Diffuse radiation formula (Heat Overlay): Difference between revisions

From Tygron Support wiki
Jump to navigation Jump to search
(Created page with "The diffuse radiation is an input parameter for the PET-formula The diffuse radation Q<sub>d</sub> at time t is calculated using the following formula: Q<sub>d,t</sub> =...")
 
Line 22: Line 22:
|0.2
|0.2
| τ<sub>a</sub>>=0.7  
| τ<sub>a</sub>>=0.7  
|[[File:Overlay_flooding.png]]
|[[Flooding_(Overlay)|Flooding Overlay]]
|provides insight into water stress and impact caused by breaches in levees or other sources causing excessive water inflow
|-
|-

Revision as of 14:49, 11 September 2019

The diffuse radiation is an input parameter for the PET-formula

The diffuse radation Qd at time t is calculated using the following formula:

Qd,t = Qgl,t * ftransmission,t
where,

  • Qgl,t is the amount of sun radiation at time t, measured at a weather station.
  • ftransmission,t is the Atmospheric transmission factor at time t.

Atmospheric transmission factor

The atmospheric transmission factor is calculated as followed:

Factor Condition
1 τa <= 0.3
1.6-2* τa 0.3 < τa < 0.7
0.2 τa>=0.7
Retrieved from "https://support.tygron.com/w/index.php?title=Diffuse_radiation_formula_(Heat_Overlay)&oldid=27143"