Pollution source tracking method based on backward trajectory and system thereof

A technology of backward trajectory and tracking system, applied in transmission systems, electrical components, etc., can solve problems such as insufficient accuracy, inability to simulate local airflow operating conditions well, and inability to solve pollution source tracking, etc., to achieve accurate results.

Active Publication Date: 2015-06-10
SUN YAT SEN UNIV +1
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Problems solved by technology

[0003] However, the weather data used by the above HYSPLIT model is 111KM*111KM data. This data cannot simulate the operating state of the local airflow very well. It is very likely that the transport trajectory of pollutants will be changed due to the influence of the local airflow. Therefore, it is calculated by the HYSPLI...

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  • Pollution source tracking method based on backward trajectory and system thereof
  • Pollution source tracking method based on backward trajectory and system thereof
  • Pollution source tracking method based on backward trajectory and system thereof

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Embodiment Construction

[0064] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements.

[0065] Please refer to figure 1 , the pollution source tracing method based on the backward track of the present invention comprises the following steps:

[0066] Step S101, according to the backward trajectory l of the pollutant, the transportation probability R_(i,j), the distance weight W_d(i,j) and the time weight W_tl(i ,j);

[0067] It should be noted that the pollutants mentioned here and below correspond to the same pollutant, that is, the present invention is described with a specific pollutant as an example, and the calculation process is as follows:

[0068] (1) The formula for calculating the transport probability R_(i,j) of pollutants in the grid according to the backward trajectory l of pollutants is:

[0069] R_(i,j)=τ_l(i,j) / n

[0070] Where τ_l(i,j) is the residence time of the backward trajectory l o...

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Abstract

The invention discloses a pollution source tracking method based on a backward trajectory. The method comprises the steps: S1, calculating the conveying probability, distance weight and time weight of a pollutant in each grid which is passed by the backward trajectory according to the backward trajectory of the pollutants; S2, calculating the conveying strength of the pollutants in the grids in accordance with the conveying probability, distance weight, time weight and discharge intensity; S4, calculating the total conveying intensity of the pollutants on the backward trajectory according to the conveying intensities of all grids; S5, repeating a plurality of backward trajectories to repeat the steps S1 to S4 so as to obtain a plurality of total conveying intensities; and S6, taking grid area with maximum total conveying intensity which the front N backward trajectories are passed as a prediction area, and the geographic position of the pollution source can be determined according to the prediction area and a source list. Compared with the prior art, the location tracking of the pollution source can be realized, and the important basis can be provided for solving an air pollution problem. Meanwhile, the invention discloses a pollution source tracking system based on the backward trajectory.

Description

technical field [0001] The invention relates to the technical field of environmental monitoring, and more particularly to a method and system for tracking pollution sources based on backward trajectory. Background technique [0002] As air pollution becomes more and more serious, the analysis of pollution sources is becoming more and more important. At present, the model for calculating the backward trajectory of pollutants is HYSPLIT, and the HYSPLIT-4 model is jointly developed by the Air Resources Laboratory of the National Oceanic and Atmospheric Administration (NOAA) and the Australian Bureau of Meteorology in the past 20 years. It is a professional model for analyzing and analyzing the transportation and diffusion trajectories of atmospheric pollutants. This model has a relatively complete transportation, diffusion and deposition model that can deal with the input fields of various meteorological elements, various physical processes and different types of pollutant emi...

Claims

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Application Information

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IPC IPC(8): H04L29/08
CPCH04L67/12H04L67/52
Inventor 徐伟嘉刘靖伟黄慎李红霞梁健俊
Owner SUN YAT SEN UNIV
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