Abstract
Fence for traffic noise control sometimes causes adverse effect on air pollution. Thus in this study, performance of porous fence as a tool for control of both air pollution and noise pollution was evaluated. A two-dimensional numerical model for flow and pollutant concentration and an analytical model for traffic noise were utilized in the analysis of a double-decked road structure with fences only at ground (Case 1) and at both ground and upper deck (Case 2). Porous fences were assumed only at the ground level since the solid fences at the upper deck usually leads to desirable result on air pollution. Effects of the variable porosity on air quality and noise level near road were evaluated. Obtained results showed: (1) flow pattern in leeward of fence was drastically changed at 40–50% porosity in Case 1 and 50% in Case 2. The porosity larger than 40% excluded presence of a circulation behind the fence. (2) Effect of porous fence on air pollution was different in Cases 1 and 2. In Case 1, the porous fence generally resulted in the reduction of air pollution at the ground level; on the other hand, in Case 2, it rather led to increase of the concentration. (3) Traffic noise level was also largely changed by the porosity of the fence; an example of simultaneous evaluation of the effects of porous fence on both air and noise pollution in Case 1 showed that the fence of 60% porosity leads to reduction of air pollution by 20% compared with solid fence case, and reduction of noise pollution by 4–6% in dB compared with no fence case, at l m high and 10 m from the road.
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References
AEA Technology: 1997, CFX4.2 Solver Manual.
Aichi Prefecture Office: 2002, Environmental White Paper, 440 pp.
Baik, J. J. and Kim, J. J.: 2002, ‘On the escape of pollutants from urban street canyons’, Atmos. Environ. 36, 527–536.
Castro, I. P.: 1971, ‘Wake characteristics of two-dimensional perforated plates normal to an air-stream’, J. Fluid Mech. 46(3), 599–609.
Lee, I. Y. and Park, H. M.: 1994, ‘Parameterization of the pollutant transport and dispersion in urban street canyons’, Atmos. Environ. 28, 2343–2349.
Lee, S. J. and Kim, H. B.: 1999, ‘Laboratory measurements of velocity and turbulence field behind porous fences’, J. Wind Eng. Ind. Aerodyn. 80, 311–326.
Lee, S. J. and Lim, H. C.: 2001, ‘A numerical study on flow around a triangular prism located behind a porous fence’, Fluid Dyn. Res. 28, 209–221.
Leong, S. T. and Laortanakul, P.: 2003, ‘Monitoring and assessment of daily exposure of roadside workers to traffic noise levels in an Asian city: A case study of Bangkok streets’, Environ. Monit. Assess. 85, 69–85.
Maekawa, Z.: 1962, ‘Experimental study on acoustical designing of a screen for noise reduction (in Japanese)’, J. Acoust. Soc. Jpn. 18(4), 187–196.
Maekawa, Z.: 1990, Architectural and Environmental Acoustics (in Japanese), Kyoritsu Shuppan.
Martin, S. J. and Hothersall, D. C.: 2002, ‘Numerical modeling of median road traffic barriers’, J. Sound Vibr. 251(4), 671–681.
Packwood, A. R.: 2000, ‘Flow through porous fences in thick boundary layers: Comparisons between laboratory and numerical experiments’, J. Wind Eng. Ind. Aerodyn. 88, 75–90.
Perera, M. D. A. E. S.: 1981, ‘Shelter behind two-dimensional solid and porous fences’, J. Wind Eng. Ind. Aerodyn. 8, 93–104.
Raju, K. G. R., Loeser, J. and Plate, E. J.: 1976, ‘Velocity profiles and fence drag for a turbulent boundary layer along smooth and rough flat plates’, J. Fluid Mech. 76(2), 383–399.
Research Committee of Road Traffic Noise in Acoustical Society of Japan: 1999, ‘Prediction model for traffic noise, ‘ASJ Model 1998’ (in Japanese)’, J. Acoust. Soc. Jpn. 55(4), 281–324
Richards, P. J. and Robinson, M.: 1999, ‘Wind loads on porous structures’, J. Wind Eng. Ind. Aerodyn. 83, 455–465.
Road Environment Division, National Institute for Land and Infrastructure Management: 1998, Report on Observational Data on Road Environment in 1997 and 1998. Ministry of Land, Infrastructure and Transport, Japan.
Sgardo, A. P. G., van Beeck, J., Rambaud, P. and Olivari, D.: 2002, ‘Numerical and experimental modeling of pollutant dispersion in a street canyon’, J. Wind Eng. Ind. Aerodyn. 90, 321–339.
Tokairin, T. and Kitada, T.: 2004, ‘Numerical investigation of the effect of road structures on ambient air quality – for their better design’, J. Wind Eng. Ind. Aerodyn. 92, 85–116.
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Tokairin, T., Kitada, T. Study on the effect of porous fence on air quality and traffic noise level around a double-decked road structure. Environ Monit Assess 105, 121–143 (2005). https://doi.org/10.1007/s10661-005-3160-9
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DOI: https://doi.org/10.1007/s10661-005-3160-9