Document Type: ORIGINAL RESEARCH PAPER

Authors

Department of Environmental Science, Stamford University Bangladesh, Dhaka-1209, Bangladesh

Abstract

BACKGROUND AND OBJECTIVES: The Bangladesh government declared a general holiday beginning on March 26, 2020 aimed to combat coronavirus (COVID-19) pandemic. The aim of this study was to assess the impacts of the general holiday on air quality in Dhaka city area of Bangladesh.
METHODS: Hourly PM2.5 (aerodynamic diameter ≤2.5 µm) data was collected from publicly available World's Air Pollution: Real-time Air Quality Index Project from March 1 to May 16 for the five years 2016 to 2020. Tukey Multiple Comparison test was conducted to address the observable level of air quality changes between the years. Additionally, Moderate Resolution Imaging Spectroradiometer using the Aerosol Optical Depth with 550nm wavelength was analyzed during the same time period.
FINDING: This Study found that, between April 7 and May 16, the mean daily reading of PM2.5 was less in 2020 when compared to previous years. The mean hourly reported PM2.5 during working hours of 6AM and 8 PM for 2020 was statistically lower (at α= 0.01 level) than all other years 2019, 2018, 2017 and 2016.  The mean hourly reported PM2.5 for 2019 was statistically higher (at α = 0.01 level) than all other years 2020, 2018, 2017, and 2016.  The Bus Rapid Transit and Mass Rapid Transit Construction in 2019 contributed between 24.2% and 38.6% of the PM2.5 dust during this period. The elimination of diesel bus traffic during working hours in 2020 reduced the dust levels between 15.9% and 36.3% compared to the previous four years.  A declining trend of AOD550 values was observed from April 7 to May 16, 2020 compared to previous four years (2016-2019).
CONCLUSION: During the general holiday period in Dhaka, the daily and working hour PM2.5 as well as daily Aerosol Optical Depth were reduced compared to previous four years (2016-2019). Government action is recommended to reduce dust created during major construction projects. It is recommended the government authorize the replacement of buses with less polluting vehicles.

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ADB, (2020). COVID-19 economic impact could reach $8.8 trillion globally. Asian Development Bank. Retrieved on 27th May 2020.

Begum, B.A.; Biswas, S.K.; Hopke, P.K., (2011). Key issues in controlling air pollutants in Dhaka, Bangladesh Atmos. Environ., 45(40): 7705-7713 (9 Pages).

Cui, J.; Li, F.; Shi, Z.L., (2019). Origin and evolution of pathogenic coronaviruses. Nat. Rev. Microbiol., 17(3): 181-192 (12 pages).

Dutheil, F.; Baker, S.J.; Navel, V., (2020). COVID-19 as a factor influencing air pollution? Environ. Pollut., 263: 114466 (3 Pages).

He, L.; Zhang, S.; Hu, J.; Li, Z.; Zheng, X.; Cao, Y.; Xu, G.; Yan, M.; Wu,Y., (2020). On road emission measurements of reactive nitrogen compounds from heavy duty diesel trucks in China. Environ. Pollut., 262: 114280 (25 Pages).

Hossain, M.M.; Majumder, A.K.; Islam, M.; Nayeem, A.A., (2019). Study on ambient particulate matter (PM2.5) with different mode of transportation in Dhaka city, Bangladesh. Am. J. Pure Appl. Sci., 1(4): 12-19 (8 Pages).

Hsu, N.C.; Gautam, R.; Sayer, A.M.; Bettenhausen, C.; Li, C.; Jeong, M.J.; Tsay, S.C.; Holben, BN., (2012).
Global and regional trends of aerosol optical depth over land and ocean using SeaWiFS measurements from 1997 to 2010. Atmos. Chem. Phys., 12: 8037-8053 (17 Pages).

IEDCR, (2020). Distribution of confirmed cases in Bangladesh. Institute of Epidemiology, Disease Control and Research. Retrieved on 7th June.

ILO, (2020). ILO Monitor 2nd edition: COVID-19 and the world of work, updated estimates and analysis. International Labour organization. Retrieved on 27th May 2020.

IQAir, (2019). World air quality report, region and city PM2.5 ranking. Retrieved on 1st June 2020.

Kapil, S., (2020). Aerosol levels at 20-year-low in north India: NASA satellite data. Retrieved on 4th June 2020.

Kayes, I.; Shahriar, S.A.; Hasan, K.; Akhter, M.; Kabir, M.M.; Salam, M.A., (2019). The relationships between meteorological parameters and air pollutants in an urban environment. Global J. Environ. Sci.  Manage., 5(3): 265-278 (14 Pages).

Levy, R.C.; Remer, L.A.; Tanré, D.; Mattoo, S.; Kaufman, Y.J., (2009). Algorithm for remote sensing of tropospheric aerosol over dark targets from MODIS. Product ID: MOD04/MYD04. (96 pages)

Lu, H.; Stratton, C.W.; Tang, Y.W., (2020). Outbreak of pneumonia of unknown etiology in
Wuhan China: the Mystery and the Miracle. J. Med. Virol., 92: 401-402 (2 pages).

Majumder, A.K.; Al Nayeem, A.; Patoary, M.N.A.; Carter, W.S., (2020). Temporal variation of ambient particulate matter in Chattogram City, Bangladesh. J. Air Pollut., Health, 5(1): 33-42 (10 Pages).

Masum, M.H.; Pal, S.K., (2020). Statistical evaluation of selected air quality parameters influenced by COVID-19 lockdown. Global J. of Environ. Sci. and Manage., 6(SI); 85-94 (10 Pages).

Nadzir, M.S.M.;  Ooi, M.C.G.; Alhasa, K.M.;  Bakar, M.A.A.;  Mohtar, A.A.A.; Nor, M.F.F.M.; Latif, M.T.; Abd Hamid, H.H.; Ali, S.H.M.; Ariff, N.M.;  Anuar, J., (2020). The impact of movement control order (MCO) during pandemic COVID-19 on local air quality in an urban area of Klang Valley, Malaysia. Aerosol Air Qual. Rese., 20(6): 1237-1248 (12 Pages).

Nakada, L.Y.K.; Urban, R.C., (2020). COVID-19 pandemic: Impacts on the air quality during the partial lockdown in São Paulo state, Brazil. Sci. Total Environ., 730: 139087 (15 Pages).

Nayeem, A.A.; Hossain, M.S.; Majumder, A.K.; Carter, W.S., (2019). Spatiotemporal Variation of Brick Kilns and its Relation to Ground-level PM2.5 through MODIS Image at Dhaka District, Bangladesh Int.  J. Environ. Pollut. Environ. Modell., 2(5): 277-284 (8 pages).

Razib; Nayeem, A.A.; Hossain, M.S.; Majumder, A.K., (2020). PM2.5 concentration and meteorological characteristics in Dhaka, Bangladesh. Bangladesh J. Sci. Indus. Res., 58(2):89-98 (10 Pages).

Rana, M.M.; Khan, M.H.; Azad, M.A.K.; Rahman, S.; Kabir, S.A., (2020). Estimation of idle emissions from the on-road vehicles in Dhaka. J. Sci. Res., 12(1): 15-27 (13 Pages).

Rana, M.M.; Sulaiman, N.; Sivertsen, B.; Khan, M,F.; Nasreen, S., (2016). Trends in atmospheric particulate matter in Dhaka, Bangladesh, and the vicinity. Environ. Sci. Pollut. Res., 23(17): 17393-403 (21 pages).

Sharma, S.; Zhang, M.; Gao, J.; Zhang, H.; Kota, S.H., (2020). Effect of restricted emissions during COVID-19 on air quality in India. Sci. Total Environ., 728: 138878 (19 pages).

Shrestha, A.M.; Shrestha, U.B.; Sharma, R.; Bhattarai, S.; Tran, H.N.T.; Rupakheti, M., (2020). Lockdown caused by COVID-19 pandemic reduces air pollution in cities worldwide (28 Pages).

Singh, R.K.; Chakraborty, D., (2020). World’s dirtiest air gets cleaner after India’s Lockdown. Retrieved on 4th June.

Tobías, A.; Carnerero, C.; Reche, C.; Massagué, J.; Via, M.; Minguillón, M.C.; Alastuey, A.; Querol, X., (2020). Changes in air quality during the lockdown in Barcelona (Spain) one month into the SARS-CoV-2 epidemic. Sci. Total Environ., 726: 1–4 (4 pages).

USEPA, (2012). Air Quality Index. United States Environmental Protection Agencies.

Wang, P.; Chen, K.; Zhu, S.; Wang, P.; Zhang, H., (2020). Severe air pollution events not avoided by reduced anthropogenic activities during COVID-19 outbreak. Resour. Conserv. Recycl., 158: 104814 (9 pages).

WHO, (2020). Rolling updates on coronavirus disease (COVID-19). World Health Organization, Geneva. Retrieved on 1st June 2020.

Zambrano-Monserrate, M.A.; Ruano, M.A.; Sanchez-Alcalde, L., (2020). Indirect effects of COVID-19 on the environment. Sci. Total Environ., 728: 138813 (4 pages).