Traffic NO2 Overlay: Difference between revisions
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===Traffic NO2 air polution overlay colors=== | ===Traffic NO2 air polution overlay colors=== | ||
[[File:Traffic_NO2-Overlay_Legend.jpg|thumb|500px|right|Traffic NO2 overlay colors]] | [[File:Traffic_NO2-Overlay_Legend.jpg|thumb|500px|right|Traffic NO2 overlay colors]] | ||
== | ==Calculations== | ||
The calculations follow the standard rekenmethode 1 (SRM 1), as described on [http://wetten.overheid.nl/BWBR0022817/2013-03-22]: | |||
The | |||
= | Cjm = Ca,jm + Cb,jm | ||
where: | |||
* Cjm = yearly average concentration [μg/m3] | |||
* Ca,jm = yearly average background-concentration (default = 0 [μg/m3], can be adjusted via the overlay attributes) | |||
* Cb,jm = yearly average traffic contribution to NO2 concentration [μg/m3] | |||
Cb,jm = Fk * E * θ * Fb * Fmeteo | |||
where: | |||
* Fk = calibration factor [-] (default = 0.62) | |||
* E = Emission number, depending on traffic [μg/m/s] | |||
* θ = Delution factor [-] (default = XXX) | |||
* Fb = Treefactor [-] | |||
* Fmeteo = 5/windspeed. Default windspeed is 5 m/s | |||
==References== | ==References== | ||
The overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government: [http://wetten.overheid.nl/BWBR0022817/2013-01-01#Bijlage1 wetten.overheid.nl] | The overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government: [http://wetten.overheid.nl/BWBR0022817/2013-01-01#Bijlage1 wetten.overheid.nl] |
Revision as of 12:03, 13 June 2018
What is the Traffic NO2 overlay?
The Traffic NO2 overlay is an Overlay which displays the impact of traffic air polution (in μg/m³ nitrogen dioxide) in different colors for the project area. These colors indicate traffic air polution of a location based on traffic flow and distance.
Traffic NO2 air polution overlay colors
Calculations
The calculations follow the standard rekenmethode 1 (SRM 1), as described on [1]:
Cjm = Ca,jm + Cb,jm
where:
- Cjm = yearly average concentration [μg/m3]
- Ca,jm = yearly average background-concentration (default = 0 [μg/m3], can be adjusted via the overlay attributes)
- Cb,jm = yearly average traffic contribution to NO2 concentration [μg/m3]
Cb,jm = Fk * E * θ * Fb * Fmeteo
where:
- Fk = calibration factor [-] (default = 0.62)
- E = Emission number, depending on traffic [μg/m/s]
- θ = Delution factor [-] (default = XXX)
- Fb = Treefactor [-]
- Fmeteo = 5/windspeed. Default windspeed is 5 m/s
References
The overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government: wetten.overheid.nl