A groundwater pollution early warning and tracing system and method

Abstract

The application discloses a groundwater pollution early warning and tracing system, comprising a sampling module, a detection module, a data analysis and tracing module and an early warning module; the sampling module is used for sucking groundwater at different depths; the detection module comprises a conventional detection module, a three-dimensional fluorescence spectrum detection module and an isotope detection module; the data analysis and tracing module comprises a conventional chemical index comparison module, a water quality fingerprint comparison module, an isotope comparison module and a control module; the control module is connected with the early warning module, and the early warning module sends pollution point information of the groundwater to preset receivers. The application further discloses a groundwater pollution early warning and tracing method. The conventional water chemical detection technology, the water quality fingerprint technology determined by the three-dimensional fluorescence spectrum and the isotope detection technology are combined, the accuracy of tracing is improved through multi-stage detection, and thus the accurate tracing and rapid early warning of groundwater pollution are realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of groundwater pollution tracing, and particularly relates to a groundwater pollution early warning tracing system and method. BACKGROUND

[0002] Groundwater pollution has the characteristic of concealment compared with surface water pollution. After pollution occurs, it is not easy to be found, and the pollutants often migrate far away with groundwater when found, and can easily cause adverse social impact. Controlling groundwater pollution not only emphasizes pollution remediation, but also should improve the ability to quickly find pollution and find the source of pollution as soon as possible to control the source and reduce the possible impact of pollution.

[0003] At present, the technologies for tracing groundwater pollution include water chemical characteristic technology, water quality fingerprint technology, isotope simulation technology, and numerical simulation technology. The numerical simulation technology needs manual correction of modeling and cannot realize automatic processing. The isotope technology has a relatively high cost and cannot be used as a method for daily detection of pollutants. Single water chemical characteristic technology or water quality fingerprint technology often cannot effectively trace the pollutants, and the tracing accuracy varies greatly according to the types of pollutants. At the same time, the current groundwater pollution tracing mostly uses only one of the above technologies, and a single tracing method often cannot achieve accurate tracing and early warning.

[0004] There are few patents of methods or devices for combining groundwater tracing and early warning. The Chinese patent (CN112505282A) proposes a method and system for implementing precise tracing and early warning of environmental water pollution, which compares daily water quality indicators, compares and analyzes the composition of characteristic pollutants, and locks the pollution source. However, a single tracing method often cannot achieve accurate early warning. The Chinese patent (CN111189815A) proposes to obtain water quality fingerprints by using Raman scattering spectrum, and to trace pollution according to the arrangement of characteristic peaks of target pollutants. The Chinese patent (CN109711674A) proposes to construct a lake and reservoir water tracing fingerprint spectrum, and to select determination indexes based on a pre-set index screening principle for water pollution tracing. Both of the two patents mainly focus on the application of water quality fingerprint method, and are also focused on the application method of single tracing technology, which cannot guarantee the accuracy of tracing.

[0005] Based on the above problems, the present application proposes a groundwater pollution early warning tracing system and method, which combines conventional water chemical detection technology, water quality fingerprint technology determined by three-dimensional fluorescence spectrum, and isotope detection technology to improve the accuracy of tracing through multi-level detection. SUMMARY

[0006] The purpose of the present application is to overcome the shortcomings of the prior art and provide a groundwater pollution early warning tracing system and method.

[0007] To achieve the above object, the present application adopts the following technical solutions:

[0008] The groundwater pollution early warning and tracing system comprises a sampling module, a detection module, a data analysis and tracing module, and an early warning module.

[0009] The sampling module is used to suck groundwater at different depths.

[0010] The detection module comprises a routine detection module for routine chemical detection of groundwater, a three-dimensional fluorescence spectrum detection module for water quality fingerprint detection of groundwater, and an isotope detection module for isotope detection of groundwater.

[0011] The data analysis and tracing module comprises a routine chemical index comparison module, a water quality fingerprint comparison module, an isotope comparison module, and a control module; the routine chemical index comparison module, the water quality fingerprint comparison module, and the isotope comparison module are connected to the control module.

[0012] The outlet of the sampling module is connected to the inlet of the routine detection module, the three-dimensional fluorescence spectrum detection module, and the isotope detection module, respectively.

[0013] The routine detection module, the three-dimensional fluorescence spectrum detection module, and the isotope detection module transmit detection results to the routine chemical index comparison module, the water quality fingerprint comparison module, and the isotope comparison module, respectively; the routine chemical index comparison module, the water quality fingerprint comparison module, and the isotope comparison module transmit comparison results to the control module.

[0014] The control module controls the opening and closing of each inlet and outlet of the routine detection module, the three-dimensional fluorescence spectrum detection module, and the isotope detection module.

[0015] The control module is connected to the early warning module, and the early warning module sends pollution point information of the groundwater to a preset recipient.

[0016] Preferably, the sampling module comprises a sampler capable of sucking groundwater at different depths.

[0017] Preferably, the outlet end of the sampler is provided with a filter module.

[0018] Preferably, the routine chemical detection of the routine detection module comprises routine detection and optional detection.

[0019] Preferably, the routine detection comprises 17 detections, i.e., detection of pH value, total hardness, dissolved total solids, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, volatile phenol, total cyanide, permanganate index, fluoride, arsenic, mercury, cadmium, hexavalent chromium, iron, manganese, and coliform group.

[0020] Preferably, the optional detection includes detection of chloride, sulfate, bicarbonate, petroleum, total bacteria, selenium, beryllium, barium, nickel, total alpha radioactivity, total beta radioactivity, lead, copper, zinc, and anionic surfactants.

[0021] Preferably, the isotopic detection module detects isotopes including C, N, and Pb.

[0022] Preferably, the conventional chemical index comparison module performs index change analysis and correlation analysis on the received conventional chemical indexes of the groundwater and the daily water sample chemical indexes.

[0023] Preferably, the index change analysis is to calculate an index change rate, which is a ratio of a change value of each conventional chemical index of the groundwater to a corresponding chemical index of the daily water sample, and the change value of each conventional chemical index of the groundwater is an absolute value of a difference between each conventional chemical index of the groundwater and the corresponding chemical index of the daily water sample.

[0024] Preferably, the water quality fingerprint comparison module includes an image processing module capable of comparing water quality fingerprint images and obtaining image similarity, a conventional water sample water quality fingerprint library, and a water quality fingerprint library of sewage discharged by each surrounding enterprise.

[0025] Preferably, the isotopic comparison module includes a data comparison module capable of finding a numerical interval of an isotopic ratio, a database of C / N isotopic ratios of sewage of each surrounding enterprise, and databases of atmospheric C / N / Pb isotopic ratios, leachate C / N / Pb isotopic ratios, and pesticide C / N / Pb isotopic ratios.

[0026] Preferably, each inlet and outlet of the conventional detection module, the three-dimensional fluorescence spectrum detection module, and the isotopic detection module is provided with an electromagnetic valve.

[0027] The control module is connected to each electromagnetic valve.

[0028] The application also provides a groundwater pollution early warning and tracing method.

[0029] A groundwater pollution early warning and tracing method includes the following steps:

[0030] Step 1: The sampling module starts to suck a groundwater sample.

[0031] Step 2: The electromagnetic valve at the inlet of the conventional detection module is opened, and the sampling module sends the sucked groundwater sample to the conventional detection module.

[0032] Step 3: The routine detection module detects the routine chemical indicators of the groundwater sample and transmits the detection results to the routine chemical indicator comparison module; after the routine detection module completes the detection, the control module controls the electromagnetic valve at the inlet of the routine detection module to close and the electromagnetic valve at the outlet to open, and the groundwater sample is discharged;

[0033] Step 4: The routine chemical indicator comparison module analyzes the received routine chemical indicators of the groundwater and the routine water sample chemical indicators for indicator change and correlation, and transmits the analysis results to the control module;

[0034] When the indicator change analysis is no obvious change and the correlation analysis is not less than 70%, the detection is completed and there is no warning;

[0035] When the indicator change analysis is obvious change or the correlation analysis is less than 70%, steps 5-7 are performed;

[0036] Step 5: The control module controls the sampling module to start and the electromagnetic valve at the inlet of the three-dimensional fluorescence spectrum detection module to open; the sampling module sends the groundwater sample sucked to the three-dimensional fluorescence spectrum detection module;

[0037] Step 6: The three-dimensional fluorescence spectrum detection module detects the water quality fingerprint of the groundwater sample and transmits the detection results to the water quality fingerprint comparison module; after the three-dimensional fluorescence spectrum detection module completes the detection, the control module controls the electromagnetic valve at the inlet of the three-dimensional fluorescence spectrum detection module to close and the electromagnetic valve at the outlet to open, and the groundwater sample is discharged;

[0038] Step 7: The image processing module of the water quality fingerprint comparison module compares the received water quality fingerprint of the groundwater sample with the routine water sample water quality fingerprint library and obtains the image similarity, and transmits the comparison results to the control module;

[0039] When the similarity of the water quality fingerprint of the groundwater sample and the routine water sample water quality fingerprint library is not less than 80%, the detection is completed and there is no warning;

[0040] When the similarity of the water quality fingerprint of the groundwater sample and the routine water sample water quality fingerprint library is less than 80%, the image processing module compares the received water quality fingerprint of the groundwater sample with the water quality fingerprint library of the sewage of each enterprise in turn, and transmits the comparison results to the control module;

[0041] When the similarity of the water quality fingerprint of the groundwater sample and the water quality fingerprint library of the sewage of one of the enterprises is not less than 80%, the enterprise is determined as the pollution source enterprise; the control module controls the warning module to send the pollution point information of the groundwater to the preset receiver;

[0042] When the similarity of the water quality fingerprint of the groundwater sample to the water quality fingerprint database of all surrounding enterprise sewage is less than 80%, steps 8-10 are performed;

[0043] Step 8: The control module controls the sampling module to start and the electromagnetic valve at the inlet of the isotope detection module to open; the sampling module sends the groundwater sample sucked to the isotope detection module;

[0044] Step 9: The isotope detection module performs isotope ratio determination on the groundwater sample and transmits the detection result to the isotope comparison module; after the isotope detection module completes the detection, the control module controls the electromagnetic valve at the inlet of the isotope detection module to close and the electromagnetic valve at the outlet to open, and the groundwater sample is discharged;

[0045] Step 10: The data comparison module compares each isotope ratio of the received groundwater sample with the atmospheric C / N / Pb isotope ratio database, the leachate C / N / Pb isotope ratio database, the pesticide C / N / Pb isotope ratio database and the sewage C / N isotope ratio database of each surrounding enterprise respectively, and transmits the comparison result to the control module;

[0046] When the isotope ratio of the groundwater sample is within the range of the corresponding isotope ratio of the isotope ratio database of one enterprise, the enterprise is determined as the pollution source enterprise; the control module controls the early warning module to send the pollution point information of the groundwater to the preset receiver;

[0047] When the isotope ratio of the groundwater sample is within the range of the corresponding isotope ratio of the atmospheric or leachate or pesticide isotope ratio database, the atmospheric or leachate or pesticide is determined as the pollution source; the control module controls the early warning module to send the pollution point information of the groundwater to the preset receiver.

[0048] Preferably, in step 4, the index change analysis without obvious change means that the index change rate of any conventional chemical index of the groundwater is less than 0.1;

[0049] The index change analysis with obvious change means that the index change rate of at least one conventional chemical index of the groundwater is not less than 0.1.

[0050] The beneficial effects of the present application are:

[0051] The present application combines conventional water chemical detection technology, water quality fingerprint technology of three-dimensional fluorescence spectrum determination and isotope detection technology, improves the accuracy of tracing through multi-stage detection, and thus realizes accurate tracing and rapid early warning of groundwater pollution. BRIEF DESCRIPTION OF DRAWINGS

[0052] The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification, the illustrations of the exemplary embodiments of the application and to explain them, not to limit the application.

[0053] Figure 1 is a structural schematic diagram of the groundwater pollution early warning and tracing system of the application;

[0054] Figure 2 is a module schematic diagram of the water quality fingerprint comparison module in the application;

[0055] Figure 3 is a module schematic diagram of the isotope comparison module in the application;

[0056] Among them:

[0057] 1 - sampling module, 11 - sampler, 12 - filtering module;

[0058] 2 - detection module, 21 - conventional detection module, 22 - three-dimensional fluorescence spectrum detection module, 23 - isotope detection module;

[0059] 3 - data analysis and tracing module, 31 - conventional chemical index comparison module, 32 - water quality fingerprint comparison module, 321 - image processing module, 322 - conventional water sample water quality fingerprint library, 323 - water quality fingerprint library of sewage, 33 - isotope comparison module, 331 - data comparison module, 332 - atmospheric C / N / Pb isotope ratio database, 333 - leachate C / N / Pb isotope ratio database, 334 - pesticide C / N / Pb isotope ratio database, 335 - sewage C / N isotope ratio database, 34 - control module, 4 - early warning module. DETAILED DESCRIPTION

[0060] It should be noted that the following detailed description is illustrative only and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0061] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "comprise" and / or "include" are used in this specification, they mean that there is a feature, step, operation, device, component and / or combination thereof.

[0062] In this invention, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely relational terms determined for the convenience of describing the structural relationship of the various components or elements of this invention, and do not specifically refer to any component or element in this invention, and should not be construed as limiting this invention.

[0063] In this invention, terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0064] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0065] like Figure 1 As shown, a groundwater pollution early warning and tracing system includes a sampling module 1, a detection module 2, a data analysis and tracing module 3, and an early warning module 4.

[0066] The sampling module 1 is used to collect groundwater at different depths. In this application, the sampling module 1 can sample groundwater at different depths, typically at the following three depths: the first depth is 5cm below the water surface, the second depth is 50cm below the water surface, and the third depth is 20cm above the bottom. If the bottom depth is too large, the third depth can be sampled at 5m below the water surface. The sampling capacity of the sampling module 1 ranges from 5 to 1000mL. If an anomaly is detected in groundwater samples taken at any depth at the same location, it is considered that the groundwater at that location is abnormal.

[0067] The detection module 2 includes a conventional detection module 21 for routine chemical detection of groundwater, a three-dimensional fluorescence spectroscopy detection module 22 for water quality fingerprint detection of groundwater, and an isotope detection module 23 for isotope detection of groundwater.

[0068] The data analysis and tracing module 3 includes a conventional chemical index comparison module 31, a water quality fingerprint comparison module 32, an isotope comparison module 33, and a control module 34; the conventional chemical index comparison module 31, the water quality fingerprint comparison module 32, and the isotope comparison module 33 are all connected to the control module 34.

[0069] The outlet of the sampling module 1 is connected to the inlet of the conventional detection module 21, the three-dimensional fluorescence spectroscopy detection module 22, and the isotope detection module 23, respectively.

[0070] The routine detection module 21, the three-dimensional fluorescence spectrum detection module 22 and the isotope detection module 23 respectively transmit the detection results to the routine chemical index comparison module 31, the water quality fingerprint comparison module 32 and the isotope comparison module 33; the routine chemical index comparison module 31, the water quality fingerprint comparison module 32 and the isotope comparison module 33 transmit the comparison results to the control module 34.

[0071] The control module 34 controls the opening or closing of each inlet and outlet in the routine detection module 21, the three-dimensional fluorescence spectrum detection module 22 and the isotope detection module 23; in particular, the control module 34 controls the sampling and sample feeding of the sampling module 1.

[0072] The control module 34 is connected with the early warning module 4, and the early warning module 4 sends the pollution point information of the underground water to a preset recipient; in particular, the early warning module 4 can send the pollution point information of the underground water to the preset recipient in the form of a short message.

[0073] Preferably, the sampling module 1 comprises a sampler 11 capable of sucking underground water at different depths.

[0074] Preferably, the outlet end of the sampler 11 is provided with a filter module 12 to filter the solid or flocculent impurities in the underground water sucked by the sampler 11, facilitating subsequent detection.

[0075] Preferably, the routine chemical detection of the routine detection module 21 comprises routine detection and optional detection.

[0076] Preferably, the routine detection comprises 17 detections, i.e. the detections of pH value, total hardness, dissolved total solids, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, volatile phenol, total cyanide, permanganate index, fluoride, arsenic, mercury, cadmium, hexavalent chromium, iron, manganese and coliform group.

[0077] Preferably, the optional detection comprises the detections of chloride, sulfate, bicarbonate, petroleum, total number of bacteria, selenium, beryllium, barium, nickel, total alpha radioactivity, total beta radioactivity, lead, copper, zinc and anionic surfactant.

[0078] Preferably, the isotopes detected by the isotope detection module include C, N and Pb.

[0079] Preferably, the routine chemical index comparison module 31 performs index change analysis and correlation analysis on the received routine chemical indexes of the underground water and the daily water sample chemical indexes.

[0080] Preferably, the index change analysis is to calculate the index change rate, which is the ratio of the change value of each conventional chemical index of the groundwater to the corresponding chemical index of the daily water sample, and the change value of each conventional chemical index of the groundwater is the absolute value of the difference between the conventional chemical index of the groundwater and the corresponding chemical index of the daily water sample.

[0081] The correlation analysis is to analyze and calculate the correlation between the conventional chemical index of the groundwater and the numerical change of the conventional chemical index of the daily water sample, and the similarity between two or more groups of data can be obtained. The correlation analysis of the conventional chemical index of the water sample is a prior art, and its specific method will not be described here. It is usually performed by using SPSS statistical analysis software.

[0082] Preferably, as shown in Figure 2 The water quality fingerprint comparison module 32 includes an image processing module 321 capable of comparing water quality fingerprint images and obtaining image similarity, a conventional water sample water quality fingerprint library 322, and a water quality fingerprint library 323 of sewage discharged by each surrounding enterprise.

[0083] Preferably, as shown in Figure 3 The isotope comparison module 33 includes a data comparison module 331 capable of finding the numerical interval of the isotope ratio, a sewage C / N isotope ratio database 335 of each surrounding enterprise, an atmospheric C / N / Pb isotope ratio database 332, a leachate C / N / Pb isotope ratio database 333, and a pesticide C / N / Pb isotope ratio database 334.

[0084] Preferably, each inlet and outlet of the conventional detection module 21, the three-dimensional fluorescence spectrum detection module 22, and the isotope detection module 23 is provided with an electromagnetic valve;

[0085] The control module 34 is connected with each electromagnetic valve.

[0086] A groundwater pollution early warning and tracing method, comprising the following steps:

[0087] Step 1: The sampling module 1 starts to suck the groundwater sample;

[0088] Step 2: The electromagnetic valve at the inlet of the conventional detection module 21 is opened, and the sampling module 1 sends the sucked groundwater sample to the conventional detection module 21;

[0089] Step 3: The conventional detection module 21 detects the conventional chemical index of the groundwater sample and transmits the detection result to the conventional chemical index comparison module 31. After the detection of the conventional detection module 21 is completed, the control module 34 controls the electromagnetic valve at the inlet of the conventional detection module 21 to be closed and the electromagnetic valve at the outlet to be opened, and the groundwater sample is discharged;

[0090] Step 4: The received routine chemical indicators of the groundwater are compared with the routine water sample chemical indicators by the routine chemical indicator comparison module 31 for index change analysis and correlation analysis, and the analysis results are transmitted to the control module 34;

[0091] When the index change analysis is no obvious change and the correlation analysis is not less than 70%, the detection is completed and there is no warning;

[0092] When the index change analysis is obvious change or the correlation analysis is less than 70%, steps 5-7 are performed;

[0093] Preferably, in step 4, the index change analysis of no obvious change means that the index change rate of any routine chemical indicator of the groundwater is less than 0.1;

[0094] The index change analysis of obvious change means that the index change rate of at least one routine chemical indicator of the groundwater is not less than 0.1.

[0095] Step 5: The control module 34 controls the sampling module 1 to start and the electromagnetic valve at the inlet of the three-dimensional fluorescence spectrum detection module 22 to open; the sampling module 1 sends the groundwater sample sucked to the three-dimensional fluorescence spectrum detection module 22;

[0096] Step 6: The three-dimensional fluorescence spectrum detection module 22 performs water quality fingerprint detection on the groundwater sample and transmits the detection results to the water quality fingerprint comparison module 32; after the detection of the three-dimensional fluorescence spectrum detection module 22 is completed, the control module 34 controls the electromagnetic valve at the inlet of the three-dimensional fluorescence spectrum detection module 22 to close and the electromagnetic valve at the outlet to open, and the groundwater sample is discharged;

[0097] Step 7: The image processing module 321 of the water quality fingerprint comparison module 32 compares the received water quality fingerprint of the groundwater sample with the routine water sample water quality fingerprint library 322 and obtains the image similarity, and transmits the comparison results to the control module 34;

[0098] When the similarity of the water quality fingerprint of the groundwater sample and the routine water sample water quality fingerprint library 322 is not less than 80%, the detection is completed and there is no warning;

[0099] When the similarity of the water quality fingerprint of the groundwater sample and the routine water sample water quality fingerprint library 322 is less than 80%, the image processing module 321 compares the received water quality fingerprint of the groundwater sample with the water quality fingerprint library 323 of the sewage of each enterprise in turn, and transmits the comparison results to the control module 34;

[0100] When the water quality fingerprint of the groundwater sample is not less than 80% similar to the water quality fingerprint of one of the enterprise sewage, the enterprise is determined as the pollution source enterprise; the control module 34 controls the early warning module 4 to send the pollution point information of the groundwater to the preset recipient; wherein the pollution point information of the groundwater includes the pollution type, the pollution point position and the pollution source enterprise;

[0101] When the water quality fingerprint of the groundwater sample is less than 80% similar to the water quality fingerprint of all the surrounding enterprises, steps 8-10 are performed;

[0102] Step 8: the control module 34 controls the sampling module 1 to start, and the electromagnetic valve at the inlet of the isotope detection module 23 is opened; the sampling module 1 sends the groundwater sample to the isotope detection module 23;

[0103] Step 9: the isotope detection module 23 performs isotope ratio determination on the groundwater sample, and transmits the detection result to the isotope comparison module 33; after the isotope detection module 23 completes the detection, the control module 34 controls the electromagnetic valve at the inlet of the isotope detection module 23 to be closed and the electromagnetic valve at the outlet to be opened, and the groundwater sample is discharged;

[0104] Step 10: the data comparison module 331 compares each isotope ratio of the received groundwater sample with the atmospheric C / N / Pb isotope ratio database, the leachate C / N / Pb isotope ratio database, the pesticide C / N / Pb isotope ratio database and the sewage C / N isotope ratio database of each surrounding enterprise respectively, and transmits the comparison result to the control module 34;

[0105] When the isotope ratio of the groundwater sample is within the range of the corresponding isotope ratio of the isotope ratio database of one of the enterprises, the enterprise is determined as the pollution source enterprise; the control module 34 controls the early warning module 4 to send the pollution point information of the groundwater to the preset recipient;

[0106] When the isotope ratio of the groundwater sample is within the range of the corresponding isotope ratio of the atmospheric or leachate or pesticide isotope ratio database, the atmospheric or leachate or pesticide is determined as the pollution source; the control module 34 controls the early warning module 4 to send the pollution point information of the groundwater to the preset recipient.

[0107] The following is a specific embodiment.

[0108] Embodiment 1:

[0109] The sampling frequency of the sampling module 1 is set to 12h / time, and is arranged in a certain monitoring well for daily pollution detection.

[0110] At a certain time, the sampling module 1 collects 3 10mL samples at different depths of the monitoring well into the conventional detection module 21, and the conventional chemical index comparison module 31 performs correlation analysis on the received conventional chemical indexes of the underground water and the daily water sample chemical indexes. The result shows that the index change rate is less than 0.08, the correlation analysis is 85%, the water sample test is completed, the underground water sample is discharged, and the detection is ended without warning.

[0111] Example 2:

[0112] The sampling frequency of the sampling module 1 is set to 12h / time, and is arranged in a certain monitoring well for daily pollution detection.

[0113] At a certain time, the sampling module 1 collects 3 10mL samples at different depths of the monitoring well into the conventional detection module 21, and the conventional chemical index comparison module 31 performs correlation analysis on the received conventional chemical indexes of the underground water and the daily water sample chemical indexes. The result shows that the index change rate is less than 0.08, the correlation analysis is 85%, the water sample test is completed, the underground water sample is discharged, and the detection is ended without warning.

[0114] The control module 34 controls the sampling module 1 to start again, and the sampling module 1 sends the underground water sample to the three-dimensional fluorescence spectrum detection module 22 for water quality fingerprint detection; the image processing module 321 of the water quality fingerprint comparison comparison module 32 compares the received water quality fingerprint of the underground water sample with the conventional water sample water quality fingerprint library 322, and obtains the similarity of the water quality fingerprint of the underground water sample and the conventional water sample water quality fingerprint library 322, which is 82%. The water sample test is completed, the underground water sample is discharged, and the detection is ended without warning.

[0115] Example 3:

[0116] The sampling frequency of the sampling module 1 is set to 24h / time, and is arranged in a certain monitoring well for daily pollution detection.

[0117] At a certain time, the sampling module 1 collects 3 10mL samples at different depths of the monitoring well into the conventional detection module 21, and the conventional chemical index comparison module 31 performs correlation analysis on the received conventional chemical indexes of the underground water and the daily water sample chemical indexes. The result shows that the index change rate is less than 0.08, the correlation analysis is 85%, the water sample test is completed, the underground water sample is discharged, and the detection is ended without warning.

[0118] The control module 34 controls the sampling module 1 to start again, and the sampling module 1 sends the underground water sample sucked to the three-dimensional fluorescence spectrum detection module 22 for water quality fingerprint detection; the image processing module 321 of the water quality fingerprint comparison and comparison module 32 compares the water quality fingerprint of the received underground water sample with the water quality fingerprint library 322 of the conventional water sample, and obtains that the similarity of the water quality fingerprint of the underground water sample and the water quality fingerprint library 322 of the conventional water sample is 52%; the image processing module 321 compares the water quality fingerprint of the received underground water sample with the water quality fingerprint library 325 of the sewage of each enterprise in turn, and obtains that the similarity of the water quality fingerprint of the underground water sample and the water quality fingerprint library 325 of the sewage of one of the enterprises is 82%, and the enterprise is determined as the pollution source enterprise, the underground water sample is discharged after the water sample test, and the pollution point information of the underground water is sent to the preset receiver by the early warning device.

[0119] Example 4:

[0120] The sampling frequency of the sampling module 1 is set to 24h / time, and is arranged in a certain monitoring well for daily pollution detection.

[0121] At a certain time, the sampling module 1 collects three 10mL samples at different depths of the monitoring well into the conventional detection module 21, and the conventional chemical index comparison module 31 performs correlation analysis on the received conventional chemical index of the underground water and the daily water sample chemical index, and finds that the ammonia nitrogen content is obviously increased, the index change rate of the ammonia nitrogen is 0.34, the correlation analysis shows that the correlation analysis with the daily water sample chemical index is 50%, and the underground water sample is discharged after the water sample test;

[0122] The control module 34 controls the sampling module 1 to start again, and the sampling module 1 sends the underground water sample sucked to the three-dimensional fluorescence spectrum detection module 22 for water quality fingerprint detection; the image processing module 321 of the water quality fingerprint comparison and comparison module 32 compares the water quality fingerprint of the received underground water sample with the water quality fingerprint library 322 of the conventional water sample, and obtains that the similarity of the water quality fingerprint of the underground water sample and the water quality fingerprint library 322 of the conventional water sample is 52%; the image processing module 321 compares the water quality fingerprint of the received underground water sample with the water quality fingerprint library 325 of the sewage of each enterprise in turn, and obtains that the similarity of the water quality fingerprint of the underground water sample and the water quality fingerprint library 325 of the sewage of one of the enterprises is 82%, and the enterprise is determined as the pollution source enterprise, the underground water sample is discharged after the water sample test, and the pollution point information of the underground water is sent to the preset receiver by the early warning device.

[0123] The control module 34 controls the sampling module 1 to start again, and the sampling module 1 sends the underground water sample sucked to the isotope detection module 22 for isotope ratio determination. The C isotope ratio is determined to be -23‰. The data comparison module 331 compares the C isotope ratio in the sample with the database of C / N / Pb isotope ratios of the atmosphere, leachate, pesticide, and the database of C / N isotope ratios of the sewage of the surrounding enterprises. The result shows that the C isotope ratio of the sewage of the enterprise is in the range of -22‰ to -24‰, and the pollutant is found to come from the enterprise.

[0124] After the water sample test, the underground water sample is discharged, and the pollution point information of the underground water is sent to the preset receiver by the early warning device.

[0125] Example 5

[0126] The sampling frequency of the sampling module 1 is set to 18h / time, and the sampling module 1 is arranged in a monitoring well for daily pollution detection.

[0127] At a certain time, the sampling module 1 collects three 7mL samples at different depths of the monitoring well into the conventional detection module 21. The conventional chemical index comparison module 31 compares the received conventional chemical index of the underground water with the daily water sample chemical index, and finds that the ammonia nitrogen content is obviously increased, the index change rate of the ammonia nitrogen is 0.31, the correlation analysis shows that the correlation with the daily water sample chemical index is 40%, and the water sample test is completed.

[0128] The control module 34 controls the sampling module 1 to start again, and the sampling module 1 sends the underground water sample sucked to the three-dimensional fluorescence spectrum detection module 22 for water quality fingerprint detection. The image processing module 321 of the water quality fingerprint comparison comparison module 32 compares the received water quality fingerprint of the underground water sample with the conventional water sample water quality fingerprint library 322, and obtains the similarity of the water quality fingerprint of the underground water sample with the conventional water sample water quality fingerprint library 322, which is 52%. The image processing module 321 compares the received water quality fingerprint of the underground water sample with the water quality fingerprint library 325 of the sewage of each enterprise in turn, and obtains the maximum similarity of the water quality fingerprint of the underground water sample with the water quality fingerprint library 325 of the sewage of the surrounding enterprises, which is 40%. The water sample test is completed, and the underground water sample is discharged.

[0129] The control module 34 controls the sampling module 1 to start again, the sampling module 1 sends the underground water sample sucked to the isotopic detection module 22 to carry out isotopic ratio determination, the C isotopic ratio is determined as -27‰, and the N isotopic ratio is 0.2‰; the data comparison module 331 compares the C isotopic ratio and the N isotopic ratio in the sample with the database of C / N / Pb isotopic ratios of the atmosphere, the leachate and the pesticide and the database of the sewage C / N isotopic ratios of the surrounding enterprises and the data comparison module, and the result shows that the C sewage isotopic ratio of the certain fertilizer enterprise is in the range of -22‰--24‰, the N isotopic ratio of the surrounding leachate is -4.2‰-1.2‰, and comparison shows that the pollutant is derived from the surrounding leachate;

[0130] The water sample test is completed, the underground water sample is discharged, and the pollution point information of the underground water is sent to a preset receiver by the early warning device.

[0131] Although the specific embodiments of the present application are described above with reference to the drawings, the present application is not limited to the above description, and those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the present application without creative labor are still within the protection scope of the present application.

Claims

1. A groundwater pollution early warning and tracing system, characterized in that, The system comprises a sampling module, a detection module, a data analysis and tracing module, and an early warning module. The sampling module is used to suck underground water at different depths. The detection module comprises a routine detection module for routine chemical detection of underground water, a three-dimensional fluorescence spectrum detection module for water quality fingerprint detection of underground water, and an isotope detection module for isotope detection of underground water. The data analysis and tracing module comprises a routine chemical index comparison module, a water quality fingerprint comparison module, an isotope comparison module, and a control module. The outlet of the sampling module is connected to the inlet of the routine detection module, the three-dimensional fluorescence spectrum detection module, and the isotope detection module. The routine detection module, the three-dimensional fluorescence spectrum detection module, and the isotope detection module transmit detection results to the routine chemical index comparison module, the water quality fingerprint comparison module, and the isotope comparison module, respectively. The control module controls the opening and closing of the inlets and outlets of the routine detection module, the three-dimensional fluorescence spectrum detection module, and the isotope detection module. The control module is connected to the early warning module, which sends pollution point information of underground water to a preset recipient. The isotope detection module detects isotopes including C, N, and Pb. The routine chemical index comparison module analyzes index changes and correlation of received routine chemical indexes of underground water and daily water sample chemical indexes. The water quality fingerprint comparison module comprises an image processing module capable of comparing water quality fingerprint images and obtaining image similarity, a routine water sample water quality fingerprint library, and water quality fingerprint libraries of sewage discharged by surrounding enterprises. The isotope comparison module comprises a data comparison module capable of finding a numerical interval of isotope ratios, a C / N isotope ratio database of sewage of surrounding enterprises, and atmospheric C / N / Pb isotope ratio databases, leachate C / N / Pb isotope ratio databases, and pesticide C / N / Pb isotope ratio databases. Each inlet and outlet of the routine detection module, the three-dimensional fluorescence spectrum detection module, and the isotope detection module is provided with an electromagnetic valve. The control module is connected to each electromagnetic valve.

2. The groundwater pollution early warning and tracing system of claim 1, wherein, The sampling module comprises a sampler capable of sucking underground water at different depths.

3. The groundwater pollution early warning and tracing system of claim 2, wherein, The outlet of the sampler is provided with a filter module.

4. The groundwater pollution early warning and tracing system of claim 1, wherein, The routine chemical detection of the routine detection module comprises routine detection and optional detection.

5. The groundwater pollution early warning and tracing system of claim 4, wherein, The routine detection comprises 17 detections, i.e., detection of pH value, total hardness, dissolved total solids, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, volatile phenol, total cyanide, permanganate index, fluoride, arsenic, mercury, cadmium, hexavalent chromium, iron, manganese, and coliform group.

6. The groundwater pollution early warning and tracing system of claim 4, wherein, The optional detection comprises detection of chloride, sulfate, bicarbonate, petroleum, total bacteria, selenium, beryllium, barium, nickel, total alpha radioactivity, total beta radioactivity, lead, copper, zinc, and anionic surfactant.

7. The groundwater pollution early warning and tracing system of claim 1, wherein, The index change analysis is to calculate an index change rate, which is a ratio of a change value of each conventional chemical index of the groundwater to a corresponding chemical index of the daily water sample, and the change value of each conventional chemical index of the groundwater is an absolute value of a difference between each conventional chemical index of the groundwater and the corresponding chemical index of the daily water sample.

8. A groundwater pollution early warning and tracing method, characterized in that, The underground water pollution early warning and tracing system based on any one of claims 1-7 is implemented, including the following steps: Step 1: the sampling module starts to suck the groundwater sample; Step 2: the electromagnetic valve at the entrance of the conventional detection module is opened, and the sampling module sends the sucked groundwater sample to the conventional detection module; Step 3: the conventional detection module detects the conventional chemical indexes of the groundwater sample and transmits the detection results to the conventional chemical index comparison module; after the detection of the conventional detection module is completed, the control module controls the electromagnetic valve at the entrance of the conventional detection module to be closed and the electromagnetic valve at the outlet to be opened, and the groundwater sample is discharged; Step 4: the conventional chemical index comparison module performs index change analysis and correlation analysis on the received conventional chemical indexes of the groundwater and the chemical indexes of the daily water sample, and transmits the analysis results to the control module; When the index change analysis is no obvious change and the correlation analysis is not less than 70%, the detection is completed and there is no early warning; When the index change analysis is obvious change or the correlation analysis is less than 70%, steps 5-7 are performed; Step 5: the control module controls the sampling module to start and the electromagnetic valve at the entrance of the three-dimensional fluorescence spectrum detection module to be opened; the sampling module sends the sucked groundwater sample to the three-dimensional fluorescence spectrum detection module; Step 6: the three-dimensional fluorescence spectrum detection module detects the water quality fingerprint of the groundwater sample and transmits the detection results to the water quality fingerprint comparison module; after the detection of the three-dimensional fluorescence spectrum detection module is completed, the control module controls the electromagnetic valve at the entrance of the three-dimensional fluorescence spectrum detection module to be closed and the electromagnetic valve at the outlet to be opened, and the groundwater sample is discharged; Step 7: the image processing module of the water quality fingerprint comparison module compares the received water quality fingerprint of the groundwater sample with the conventional water sample water quality fingerprint library and obtains the image similarity, and transmits the comparison results to the control module; When the similarity of the water quality fingerprint of the groundwater sample and the conventional water sample water quality fingerprint library is not less than 80%, the detection is completed and there is no early warning; When the similarity of the water quality fingerprint of the groundwater sample and the conventional water sample water quality fingerprint library is less than 80%, the image processing module compares the received water quality fingerprint of the groundwater sample with the water quality fingerprint libraries of the sewage of each enterprise in turn, and transmits the comparison results to the control module; When the similarity of the water quality fingerprint of the groundwater sample and the water quality fingerprint library of the sewage of one of the enterprises is not less than 80%, the enterprise is determined as the pollution source enterprise; the control module controls the early warning module to send the pollution point information of the groundwater to the preset receiver; When the similarity of the water quality fingerprint of the groundwater sample and the water quality fingerprint libraries of the sewage of all the surrounding enterprises is less than 80%, steps 8-10 are performed; Step 8: the control module controls the sampling module to start and the electromagnetic valve at the entrance of the isotope detection module to be opened; the sampling module sends the sucked groundwater sample to the isotope detection module; Step 9: The isotopic detection module performs isotopic ratio measurement on the groundwater sample, and transmits the detection result to the isotopic comparison module; after the isotopic detection module completes the detection, the control module controls the electromagnetic valve at the inlet of the isotopic detection module to close and the electromagnetic valve at the outlet to open, and the groundwater sample is discharged; Step 10: The data comparison module compares each isotopic ratio of the received groundwater sample with the atmospheric C / N / Pb isotopic ratio database, the leachate C / N / Pb isotopic ratio database, the pesticide C / N / Pb isotopic ratio database, and the sewage C / N isotopic ratio database of each surrounding enterprise respectively, and transmits the comparison result to the control module; When the isotopic ratio of the groundwater sample is within the range of the corresponding isotopic ratio of the isotopic ratio database of one of the enterprises, the enterprise is determined as the pollution source enterprise; the control module controls the early warning module to send the pollution point information of the groundwater to the preset receiver; When the isotopic ratio of the groundwater sample is within the range of the corresponding isotopic ratio of the atmospheric or leachate or pesticide isotopic ratio database, the atmospheric or leachate or pesticide is determined as the pollution source; the control module controls the early warning module to send the pollution point information of the groundwater to the preset receiver.

9. The groundwater pollution early warning and tracing method of claim 8, wherein, In step 4, the index change analysis without obvious change means that the index change rate of any conventional chemical index of the groundwater is less than 0.1; The index change analysis with obvious change means that the index change rate of at least one conventional chemical index of the groundwater is not less than 0.1.

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