Method for simulating spatial and temporal migration trend distribution of organic pollutants

Abstract

The embodiment of the invention discloses a method for simulating the spatial and temporal migration trend distribution of organic pollutants and relates to the field of organic pollutant migration distribution simulation. The method comprises the following steps that: S1, a database is established; S2, grid division is performed on a research area; S3, a four-level escape model is established, specifically, an escape calculation formula, a Z value calculation formula, a D value calculation formula and an advection calculation formula are integrated, and the formulas are programmed through a Matlab programming platform; and S4, four-stage multi-medium escape model simulation is performed by adopting the four-stage escape model and on the basis of advection rules. According to the method, spatial heterogeneity is solved by gridding the research area; a set of independent parameter files is configured for each grid and is corresponding to years in which simulation is performed, and therefore, the method more conforms to an actual situation; the advection rules are added; and the migration of the pollutants among grids is achieved through the advection rules, so that a simulation result is closer to an actual situation. Compared with an existing method, the method is closer to the actual situation.

Description

technical field [0001] The embodiments of the present invention relate to the field of simulating the migration and distribution of organic pollutants, and in particular to a method for simulating the distribution of organic pollutants' migration and fate in time and space. Background technique [0002] Since the 20th century, the world has entered rapid agriculturalization, industrialization and urbanization, and the demand for artificial chemicals has been increasing day by day. These chemicals are released into the environment (atmosphere, water, soil, sediment and plants) through various channels, Among them, toxic and harmful chemicals cause environmental pollution and have a serious impact on human health. Persistent organic pollutants (POPs) are a class of chemical substances that are ubiquitous in the world and have the characteristics of environmental persistence, bioaccumulation, biological toxicity, and long-distance transmission. The traditional method of contro...

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Problems solved by technology

[0010] For this reason, the embodiment of the present invention provides a method for simulating the spatial-temporal migration and fate distribution of organic pollutants, which solves the spatial heterogeneity by gridding the research area; configures a set of independent parameter files for each grid (Physicochemical parameters of pollutants, environmental parameters), and correspond to the year of simulation, which is more in line with the actual situation; adding the advection rule, the migration of pollutants between the grids is realized through the advection rule, and the simulation results are closer to the actual situation; using four levels The fugacity model, which takes months as a simulation stage, is closer to the actual situation than the existing methods (in years), so as to solve the problems existing in the existing technology

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