Traffic NO2 Overlay: Difference between revisions
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==Calculation== | ==Calculation== | ||
{{main|Traffic NO2 formula (Traffic NO2 Overlay)}} | {{main|Traffic NO2 formula (Traffic NO2 Overlay)}} | ||
The Traffic NO2 Overlay performs its calculations based on the [[Model attributes (Traffic NO2 Overlay)|Overlay's Attributes]], and the [[Construction attributes (Traffic Overlay)|Attributes of roads]] present in the [[3D World]]. | The Traffic NO2 Overlay performs its calculations based on the [[Model attributes (Traffic NO2 Overlay)|Overlay's Attributes]], the presence of [[Construction|trees]], and the [[Construction attributes (Traffic Overlay)|Attributes of roads]] present in the [[3D World]]. The calculations follow the standard rekenmethode 1 (SRM 1), as described on [http://wetten.overheid.nl/BWBR0022817/2013-03-22]. | ||
==Results== | ==Results== | ||
Revision as of 12:12, 11 February 2022
The Traffic NO2 Overlay is a Grid Overlay which computes the impact of traffic air pollution (in μg/m³ NO2) for any given location in the 3D World. The calculation takes into account the amounts- and types of traffic, and the distance from the source of emission.
The Overlay only takes into account NO2 emissions from traffic. Other sources of emissions (such as air traffic of factories) are explicitly excluded.
Configuration
- Main article: Model attributes (Traffic NO2 Overlay)
The Traffic NO2 Overlay has a number of options which allow it to be configured as desired. A configuration wizard is available.
The following aspects can be configured:
- Emissions per vehicle type both in motion and in traffic jam
- Constants for road-based dilution factors
Calculation
- Main article: Traffic NO2 formula (Traffic NO2 Overlay)
The Traffic NO2 Overlay performs its calculations based on the Overlay's Attributes, the presence of trees, and the Attributes of roads present in the 3D World. The calculations follow the standard rekenmethode 1 (SRM 1), as described on [1].
Results
The following result types are available as output from the traffic NO2 calculations:
| Icon | Result type | Unit | Mode | Description |
|---|---|---|---|---|
| CONCENTRATION | μg/m3 | The concentration of NO2-equivalent pollution as a result of traffic. | ||
| EMISSION_NO2 | μg/m3 | The calculated emissions of NO2 due to traffic. | ||
| EMISSION_NOX | μg/m3 | The calculated emissions of NOX due to traffic. | ||
| TREEFACTOR | factor | The presence of trees (within 30 meters) as a fraction and converted to a factor between 1 and 1.5. | ||
| TREES | boolean | The presence of trees in any given location specifically. |
How-to's
References
- The overlay calculations are based on Standard Calculation Method 1 (SRM1) as defined by the dutch government: wetten.overheid.nl