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3.3.2. 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, setLeavesOutInitially= 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 ofLeavesOutInitiallyoverrides any values provided for the individual vegetation parameters. To preventLeavesOutInitiallyfrom 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 onlyalbGrass0but notalbDecTr0noralbEveTr0is 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
GDDFullin 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
SDDFullin 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
EveTron day 0 of run- Configuration
The recommended values can be found from SUEWS_Veg.txt
- albDecTr0#
- Requirement
Optional
- Description
Albedo of deciduous surface
DecTron day 0 of run- Configuration
The recommended values can be found from SUEWS_Veg.txt
- albGrass0#
- Requirement
Optional
- Description
Albedo of grass surface
Grasson day 0 of run- Configuration
The recommended values can be found from SUEWS_Veg.txt
- decidCap0#
- Requirement
Optional
- Description
Storage capacity of deciduous surface
DecTron 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