Method for using permanent position pollutant detector to identify urban space multi-pollutant sources

Abstract

The invention provides a method for using a permanent position pollutant detector to identify urban space multi-pollutant sources, and belongs to the technical field of atmospherical pollutant source identification. The method comprises the steps of building a three-dimensional model of a corresponding building through an urban three-dimensional map, and simulating and calculating a velocity field of an urban area according to leading wind speed and wind direction in the upwind direction of the urban area provided by a meteorological station; selecting positions and pollutant concentration data of three pollutant detector readers, and using an accompany method to calculate a potential pollutant source position and release strength; continuing choosing other detectors according to a certain principle aimed at the condition of the multi-pollutant sources, identifying the pollutant sources according to data of every three pollutant detectors, and repeating the procedure for two to three times so that one pollutant source can be identified. The influence on the identified pollutant source on the identification process of other pollutant sources can be eliminated according to a theoretical basis that a pollutant transportation equation is a linear equation under the steady condition of a flow field. In this way, multi-pollutant sources can be quickly and accurately identified.

Description

Technical field [0001] The invention belongs to the technical field of air pollutant source identification, and specifically is a method for identifying multiple pollutant sources in urban space by using a fixed-position pollutant detector, and is used to identify the location and release intensity of multiple pollutant sources that exist simultaneously , So as to control the source of pollutants. Background technique [0002] The existing pollutant source identification methods are mainly divided into two categories: forward calculation methods and reverse calculation methods. The forward calculation method is a relatively simple trial and error method. For example, in the article Identifying sources of groundwater pollution: an optimization approach, Gorelick SM et al. gradually approached the location of the pollutant source through the continuous tentative movement of the movable detector. , Such a method is often inefficient. The reverse calculation method starts from the ...

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Problems solved by technology

Representatively, Cai et al. used the forward method to identify multi-pollutant sources in the article Fast identification of multiple indoorconstant pollutant sources by ideal sensors: a theoretical model and numerical validation. The results showed that this method required a large amount of computing resources and It is necessary to know in advance the location of possible pollutant sources and other data that are difficult to obtain in actual situations.

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