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Traffic noise pollution assessment along the Ring Road of Kathmandu Valley, Nepal


Affiliations
1 Department of Environmental Science, Patan Multiple Campus, Nepal
2 Department of Environmental Science, Tri-Chandra Multiple Campus, Nepal
 

Sound or noise pollution has become a pressing issue in the major cities of the world. The rapidly growing and densely populated Kathmandu city in Nepal is no exception. Traffic noise level data were recorded in the field using sound-level meters. Each observation session was for 3 h (8–11 am) and (3–6 pm) at an interval of 10 sec on working days. The vehicle flow status was studied by direct observation, while the time series of noise pollution data and vehicles registered were updated from secondary sources. Further, various noise descriptors like traffic noise level, noise pollution level, equivalent continuous sound level (Leq), minimum sound level and maximum sound level were determined to assess noise pollution. It was found that there was no significant difference in the descriptors between the morning and evening traffic flow periods at a 5% level of significance. At all the 20 studied road junctions, Leq exceeded 70 dB(A) surpassing the recommended levels of national as well as international noise standards. If the present noise pollution level persists in Kathmandu with the growing population and number of vehicles, it will increase the chances of adverse health effects on the population

Keywords

Noise pollution, traffic noise index, sound level, Nepal.
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  • Traffic noise pollution assessment along the Ring Road of Kathmandu Valley, Nepal

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Authors

Reeta Singh
Department of Environmental Science, Patan Multiple Campus, Nepal
Dipesh Raj Pant
Department of Environmental Science, Tri-Chandra Multiple Campus, Nepal
Resham Baniya
Department of Environmental Science, Patan Multiple Campus, Nepal

Abstract


Sound or noise pollution has become a pressing issue in the major cities of the world. The rapidly growing and densely populated Kathmandu city in Nepal is no exception. Traffic noise level data were recorded in the field using sound-level meters. Each observation session was for 3 h (8–11 am) and (3–6 pm) at an interval of 10 sec on working days. The vehicle flow status was studied by direct observation, while the time series of noise pollution data and vehicles registered were updated from secondary sources. Further, various noise descriptors like traffic noise level, noise pollution level, equivalent continuous sound level (Leq), minimum sound level and maximum sound level were determined to assess noise pollution. It was found that there was no significant difference in the descriptors between the morning and evening traffic flow periods at a 5% level of significance. At all the 20 studied road junctions, Leq exceeded 70 dB(A) surpassing the recommended levels of national as well as international noise standards. If the present noise pollution level persists in Kathmandu with the growing population and number of vehicles, it will increase the chances of adverse health effects on the population

Keywords


Noise pollution, traffic noise index, sound level, Nepal.

References





DOI: https://doi.org/10.18520/cs%2Fv123%2Fi5%2F677-686