Calculation and comparison method of relative average concentration of dust particles in similar areas of cities

Abstract

The invention discloses a method for measuring and comparing the average relative concentration of dust particles in similar areas in a city. The steps are: in the measurement area X, the average concentration of PM2.5 and PM10 in the atmosphere is continuously measured in real time; the measurement area is calculated. The average relative concentration of dust in the atmosphere during period a or period a in X [YC] X ;Calculate the average relative concentration of dust in the atmosphere in the same period or the same period in other areas close to the measurement area X[YC] y , where [YC] y The y in represents the number of other areas close to the measurement area X; set [YC] X with [YC] y For comparison, since the K in the similar region yc The regional dust constants are similar or equal, and the degree of dust pollution in the same period or period in similar areas can be judged; the direction of the source of dust can be judged by comparing the average relative concentration of dust in the same period or period in similar areas and the change of wind direction. The method of the invention has the advantages of simple and convenient measuring and calculating process, wide measuring and calculating range, more in line with actual conditions, more accurate results and the like.

Description

technical field [0001] The invention relates to the technical fields of environmental protection and air pollution prevention and control, in particular to the measurement and comparison of the relative average concentration of dust particles in similar areas in cities. Background technique [0002] Flying dust is a pollutant that enters the atmosphere due to the dust on the ground driven by the wind, and is an important part of the total suspended particulate matter in the ambient air. In many northern cities, dust is the main source of PM2.5. In East China, dust contributes about 10% to PM2.5. Near construction and road construction sites, dust contributes even more to PM2.5. [0003] In order to control the dust, many cities have strictly controlled the construction sites, and purchased many sprinklers and sprinklers to spray water on the roads in a cycle. There are many literatures reporting on the composition and sources of urban dust, but there are few reports on the ...

AI Technical Summary

Problems solved by technology

These methods of measuring the concentration of particulate matter in the atmosphere have no good selectivity for dust, and the measured concentration of particulate matter includes PM2.5 and PM10, etc.

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