CN-120766799-B - Isotope-based method and system for tracing and analyzing organic pollution of underground water

CN120766799BCN 120766799 BCN120766799 BCN 120766799BCN-120766799-B

Abstract

The invention relates to an isotope-based method and system for analyzing organic pollution of groundwater, wherein the method comprises the steps of collecting pollutant parameters of monitoring points at a plurality of time intervals, constructing a target monitoring point set, enabling a coverage area of the target monitoring point set to be called a target area, finding and analyzing the pollutant parameters of each monitoring point in the target monitoring point set based on typical time intervals to obtain contour lines corresponding to pollutant parameter types, taking areas in the contour lines corresponding to high pollutant parameters of each pollutant type as suspected areas, and determining target pollution sources in the suspected areas based on the isotope parameters. According to the invention, large data monitoring resources are fully utilized in space and time, pollutant parameters are combined, isotope analysis resources are optimally utilized, and tracking and guiding of pollution sources are performed, so that efficient multi-source burst differentiated pollutant tracing is provided.

Inventors

WU XIAOFANG
HU QIANG
CAI LINYING
LI HAISHENG
ZHU GANGHUI
LIU YI
LUO JINGTIAN
HAN QIAOCHU
LI GANG
LI JIA
LIU XIAOYU

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: 20260508
Application Date: 20250623

Claims (10)

1. The method for tracing and analyzing the organic pollution of the underground water based on the isotopes is characterized by comprising the following steps: s1, collecting pollutant parameters of a monitoring point i in T time intervals, wherein T is a time interval number; step S2, constructing a target monitoring point set cls, wherein the coverage area is called a target area; step S3, discovering and analyzing the pollutant parameters of each monitoring point in the target monitoring point set based on the typical time interval to obtain a contour line corresponding to the pollutant parameter type, wherein the method specifically comprises the following steps: step S30, calculating a parameter gradient mean value of a target monitoring point set for each pollutant parameter type k1, and taking a t value corresponding to the maximum parameter gradient mean value as a typical time interval tk1 corresponding to the pollutant parameter type k1; step S31, acquiring an unprocessed monitoring point i in a target monitoring point set, and executing steps S31-S35 for each pollutant parameter type k1 in sequence; step S32, determining the flow coverage range of the underground water flow data of the unprocessed monitoring points; Step S33, taking the monitoring point in the coverage area as a relative monitoring point ib of the monitoring point i; step S34, constructing an interpolation curve between each group of monitoring points i and the corresponding monitoring points ib based on a trigonometric function by using the groundwater pollutant parameters of the typical time interval tk1 corresponding to the pollutant parameter type k 1; Step S35, judging whether unprocessed monitoring points exist in the target monitoring point set, if so, returning to the step S31, otherwise, collectively calling the interpolation points and the monitoring points as parameter points; Step S36, determining a pollutant parameter contour corresponding to the pollutant type k1 based on the distribution condition of the parameter points in the target area; And S4, taking the region in the contour line corresponding to the high pollutant parameter of each pollutant type k1 as a suspected region, and determining a target pollution source in the suspected region based on the isotope parameter.
2. The method of isotope-based organic pollution traceability analysis of groundwater according to claim 1, wherein the T time intervals are consecutive time intervals.
3. The method for traceable analysis of organic pollution of groundwater based on isotopes according to claim 2, characterized in that it is started when the sudden pollutant exceeds standard, and after starting, continuous T2 samples are taken at a small time interval to obtain real-time monitoring data, and historical monitoring data obtained by continuous T1 samples at a large time interval are obtained, so as to form monitoring data of t=t1+t2 time intervals.
4. The method for traceable analysis of organic pollution of groundwater based on isotopes of claim 2, wherein T1 and T2 are preset values.
5. The isotope-based method for traceable analysis of organic pollution of groundwater according to claim 4, wherein T1 and T2 are determined based on sampling capability.
6. The method for traceable analysis of organic pollution of groundwater based on isotopes according to claim 5, wherein step S4 is specifically performed by using a region in the first contour line with the highest pollutant parameter as a suspected region, and determining a target pollution source from one or more pollution sources in the suspected region based on the isotope parameter.
7. The method according to claim 6, wherein the step S4 is performed for all contaminant types to determine a suspected area Ar k1 ;∪ k1 Ar k1 to be a final suspected area for which a target contaminant source is determined from one or more contaminant sources in the suspected area based on isotope parameters.
8. The method for traceable analysis of organic pollution of groundwater based on isotopes according to claim 7, wherein when the first contour is closed, the area in the first contour is taken as a suspected area, otherwise, the area in the second contour corresponding to the second pollutant parameter is taken as a suspected area, the suspected area is narrowed down based on the degree of isotopic association to be taken as an updated suspected area, and the target pollution source is determined from the updated suspected area based on the isotopic parameter.
9. A server comprising a processor, a memory and a program disposed therein, which when run on the processor, causes the processor to perform the isotope-based method of traceability analysis of groundwater organic pollution of any one of claims 1-8.
10. An isotope-based system for traceable analysis of organic pollution of groundwater, which is used for implementing the isotope-based method for traceable analysis of organic pollution of groundwater according to any one of claims 1-8.

Description

Isotope-based method and system for tracing and analyzing organic pollution of underground water [ Field of technology ] The invention belongs to the field of big data traceability analysis, and particularly relates to an isotope-based method and system for traceability analysis of organic pollution of underground water. [ Background Art ] The drainage and infiltration of industrial and mining enterprises, agricultural production, resident domestic sewage and the like can deteriorate the quality of the underground water, and the problem of nitrogen pollution of the underground water is more serious. Particularly in some land type mixing areas, the underground water nitrogen pollution sources are complex, the pollution uncertainty and randomness are large, and the difficulty of the underground water pollution identification and control is increased. Unlike surface water pollution, groundwater is slow in flow, weak in alternation, poor in self-cleaning ability, difficult to recover once polluted, high in repair cost, and unlike surface water pollution, groundwater is slow in flow, weak in alternation, and poor in self-cleaning ability. Groundwater is a globally important fresh water resource, and its quality safety is directly related to ecosystem stability and human health. However, with the increasing industrialization and agricultural activities, groundwater pollution problems are becoming increasingly serious. The source of the pollutant is complex and various, including industrial wastewater leakage, non-point source pollution of pesticide and fertilizer, leachate of landfill sites and the like. The traditional monitoring means rely on manual sampling and laboratory analysis, have defects such as data update lag, insufficient space coverage and the like, and are difficult to capture sudden pollution events or trace pollution sources in time. For example, the fact that the concealed migration characteristics of contaminants may result in years before they are discovered, and that the cost of remediation has grown exponentially, highlights the urgent need for "prevention over remediation" in groundwater pollution management. Therefore, the prevention and control from the pollution source is of great significance. The analysis of the groundwater pollution source can provide important basic support for source prevention, control and repair work. Therefore, the prevention and control from the pollution source is of great significance. After the occurrence of the multi-source sudden pollution event, how to rapidly analyze, survey and evidence, determine the pollution source, and carry out pollutant tracing and early warning is the current hot spot research direction. The underground water pollution source is complex, and simple water chemistry analysis method or isotope technology alone is not enough to accurately reflect the pollution source. The traditional water chemistry analysis method or the qualitative judgment result according to the land utilization type has larger error and strong uncertainty, and the isotope characteristic values according to different pollution sources are relatively accurate in identification, but the isotope monitoring cost is relatively high, so that the method cannot be used for real-time monitoring and big data analysis, and because of the concealment and the dynamic property of groundwater flow, the method only depends on static data to carry out analysis tracing based on isotopes, so that great economic expenditure is caused, and only the traditional method needs a great time span for tracing, and the real-time accuracy is not strong. In addition, contaminants released at different times from the same source of contamination may cause differences in isotope ratios due to process variations. The time and place of the sudden groundwater pollution accident have great uncertainty, meanwhile, the mode and degree of hazard are difficult to determine, the normal operation of social life and production order is easy to cause, and serious pollution and damage are caused to water systems and ecological environment. Therefore, a method for improving the analysis accuracy of the pollution source is established, the pollution source is judged by combining the pollutant parameter and the isotope analysis in space and time, and the method has important significance for the accurate analysis of the pollution source. An effective and reliable pollution source tracing method needs to be found, the occurrence time and the position of a pollution source which causes sudden groundwater pollution are quickly and accurately found, and correct preventive measures and treatment schemes are made, so that the method is a technical problem to be solved; under the background, an intelligent monitoring system integrating big data and the Internet of things technology becomes a key path for breaking through the traditional bottleneck. The internet of things technology realizes minute-level continuous moni