Visualization and Analysis of COVID-19 Impact on PM2.5 Concentration in Guwahati city

By the end of year 2019, the whole world got effected by a very dangerous disease, COVID-19. It first originated in the city of Wuhan, China. Eventually this disease which is highly infectious became a pandemic worldwide [1]. Most of the countries of the world initiated the process of lockdown to lessen the impact of infection. Air pollution is a major global problem. Specially in Guwahati growing air pollution has emerged as a major concern. Guwahati is one of the place which has a very high Black Carbon level of pollution in the world. Out of all the pollutants PM2.5 is the most dangerous one. PM2.5 is less than 2.5 micrometer in diameter and is responsible for causing many serious health issues related to human respiratory system, cardiovascular and cardiopulmonary diseases. So it is utmost necessary to study the PM2.5 level in Guwahati city. As a result of the implementation of the lockdown, there was reduction of atmospheric pollution in many metropolitan cities and in Guwahati also [2]. In this paper, we have done a analysis on the trend of PM2.5 concentration prior-lockdown, during lockdown and after-lockdown for Guwahati city. We have proposed an efficient visualization algorithm to represent PM2.5 pollutant trend prior-lockdown, during lockdown and after-lockdown and analyze the results in a quick, direct and clear manner.