CN-122023092-A - Underground water pollution tracing method for producing enterprises

CN122023092ACN 122023092 ACN122023092 ACN 122023092ACN-122023092-A

Abstract

The invention relates to the field of underground water pollution tracing, in particular to an underground water pollution tracing method in a production enterprise. Firstly, carrying out standardization treatment on the obtained original concentration values of different pollution factors to obtain concentration values standardized by the different pollution factors, then carrying out principal component analysis, calculating a covariance matrix, carrying out characteristic decomposition to obtain a load and screening main control pollution factors, then adopting a pollution source candidate region preliminary screening algorithm based on the concentration values standardized by the different pollution factors to obtain a pollution source candidate region, and finally, calculating the position coordinates of a final pollution source through a steady-state weighted convection-dispersion point source joint inversion algorithm based on the pollution source candidate region. The method solves the technical problems of slow calculation speed, high cost and low precision caused by overlarge search space of preliminary positioning of the pollution sources, unreasonable tracing weight distribution caused by neglecting the difference of the importance of the pollutants and neglecting the convection effect of the underground water caused by the dimension disaster caused by the high-dimension data of the multi-pollutants.

Inventors

LIU XIAOYU
ZHU GANGHUI
HU QIANG
LI YUANYUAN
LIU WEIJIANG
CHEN RUIHUI
HAN QIAOCHU

Assignees

生态环境部土壤与农业农村生态环境监管技术中心

Dates

Publication Date: 20260512
Application Date: 20260316

Claims (9)

1. The method for tracing the pollution of the underground water of the production enterprise is characterized by comprising the following steps of: S1, carrying out standardization treatment on the obtained original concentration values of different pollution factors to obtain concentration values standardized by the different pollution factors; performing principal component analysis based on concentration values standardized by different pollution factors, calculating a covariance matrix, performing characteristic decomposition, obtaining a load, and screening main control pollution factors; S2, based on concentration values standardized by different pollution factors, a pollution source candidate region primary screening algorithm is adopted to obtain a pollution source candidate region, and based on the pollution source candidate region, the position coordinates of the final pollution source are calculated through a steady-state weighting convection-dispersion point source joint inversion algorithm.
2. The method for tracing groundwater pollution in a production enterprise according to claim 1, wherein the step S1 specifically comprises: And executing feature decomposition on the covariance matrix, and solving to obtain a feature value and a corresponding feature vector, wherein each component in the feature vector is the load of the corresponding pollution factor in the main component.
3. The method for tracing groundwater pollution in a production enterprise according to claim 2, wherein the step S1 specifically comprises: And arranging the obtained characteristic values in a descending order, and calculating the proportion of each characteristic value to the sum of the total characteristic values to obtain the contribution rate.
4. The method for tracing groundwater pollution in a production enterprise according to claim 3, wherein the step S1 specifically comprises: And taking the pollution factors with the absolute load value exceeding the load threshold value as the main control pollution factors to be incorporated into the main control pollution factor set in the range of the reserved main components.
5. The method for tracing groundwater pollution in a production enterprise according to claim 4, wherein the step S1 specifically comprises: and multiplying the absolute value of the load of the main control pollution factor by the corresponding contribution rate, and then summing to obtain the comprehensive weight of the main control pollution factor.
6. The method for tracing groundwater pollution in a production enterprise according to claim 1, wherein the step S2 specifically comprises: and in the pollution source candidate area preliminary screening algorithm, calculating the correlation between the normalized concentration values of different pollution factors and Euclidean distances from the candidate pollution sources to the corresponding sampling points to obtain the concentration-distance correlation of the main control pollution factors.
7. The method for tracing groundwater pollution in a manufacturing enterprise according to claim 6, wherein the step S2 specifically comprises: And introducing comprehensive weights of the main control pollution factors based on the concentration-distance correlation of the main control pollution factors to obtain comprehensive scores, and incorporating the candidate pollution sources with the comprehensive scores exceeding the set correlation threshold into the pollution source candidate region.
8. The method for tracing groundwater pollution in a manufacturing enterprise according to claim 7, wherein the step S2 specifically comprises: in a steady-state weighted convection-dispersion point source joint inversion algorithm, taking the weighted error square sum between the original concentration value of the main control pollution factor at the sampling point and the theoretical predicted concentration as an objective function, and outputting the position coordinates and the source intensity of the candidate pollution source with the minimum objective function value based on the pollution source candidate region through iteration to obtain the position coordinates of the final pollution source.
9. The method for tracing groundwater pollution in a production enterprise according to claim 8, wherein the step S2 specifically comprises: In a steady-state weighted convection-diffusion point source joint inversion algorithm, a normalization factor and a convection-diffusion attenuation term are introduced based on the source intensity of a main control pollution factor, and theoretical prediction concentration is calculated.

Description

Underground water pollution tracing method for producing enterprises Technical Field The invention relates to the field of underground water pollution tracing, in particular to an underground water pollution tracing method in a production enterprise. Background With the rapid development of industrialization, towns and agriculture intensification, groundwater pollution problems have evolved from localized, sporadic events to global, systemic environmental crisis. In the production enterprises, especially chemical industry production enterprises, the production device is intricate and complex, the production facility equipment, pipelines and tank body are hidden, raw material storage, production operation, pipeline damage, ground cracking, waste treatment and the like can occur leakage or seepage, harmful substances enter a groundwater system, become one of main point sources of groundwater pollution, and characteristic pollutants discharged by the underground water system, such as heavy metals, organic chlorides, petroleum hydrocarbons, PFAS, perfluorinated compounds and the like, have the characteristics of strong concealment, long migration distance, obvious hysteresis effect and the like, and can be revealed in a downstream monitoring well only after entering the groundwater system often for years or even decades, so that the difficulty of pollution tracing is greatly increased. The traditional underground water pollution tracing method has the problems of low speed, high cost, low precision, complex procedure, point and surface taking and the like. Therefore, there is a need to provide a method for tracing groundwater pollution in a production enterprise, which shortens tracing time, improves tracing precision, and provides scientific basis for tracing and identifying pollution in the production enterprise. Disclosure of Invention The invention provides a method for tracing groundwater pollution in an enterprise, which aims to solve the problems that the conventional method directly analyzes all pollution factors, can not effectively shorten tracing time and improve tracing precision, and builds a multi-technology linkage pollution tracing technical mode of source identification-quantity detection-leakage point in the enterprise, and can not reduce environmental risks from the source and protect groundwater resource safety. The invention discloses a method for tracing groundwater pollution in enterprises, which comprises the following steps: S1, carrying out standardization treatment on the obtained original concentration values of different pollution factors to obtain concentration values standardized by the different pollution factors; performing principal component analysis based on concentration values standardized by different pollution factors, calculating a covariance matrix, performing characteristic decomposition, obtaining a load, and screening main control pollution factors; S2, based on concentration values standardized by different pollution factors, a pollution source candidate region primary screening algorithm is adopted to obtain a pollution source candidate region, and based on the pollution source candidate region, the position coordinates of the final pollution source are calculated through a steady-state weighting convection-dispersion point source joint inversion algorithm. Preferably, the S1 specifically includes: And executing feature decomposition on the covariance matrix, and solving to obtain a feature value and a corresponding feature vector, wherein each component in the feature vector is the load of the corresponding pollution factor in the main component. Preferably, the S1 specifically includes: And arranging the obtained characteristic values in a descending order, and calculating the proportion of each characteristic value to the sum of the total characteristic values to obtain the contribution rate. Preferably, the S1 specifically includes: And taking the pollution factors with the absolute load value exceeding the load threshold value as the main control pollution factors to be incorporated into the main control pollution factor set in the range of the reserved main components. Preferably, the S1 specifically includes: and multiplying the absolute value of the load of the main control pollution factor by the corresponding contribution rate, and then summing to obtain the comprehensive weight of the main control pollution factor. Preferably, the S2 specifically includes: and in the pollution source candidate area preliminary screening algorithm, calculating the correlation between the normalized concentration values of different pollution factors and Euclidean distances from the candidate pollution sources to the corresponding sampling points to obtain the concentration-distance correlation of the main control pollution factors. Preferably, the S2 specifically includes: And introducing comprehensive weights of the main control pollution factors based on the concentrati