Tracing and analyzing method for urban air pollutants

Abstract

The invention provides a tracing and analyzing method for urban air pollutants. The tracing and analyzing method comprises the following steps: collecting monitoring data of various pollutant concentrations in the air by monitoring points arranged in a city; calculating a daily prevailing wind direction and major pollution time periods by combining the monitoring data, and air quality indexes of acceptor points and neighboring country stations; selecting mini-type stations in an upwind wind direction and adjacent four wind direction regions according to the daily prevailing wind direction andthe major pollution time periods; carrying out time correction on the selected mini-type stations; combining the mini-type stations subjected to the time correction and data of the acceptor points tocalculate sequencing indexes; selecting the mini-type stations with the front k sequencing indexes and carrying out empathized analysis; calculating a concentration contribution rate from a mini-typestation periphery pollution source to the corresponding mini-type station and returning back front N pollution sources with the highest concentration contribution rate. According to the tracing and analyzing method provided by the invention, the contribution rate of the pollution source to the mini-type station can be directly displayed and pollution degrees of the different pollution sources aredisplayed, so that accurate positioning of the pollution sources is realized.

Description

technical field [0001] The invention relates to the field of environmental science and technology, in particular to a source-tracing analysis method for urban air pollutants. Background technique [0002] In recent years, with the sustained and rapid economic and social development, industrialization and urbanization have intensified, energy consumption has increased rapidly, air pollution has become increasingly serious, and the total amount of air pollutant emissions has remained high. With the increase of pollutant discharge, people's living environment is deteriorating day by day, smog weather is frequent, smog has seriously damaged the image of the city, affected social and economic production activities, and brought serious harm to people's health. Accurate positioning of air pollution sources has always been a technical problem in this field, and there is no practical and feasible technical method to accurately locate air pollution sources. [0003] The existing air ...

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Problems solved by technology

The precise positioning of air pollution sources has always been a technical problem in this field, and there is no practical and feasible technical method to achieve accurate positioning of air pollution sources

[0003] The existing air pollution source location methods are mainly divided into two categories, one is based on the method of isotope tracking, this method is mainly aimed at determining the location of heavy metal pollution sources, and the cost is high; the other is to directly use the Gaussian puff model , the position of the pollution source is deduced by the method of coordinate transformation, and this method is only an independent coordinate system centered on a single accident point, and the model does not give the proportion of different pollution sources to the same receptor point

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