Convert PET to local standards

[M-vanderGulik]

Hello everyone,

I’m hoping someone can help me with a question regarding the UMEP PET calculation in QGIS. We're looking to use UMEP for PET assessments, but before we can apply it in our projects, we need to convert the output to match the Dutch standard formulas for PET.

The Dutch standards we’re working with are as follows:

PETshade,night = −12.14 + 1.25𝑇𝑎 − 1.47 ln(𝑢1.2) + 0.060𝑇𝑤 + 0.015𝑆𝑣f 𝑄𝑑 +0.0060(1 − 𝑆𝑣f )𝜎(𝑇𝑎 + 273.15)^4

PETsun = −13.26 + 1.25𝑇𝑎 + 0.011𝑄gl − 3.37 ln(𝑢1.2) + 0.078𝑇𝑤 +0.0055𝑄𝑔l ln(𝑢1.2) +5.56 sin(𝜑) − 0.0103𝑄𝑔l ln(𝑢1.2) sin(𝜑𝜑) + 0.546𝐵𝑏 + 1.94𝑆𝑣f

Ta= temperature at 2 meters high
u = windspeed at 1.2 m

My main question is: Does the UMEP PET module in QGIS provide the necessary outputs or input variables to apply these formulas, or is additional post-processing required to convert the UMEP results to match the Dutch PET standard?

Any guidance or experience with this kind of conversion would be greatly appreciated!

Best regards,
Mees van der Gulik

[biglimp]

Hi,
Can you please specify all the symbols in your equations more in detail (e.g. Qgl, Tw etc.)

Why dont use the actual PET values that come out from SpatialTC-tool instead?