7.2. Heights that need to be considered in SUEWS¶
A wide number of height needs to be considered before applying SUEWS. The following figure and table help to clarify the differences between these
Name |
Symbol |
Definition |
Comment |
---|---|---|---|
Height of Forcing data for Local scale SUEWS application |
Height above ground level |
This should be above the RSL |
|
Roughness SubLayer |
RSL |
Layer that is directly influenced by individual roughness elements |
includes the UCL but is below the ISL |
Urban canopy layer |
UCL |
Height of the roughness elements (RE) |
Building, trees and other RE |
Inertial sub layer or Constant flux layer |
ISL |
The layer where the influence of the individual RE are blended |
|
Height above ground level |
agl |
height of RE, height of ISL, mid-height of building |
|
Height above sea level |
asl |
Altitude of land surface |
can be different between model grids (e.g. ERA5 grid and SUEWS grids) |
Tip
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