Real-time tracing method for river water pollution

Abstract

The invention discloses a river water pollution real-time tracing method, which comprises the following steps: obtaining a pollution source position of a river basin, obtaining a pollutant type discharged by a pollution source, and obtaining pollutant particle parameters and pollutant types; obtaining a river connection relation of the river basin, and confirming an input flow and an output flow of pollutants; based on the output flow of the pollutants, the pollutant type of the river basin is obtained, and the input flow of the pollutants is obtained; obtaining a theoretical pollutant level based on the theoretical water flow velocity and pollutant particle parameters of the river basin; based on the actually measured pollutant concentration and the actually measured water flow velocity, acquiring an actually measured pollutant level; and obtaining the pollutant source based on the actually measured pollutant level and the theoretical pollutant level. The problems of difficulty in real-time detection and insufficient traceability precision in a water pollution analysis method based on sampling in the prior art are solved. The traceability speed and precision are fully improved, and various hydrological conditions in rivers can be handled.

Description

Technical Field

[0001] This application belongs to the field of pollutant identification and source tracing, and specifically, to a method for real-time source tracing of river water pollution. Background Art

[0002] In the protection of river water resources, it is necessary to determine the pollution sources of water resources. Currently, the main method is to conduct on-site sampling, and then detect the obtained samples to obtain relevant parameters of pollutants. Based on these parameters, the pollution sources are determined in the upstream rivers of the water resource sampling. This method obviously has a long time for tracing pollutants and is difficult to achieve real-time source tracing. At the same time, the method of simply analyzing based on the composition of pollutants fails to consider the situation where there are multiple potential pollution sources in some rivers. As a result, in the method of only monitoring based on the obtained samples, since the pollutants generated by different pollution sources can be mixed, it is difficult to determine the specific location of the pollution source, resulting in a low source tracing accuracy.

[0003] Therefore, how to develop a real-time and accurate source tracing method for river water pollution is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] To solve the problems of difficult real-time source tracing and low source tracing accuracy in the existing river water pollution source tracing operations, this application discloses a method for real-time source tracing of river water pollution, specifically: A method for real-time source tracing of river water pollution, the method comprising: Obtain the pollution source locations in the river basin, and obtain the types of pollutants discharged by the pollution sources to obtain pollutant particle parameters and pollutant types; Obtain the river connection relationships in the river basin, and determine the input and output flows of pollutants; Based on the output flow of the pollutants, obtain the types of pollutants in the river basin and determine the input flow of the pollutants; Based on the theoretical water flow velocity in the river basin and the pollutant particle parameters, obtain the theoretical pollutant level; Based on the measured pollutant concentration and the measured water flow velocity, obtain the measured pollutant level; Based on the measured pollutant level and the theoretical pollutant level, obtain the pollutant source.

[0005] Optionally, the obtaining the pollution source locations in the river basin, and obtaining the types of pollutants discharged by the pollution sources to obtain pollutant particle parameters and pollutant types includes: Obtain the pollution source locations in the river basin, and establish the corresponding relationship between the pollution source locations and the rivers in the river basin to obtain the pollution source - river relationship; Obtain the pollutant parameters discharged by the pollution source to obtain the particle parameters and pollutant type parameters of the pollutants; Based on the pollution source - river relationship, establish the correspondence between the pollutant particle parameters and pollutant types in the river to obtain the river - pollutant correspondence.

[0006] Optionally, the obtaining of the river connection relationship in the river basin and determining the input flow and output flow of pollutants includes: Based on the river connection relationship in the river basin, obtain the confluence points in the river basin; Based on the confluence points in the river basin and the positions of the pollution sources in the river basin, obtain the pollutant input flow in the river basin; Based on the pollutant input flow and the positions of the confluence points in the river basin, obtain the output flow of the pollutants.

[0007] Optionally, the obtaining of the output flow of the pollutants based on the pollutant input flow and the positions of the confluence points in the river basin includes: Obtain all the confluence points in the river basin and obtain the spatial positions of the confluence points; Based on the spatial positions of the confluence points and the positions of the confluence points in the river basin, obtain the river positions where the confluence points are located; Obtain the water flow directions of all the rivers in the river basin and obtain the upstream and downstream rivers of the confluence points; Based on the upstream and downstream rivers of the confluence points, set the downstream river of the confluence point as the output flow of the pollutants.

[0008] Optionally, the obtaining of the pollutant types in the river basin based on the output flow of the pollutants and determining the possible input flow of pollutants includes: Based on the output flow of the pollutants, obtain the confluence points corresponding to the pollutant output flow; Based on the positions of the confluence points, obtain all the upstream rivers of the confluence points; Obtain the pollutant types of the confluence points to obtain the upstream pollutants; Based on the upstream pollutants and based on the river - pollutant correspondence, obtain the source rivers of the upstream pollutants, and the source rivers are the input flows of the pollutants.

[0009] Optionally, the obtaining of the theoretical pollutant level based on the theoretical water flow velocity in the river basin and the pollutant particle parameters includes: Obtain the water flow velocities of the rivers in the river basin to obtain the theoretical water flow velocity; Obtain the pollutant particle parameters of the rivers in the river basin to obtain the theoretical pollutant particle parameters; Based on the theoretical pollutant particle parameters and the theoretical water flow velocity, obtain the theoretical pollutant settlement depth, and the calculation equation of the theoretical pollutant settlement depth is: ; Wherein, represents the pollutant settlement depth; represents the acceleration of gravity; represents the pollutant particle density; represents the water flow density; represents the pollutant particle size; represents the hydrodynamic viscosity, which is determined according to the water temperature; represents the distance between the pollution source and the hydrological detection device; represents the average velocity of the distance between the pollutant and the hydrological detection device; Based on the pollutant particle parameters, obtain the settlement depths of different pollutants to obtain the theoretical pollutant levels.

[0010] Optionally, it further includes: Based on the position of the hydrological detection device, obtain the river position of the hydrological detection device in the river basin to obtain the device position; Based on the device position, obtain the adjacent confluence points of the device position and the rivers in the same river basin; Based on the water flow direction of the rivers in the river basin, obtain the upstream confluence point and the downstream confluence point of the hydrological detection device; Establish the corresponding relationship between the hydrological detection device and the upstream confluence point and the downstream confluence point to obtain the device-confluence point corresponding relationship.

[0011] Optionally, the obtaining of the measured pollutant level based on the measured pollutant concentration and the measured water flow velocity includes: Based on the hydrological detection device, obtain the measured pollutant concentration and the measured water flow velocity of the river basin; Based on the measured pollutant concentration and the measured water flow velocity, obtain the pollutant weight, and the pollutant weight equation is: ; Wherein, represents the pollutant weight; represents the measured pollutant concentration; represents the measured value of the water flow density; represents the measured water flow velocity; represents the longitudinal cross-sectional area of the river; represents the flowing time of the measured water flow; Based on the weight of the pollutant, obtain the measured sedimentation depth of the measured pollutant under the theoretical water flow velocity. The equation for the measured sedimentation depth of the pollutant is as follows: ; Wherein, represents the measured sedimentation depth of the pollutant; represents the measured hydrodynamic viscosity, which is determined according to the measured water temperature; represents the theoretical water flow velocity; represents the measured average velocity of the path of the pollutant and the water source detection device; Based on the pollutant particle parameters, obtain the measured sedimentation depths of different pollutants to obtain the measured pollutant levels.

[0012] Optionally, the obtaining of the pollutant source based on the measured pollutant level and the theoretical pollutant level includes: Based on the measured stratification depth and the theoretical stratification depth, obtain the stratification difference. When the ratio of the stratification difference to the preset stratification difference exceeds the preset ratio, obtain the pollutant type corresponding to the stratification difference, and obtain the position of the hydrological detection device to obtain the polluted basin; Obtain the position of the upstream confluence point of the polluted basin, and obtain the measured stratification depth and the theoretical stratification depth of all the upstream confluence points to obtain the pollution situation of the upstream confluence points; Based on the pollution situation of the upstream confluence points, determine the pollutant source.

[0013] Optionally, the determining of the pollutant source based on the pollution situation of the upstream confluence points includes: Obtain the most upstream confluence point suffering from pollution, and set the river between the most upstream confluence point and the adjacent upstream and downstream confluence points as the first polluted river; Based on the pollution source - river relationship, obtain the pollution sources existing in the first polluted river to obtain potential pollution sources; Obtain the pollutant particle parameters and pollutant types of the pollutants discharged by the potential pollution sources, and compare them with the pollutant particle parameters and pollutant types corresponding to the measured pollutant levels to determine the pollution source location.

[0014] The present application has the following beneficial effects: 1. Improve the timeliness of tracing the source of water pollution. After determining the location of the pollution source in the river basin, multiple detection devices are set in the river, and the input and output flows of pollutants are determined. Thus, after obtaining the types of pollutants and the water density in the river water, the pollutant stratification can be directly obtained based on the algorithm disclosed in the present application. Then, by comparing the theoretical pollutant stratification with the measured pollutant stratification, the tracing of water pollution can be directly achieved based on the positional relationship between the input and output flows, fully improving the timeliness.

[0015] 2. Improve the accuracy of tracing the source of water pollution. In the tracing of river water pollution in the present application, a comparison value is set, that is, the stratification state of pollutants in the water body. Thus, the theoretical stratification parameters and the measured stratification parameters are obtained. Among them, the measured stratification parameters do not set sensors at each depth level of the river. Instead, after obtaining the measured river water body parameters, some of the parameters are set as the parameters used in the determination of the theoretical stratification parameters, and the obtained stratification parameters are the measured stratification parameters. At this time, the direct comparison between the theoretical parameters and the measured parameters can be carried out to determine the change situation of pollutants, and then accurate tracing can be carried out based on the change situation.

[0016] 3. Reduce the environmental requirements for tracing the source of water pollution. In the river basin, the hydrological environment is likely to change due to the existence of various factors. Such environmental changes often lead to great changes in the stratification state of pollutants in the water body, and the stratification state disturbance caused by this environment is much greater than the spontaneous stratification resistance of pollutants in the water body. In the technical solution of the present application, the actually measured data obtained are used to determine the measured parameters and the parameters used in the process of obtaining the theoretical stratification state. Based on this method, even when the hydrological environment changes, the stratification state that can be formed based on the measured data and the theoretical hydrological environment can be obtained. Thus, in the obtained measured results and theoretical results, the unification of independent variables is achieved, and the dependent variables obtained have a comparison basis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments of the present application or the prior art. Obviously, the following descriptions are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific implementation manners to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings: Figure 1 It is a flowchart of a real-time tracing method for river water pollution provided by an embodiment of the present application; Figure 2 It is a schematic diagram of the pollutant stratification result in a real-time river water pollution source tracing method provided by an embodiment of the present application; Figure 3 It is a schematic diagram of a river basin in a real-time river water pollution source tracing method provided by an embodiment of the present application. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. In addition, in the embodiments of the present application, "first", "second", etc. are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence.

[0019] Pollution source tracing of river basins has become an important part of ecological protection work. In order to better avoid analyzing the pollution situation of the current river basin, it is necessary to fully improve the timeliness of river water pollution source tracing. In current source tracing methods, the main method is to take samples, and then conduct laboratory tests on the obtained samples to find pollutant parameters, and then conduct a reverse search for pollution sources upstream of the sampling point to find specific pollution sources. Obviously, this method will consume more time, especially in the case of complex water areas. For example, samples are taken on the main stream of a river area, but there are multiple potential pollution sources in the upstream tributaries. At this time, other means need to be used to determine the specific pollution source, and it cannot be obtained in real time only based on the adopted detection method. Generally speaking, it will lead to a significant reduction in the timeliness of pollutant source tracing. In addition, for the specific source tracing process, relevant pollutant concentration and other parameters in the sample are usually only used for determination. This method can only determine the exceeded pollutant values existing in the current river basin, but cannot determine the allowable low pollutant concentration change situation in the current river basin, resulting in difficulty in real-time identification of pollutant content changes. In addition, the pollutant performance in the river basin is affected by various factors, such as precipitation, agricultural runoff water, etc. Especially, precipitation will cause changes in the water flow velocity, and more vortices and turbulences will be generated in the water body, which will cause changes in the pollutant enrichment area and also cause a decrease in the pollutant detection accuracy in the obtained samples.

[0020] In the technical solution of this application, factors that may cause changes in the hydrological environment are processed, so as to determine the obtained theoretical pollutant stratification state. For the measured pollutant stratification, the obtained measured parameters are set to various theoretical parameters in the acquisition of the theoretical pollutant stratification state, so as to obtain the measured pollutant stratification state. Then, these two parameters are compared to determine whether the pollutant has changed. If it has changed, based on information such as the river connection relationship in the basin, real-time and accurate tracing of the pollutant is realized.

[0021] This application discloses a real-time tracing method for river water pollution, which improves the real-time performance and accuracy of tracing river water pollution. Specifically: As Figure 1 shown, it is a flowchart of a real-time tracing method for river water pollution provided by an embodiment of this application, including: S110. Obtain the location of the pollution source in the river basin, and obtain the types of pollutants discharged by the pollution source to obtain pollutant particle parameters and pollutant types; S120. Obtain the river connection relationship of the river basin, and determine the input flow and output flow of the pollutant; S130. Based on the output flow of the pollutant, obtain the types of pollutants in the river basin and determine the input flow of the pollutant; S140. Based on the theoretical water flow velocity of the river basin and the pollutant particle parameters, obtain the theoretical pollutant level; S150. Based on the measured pollutant concentration and the measured water flow velocity, obtain the measured pollutant level; S160. Based on the measured pollutant level and the theoretical pollutant level, obtain the source of the pollutant.

[0022] The purpose of all the above steps is to confirm the location of the pollution source in the river basin and determine the pollutant type, especially the pollutant particle parameters and pollutant types, so as to obtain the pollutant parameters that the pollution source can discharge. Then, obtain the input flow and output flow, as well as the theoretical pollutant level and the measured pollutant level. For the measured pollutant level, in order to avoid phenomena such as unclear stratification and excessive disturbance of the stratification when the hydrological environment changes, which may lead to the inability to determine the change amount of the pollutant, the hydrological environment in the measured pollutant stratification treatment and the hydrological environment parameters in the determination of the theoretical pollutant stratification are set synchronously. Then, the pollutant is analyzed, and based on the corresponding relationship between the river basin and the location of the corresponding pollution source, accurate tracing of the pollutant is realized.

[0023] Next, the content in all the above steps will be specifically described as follows: As described in step S110, the purpose of this step is to obtain the locations of pollution sources in the river basin, and based on the locations of the pollution sources and their specific locations in the river basin, determine the specific rivers where the pollution sources are located. Thus, in subsequent water pollution tracing, based on this correspondence, the pollution sources causing water pollution can be directly determined. Specifically: S111. Obtain the locations of pollution sources in the river basin, and establish the correspondence between the locations of the pollution sources and the rivers in the river basin to obtain the pollution source-river relationship.

[0024] The purpose of this step is to obtain the correspondence between pollution sources and rivers. That is to say, it realizes that the potential pollution sources existing in the river can be determined completely based on the information of the river, which can be better used for tracing the locations of pollution sources.

[0025] Among them, all pollution sources in the river basin are obtained, including factories, farmlands, mountains, etc., and all the pollution sources are marked.

[0026] Among them, after marking the pollution sources, the location of the pollution sources can be described using spatial coordinates.

[0027] Among them, to obtain the locations of all rivers in the river basin, the method of setting labels for the rivers can be adopted to obtain the information labels of the rivers and describe the rivers.

[0028] Among them, based on the information labels of the rivers and the spatial coordinates of the pollution sources, the rivers that can be affected by the pollution sources are obtained, and based on this influence relationship, a pollution source-river relationship is established between the pollution sources and the rivers.

[0029] In some embodiments, the pollution sources are not located on the river banks but have a certain distance from the rivers. By calculating the distance between the pollution sources and the adjacent rivers, the pollution degree of the pollution sources to the adjacent rivers is obtained, and thus a pollution source-river relationship is established based on this pollution degree. In this embodiment, a corresponding relationship also needs to be established based on the specific influence degree. For example, the established pollution source-river relationship is "P1—R2(0.3)—R5(0.2)—R6(0.5)", which means that pollution source 1 may cause pollution to rivers R2, R5, and R6, and the pollution degree weights are 0.3, 0.2, and 0.5 respectively. In terms of distance performance, the distance ratio between pollution source 1 and rivers R2, R5, and R6 is 5:2:3.

[0030] S112. Obtain the pollutant parameters discharged by the pollution sources to obtain the particle parameters and pollutant type parameters of the pollutants.

[0031] The purpose of this step is that for the already obtained pollution sources, it is necessary to determine the types of pollutants that the pollution sources can generate, so that in subsequent water pollution tracing, by identifying the pollutant parameters obtained from the downstream detection devices, the pollutant types can be obtained, and then the pollution sources can be traced.

[0032] Among them, for all pollution sources, determine the types of pollutants discharged and obtain the particle parameters of the pollutants, and incorporate both of these parameters into the pollutant type parameter area.

[0033] Among them, for all pollutant parameters, it is necessary to determine the pollutant types completely according to the characteristics of the current pollution source itself, so in this case, all pollutant type data can be obtained.

[0034] In some embodiments, a correspondence relationship is established between the pollution sources and the pollutant type data.

[0035] S113. Based on the pollution source - river relationship, establish the correspondence relationship between the pollutant particle parameters and the pollutant types in the river to obtain the river - pollutant correspondence relationship.

[0036] The purpose of this step is that through the obtained river - pollutant correspondence relationship, in subsequent water pollution tracing, by obtaining the pollutant parameters in the water body, ultimately trace upstream until the source river of the pollutants is found, and on this basis, the source pollution source of the water pollution can be further determined based on the pollution source - river relationship.

[0037] Among them, based on the pollutant parameters and the river where the pollutant parameters are located, directly establish a correspondence relationship between these two data.

[0038] In some embodiments, there may be multiple pollutants in the river, and the established river - pollutant relationship can be expressed as "R1 - p1 - p2 - p3", indicating that in river R1, there are three pollutants p1, p2, and p3, and at the same time, for such pollutants, parameters such as the allowable pollutant concentration are described.

[0039] As described in step S120, the purpose of this step is that for all the rivers in the river basin, they are essentially connected, and at the same time, for the pollutants existing therein, there will be a mixing and cumulative effect of pollutants downstream. Therefore, by determining the input flow and the output flow, after pollutants appear in the river, based on the input flow and the output flow, determine the river where the pollutants are located. Specifically: S121. Based on the river connection relationship of the river basin, obtain the confluence points of the river basin.

[0040] The purpose of this step is that for the entire river basin, there are a large number of river connection relationships. The connection points of the rivers are actually the confluence points of the river basin. Based on the positions of the confluence points, all the river connection relationships can be initially obtained, and based on the water flow direction, the pollutant input flows and output flows can be obtained, so as to represent the obtained river basin network.

[0041] Among them, based on the connection relationships of all the rivers in the river basin, the positions of the connection points in the connection relationships are determined, so that all the obtained connection points are set as confluence points.

[0042] Among them, for the determination of the positions of all the confluence points, it can be determined by obtaining the position coordinates of the confluence points, so as to obtain the analysis results.

[0043] In some embodiments, after obtaining the confluence points, the upstream and downstream relationships of all the confluence points can also be determined based on the water flow direction of the rivers, and marked. And the rivers can be represented by using the confluence point labels, such as: "A1—A2—A3—A4—C2—E9". Among them, there are 5 confluence points in the whole river. The section of the river between two confluence points represents the segmented river of the river. E9 is used as the boundary point between different river basins and is not used as a confluence point.

[0044] S122. Based on the confluence points of the river basin and the positions of the pollution sources in the river basin, obtain the pollutant input flows of the river basin.

[0045] The purpose of this step is that for all the confluence points in the river basin, their setting purpose is to determine the pollution sources corresponding to the confluence point areas. That is to say, for the confluence points, the rivers that input pollutants to them can all be used as input flows, so as to form, based on the confluence points, the upstream pollution sources of the confluence points.

[0046] Among them, based on the spatial coordinates of the confluence points, obtain the river positions where the confluence points are located, determine all the upstream rivers of the confluence points, and then all their corresponding upstream rivers are input flows.

[0047] Among them, for each confluence point, except for the river corresponding to the most upstream confluence point in the whole river basin, which is the output flow, the upstream rivers corresponding to other confluence points are all input flows.

[0048] In some embodiments, the confluence points only apply to the river segments mentioned above, and the upstream segments are input flows.

[0049] In some embodiments, obtain the pollution sources of the upstream rivers of the confluence points, so that the rivers with pollution sources are the input flows of the confluence points.

[0050] In some embodiments, only the rivers with pollution sources are set as input streams, and the other rivers are not set as input streams.

[0051] S123. Obtain the output stream of the pollutant based on the confluence point location of the pollutant input stream and the river basin.

[0052] The purpose of this step is to determine all the output streams in the entire river basin, so as to meet the situation where multiple tributaries are generated at the confluence point area in the connection relationship of some rivers, so as to adapt to more river spatial distribution states. Specifically: S1231. Obtain all the confluence points in the river basin and obtain the spatial locations of the confluence points.

[0053] The purpose of this step is to determine all the confluence points in the entire river basin, so as to obtain the spatial locations of the confluence points, so as to obtain the relative position relationship of the confluence points, so as to obtain the river flow relationship and realize the determination of the confluence point association relationship.

[0054] Among them, directly obtain all the confluence points in the river basin, and then based on the coordinate system, obtain the spatial coordinates of the confluence points to explain the positions of the confluence points.

[0055] In some embodiments, if the confluence point locations in all the rivers in the river basin are obtained, the obtained confluence point locations are the spatial locations of the confluence points.

[0056] In some embodiments, it is not necessary to make an accurate description of the spatial location of the confluence point, and it is only used to explain the relative position of the confluence point in the river.

[0057] S1232. Based on the spatial location of the confluence point and the position of the confluence point in the river basin, obtain the river position where the confluence point is located.

[0058] The purpose of this step is to obtain the position of the confluence point in the river by obtaining the spatial location of the confluence point and the position of the river, so that in the subsequent water pollution tracing, based on the position of the confluence point in the river, determine the corresponding relationship between the water pollution and the relevant confluence points, and thus trace the pollution source based on the position of the confluence point.

[0059] Among them, based on the spatial location of the confluence point and simultaneously obtain the river where the confluence point is located, obtain the specific position of the confluence point in the river, so as to obtain the position of the confluence point in the river.

[0060] In some embodiments, it is only considered that the confluence point is at the starting point or the ending point of the river segment in the river basin and is marked.

[0061] In some embodiments, based on all the confluence points existing in a river, two adjacent confluence points in the same river are determined, the distance therebetween is determined and recorded, so as to describe the river position of the confluence point by the distance.

[0062] S1233. Obtain the water flow directions of all the rivers in the river basin, and obtain the upstream and downstream rivers of the confluence point.

[0063] The purpose of this step is that for the water flow directions in the river basin, the water flow directions of all the confluence points and the positions of the confluence points can be determined. In this way, based on the water flow directions, the upstream and downstream spatial positions of the confluence point can be determined, and then whether there is a corresponding output flow at the confluence point can be determined based on the upstream and downstream spatial positions.

[0064] Among them, according to the water flow directions in all the rivers in the river basin, the water flow direction in the water flow with a confluence point is determined, so as to determine the type of the confluence point.

[0065] Among them, based on the water flow direction of the river, the upstream and downstream of the confluence point are determined, and correspondingly, for the spaces corresponding to the upstream and downstream, the upstream and downstream spatial positions are obtained.

[0066] In some embodiments, according to the water flow direction, the water flow direction between adjacent confluence points is also determined, the water flow input to the confluence point and the water flow output from the confluence point are obtained, and based on this, the upstream and downstream spaces of the confluence point are determined.

[0067] S1234. Based on the upstream and downstream rivers of the confluence point, set the downstream river of the confluence point as the output flow of the pollutant.

[0068] The purpose of this step is that based on the upstream and downstream spatial positions of all the confluence points, since the water flow output direction of the confluence point is obviously the downstream of the confluence point, in specific processing, the output flow of the confluence point can be obtained.

[0069] Among them, the positions of the pollutant input flow and the confluence point are obtained, and for the downstream river of the confluence point, it is set as the output flow.

[0070] In some embodiments, if the downstream river of the confluence point is decomposed into no less than 2 tributaries, then all the output flows are marked.

[0071] In some embodiments, for the case where there are multiple tributaries, for the corresponding relationship established between the confluence point and the output flow, the weights of the tributaries are also determined according to the flow rates of different tributaries. For example, it is recorded as "C2—C1(0.4)—C3(0.6)", indicating that the confluence point C2 corresponds to two tributaries C1~C2 and C3~C2, and the flow rate ratio of these two tributaries is 2:3.

[0072] Among them, in fact, all input flows in river basins are potential pollutant input flows. By determining such input flows, it is possible to obtain whether there are pollutants in the pollutant input flow for pollutant source tracing.

[0073] As described in step S130, the purpose of this step is that the pollutants output in the output flows of various pollutants will be mixed and accumulated downstream of the confluence point. Then, based on the connection relationship of the output flows, the confluence point corresponding to the pollutant output flow needs to be obtained to determine the sources of all pollutants. Among them, for the pollutant input flow and output flow, they are actually rivers within the river area, and they have different names in different scenarios. For example: The labels of two connected rivers are 1 and 2 respectively, and 1 is polluted. At this time, 1 is the pollutant output flow, and for 2, 1 becomes its pollutant input flow. To avoid ambiguity, the input flow and output flow of this application are specifically described. Specifically: S131. Based on the pollutant output flow, obtain the confluence point corresponding to the pollutant output flow.

[0074] The purpose of this step is that some confluence points in the river basin may correspond to multiple river tributaries, and all the rivers where the river tributaries are located belong to the output flow. Therefore, in the specific processing process, the most downstream confluence point of the corresponding output flow needs to be obtained. If the water body detected in the confluence point area is polluted, all the pollution sources upstream may cause the pollution in this confluence point area.

[0075] Among them, obtain the spatial positions of all confluence points and the river connection relationships corresponding to the confluence points to determine the sources of the water flows input into the confluence points.

[0076] Among them, for the confluence point corresponding to the pollutant input flow, based on the corresponding relationship between the confluence point and the pollutant output flow, if the established corresponding relationship is "R10: C1 - C2, A4 - C2", it means that the pollutant output flow corresponding to the confluence point C2 is the river between C1~C2 and A4~C2.

[0077] In some embodiments, for the established corresponding relationship of the confluence point, obtain the confluence points included in all the pollutant output flows corresponding to the confluence point to form a confluence point cluster.

[0078] S132. Based on the position of the confluence point, obtain all the upstream rivers of the confluence point.

[0079] The purpose of this step is that after determining the position data of the confluence point and the corresponding relationship between the confluence point and the output flow, all the upstream rivers corresponding to the confluence point are obtained. Thus, after determining the pollution of the confluence point, reverse tracing can be carried out based on the corresponding relationship between the confluence point and the upstream rivers.

[0080] Among them, the position of the confluence point is obtained, and all confluence points in the river upstream of the confluence point are obtained to obtain a confluence point cluster, as specifically described in step S131, which will not be elaborated here.

[0081] Among them, for the obtained confluence points, it is also necessary to synchronously obtain the input streams for such confluence points, so as to obtain the upstream river of the confluence point.

[0082] S133. Obtain the pollutant types of the confluence point to obtain upstream pollutants.

[0083] The purpose of this step is to obtain the pollutant type detection result in the confluence point area. Obviously, the pollutants existing therein come from the upstream of the confluence point, and based on the pollutant types, combined with all pollution sources and pollutant types in the upstream, a tracing operation can be carried out.

[0084] Among them, a pollutant detection device is set in the confluence point area to obtain the pollutant types in the confluence point area, such as a particle size detection device, a particle size concentration detection device, etc.

[0085] Among them, the pollutant detection device set in the confluence point area can be configured in a small range upstream or downstream of the confluence point to avoid the complex hydrological environment in the confluence point area, which is difficult to ensure the accurate identification and measurement of pollutants.

[0086] In some embodiments, a pollutant detection device is set within a reasonable range, and the pollutant types and concentrations upstream and downstream of the confluence point are obtained simultaneously. By taking the difference between the two values, the inflow situation of different pollutants in the confluence point area is obtained.

[0087] S134. Based on the upstream pollutants and based on the river-pollutant correspondence, obtain the source river of the upstream pollutants, and the source river is the input stream of the pollutants.

[0088] The purpose of this step is to, after determining the pollutant type parameters in the confluence point area and the upstream and downstream relationships of the pollutants, based on the pollutant category information and the river-pollutant correspondence, obtain the input stream.

[0089] Among them, when water pollution occurs in the confluence point area, obtain the pollutant category data, and then directly use the river-pollutant correspondence to determine the possible source rivers of the pollutants.

[0090] Among them, after obtaining the possible source rivers of the pollutants, directly search for the rivers corresponding to the pollutants and mark them within the river basin.

[0091] Among them, obtain the pollutant types of all possible source rivers of pollutants, search for the rivers with increased pollutant emissions from them, and thus determine the input streams of pollutants.

[0092] In some embodiments, after determining the pollutant categories at the confluence point, obtain all the upstream rivers corresponding to the confluence point, and obtain the pollutant category parameters of all the upstream rivers. When it is found that there are pollutants or an increase in pollutant parameters, the corresponding upstream river is the input stream of pollutants.

[0093] In some embodiments, directly set all the input streams corresponding to the confluence point as the input streams of pollutants.

[0094] As described in step S140, the purpose of this step is to, in the case of obtaining the theoretical pollutant level, set the comparison basis for various traceability values in the real-time water pollution traceability operation. Only at this time can the core technical solution of this application be realized, that is: based on the comparison between the theoretical pollutant level and the measured pollutant level, determine whether water pollution has occurred. Specifically: S141. Obtain the water flow velocity of the rivers in the river basin to obtain the theoretical water flow velocity.

[0095] The purpose of this step is that for the pollutants in the river basin, they will settle in the water body, and there is a certain relationship between the settlement depth and the water flow velocity. In addition, the overall technical concept of this application is not to directly set pollutant detection devices in the pollution source area, but to determine the accumulation location of pollutants based on the mixing and clustering effects of pollutants, and conduct traceability based on this parameter. Therefore, in specific processing, it is necessary to be able to obtain the theoretical water flow velocity.

[0096] Among them, measure the water flow velocity in an area where the water flow velocity is relatively slow and stable, and determine this water flow velocity as the theoretical water flow velocity.

[0097] In some embodiments, obtain the water flow velocity in the confluence point area, and this area is measured under normal river conditions, so as to obtain the water flow velocity in this area.

[0098] In some embodiments, measure the water flow velocities at multiple sampling points in the river and calculate the average value, and the obtained average value is the theoretical water flow velocity.

[0099] Among them, for the theoretical water flow velocity of this application, it is not a theoretical value, but a relative value that can be selected according to the actual measurement situation. For example: the water flow velocity measured in an area where the water flow is relatively slow and stable is set as the theoretical water flow velocity, which is directly set based on the measurement result. In another river, continue to obtain the water flow velocity under the stable state of the river and use it as the theoretical water flow velocity in this tributary.

[0100] S142. Obtain the pollutant particle parameters of the rivers in the river basin to obtain the theoretical pollutant particle parameters.

[0101] The purpose of this step is that the sedimentation velocity of pollutants in the river is related to the particle size of pollutant particles. Therefore, the particle sizes of different pollutants need to be obtained before the particle size parameters can be used to calculate the theoretical pollutant levels.

[0102] Among them, obtain the types of pollutants discharged by various pollution sources, and then determine the particle sizes of these pollutants, so as to use the obtained values as the theoretical pollutant particle parameters.

[0103] In some embodiments, sample the pollutants of the pollution source, and perform detection and measurement to obtain the theoretical pollutant particle parameters corresponding to all pollutants in this area.

[0104] In some embodiments, perform sampling operations on areas with gentle water flow velocity in the river, and detect the samples to obtain the theoretical pollutant particle parameters in the water flow, and use this parameter as the final result.

[0105] In some embodiments, if a new pollution source appears, obtain the generated pollutant samples and obtain the pollutant particle parameters.

[0106] Among them, for the theoretical pollutant particle parameters, the pollutant particle sizes are determined based on the types of pollutants that the pollution source may discharge, and these particle sizes are directly used as the theoretical pollutant particle parameters. For example: the typical pollutant particle size discharged by a certain pollution source is a , then just set this value as the theoretical pollutant particle parameter.

[0107] S143. Based on the theoretical pollutant particle parameters and the theoretical water flow velocity, obtain the theoretical pollutant sedimentation depth. The calculation equation for the theoretical pollutant sedimentation depth is: ; Among them, represents the pollutant sedimentation depth; represents the acceleration of gravity; represents the pollutant particle density; represents the water flow density; represents the pollutant particle size; represents the hydrodynamic viscosity, which is determined according to the water temperature; represents the distance between the pollution source and the hydrological detection device; represents the average velocity of the distance between the pollutant and the hydrological detection device.

[0108] The purpose of this step is to measure the sedimentation depth of pollutants at the location of the hydrological detection device for all pollutants. When the sedimentation depths of different pollutants are superimposed on the river cross-section, the theoretical pollutant levels can be obtained. That is to say, only when the sedimentation depth of pollutants is obtained can the theoretical pollutant levels be obtained.

[0109] Among them, based on the hydrological detection device, the water flow density is obtained. In the current technical means, the corresponding hydrological measurement device can already be used to directly measure the water flow density. The device that can be used in this process in this application is not specifically limited.

[0110] Among them, for the density of pollutant particles, in order to ensure accuracy, reasonable sampling is carried out, and based on laboratory testing work, the density of pollutant particles therein is measured to obtain the result.

[0111] Among them, the dynamic viscosity of the fluid is related to the temperature of the water flow. The specific relationship equation is: ; Among them, A and B are constants, which are 0.02411 and 247.8 respectively, T represents the absolute temperature of water. In specific processing, this parameter can be directly measured in the stratified calculation. Of course, when the hydrological parameters of the river change, this parameter can be calculated according to the temperature in the theoretical stratification parameters.

[0112] S144. Based on the pollutant particle parameters, obtain the sedimentation depths of different pollutants to obtain the theoretical pollutant levels.

[0113] The purpose of this step is to obtain the theoretical pollutant levels based on the obtained sedimentation depth of pollutants. Just construct the stratification relationship based on the sedimentation depth value therein to obtain the standard value for comparison.

[0114] Among them, for the obtained sedimentation depth of pollutants, establish the stratification states of all pollutants on the longitudinal section of the river, as Figure 2 shown. The schematic diagram of the pollutant stratification result in a real-time river water pollution tracing method provided by an embodiment of this application, where L1~L5 are the stratification states of different pollutants. For the pollutants in different levels, they are also recorded in the established theoretical pollutant stratification data to obtain the theoretical pollutant stratification result.

[0115] In some embodiments, for the obtained theoretical pollutant stratification relationship, it can be directly explained based on the numerical relationship without drawing the longitudinal section of the river in the specific processing process.

[0116] S145. Based on the position of the hydrological detection device, obtain the river position of the hydrological detection device in the river basin to obtain the device position.

[0117] The purpose of this step is that considering the above stratification equation, it is necessary to obtain the flow distance of river pollutants, which is obviously difficult to directly measure. Therefore, in specific processing, it can be determined based on the river position of the hydrological detection device in the river basin.

[0118] Among them, obtain the spatial coordinates of the hydrological detection device, and determine the device position based on the coordinate parameters, so as to realize the description of the spatial position.

[0119] In some embodiments, directly obtain the spatial coupling relationship of the hydrological detection device on the river, so as to obtain the position of the hydrological detection device in the river, so as to describe the position of the hydrological detection device.

[0120] S146. Based on the device position, obtain the adjacent confluence points of the device position and the river in the same river basin.

[0121] The purpose of this step is that due to the large number of hydrological detection devices, but a large number of devices are unevenly distributed in the river basin, and the distances between different hydrological detection devices are different. In order to facilitate the subsequent tracing of river water pollution, it is necessary to determine the spatial position relationship of the hydrological detection devices in the operation process before it can be used for tracing.

[0122] Among them, determine the association relationship between the hydrological detection device and the corresponding river, and set an identifier for the hydrological detection devices on the same river.

[0123] Among them, determine the adjacent confluence points of the device position and the river in the river basin to determine the adjacent confluence points of the current hydrological detection device, so as to determine the operation relationship between the hydrological detection device and its adjacent confluence points.

[0124] S147. Based on the water flow direction of the river in the river basin, obtain the upstream confluence point and the downstream confluence point of the hydrological detection device.

[0125] The purpose of this step is that for the hydrological detection device, its use is only to obtain the parameters of the water body, and it does not need to complete the calculation of relevant parameters. In addition, from the actual operation, the upstream confluence point of the hydrological detection device is obviously the input flow of pollutants, and the downstream is the output flow. If it is found that there are pollutants or the pollutant content exceeds the standard based on a certain hydrological detection device, the input flow can be determined based on the corresponding relationship between the hydrological detection device and the confluence point. That is to say, the corresponding relationship between the confluence point - hydrological detection device is established.

[0126] Among them, the water flow direction at the location where the hydrological detection device is located is obtained to determine the upstream and downstream directions of the hydrological detection device.

[0127] Among them, based on the spatial correspondence between the river and the confluence point, the upstream and downstream confluence points in the river where the hydrological detection device is located are determined to determine the upstream and downstream relationships of the confluence points.

[0128] Among them, an information label is established for the hydrological detection device, and then a data group is established for the label numbers of the upstream and downstream confluence points of the hydrological detection device and the information label of the hydrological detection device to illustrate the upstream and downstream confluence points corresponding to the hydrological detection device. As Figure 3 shown, it is a schematic diagram of the river basin in a real-time water pollution tracing method for rivers provided by an embodiment of the present application. Among them, the dotted line part is the boundary line of the river basin, the solid line therein is the river, and all the solid lines are the confluence points. The confluence points are marked according to their positions. At the same time, for the river segments between two of the confluence points, the pollution sources on the river segments are determined to obtain various corresponding relationships.

[0129] S148. Establish the corresponding relationship between the hydrological detection device, the upstream confluence point and the downstream confluence point to obtain the device-confluence point corresponding relationship.

[0130] The purpose of this step is that for the corresponding relationship between the hydrological detection device and the upstream and downstream confluence points that has been obtained, the established corresponding relationship can be directly used for water pollution tracing.

[0131] Among them, the corresponding relationship between the information labels of the hydrological detection device and the upstream and downstream is established to obtain the upstream and downstream confluence points associated with each hydrological detection, such as "A1—M1—A2", where it means that there is a hydrological detection device M1 between the confluence points A4 and A5.

[0132] In some embodiments, the distance between the upstream and downstream confluence points is relatively long, and multiple hydrological detection devices are set in the river. At this time, for the middle hydrological detection device, it is regarded as a confluence point to construct the association relationship, such as "A4—M5—M6—M7—M8—C2", where it means that there are four hydrological detection devices M5 to M8 in the river channel between A4 and C2, and they are sorted in the water flow direction as a whole. Regarding the hydrological detection device, it is not shown in the appendix Figure 3 but it can be determined depending on the water flow direction. In addition, the numbering of the hydrological detection devices is not limited either, and the labels can be simply configured based on the set hydrological detection devices.

[0133] As described in step S150, the purpose of this step is that for the water flow information obtained based on the hydrological detection device, there are likely parameter changes. Therefore, in specific processing, it may not be possible to form a clear stratification, and the parameter changes can easily have a great impact on the hierarchical distribution state. Therefore, in specific processing, it is also necessary to be able to eliminate the impact of the changed parameters on the final stratification calculation result based on the real-time measured parameters. Specifically: S151. Based on the hydrological detection device, obtain the measured pollutant concentration and the measured water flow velocity of the river basin.

[0134] The purpose of this step is that in the real-time tracing of river water pollution, it is obvious that it is necessary to analyze the pollution situation existing in the current river, which naturally needs to be determined based on actual detection. At the same time, since the water pollution generated by different pollution sources is different, it is also necessary to obtain the results based on the measured values and then process them. Therefore, in specific processing, it is necessary to obtain relevant values based on the parameters required in the calculation of the pollutant hierarchical distribution.

[0135] Among them, for the selected hydrological detection device, it should be able to measure parameters such as water body density and pollutant particle parameters to obtain relevant parameters.

[0136] In some embodiments, the selected hydrological detection device should also be able to obtain the water flow velocity and the water body temperature.

[0137] S152. Based on the measured pollutant concentration and the measured water flow velocity, obtain the pollutant weight. The pollutant weight equation is: ; Among them, represents the pollutant weight; represents the measured pollutant concentration; represents the measured value of the water flow density; represents the measured water flow velocity; represents the longitudinal cross-sectional area of the river; represents the flowing time of the measured water flow.

[0138] The purpose of this step is to obtain the pollutant weight based on the concentration parameter and the measured water flow velocity for the obtained measured pollutant parameters. In fact, for the water body, it itself belongs to a kind of solution. Therefore, in specific processing, by calculating the pollutant weight, the concentration of the solution can be obtained.

[0139] Among them, for the pollutant concentration, it can be obtained based on the hydrological detection device. Currently, a variety of devices have been developed, and this application does not limit this technology.

[0140] In some embodiments, for the hydrological detection device, it is the responsibility of the satellite, so that parameters such as the type of pollutants and the diameter of pollutant particles can be directly obtained by the satellite.

[0141] S153. Based on the weight of the pollutants, obtain the measured sedimentation depth of the measured pollutants under the theoretical water flow velocity. The equation for the measured sedimentation depth of the pollutants is: ; Wherein, represents the measured sedimentation depth of the pollutants; represents the measured hydrodynamic viscosity, which is determined according to the measured water temperature; represents the theoretical water flow velocity; represents the measured average velocity of the path of the pollutants and the water source detection device.

[0142] The purpose of this step is that for the obtained pollutant detection results, they still need to be processed to obtain the measured pollutant level. The reason for adopting this method is that when hydrological parameters change, such as during precipitation or leakage of farmland water, the water in the river actually cannot form a stable stratification. In this case, it is very difficult to accurately distinguish all pollutant types and proportions in the water body, and it is difficult to distinguish means that it is impossible to obtain the change value of a certain pollutant based on the change degree of the pollutant type, and then conduct accurate traceability. Therefore, in specific processing, the measured parameters also need to be processed.

[0143] Among them, for the obtained measured parameters, based on the pollutant concentration parameters, obtain the sedimentation depth of the pollutants under the measured river parameters and the measured hydrological parameters, so as to obtain the measured pollutant level.

[0144] Among them, obtain the measured water flow velocity and the measured hydrodynamic viscosity in this temperature environment to determine the specific sedimentation depth of the current pollutants.

[0145] In some embodiments, for the measured hydrodynamic viscosity and water flow velocity, they are also applied according to the calculation parameters of the theoretical pollutant sedimentation level, so as to obtain better comparison results.

[0146] S154. Based on the pollutant particle parameters, obtain the measured sedimentation depth of different pollutants to obtain the measured pollutant level.

[0147] The purpose of this step is to obtain the specific measured pollutant level, so as to compare the obtained measured results with the theoretical results to obtain more accurate results.

[0148] Among them, for the obtained measured sedimentation depth of the pollutants, directly form an image of the measured pollutant level.

[0149] In some embodiments, instead of establishing an image of the measured pollutant levels, numerical values are directly formed for numerical comparison.

[0150] As described in step S160, the purpose of this step is to determine the specific parameters for which the pollutant parameters have changed based on the comparison parameters by comparing the theoretical pollutant levels and the measured pollutant levels, so as to determine the type of pollutant that has changed and the basin area with water pollution according to this parameter, and then achieve real-time tracing of water pollution. Specifically: S161. Based on the measured stratification depth and the theoretical stratification depth, obtain the stratification difference. When the ratio of the stratification difference to the preset stratification difference exceeds the preset ratio, obtain the type of pollutant corresponding to the stratification difference, and obtain the location of the hydrological detection device to obtain the polluted basin.

[0151] The purpose of this step is that when obtaining the type of pollutant and the polluted basin, two parameters can be obtained simultaneously, namely: the basin area where the water pollution problem occurs, and the type of pollutant. The former can determine the river where the pollution source is located, and the latter can further accurately screen the pollution source based on the river where the pollution source is located to obtain the treatment result.

[0152] Among them, all the level parameters in the obtained theoretical pollutant levels and measured pollutant levels are compared to obtain the parameter changes existing in each level, and the stratification parameters corresponding to the stratification are obtained.

[0153] Among them, based on the pollutants corresponding to the level, the type of pollutant that has changed in the current water pollution is determined to determine the pollutants that have appeared or increased in the river.

[0154] Among them, based on the positions corresponding to the measured pollutant levels and the theoretical pollutant levels, directly obtain the location where the current water pollution phenomenon occurs, and the river where this location is located is the polluted basin.

[0155] S162. Obtain the location of the upstream confluence point of the polluted basin, and obtain the measured stratification depth and the theoretical stratification depth of all the upstream confluence points to obtain the pollution situation of the upstream confluence points.

[0156] The purpose of this step is that after determining the water body pollution, it is necessary to trace the pollution source, so it is necessary to obtain the type of pollutant in the current water body for determination. The core idea of this application is that in tracing the pollutant, it is determined based on the confluence points in the river, that is, the river is segmented, and then it is determined whether each segment has suffered from water pollution, and the pollution source is found based on the determined segments.

[0157] Among them, after determining the polluted river basin, determine the upstream confluence point of the basin, and determine whether there is water pollution in the confluence point area.

[0158] Among them, the water pollution analysis of the upstream confluence point is the same as the steps of step S161, which will not be elaborated here.

[0159] Among them, when it is determined that there is pollution in the upstream confluence point area, it is determined that the input stream corresponding to the upstream confluence point has been polluted, and the potential pollution sources existing in the upstream river segment may become actual pollution sources.

[0160] Among them, based on the analysis of the water pollution conditions of each confluence point, until it is found that there is no water pollution in a certain upstream confluence point, the potential pollution source in the current river segment is the pollution source.

[0161] In some embodiments, for all confluence points on the entire path, after finding water pollution, analyze all potential pollution sources on its path and determine the pollutant composition, so as to find out whether all pollution sources on the entire path have polluted the water body, so as to ensure that in the case of multiple pollution sources existing at the same time, the confirmation of all pollution sources can be achieved.

[0162] S163. Based on the pollution situation of the upstream confluence point, determine the source of the pollutant.

[0163] The purpose of this step is to find the most upstream confluence point where water pollution occurs based on the pollution situations of all upstream confluence points. Then, the river between the most upstream confluence point and its adjacent downstream confluence point area is the pollution source of the entire river basin, and the potential pollution sources in this river section may have caused water pollution. Specifically: S1631. Obtain the most upstream confluence point that has been polluted, and set the river between the most upstream confluence point and the adjacent upstream confluence point as the first polluted river.

[0164] The purpose of this step is that after obtaining the most upstream confluence point that has been polluted, it means that there is a pollution source in the upstream river of the current confluence point. However, considering that there may be multiple potential pollution sources in this river section, further detection is still required to determine the specific pollution source. That is to say, the determination process of the first polluted river can lay a foundation for the subsequent determination of the pollution source.

[0165] Among them, based on the determination of the current polluted area, determine the upstream confluence point of the polluted area, obtain the pollution situation of the adjacent upstream confluence point, and determine whether the upstream confluence point has been polluted.

[0166] Among them, based on the method of the previous step for analysis, the upstream confluence points where pollutants may exist are determined until there is no water pollution at a certain upstream confluence point, and then this upstream confluence point is set as the most upstream confluence point.

[0167] Among them, for the determination process of the river that is first polluted, it is determined based on the relevant content in the above steps. A simple way to understand it is: Figure 3 Taking [example] as an example, each confluence point among them is numbered. In the technical solution of this application, E1~E10 represent the boundary points between the river basin and the non - area. In the determination of the river that is first polluted, when it is found that there is a pollutant manifestation at a certain sensor between D2 and A7, then analyze whether there is pollution at D2. After finding that there is pollution, obtain the upstream confluence point of D2, which is D1. If it is found that D1 is polluted, then analyze whether the upstream confluence point - A6 - has pollutants again. If it is found that there are still pollutants, further select point A5 for pollutant analysis. If it is still found that there are pollutants, then judge the pollutant manifestation of A4. When it is found that there is no pollutant manifestation at A4, then A5 is taken as the most upstream confluence point suffering from pollution, and the river that is first polluted is the river between A4 and A5.

[0168] S1632. Based on the relationship between the pollution source and the river, obtain the pollution sources existing in the river that is first polluted to obtain potential pollution sources.

[0169] The purpose of this step is that after obtaining the segmented river that is first polluted, in fact, the whole work is not over. The purpose of this application is to determine the precise pollution sources in the river. Therefore, in this case, all potential pollution sources in the currently first - polluted river need to be analyzed, and then the specific pollution sources causing pollution are accurately determined from the potential pollution sources.

[0170] Among them, based on the river that has been determined to be the first polluted, determine the pollution sources existing on this river.

[0171] Among them, for the pollution sources existing on the river, in fact, these pollution sources do not necessarily cause water pollution problems. Therefore, it is not that once the pollution sources on the river are determined, it can be finalized. Instead, all the pollution sources existing on this river are set as potential pollution sources. Taking the case in S1631 as an example, if it is found that the river between A4 and A5 is the river that is first polluted, then all the pollution sources between this river are set as potential pollution sources.

[0172] S1633. Obtain the pollutant particle parameters and pollutant types of the pollutants discharged by the potential pollution sources, and compare them with the pollutant particle parameters and pollutant types corresponding to the measured pollutant levels to determine the location of the pollution source.

[0173] The purpose of this step is that for all the obtained potential pollution sources, it is also necessary to judge and analyze whether there is actually a water pollution problem, and then the specific pollution sources can be determined. Only in this way can accurate pollution source information be obtained.

[0174] Among them, for the types of pollutants obtained based on the pollution sources, based on the obtained measured pollutant level data, the pollutant sources are compared, and for the obtained comparison results, the sources of the measured pollutants are determined. For example, for all potential pollution sources before A4 and A5, they are separately detected and analyzed to obtain the specific pollution sources.

[0175] In some embodiments, for all existing potential pollution sources, the pollutants they may emit are recorded, and then these pollutant data are recorded. Then, in the specific real-time tracing, the obtained measured pollutant level data is directly compared with the recorded pollutant data to determine the actual source of the pollutants.

[0176] In some embodiments, when pollutants that are not recorded in the database are found in the river, or the change rate of the pollutant content is much higher than the water pollution range that known potential pollution sources can cause, it is necessary to identify the pollutant, conduct on-site exploration of the relevant river basin, determine the type of pollution source, and record it.

[0177] This application has the following beneficial effects: 1. It improves the timeliness of tracing the source of water pollution. After determining the location of the pollution source in the river basin, multiple detection devices are set in the river, and the input and output flows of the pollutants are determined. Thus, after obtaining the types of pollutants and the water density in the river water, the pollutant stratification can be directly obtained based on the algorithm disclosed in this application. Then, based on the comparison between the theoretical pollutant stratification and the measured pollutant stratification, and based on the positional relationship between the input and output flows, the tracing of water pollution is directly realized, which fully improves the timeliness.

[0178] 2. It improves the accuracy of tracing the source of water pollution. In the tracing of river water pollution in this application, a comparison value is set, that is, the stratification state of the pollutants in the water body. Thus, the theoretical stratification parameters and the measured stratification parameters are obtained. Among them, the measured stratification parameters are not to set sensors at each depth level of the river, but after obtaining the measured river water parameters, some of the parameters are set as the parameters used in the determination process of the theoretical stratification parameters, and the obtained stratification parameters are the measured stratification parameters. At this time, the direct comparison between the theoretical parameters and the measured parameters can be carried out to determine the change situation of the pollutants, and then accurate tracing is carried out based on the change situation.

[0179] 3. Reduces the environmental requirements for tracing the source of water pollution. In a river basin, the hydrological environment is likely to change due to various factors. Such environmental changes often lead to great changes in the stratification state of pollutants in the water body, and the disturbance of the stratification state caused by this environment is much greater than the spontaneous stratification resistance of pollutants in the water body. In the technical solution of this application, the actually measured data obtained are used to determine the measured parameters and the parameters used in the process of obtaining the theoretical stratification state. Based on this method, even when the hydrological environment changes, the stratification state that can be formed under the condition of the measured data and the theoretical hydrological environment can be obtained. Thus, in the measured results and the theoretical results obtained, the independent variables are unified, and the dependent variables obtained have a basis for comparison.

[0180] Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to computer program instructions. The aforementioned computer program can be stored in a non-volatile storage medium. When the computer program is executed, it executes the steps including the above method embodiments. Alternatively, if the above integrated units of the present invention are implemented in the form of software function modules and sold or used as independent products, they can also be stored in a non-volatile storage medium. Based on such an understanding, the technical solution of the embodiments of the present invention, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a non-volatile storage medium and includes several instructions for causing an electronic device (which can be a personal computer, a server, a network device, etc.) to execute all or part of the methods described in the various embodiments of the present invention.

[0181] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention.

Claims

1. A real-time source tracing method for river water pollution, characterized in that: The method comprises: Obtain the location of pollution sources in the river basin, obtain the types of pollutants discharged by the pollution sources, and obtain the parameters of pollutant particles and types of pollutants; Obtaining river connectivity in the river basin to determine input and output flows of pollutants; Based on the output flow of the pollutants, obtaining the pollutant types in the river basin and determining the input flow of the pollutants; Obtaining a theoretical pollutant level based on a theoretical water flow velocity of the river basin and the pollutant particle parameters; Based on the measured pollutant concentration and the measured water flow velocity, the measured pollutant level is obtained; The pollutant source is obtained based on the measured pollutant level and the theoretical pollutant level.

2. The real-time source tracing method for river water pollution according to claim 1 is characterized in that: The method of obtaining the location of pollution sources in the river basin, obtaining the types of pollutants discharged by the pollution sources, and obtaining the parameters of pollutant particles and types of pollutants includes: Obtaining the location of the pollution source in the river basin, and establishing a corresponding relationship between the location of the pollution source and the rivers in the river basin to obtain a pollution source-river relationship; Obtaining parameters of pollutants discharged by the pollution source to obtain particle parameters and pollutant type parameters of the pollutants; Based on the pollution source-river relationship, a correspondence between pollutant particle parameters and pollutant types in the river is established to obtain a river-pollutant correspondence.

3. The real-time source tracing method for river water pollution according to claim 1 is characterized in that: The obtaining of the river connection relationship of the river basin and determining the input flow and output flow of pollutants includes: Based on the river connection relationship of the river basin, obtaining the confluence point of the river basin; Based on the confluence point of the river basin and the location of the pollution source in the river basin, obtaining the pollutant input flow of the river basin; Based on the confluence point position of the pollutant input flow and the river basin, the output flow of the pollutant is obtained.

4. The real-time source tracing method for river water pollution according to claim 3 is characterized in that: The step of obtaining the output flow of the pollutant based on the confluence point of the pollutant input flow and the river basin includes: Obtain all confluence points in the river basin and obtain the spatial positions of the confluence points; Based on the spatial position of the confluence point and the position of the confluence point in the river basin, the river position of the confluence point is obtained; Obtain the flow directions of all rivers in the river basin, and obtain the upstream and downstream rivers of the confluence point; Based on the upstream and downstream rivers of the confluence point, the downstream river of the confluence point is set as the output flow of the pollutant.

5. The real-time source tracing method for river water pollution according to claim 1 is characterized in that: The step of obtaining the pollutant type in the river basin based on the pollutant output flow and determining the possible pollutant input flow comprises: Based on the output flow of the pollutant, obtaining a confluence point corresponding to the output flow of the pollutant; Based on the location of the confluence point, obtaining all upstream rivers of the confluence point; Obtain the pollutant type of the confluence point to obtain upstream pollutants; Based on the upstream pollutants and the river-pollutant correspondence, the source river of the upstream pollutants is obtained, and the source river is the input flow of the pollutants.

6. The real-time source tracing method for river water pollution according to claim 1 is characterized in that: The obtaining of the theoretical pollutant level based on the theoretical water flow velocity of the river basin and the pollutant particle parameters includes: Obtaining the water flow velocity of the river in the river basin to obtain the theoretical water flow velocity; Obtaining pollutant particle parameters of rivers in the river basin to obtain theoretical pollutant particle parameters; Based on the theoretical pollutant particle parameters and the theoretical water flow velocity, the theoretical pollutant settling depth is obtained. The calculation equation for the theoretical pollutant settling depth is: ； in, Indicates the depth of pollutant deposition; represents the acceleration due to gravity; Indicates the density of pollutant particles; represents the water flow density; d Indicates the particle size of pollutant; It represents the dynamic viscosity of the fluid, which is determined according to the temperature of the water body; Indicates the distance between pollution source and hydrological monitoring device; Indicates the average speed of the distance traveled by the pollutants and the hydrological monitoring device; Based on the pollutant particle parameters, the sedimentation depths of the different pollutants are obtained to obtain a theoretical pollutant level.

7. The real-time source tracing method for river water pollution according to claim 6 is characterized in that: Also includes: Based on the position of the hydrological detection device, acquiring the river position of the hydrological detection device in the river basin to obtain the device position; Based on the device location, obtaining the device location and adjacent confluence points of rivers in the same river basin; Based on the water flow direction of the river in the river basin, obtaining the upstream confluence point and the downstream confluence point of the hydrological detection device; A correspondence between the hydrological detection device, the upstream confluence point and the downstream confluence point is established to obtain a device-confluence point correspondence.

8. The real-time source tracing method for river water pollution according to claim 1 is characterized in that: The step of obtaining the measured pollutant level based on the measured pollutant concentration and the measured water flow velocity includes: Based on the hydrological detection device, obtaining the measured pollutant concentration and the measured water flow velocity in the river basin; Based on the measured pollutant concentration and the measured water flow rate, the pollutant weight is obtained, and the pollutant weight equation is: ； in, Indicates the weight of pollutants; Indicates the measured pollutant concentration; Indicates the measured value of water flow density; Indicates the measured water flow velocity; It represents the longitudinal cross-sectional area of ​​the river; Indicates the flow time of the measured water flow; Based on the weight of the pollutants, the measured pollutant settling depth of the measured pollutants at the theoretical water flow rate is obtained, and the measured pollutant settling depth equation is: ； in, Indicates the measured pollutant sedimentation depth; It represents the measured dynamic viscosity of the fluid, which is determined according to the measured temperature of the water body; Indicates the theoretical water flow rate; Represents the measured average speed of the distance traveled by the pollutant and water source detection device; Based on the pollutant particle parameters, the measured sedimentation depths of the different pollutants are obtained to obtain the measured pollutant levels.

9. The real-time source tracing method for river water pollution according to claim 1 is characterized in that: The obtaining the pollutant source based on the measured pollutant level and the theoretical pollutant level includes: Based on the measured stratification depth and the theoretical stratification depth, a stratification difference is obtained. When the ratio of the stratification difference to the preset stratification difference exceeds the preset ratio, the pollutant type corresponding to the stratification difference is obtained, and the position of the hydrological detection device is obtained to obtain the polluted watershed; Obtaining the location of the upstream confluence point of the polluted river basin, and obtaining the measured stratification depth and the theoretical stratification depth of all the upstream confluence points to obtain the pollution status of the upstream confluence points; Based on the pollution situation of the upstream confluence point, the source of the pollutants is determined.

10. The real-time source tracing method for river water pollution according to claim 9 is characterized in that: The determining the source of the pollutants based on the pollution condition of the upstream confluence point includes: Obtaining the most upstream confluence point that is polluted, and setting the river between the most upstream confluence point and an adjacent upstream confluence point as the first polluted river; Based on the pollution source-river relationship, the pollution sources existing in the first polluted river are obtained to obtain potential pollution sources; The pollutant particle parameters and pollutant types of pollutants discharged by the potential pollution source are obtained, and compared with the pollutant particle parameters and pollutant types corresponding to the measured pollutant level to determine the location of the pollution source.

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