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SpringerPlus

, 5:1898

Earth and Environmental Sciences

Abstract

PurposeIn this study, the spatial and temporal relationship of wind speed, atmospheric particles concentration, and the industrial-induced noise levels during different times of the day were examined, using sawmill industrial location around Ile-Ife in Osun of Nigeria as a case study.

MethodsMobile devices were used to measure noise level and basic meteorological parameters were examined and their influences on the noise levels distribution were assessed. The maximum and minimum sound levels; Lmax and Lmin, the PM10 and PM1 particle concentrations, wind speeds and directions were measured in the morning 7–9 a.m., afternoon 12–2 and evening 4–6 p.m. over 14 consecutive days.

ResultsThe results revealed that the noise level varies spatiotemporally, much more consistent spatial distribution along the vicinity of sawmill industries. A higher level of noise occurred during the weekday WD, Leq > 70 dBA, compared to weekends WE. Extreme average noise levels are associated with the immediate neighbourhood of sawmill industrial areas during WD compared to streets and road annexes of the study area. The results also show a very weak relationship between noise and PM10 and PMcoarse for both WD and WE with r < 0.35 for PM1 and r < 0.20 for PMcoarse. There appears to be a moderate significant correlation between noise level and PM1 during some meteorological conditions with r > 0.51.

ConclusionThe slight relationship between noise and PM1 is perhaps a result of wind movement that carries particles from the source region since booth noise and particles mostly originate from the sawmill. The study concludes that wind speeds and directions have a significant influence on both noise level and particle concentration within the study sites.

KeywordsWind speed-direction Atmospheric particles Turbulent Noise levels  Download fulltext PDF



Autor: Ayansina Ayanlade - Ebunoluwa Folasade Oyegbade

Fuente: https://link.springer.com/



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