Method for tracing sudden water pollution accident of estuary point source

Abstract

The invention discloses a method for tracing a sudden water pollution accident of an estuary point source. According to the technical key points, the method comprises the following steps of 1, monitoring a flow field of a region by a monitoring station of the estuary region, and establishing an estuary flow field database; 2, from the time when pollutants are monitored by a monitoring point, monitoring and recording concentration data of the pollutants at the point every a period of time; 3, according to the recorded concentration data of the pollutants at the monitoring point, and in combination with a semidiurnal tide characteristic of the estuary region, calculating initial release time of the pollutants; 4, according to existing flow field data and the initial release time of the pollutants, back-tracing a release position of a pollution source by utilizing a Lagrangian tracking method; 5, according to a pollutant migration model, and in combination with related coefficient methods, building an estuary region pollutant tracing optimization model; and 6, solving the pollutant tracing optimization model through an improved genetic algorithm by taking the pollution source position calculated by the Lagrangian tracking method as prior information in the optimization model.

Description

technical field [0001] The invention relates to the field of traceability of pollutants in estuary areas, and specifically proposes a method for point source traceability of sudden water pollution incidents in estuary areas. Background technique [0002] Ocean transportation is one of the most important modes of transportation in international commodity exchange, and its cargo transportation accounts for more than 80% of the total international cargo transportation. Since the coastline of the eastern and southern mainland of China is more than 18,000 kilometers, the water area of ​​the inland sea and the border sea is about 4.7 million square kilometers, and there are many coastal cities, coupled with the rapid development of my country's economy and the continuous improvement of comprehensive strength in recent years , 80% to 90% of my country's total import and export cargo transportation is carried out by ocean transportation. With the development of the international shi...

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Problems solved by technology

At present, the research on the traceability of pollutants in the coastal estuary area is still immature. Compared with the river channel, it has a more complex flow field, and lacks a simple and reliable method for identifying the location and intensity of pollution sources.

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