds to incoming shortwave radiation (Kdown) [W m-2]
4	G3	MD	Vapour pressure deficit (VPD) response parameter 1. Controls conductance sensitivity to atmospheric dryness [units depend on gsModel]
5	G4	MD	Vapour pressure deficit (VPD) response parameter 2. Additional VPD sensitivity parameter for non-linear responses [units depend on gsModel]
6	G5	MD	Temperature response parameter. Controls how surface conductance responds to air temperature changes [°C]
7	G6	MD	Soil moisture response parameter. Controls conductance sensitivity to soil water availability [mm-1]
8	TH	MD	Upper air temperature limit [°C]
9	TL	MD	Lower air temperature limit [°C]
10	S1	MD	A parameter related to soil moisture dependence [-]
11	S2	MD	A parameter related to soil moisture dependence [mm]
12	Kmax	MD	Maximum incoming shortwave radiation [W m-2]
13	gsModel	MD	Formulation choice for conductance calculation.

An example SUEWS_Conductance.txt can be found below:

1    2       3        4      5      6       7      8  9   10   11 12   13
Code G1      G2       G3     G4     G5      G6     TH TL  S1   S2 Kmax gsModel
100  16.4764 566.0923 0.2163 3.3649 11.0764 0.0176 40 0   0.45 15 1200 1       ! Default Jarvi et al. (2011) gsModel=1
200  3.5     200      0.13   0.7    30      0.05   55 -10 5.56 0  1200 2       ! Updated Ward  et al. (2016) gsModel=2
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