Soil environment bearing capacity calculation method based on environment capacity and natural subduction model

Abstract

The invention provides a soil environment bearing capacity calculation method based on environment capacity and a natural reduction model, which is used for finely and quantitatively evaluating soil pollution environment bearing capacity, and comprises the following steps: calculating the soil environment capacity based on a sensitive receptor soil pollution risk threshold value; a pollutant environment multi-medium transmission model is used for simulating the input flux of environmental pollutants in soil; simulating a natural digestion process of pollutants in solid-liquid-gas three phases in soil by utilizing a pollutant soil multi-interface distribution model; a soil environment bearing capacity quantitative estimation method is established by referring to the concept of ecological biological bearing capacity; according to the method, subjectivity and coarseness of an existing soil pollution environment bearing capacity estimation method are overcome, compared with an existing evaluation method, the method is transparent in process, quantitative in parameter and precise in calculation, the result is objective and scientific, and a new research thought and a technical method are provided for precise estimation of the soil pollution environment bearing capacity.

Description

technical field [0001] The invention belongs to the technical field of soil bearing capacity calculation, in particular to a soil environmental bearing capacity calculation method based on environmental capacity and natural reduction model. Background technique [0002] With the acceleration of urbanization and industrialization, the soil environment is deteriorating day by day, and the problem of soil pollution has attracted great attention from the society. The environmental carrying capacity of soil pollution refers to the threshold value of the scale and intensity of human activities that a soil unit can withstand within a certain time and space range under the premise that the structure and function of the soil environment system remain unchanged. Therefore, soil environmental carrying capacity can be used as a safety threshold for social and economic development, and the study of soil pollution environmental carrying capacity is an important content of strengthening ba...

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Problems solved by technology

[0003] However, due to the broad concept of environmental carrying capacity, dynamic variability, regional heterogeneity, and complexity of influencing factors, the evaluation covers regional pollutant production and discharge, soil pollutant input and output, and soil pollution risks. Dimensional process simulation and quantitative calculation models make it difficult to achieve systematic and comprehensive research content and quantitative evaluation of soil environmental carrying capacity

Among them, the existing soil environmental capacity usually adopts the method of subtracting the soil environmental quality standard from the status quo of soil pollution, and lacks the consideration of the change of the soil pollution risk threshold with the spatial heterogeneity of land use types and soil types.

In addition, the current carrying capacity estimation methods only estimate the carrying capacity of soil pollutants (dynamic soil environmental capacity), or only use the comprehensive index method to qualitatively evaluate parameters such as society, economy, and population, and lack specific methods for different land use types. Comprehensive Quantitative Calculation of Human Activity Scale and Intensity of Sensitive Receptors

[0004] It can be seen that due to the lack of spatial heterogeneity in the existing soil environmental carrying capacity estimation methods and the quantitative and standardized calculation methods for the scale and intensity of human activities, the estimation results lack accuracy and guidance for actual soil environmental management.

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