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Series / Report no.
RIVM rapport 680705006
Open Access
Type
Report
Language
nl
Date
2009-03-27
Research Projects
Organizational Units
Journal Issue
Title
Geinterpoleerde meteorologie voor SRM-1: toepassing
in 2007
Translated Title
Interpolated meteorology for SRM-1: utilization in
2007
Published in
Abstract
Met ingang van 2008 wordt kennis van meteorologie op
een nieuwe manier gebruikt om de luchtkwaliteit in stedelijk gebied te
berekenen. Hierdoor zal de berekende luchtkwaliteit in straten beter
aansluiten bij de realiteit.
In 2007 heeft het RIVM een nieuwe methodiek voorgesteld om de Standaard
Reken Methode 1 (SRM-1) te verbeteren. Recentelijk heeft het Ministerie van
Volkshuisvesting, Ruimtelijke Ordening en Milieubeheer (VROM) deze methodiek
geaccepteerd. In dit rapport wordt de methodiek concreet uitgewerkt.
Lokale overheden gebruiken de wettelijk voorgeschreven SRM-1, ook bekend als
het CAR II-model, om de luchtkwaliteit in stedelijk gebied te berekenen.
De nieuwe methodiek is nauwkeuriger omdat hij gegevens over windsnelheden
van meerdere meetpunten gebruikt. Bovendien maakt het gebruik van zogeheten
geinterpoleerde windvelden, die de lokale situatie beter weergeven. Tot
2008 maakte SRM-1 gebruik van jaargemiddelde gegevens voor de windsnelheid
die alleen per regio beschikbaar waren. Hierdoor ontstonden onder meer aan
de regiogrenzen 'sprongen' in de berekende bijdragen van verkeer aan
concentraties van vervuilende stoffen.
In 2008, professional knowledge of meteorology is applied in a new manner to calculate the air quality in urban areas. This approach leads to a better agreement between the calculated air quality and the actual situation. In 2007, the RIVM proposed the implementation a new methodology aimed at improving the Standard Calculation Method 1 (SRM-1). This new methodology, which is based upon interpolated wind velocities, has recently been approved by the Ministry of Spatial Planning, Housing and the Environment (VROM) of the Netherlands. This report describes in concrete terms how this methodology has been developed. Dutch municipalities use the governmentally approved SRM-1 - also known as the CAR II-model - to calculate air quality in urban areas. The new methodology is more precise because it enables all available data on wind velocities to be incorporated into the calculations. It also utilizes so-called interpolated windfields, which enables the local situation to be described more accurately. Up until 2008, the SRM-1 used averaged air velocities that were available for different regions in the Netherlands. One of the unwelcome outcomes of this approach was the appearance of sudden 'jumps' in the calculated contributions of traffic to the concentration of pollutants at the boundaries of the regions.
In 2008, professional knowledge of meteorology is applied in a new manner to calculate the air quality in urban areas. This approach leads to a better agreement between the calculated air quality and the actual situation. In 2007, the RIVM proposed the implementation a new methodology aimed at improving the Standard Calculation Method 1 (SRM-1). This new methodology, which is based upon interpolated wind velocities, has recently been approved by the Ministry of Spatial Planning, Housing and the Environment (VROM) of the Netherlands. This report describes in concrete terms how this methodology has been developed. Dutch municipalities use the governmentally approved SRM-1 - also known as the CAR II-model - to calculate air quality in urban areas. The new methodology is more precise because it enables all available data on wind velocities to be incorporated into the calculations. It also utilizes so-called interpolated windfields, which enables the local situation to be described more accurately. Up until 2008, the SRM-1 used averaged air velocities that were available for different regions in the Netherlands. One of the unwelcome outcomes of this approach was the appearance of sudden 'jumps' in the calculated contributions of traffic to the concentration of pollutants at the boundaries of the regions.
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VROM