Note

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

4.3.2. Vegetation parameters

LeavesOutInitially
Requirement

Optional

Description

Flag for initial leave status [1 or 0]

Configuration

If the model run starts in winter when trees are bare, set LeavesOutInitially = 0 and the vegetation parameters will be set accordingly based on the values set in SUEWS_SiteInfo.xlsm. If the model run starts in summer when leaves are fully out, set LeavesOutInitially = 1 and the vegetation parameters will be set accordingly based on the values set in SUEWS_SiteInfo.xlsm. Not LeavesOutInitially can only be set to 0, 1 or -999 (fractional values cannot be used to indicate partial leaf-out). The value of LeavesOutInitially overrides any values provided for the individual vegetation parameters. To prevent LeavesOutInitially from setting the initial conditions, either omit it from the namelist or set to -999. If values are provided individually, they should be consistent the information provided in SUEWS_Veg.txt and the time of year. If values are provided individually, values for all required surfaces must be provided (i.e. specifying only albGrass0 but not albDecTr0 nor albEveTr0 is not permitted).

GDD_1_0
Requirement

Optional

Description

GDD related initial value

Configuration

Cannot be negative. If leaves are already full, then this should be the same as GDDFull in SUEWS_Veg.txt. If winter, set to 0. It is important that the vegetation characteristics are set correctly (i.e. for the start of the run in summer/winter).

GDD_2_0
Requirement

Optional

Description

GDD related initial value

Configuration

Cannot be positive If the leaves are full but in early/mid summer then set to 0. If late summer or autumn , this should be a negative value. If leaves are off , then use the values of SDDFull in SUEWS_Veg.txt to guide your minimum value. It is important that the vegetation characteristics are set correctly (i.e. for the start of the run in summer/winter).

LAIinitialEveTr
Requirement

Optional

Description

Initial LAI for evergreen trees EveTr.

Configuration

The recommended values can be found from SUEWS_Veg.txt

LAIinitialDecTr
Requirement

Optional

Description

Initial LAI for deciduous trees DecTr.

Configuration

The recommended values can be found from SUEWS_Veg.txt

LAIinitialGrass
Requirement

Optional

Description

Initial LAI for irrigated grass Grass.

Configuration

The recommended values can be found from SUEWS_Veg.txt

albEveTr0
Requirement

Optional

Description

Albedo of evergreen surface EveTr on day 0 of run

Configuration

The recommended values can be found from SUEWS_Veg.txt

albDecTr0
Requirement

Optional

Description

Albedo of deciduous surface DecTr on day 0 of run

Configuration

The recommended values can be found from SUEWS_Veg.txt

albGrass0
Requirement

Optional

Description

Albedo of grass surface Grass on day 0 of run

Configuration

The recommended values can be found from SUEWS_Veg.txt

decidCap0
Requirement

Optional

Description

Storage capacity of deciduous surface DecTr on day 0 of run.

Configuration

The recommended values can be found from SUEWS_Veg.txt

porosity0
Requirement

Optional

Description

Porosity of deciduous vegetation on day 0 of run.

Configuration

This varies between 0.2 (leaf-on) and 0.6 (leaf-off). The recommended values can be found from SUEWS_Veg.txt