Effect of green spaces on the reduction of noise from road traffic flows in Irkutsk
Abstract
The work is devoted to the assessment of the efficiency of green belts on road sections in the city of Irkutsk. For this purpose video surveillance of the composition and traffic intensity of vehicles was carried out during rush hours. Sound pressure levels were measured in areas with and without green spaces located along highways, using sound level meters. The obtained results were compared with the prescribed sanitary norms of permissible noise loads. Statistical characteristics of the noise level recorded in key areas were calculated. The analysis of the results obtained made it possible to reveal the excess of acoustic standards established in the Russian Federation, and the ability of investigated strips of green spaces to reduce the level of traffic noise by an average of 9,7 dBA. It was found that green spaces of the key areas under study are not sufficiently efficient to ensure the noise level that meets the established sanitary standards (55 dBA). Analysis of the data obtained during field measurements of the sound level at various distances from the road with different traffic intensity indicates the acoustic load on the territory exceeding the daytime hygienic standard by 15,2–23,8 dBA. It was found that traffic flows create a low frequencies noise level, but green spaces achieve the greatest absorption effect at high frequencies (above 1000 Hz). The noise generated on the carriageway propagates both to the first echelon of houses and deeper into residential buildings. Recommendations for reducing the sound pressure level to ensure the acoustic well-being of the population in residential areas adjacent to highways are proposed. Increasing the efficiency of green spaces throughout the territory subject to acoustic load should be achieved by placing multi-row tree belts near both noise sources and protected objects. A whole range of urban planning, engineering and administrative and organizational measures is necessary to reduce acoustic pollution of the environment by application of traditional and alternative methods on road sections.
About the Authors
S. A. NovikovaRussian Federation
Faculty of Railway Construction, Department of Technosphere Safety, Senior Lecturer
D. N. Martynov
Russian Federation
Faculty of Ecology and Nature Management, Department of Geography, Nature Management and Spatial Development, Master’s student
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Review
For citations:
Novikova S.A., Martynov D.N. Effect of green spaces on the reduction of noise from road traffic flows in Irkutsk. Vestnik Moskovskogo universiteta. Seriya 5, Geografiya. 2022;(4):16-25. (In Russ.)