CN116029884B - River pollution tracing method based on river channel water pollution tracing model - Google Patents
River pollution tracing method based on river channel water pollution tracing model Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000003911 water pollution Methods 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 69
- 239000010865 sewage Substances 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003344 environmental pollutant Substances 0.000 claims description 14
- 231100000719 pollutant Toxicity 0.000 claims description 14
- 238000011109 contamination Methods 0.000 claims description 13
- 230000001052 transient effect Effects 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 3
- BULVZWIRKLYCBC-UHFFFAOYSA-N phorate Chemical compound CCOP(=S)(OCC)SCSCC BULVZWIRKLYCBC-UHFFFAOYSA-N 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 2
- 238000013178 mathematical model Methods 0.000 abstract description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- 229910052698 phosphorus Inorganic materials 0.000 description 9
- 239000011574 phosphorus Substances 0.000 description 9
- 238000003903 river water pollution Methods 0.000 description 7
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 238000011835 investigation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
A river pollution tracing method based on a river channel water pollution tracing model belongs to the technical field of river water environment. The method comprises the steps of calibrating positions of pollution discharge enterprises, river monitoring points and sewage treatment plants through a geographic information system, constructing a mathematical model for reversely pushing pollution tracing at a time point when a pollution event occurs, accurately dividing the enterprises around the river into a plurality of categories (determining pollution sources: { enterprise sets }, suspected pollution sources }, to-be-examined pollution sources }, and according to the categories, { defaults to the sewage treatment plants, and after being examined, updating }); and by applying the model and combining the data collected by the river channel detection points, the instant pollution discharge or continuous pollution discharge condition of a pollution discharge enterprise is judged. The invention greatly shortens the time of law enforcement department to cope with pollution event through the construction of pollution tracing model.
Description
Technical Field
The invention belongs to the technical field of river water environments, and particularly relates to a river pollution tracing method based on a river water pollution tracing model.
Background
Along with the continuous acceleration of industrialization and urban treatment, environmental problems are increasingly prominent, and especially water environment pollution becomes an important limiting factor for sustainable development of rivers. Because the pollution sources of the river water quality are numerous, the pollution tracing workload is large, no effective pollution tracing model simulation exists, and the pollution source investigation and tracing work is difficult to be effectively carried out in time, which can affect the management and treatment work of the river. At present, enterprises are discharged around the bank of the river channel, a corresponding water quality monitoring system is arranged at a sewage outlet to monitor the discharged water quality, and once the water quality is found to have an exceeding standard factor, related enterprises related to the exceeding standard water area are needed to be manually searched, a pump station is closed, the discharge is stopped, and further pollution is avoided.
In actual work, when the pollution discharge exceeds the standard, the manager can acquire monitoring alarm data, but the existing water quality monitoring system cannot judge which pollution discharge enterprises and possible pollution discharge paths the alarm position possibly relates to, the workload of the manager is large, and the efficiency of processing events is low.
In order to solve the problems, the alarm position is calibrated based on the geographic information system, and nearby sewage enterprises possibly involved and possible sewage pipelines are calibrated based on the alarm position, so that more valuable investigation clues are provided for the management personnel to accurately investigate the event and reduce the range. Meanwhile, the informatization platform needs to provide an information pushing function of the event so that related departments and personnel can perform joint actions, and the event handling efficiency is improved.
The invention provides a method for rapidly distinguishing suspicious pollution enterprises within a certain time range through a pollution tracing model.
Disclosure of Invention
According to the invention, the positions of pollution discharge enterprises, river monitoring points and sewage treatment plants are calibrated through a geographic information system, a mathematical model for reversely pushing pollution tracing at the time point of occurrence of a pollution event is constructed, enterprises around the river are accurately divided into a plurality of categories (determining pollution sources: { enterprise set }, suspected pollution sources: { enterprise set }, to-be-examined pollution sources: { defaults to the sewage treatment plants, to-be-examined and updated }), and law enforcement departments can rapidly search enterprises causing pollution according to the categories; and by applying the model and combining the data collected by the river channel detection points, the instant pollution discharge or continuous pollution discharge condition of a pollution discharge enterprise is judged. The invention greatly shortens the time of law enforcement department to cope with pollution event through the construction of pollution tracing model.
The invention provides a river pollution tracing method based on a river water pollution tracing model, which comprises the following steps:
step S01: dividing the river channel, and determining the positions and the number of river channel monitoring points based on the positions and the number of potential pollution source points under a certain alarm control point system;
step S02: judging the upstream-downstream relationship among the river channel monitoring point, the alarm control point and the potential pollution source point;
step S03: monitoring the alarm control point data in real time; the river channel monitoring points are utilized to collect river channel water pollution data in real time; monitoring the potential pollution source point data in real time; monitoring the water flow speed of a river channel;
step S04: triggering early warning when a certain pollution factor of the alarm control point is larger than an early warning value, and determining the time range in which each potential pollution source point is likely to generate pollution according to the following formula:
t 0 - t in - S A,W / u - C < t A < t 0
in the formula ,t A the time at which the potential contamination source point a may generate contamination;t 0 triggering early warning time for the alarm control point;t in the interval time monitored for the alarm control point;S A,W the spherical distance between the potential pollution source point A and the alarm control point;uis the average water flow rate;Cis a tolerable time constant;
step S05, establishing a water pollution traceability model as follows:
wherein ,t 0 - t in - S A,W / u - C < t A < t 0
in the formula ,G(A M ) Monitoring contamination factor M for potential contamination Source A over timet A Concentration within the range;G(Q M ) A threshold value for a pollution factor M;G(W M ) For the alarm control point pollution factor Mt 0 The concentration at the moment;G(B M ) The concentration of pollution factors M for river monitoring points;
step S06, generating a set of potential pollution points of different pollution source types when the alarm control point triggers early warning based on the water pollution tracing model.
The alarm control point is a sewage treatment plant or a river monitoring point.
The potential pollution source point is a pollution discharge enterprise.
For the deterministic pollution source, a plurality of water quality observation points are arranged in a river channel and at the downstream of the deterministic pollution source at intervals according to the requirement;
defining a pollutant factor concentration threshold matrix as M, wherein the water quality observation points aremThe concentration of each pollutant factor of the water quality observation point isPThe number of the observed values of the water quality observation points isnThe method comprises the steps of carrying out a first treatment on the surface of the The judgment model of transient pollution or continuous pollution is established as follows:
in the formula ,irepresent the firstiThe number of water quality observation points is less than or equal to 1-i≦m；jRepresent the firstjTime observation points are 1 +.j≦n；P j,i Represent the firstjThe first water quality detection point at each momentiA personal factor concentration value;
and judging that the deterministic pollution source belongs to the transient pollution or the continuous pollution according to the judging model of the transient pollution or the continuous pollution.
The method has the beneficial effects that: the river water pollution traceability model provided by the invention can accurately position the set of potential pollution enterprises at the moment of pollution occurrence, and greatly shortens the time and cost of investigation by the environment-friendly law enforcement department; and it can be determined whether the type of the sewage of the enterprise belongs to a continuous discharge for a certain time or an instantaneous discharge for a short time.
Drawings
For a more complete understanding of the present invention, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a flow chart of a river pollution tracing method based on a river water pollution tracing model;
FIG. 2 is a plan view of a river network;
FIG. 3 is a deterministic contamination source determination schematic;
FIG. 4 is a schematic diagram of a pollution abatement enterprise upstream of a river monitoring point for determining suspected pollution sources;
FIG. 5 is a schematic diagram of a suspected pollution source determination of a pollution discharge enterprise downstream of a river monitoring point;
fig. 6 is a schematic view of pollution source determination to be examined.
Detailed Description
For the purposes of explanation, specific details, and effective applications of the present invention are set forth in order to facilitate understanding and practice by those of ordinary skill in the art, as will be further described in detail below in connection with the embodiments of the invention and the accompanying drawings. It is apparent that the examples described herein are for illustration and explanation of the present invention only and are not intended to be limiting.
The invention provides a river pollution tracing method based on a river water pollution tracing model, which comprises the following steps that one or more alarm control points are selected, wherein the alarm control points can be sewage treatment plants or river monitoring points and the like, and the specific steps of the method are described by taking the alarm control points as the sewage treatment plants. Referring to fig. 1, the river pollution tracing method based on the river water pollution tracing model provided by the invention comprises the following steps:
step S01: dividing the river channel and determining the positions and the number of river channel monitoring points based on the positions and the number of potential pollution source points in a certain sewage treatment plant system.
The potential pollution source point is mainly a pollution discharge enterprise.
The river channel monitoring points are existing monitoring points in the river channel or newly established according to the needs.
Step S02: and judging the upstream-downstream relationship among the river monitoring point, the sewage treatment plant and the pollution source point.
In order to accurately judge the upstream and downstream relations of the river channel, the sewage treatment plant and the pollution source point (namely, a sewage disposal enterprise), the longitude and latitude of the sewage treatment plant and the pollution source point need to be manually marked according to a geographic information system, and the corresponding upstream and downstream relations of the pollution source point, the river channel and the sewage treatment plant are marked according to river flow direction.
Assuming that a river network plan schematic diagram is shown in fig. 2, sewage treatment plant monitoring points, pollution source monitoring points (namely enterprise monitoring points) and river channel monitoring points are shown in fig. 2.
Step S03: monitoring the sewage treatment plant data in real time; acquiring river channel monitoring point data in real time by utilizing the river channel monitoring points; monitoring the potential pollution source point data in real time; and monitoring the water flow speed of the river channel.
Step S04: when a certain pollution factor of the sewage treatment plant is larger than an early warning value, triggering early warning, and determining a time range in which each pollution source point is likely to generate pollution according to the following formula:
t 0 - t in - S A,W / u - C < t A < t 0
in the formula ,t A for the time that contamination of source point a may occur;t 0 triggering early warning time for the sewage treatment plant;t in an interval time monitored for the sewage treatment plant;S A,W is the spherical distance between the pollution source point A and the sewage treatment plant W;uis the average water flow rate;Cis a tolerable time constant.
For sewage treatment plants, because the sewage treatment plants have certain intervals on the collection time of the concentration of pollutants and certain distances are reserved between sewage treatment plants and sewage treatment plants, the range of possible sewage discharge time of each sewage treatment plant can be determined according to requirements according to the time of triggering early warning of the sewage treatment plants.
For example, assuming that a sewage treatment plant triggers an early warning at 1 point, the sewage treatment plant monitoring interval is 3 minutes, then the current time (1 point) is 3 minutes forward, and pollution may already occur. Thus the pollution time of sewage enterprises under the sewage treatment plant systemtThe range is set as follows:
(1 point-3 minutes-distance between sewage enterprises and sewage plants/river water flow speed-tolerable time variation) +.tAnd less than or equal to 1 point.
Based on this, the investigation time of the contamination source point can be locked.
Step S05, establishing a water pollution traceability model as follows:
wherein ,t 0 - t in - S A,W / u - C < t A < t 0。
in the formula ,G(A M ) Monitoring pollution factor M for pollution source point A at timet A Concentration within the range;G(Q M ) A threshold value for a pollution factor M;G(W M ) For the pollution factor M of sewage treatment plantst 0 The concentration at the moment;G(B M ) The concentration of pollution factors M at the monitoring points of the river channel.
The water pollution traceability model is specifically described as follows:
(1) Deterministic contamination source: if the pollution factor of the sewage treatment plant W exceeds the threshold value, and the pollution source point A monitors the pollution factor exceeding the threshold value in the time range that the pollution source point is likely to generate pollution, which is determined in the step S04, the pollution source point A is a deterministic pollution source.
As shown in FIG. 3, if the total phosphorus early warning value of the pollution factor is 5mg/L, the total phosphorus detection value of the sewage treatment plant is 10mg/L, and the triggering report is triggeredAlarming; aiming at each enterprise monitoring point, the corresponding time of each monitoring pointt A Monitoring 18mg/L of total phosphorus of the pollution factors of enterprises 2, 10mg/L of total phosphorus of the pollution factors of enterprises 3 and 11mg/L of total phosphorus of the pollution factors of enterprises 4 in a range; in this case, enterprise 2, enterprise 3, and enterprise 4 are all defined pollution source nodes.
At this time, the pollution discharge enterprise set with pollution source point pollution factor greater than the threshold value is marked as a deterministic pollution source, and the credibility is 1.
(2) Suspected contamination source: when the W pollution factor of the sewage treatment plant exceeds the threshold value, but the pollutants at the monitoring points of the enterprises do not exceed the threshold value, two conditions are divided:
first case: the monitoring enterprises are upstream of the river channel monitoring points, the pollutant concentration of the enterprise monitoring points is normal, the pollutant concentration of the downstream river channel monitoring points exceeds a threshold value, at this time, the pollution exceeding threshold value is probably caused by the theft and drainage of the upstream sewage disposal enterprises, the upstream sewage disposal enterprises are suspected sewage disposal nodes, the reliability is high, and a high weight value (between 0 and 1) can be set.
As shown in FIG. 4, if the total phosphorus early warning value of the pollution factor is 5mg/L and the total phosphorus detection value of the sewage treatment plant is 10mg/L, triggering an alarm; monitoring enterprise 2, monitoring enterprise 3, monitoring enterprise 4 all do not monitor pollution factor and exceeds standard, but all detect pollution and exceed standard in downstream river course monitoring point 1 and river course monitoring point 2 department, consequently, probably be the pollution that the upstream enterprise was secretly arranged and is led to, monitoring enterprise 2, 3, 4 all are suspected blowdown node, and the credibility is higher.
Second case: monitoring the downstream of a river channel monitoring point by an enterprise, wherein the concentration of pollutants at the monitoring point of the enterprise is normal; at this time, the downstream sewage enterprises of the river channel monitoring points may have the condition of stealing and discharging, so the downstream sewage enterprises are also listed as suspected sewage nodes, and weight values (between 0 and 1) are set according to the condition.
As shown in FIG. 5, if the total phosphorus early warning value of the pollution factor is 5mg/L and the total phosphorus detection value of the sewage treatment plant is 10mg/L, triggering an alarm; for monitoring enterprise 2, it is located downstream of river channel monitoring point 1, and the monitoring value of enterprise monitoring point 2 does not exceed the threshold. At this time, the enterprise 2 still belongs to the suspected pollution discharge node, and a weight value (between 0 and 1) can be set according to the situation.
(3) Pollution sources to be examined: when the W pollution factor of the sewage treatment plant exceeds the threshold value, but the pollution factors of all river monitoring points do not exceed the threshold value, and the pollutants of the enterprise monitoring points do not exceed the threshold value, it is possible that sewage is discharged by a sewage discharging enterprise at the downstream of the river monitoring points, so that the pollution factors of the sewage treatment plant exceed the threshold value, and manual investigation is needed.
As shown in fig. 6, the enterprise 2 downstream of the river monitoring point is marked to be inspected when the pollution factor of the undetected enterprise is greater than the threshold value and the pollution factor of the river is less than the threshold value, but the pollution factor of the sewage treatment plant is greater than the threshold value.
Based on the water pollution tracing model, when a sewage treatment plant triggers early warning, generating enterprise sets of different pollution source types: (determining the pollution source is: { enterprise set }, suspected pollution source is: { enterprise set }, and the pollution source is to be checked } { defaults to be a sewage treatment plant, and is updated after being checked }); the law enforcement department can quickly find relevant enterprises to conduct the investigation of pollution events through quick calculation results.
By the river pollution tracing method based on the river water pollution tracing model, the possibility that relevant enterprises exceed standard and discharge when alarm control points send alarm information can be rapidly obtained. In order to further determine whether the sewage is discharged instantaneously or continuously, a plurality of simple water quality observation points can be arranged in the river channel and at intervals as required at the downstream of the sewage enterprises.
Defining a pollutant factor concentration threshold value matrix as M, and defining water quality observation pointsmThe concentration of each pollutant factor of the water quality observation point isPThe number of the observed values of each water quality observation point isnThe method comprises the steps of carrying out a first treatment on the surface of the The judgment model for the instantaneous pollution or continuous pollution of the sewage disposal enterprise is established as follows:
in the formula ,irepresent the firstiThe number of water quality observation points is less than or equal to 1-i≦m；jRepresent the firstjTime observation points are 1 +.j≦n；P j,i Represent the firstjThe first water quality detection point at each momentiAnd a factor concentration value.
For the judging model of the instant sewage or continuous sewage of the sewage enterprises, the pollutant concentration of the water quality observation point arranged in the river channel is within the observation time TPExceeds a threshold M and the number of continuous rises exceeds 2nAnd 3, the corresponding pollution discharge enterprises are continuous pollution; the pollutant concentration P of the water quality observation point exceeds the threshold value M within the observation time T, and the continuous rising frequency is not more than 2nAnd 3, the corresponding sewage disposal enterprises are instant pollution.
Claims (4)
1. A river pollution tracing method based on a river channel water pollution tracing model comprises the following steps:
step S01: dividing the river channel, and determining the positions and the number of river channel monitoring points based on the positions and the number of potential pollution source points under a certain alarm control point system;
step S02: judging the upstream-downstream relationship among the river channel monitoring point, the alarm control point and the potential pollution source point;
step S03: monitoring the alarm control point data in real time; the river channel monitoring points are utilized to collect river channel water pollution data in real time; monitoring the potential pollution source point data in real time; monitoring the water flow speed of a river channel;
step S04: triggering early warning when a certain pollution factor of the alarm control point is larger than an early warning value, and determining the time range in which each potential pollution source point is likely to generate pollution according to the following formula:
t 0 - t in - S A,W / u- C < t A < t 0
in the formula ,t A the time at which the potential contamination source point a may generate contamination;t 0 triggering early warning time for the alarm control point;t in the interval time monitored for the alarm control point;S A,W the spherical distance between the potential pollution source point A and the alarm control point;uis the average river water flow speed;Cis a tolerable time constant;
step S05, establishing a water pollution traceability model as follows:
wherein ,t 0 - t in - S A,W / u- C < t A < t 0
in the formula ,G(A M ) Monitoring contamination factor M for potential contamination Source A over timet A Concentration within the range;G(Q M ) The early warning value of the pollution factor M;G(W M ) For the alarm control point pollution factor Mt 0 The concentration at the moment;G(B M ) The concentration of pollution factors M for river monitoring points;
step S06, generating a set of potential pollution source points of different pollution source types when the alarm control point triggers early warning based on the water pollution tracing model of step S05.
2. The method of claim 1, wherein the alarm control point is a sewage treatment plant or a river monitoring point.
3. The method of claim 1, the potential source of pollution being a sewage enterprise.
4. A method according to any one of claims 1 to 3, wherein for the deterministic pollution source, a plurality of water quality observation points are arranged at intervals as required in a river channel downstream of the deterministic pollution source;
defining a pollutant factor concentration threshold matrix as M, wherein the water quality observation points aremThe concentration of each pollutant factor of the water quality observation point isPThe number of the observed values of the water quality observation points isnThe method comprises the steps of carrying out a first treatment on the surface of the The judgment model of transient pollution or continuous pollution is established as follows:
in the formula ,irepresent the firstiThe number of water quality observation points is less than or equal to 1-i≦m；jRepresent the firstjTime observation points are 1 +.j≦n；P j,i Represent the firstjTime of dayiContaminant factor concentration values for each of the water quality monitoring points;
and judging that the deterministic pollution source belongs to the transient pollution or the continuous pollution according to the judging model of the transient pollution or the continuous pollution.
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| CN117192064B (en) * | 2023-11-07 | 2024-04-02 | 陕西得天节能环保检测有限公司 | Environmental pollution source based detection method and system |
| CN117634178B (en) * | 2023-11-24 | 2024-05-28 | 广东省环境科学研究院 | System and method for efficiently tracing water pollution sources |
| CN117373557B (en) * | 2023-12-05 | 2024-02-27 | 山东清控生态环境产业发展有限公司 | Tracing method and system based on multidimensional data |
| CN118521838A (en) * | 2024-07-23 | 2024-08-20 | 德司信信息产业江苏股份有限公司 | Environmental protection data acquisition and monitoring control system based on industry thing networking |
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Denomination of invention: A River Pollution Traceability Method Based on River Water Quality Pollution Traceability Model Granted publication date: 20230530 Pledgee: Shijiazhuang Luquan Rural Commercial Bank Co.,Ltd. Pledgor: BEIJING YUNLU TECHNOLOGY CO.,LTD. Registration number: Y2024980015341 |