ECN publication
Onderzoek naar de luchtkwaliteit rondom een vegetatiestrook langs de snelweg
Published by: Publication date:
ECN Biomass, Coal and Environmental Research 14-8-2007
ECN report number: Document type:
ECN-E--07-011 ECN publication
Number of pages: Full text:
50 Download PDF  

This report presents downwind measurements of air quality around vegetation near a motorway. The study (first ever in the Netherlands) was performed by order of the Innovation Programme Air Quality. At a carefully selected location measurements of PM and NOx were carried out downwind from a motorway in front of and (at various distances) behind a parallel orientated vegetation strip. Results are compared with synchronized data collected at a nearby location without vegetation (the 'reference' situation) and at the same distances from the motorway. Major findings are: • Comparing measurements in front of and behind the vegetation strip show that the presence of vegetation tends to lower PM10 and PM2.5 concentrations immediately behind the vegetation. However, no such change is apparent in the concentrations of NO and NO2. • The comparison with measurements executed without vegetation ('reference') indicate that concentration levels close to the vegetation strip are similar or somewhat higher. • At a larger distance from motorway and vegetation (>30 m) NO and NO2 concentrations tend to be lower than what is observed in the reference situation. This could not be determined for PM.

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