The Effect Study of Distance and Planting Width of Tree Species of Abadeh City Green Space in Sound Pollution Control

Subject Areas : nosie

mohammad barzegar ¹ , haniyeh nowzari ²

1 - Superior expert of city services of the Abadeh municipality Department of Environment, Abadeh Branch, Islamic Azad University, Abadeh, Iran.
2 - Assistant Professor, Department of Environment, Abadeh Branch, Islamic Azad University, Abadeh, Iran. *(Corresponding Author)

Received: 2018-12-23 Accepted : 2019-05-26 Published : 2020-09-22

Keywords: Tree species, Sound intensity level, green space, Abadeh, Noise pollution,

Abstract :

Background and Objective: Green space is effective in reducing noise pollution. The purpose of this research was to study the effect of tree species in the green space of Abadeh, as well as the number of tree plantation rows and planting width on decreasing the intensity of sound. Method: In this study, four stations in two areas was selected in Abadeh city including Shahid Chamran Blvd. and Northern Passageway and sampling was carried out in two turns in the morning and evening using the Cirrus sound level  meter CR: 303 in March, 2018 and 25 data in each station and 400 data in total was recorded. Findings: The results of comparing the average sound intensity level measured in the two studied areas in the morning and evening with the Iranian national standard show that the average sound intensity level in both regions is higher than the standard; So despite the green space, there is noise pollution in both areas. The results of the study of sound intensity levels in Shahid Chamran Boulevard and along the northern passage in the morning and evening show that there is a negative correlation between the distance from the sound source (distance from the street) and the number of rows of trees planted and the average sound intensity level. This means that the greater the distance from the street and the number of rows of trees planted, the greater the amount of noise reduction. Discussion and Conclusion: The highest noise reduction in Shahid Chamran Boulevard is related to the distance of 54 meters from the edge of the street with 14 rows of planting with average sound intensity level for morning and evening of 65.04 and 60.96 dB, respectively, and next to the northern passage is related to the distance of 85 meters from the edge. The street was planted with 10 rows and there was a hill with an average level of sound intensity for the morning and evening of 65.04 and 64.08 dB, respectively.

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