High-precision water pollution tracing method based on multi-source data

Abstract

The invention provides a high-precision water pollution tracing method based on multi-source data, and relates to the field of multi-source data collection, and the method comprises the steps: obtaining a high-resolution satellite image of a whole water area, and extracting a water area image; establishing a water quality inversion model according to the water area image and the water quality index concentrations detected by all the detection stations in the whole water area, and obtaining water quality indexes of all positions in the water area; according to the water quality model, solving the discharge position of the pollutant and the average value of the corresponding discharge amount as initial values; and establishing an error equation according to the initial value and the actual water quality data in the water area, and solving the optimal solution of the discharge position and discharge amount of the pollutants according to a least square method. Water pollution tracing is carried out on the whole water area, the subjective limitation that the polluted water area is extracted manually and then water pollution tracing is carried out is avoided, and the workload is greatlyreduced; and the real value of the data is restored to the greatest extent by the least square-based optimal estimation method, so that the rapid and accurate positioning of the water area pollution source is realized.

Description

technical field [0001] The invention belongs to the technical field of multi-source data collection, and in particular relates to a high-precision water pollution traceability method based on multi-source data. Background technique [0002] In recent years, under the influence of various factors, the ecological environment of water resources has been facing a crisis, and water pollution accidents have occurred frequently. However, the existing traceability of water pollution is usually based on artificial means, which specifically includes the combination of ground measurement data monitored by routine monitoring sections on the ground along rivers and lakes, on-site visits and investigations of pollution sources, and for different pollutant discharge enterprises and A pollution sample database is established at the source, and the source of pollution is obtained through comparison between on-site sampling and the database. [0003] The manual method of investigation will c...

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Problems solved by technology

[0005] The existing patent application with the application number 201911252755.X involves the monitoring of water pollution by means of satellite remote sensing, but there are still some defects in the selection of the method and the specific implementation level. The water pollution traceability method in this application It is necessary to artificially extract the polluted waters first, and then trace the source. In the case of a large water area, the workload of extracting the polluted waters is relatively large, and it will also bring about the influence of human subjective factors.

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