A real-time river water pollution tracing method

Abstract

The application discloses a river water pollution real-time tracing method, comprising the following steps: acquiring the pollution source position of a river basin, obtaining the pollutant type discharged by the pollution source, and obtaining the pollutant particle parameter and the pollutant type; acquiring the river connection relationship of the river basin, confirming the input flow and the output flow of the pollutant; based on the output flow of the pollutant, acquiring the pollutant type of the river basin, and acquiring the input flow of the pollutant; based on the theoretical water flow velocity of the river basin and the pollutant particle parameter, obtaining a theoretical pollutant level; based on the measured pollutant concentration and the measured water flow velocity, acquiring a measured pollutant level; and based on the measured pollutant level and the theoretical pollutant level, acquiring the pollutant source. The method solves the problems of difficult real-time detection and insufficient tracing accuracy in the prior art based on sampling and water pollution analysis. The tracing speed and accuracy are improved, and various hydrological conditions in the river can be coped with.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of pollutant identification and tracing, in particular to a real-time tracing method for river water pollution. BACKGROUND

[0002] In the protection of water resources in rivers, it is necessary to determine the source of pollution of water resources. The method currently mainly used is to carry out field sampling, and then detect the obtained samples to obtain the relevant parameters of the pollutants, and determine the pollution source in the upstream river where the water resource is sampled based on the parameters. This method obviously takes a long time to trace the source of the pollutants, and it is difficult to achieve real-time tracing. At the same time, the method of analyzing only based on the composition of the pollutants fails to consider the case where there are multiple potential pollution sources in some rivers, resulting in that the method of monitoring only based on the obtained samples is difficult to determine the specific location of the pollution source because the pollutants produced by different pollution sources can be mixed, so that the tracing accuracy is low.

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

[0004] In order to solve the problems of difficult real-time tracing and low tracing accuracy in the operation of tracing the source of river water pollution in the prior art, the application discloses a real-time tracing method for river water pollution, in particular:

[0005] A real-time tracing method for river water pollution, the method comprises:

[0006] Obtain the position of the pollution source of the river basin, and obtain the type of the pollutant discharged by the pollution source, obtain the pollutant particle parameters and the pollutant type;

[0007] Obtain the river connection relationship of the river basin, determine the input flow and output flow of the pollutant;

[0008] Based on the output flow of the pollutant, obtain the type of the pollutant of the river basin, and determine the input flow of the pollutant;

[0009] Based on the theoretical water flow velocity of the river basin and the pollutant particle parameters, obtain the theoretical pollutant level;

[0010] Based on the measured pollutant concentration and the measured water flow velocity, obtain the measured pollutant level;

[0011] Based on the measured pollutant level and the theoretical pollutant level, obtain the source of the pollutant.

[0012] Optionally, the pollution source position of the river basin is acquired, and the pollution type discharged by the pollution source is obtained, to obtain the pollution particle parameter and the pollution type, comprising:

[0013] The pollution source position of the river basin is acquired, and a corresponding relationship between the pollution source position and the rivers in the river basin is established, to obtain the pollution source-river relationship;

[0014] The pollution parameter discharged by the pollution source is acquired, to obtain the pollution particle parameter and the pollution type parameter of the pollution;

[0015] Based on the pollution source-river relationship, a corresponding relationship between the pollution particle parameter and the pollution type in the river is established, to obtain the river-pollution corresponding relationship.

[0016] Optionally, the river connection relationship of the river basin is acquired, and the input flow and the output flow of the pollution are determined, comprising:

[0017] Based on the river connection relationship of the river basin, the confluence point of the river basin is acquired;

[0018] Based on the confluence point of the river basin and the pollution source position of the river basin, the pollution input flow of the river basin is acquired;

[0019] Based on the pollution input flow and the confluence point position of the river basin, the output flow of the pollution is acquired.

[0020] Optionally, the output flow of the pollution is acquired based on the pollution input flow and the confluence point position of the river basin, comprising:

[0021] All the confluence points in the river basin are acquired, and the spatial position of the confluence point is obtained;

[0022] Based on the spatial position of the confluence point and the position of the confluence point in the river basin, the river position where the confluence point is located is obtained;

[0023] The water flow direction of all the rivers in the river basin is acquired, and the upstream and downstream rivers of the confluence point are acquired;

[0024] 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 pollution.

[0025] Optionally, the pollution type of the river basin is acquired based on the output flow of the pollution, and the possible input flow of the pollution is determined, comprising:

[0026] Based on the output flow of the pollution, the confluence point corresponding to the pollution output flow is acquired;

[0027] Based on the location of the confluence point, all upstream rivers of the confluence point are obtained;

[0028] The type of pollutant at the confluence point is obtained, and the upstream pollutant is obtained.

[0029] Based on the upstream pollutant and based on the river-pollutant correspondence relationship, the source river of the upstream pollutant is obtained, and the source river is the input flow of the pollutant.

[0030] Optionally, based on the theoretical water flow velocity of the river basin and the pollutant particle parameters, a theoretical pollutant level is obtained, including:

[0031] The water flow velocity of the river in the river basin is obtained, and the theoretical water flow velocity is obtained.

[0032] The pollutant particle parameters of the river in the river basin are obtained, and the theoretical pollutant particle parameters are obtained.

[0033] Based on the theoretical pollutant particle parameters and the theoretical water flow velocity, a theoretical pollutant settling depth is obtained, and the theoretical pollutant settling depth calculation equation is:

[0034]

[0035] wherein, represents the settling depth of the pollutant; represents the acceleration of gravity; represents the density of the pollutant particles; represents the water flow density; represents the particle size of the pollutant particles; represents the dynamic viscosity of the fluid, which is determined according to the water temperature; represents the distance between the pollution source and the hydrological detection device; represents the average speed of the distance between the pollutant and the hydrological detection device;

[0036] Based on the pollutant particle parameters, the settling depths of different pollutants are obtained, and a theoretical pollutant level is obtained.

[0037] Optionally, it further includes:

[0038] Based on the location of the hydrological detection device, the location of the hydrological detection device in the river basin is obtained, and the device location is obtained.

[0039] Based on the device location, the device location and the adjacent confluence point of the river in the same river basin are obtained.

[0040] Based on the water flow direction of the river in the river basin, the upstream confluence point and the downstream confluence point of the hydrological detection device are obtained.​

[0041] Establishing a correspondence between the hydrological detection device and the upstream confluence point and the downstream confluence point, to obtain a device-confluence point correspondence.

[0042] Optionally, the measured pollutant concentration and the measured water flow velocity are used to obtain a measured pollutant level, including:

[0043] Based on the hydrological detection device, the measured pollutant concentration and the measured water flow velocity of the river basin are obtained;

[0044] Based on the measured pollutant concentration and the measured water flow velocity, the pollutant weight is obtained, and the pollutant weight equation is:

[0045] ;

[0046] wherein, represents the pollutant weight; represents the measured pollutant concentration; represents the measured water flow density; represents the measured water flow velocity; represents the longitudinal cross-sectional area of the river; represents the flow time of the measured water flow;

[0047] Based on the pollutant weight, the measured pollutant settling depth of the measured pollutant at a theoretical water flow velocity is obtained, and the measured pollutant settling depth equation is:

[0048] ;

[0049] wherein, represents the measured pollutant settling depth; represents the measured fluid dynamic viscosity, determined according to the measured temperature of the water body; represents the theoretical water flow velocity; represents the measured average speed of the distance of the pollutant and the water source detection device;

[0050] Based on the pollutant particle parameters, the measured settling depth of different pollutants is obtained, to obtain a measured pollutant level.

[0051] Optionally, the measured pollutant level and the theoretical pollutant level are used to obtain the pollutant source, including:

[0052] Based on the measured stratification depth and the theoretical stratification depth, a stratification difference is obtained, and when the ratio of the stratification difference to a preset stratification difference exceeds a preset ratio, the pollutant type corresponding to the stratification difference is obtained, and the location of the hydrological detection device is obtained, to obtain a pollution basin.

[0053] acquire the upstream confluence point position of the polluted river basin, and acquire the measured stratified depth and the theoretical stratified depth of all the upstream confluence points to obtain the pollution condition of the upstream confluence point;

[0054] determine the pollution source based on the pollution condition of the upstream confluence point.

[0055] Optionally, the step of determining the pollution source based on the pollution condition of the upstream confluence point comprises:

[0056] acquire 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;

[0057] acquire the pollution source existing in the first polluted river based on the pollution source-river relationship to obtain the potential pollution source;

[0058] acquire the pollution particle parameter and the pollution type of the pollution discharged by the potential pollution source, and compare the pollution particle parameter and the pollution type corresponding to the measured pollution level to determine the pollution source position.

[0059] The present application comprises the following beneficial effects:

[0060] 1. The present application improves the timeliness of water pollution tracing. After the pollution source position of the river basin is determined, multiple detection devices are set in the river, and the input flow and the output flow of the pollution are determined, so that after the pollution type and the water density of the river water are acquired, the pollution stratification can be directly obtained based on the algorithm disclosed in the present application, and then the comparison between the theoretical pollution stratification and the measured pollution stratification is performed, so that the water pollution tracing is directly realized based on the positional relationship between the input flow and the output flow, and the timeliness is improved.

[0061] 2. The present application improves the accuracy of water pollution tracing. In the water pollution tracing of the present application, a comparison value, i.e. the stratification state of the pollution in the water, is set, and the theoretical stratification parameter and the measured stratification parameter are acquired. The measured stratification parameter is not obtained by setting sensors in each depth level of the river, but by setting some of the acquired measured river water parameters as the parameters applied in the determination of the theoretical stratification parameter, and the obtained stratification parameter is the measured stratification parameter. At this time, the direct comparison between the theoretical parameter and the measured parameter can be performed to determine the change of the pollution, and then the accurate tracing is performed based on the change.

[0062] 3. Reduce the environmental requirements when tracing water pollution. The river basin is likely to change the hydrological environment due to the existence of various factors, and such environmental changes often cause great changes in the stratification state of pollutants in the water body, and the stratification state disturbance caused by the environment is much larger than the spontaneous stratification resistance of pollutants in the water body. In the technical solution of the application, the actual measured data obtained is determined, and the measured parameters and the parameters used in the process of obtaining the theoretical stratification state are determined. Based on this method, when the hydrological environment changes, the stratification state that can be formed based on the measured data and the theoretical hydrological environment can also be obtained, so that the independent variables are unified in the measured results and the theoretical results, and the dependent variables have a comparison basis. BRIEF DESCRIPTION OF DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments of the present application or the prior art will be briefly introduced below. Obviously, the following description is only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor. The drawings are used to provide further understanding of the present disclosure and constitute a part of the specification, and are used to explain the present disclosure together with the following specific embodiments, but do not constitute a limitation on the present disclosure. In the drawings:

[0064] Figure 1 A river water pollution real-time tracing method flow chart provided by an embodiment of the present application;

[0065] Figure 2 A pollutant stratification result schematic diagram in a river water pollution real-time tracing method provided by an embodiment of the present application;

[0066] Figure 3 A river basin schematic diagram in a river water pollution real-time tracing method provided by an embodiment of the present application. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. In addition, in the embodiments of the present application, "first", "second", etc. are used to distinguish similar objects, not necessarily to describe a specific order or sequence.

[0068] Pollution tracing of river basin has become an important part of ecological protection work. In order to better avoid the current river basin pollution, it is necessary to improve the timeliness of river water pollution tracing. In the current tracing method, the main method is to take samples, then detect the samples in the laboratory to find the pollution parameters, and then trace back to the pollution source upstream to find the specific pollution source. Obviously, this method will consume more time, especially in complex water areas, such as sampling on the main stream of the river area, but there are many potential pollution sources in the upstream tributaries. At this time, specific pollution source investigation also needs to use other means to determine, and cannot be based on the detection method to obtain real-time, which will greatly reduce the timeliness of pollution tracing. In addition, for the specific tracing process, the concentration of the relevant pollutants in the sample is usually used to determine the change of the low pollution concentration allowed to exist in the current river basin, which makes it difficult to identify the real-time change of the pollution content. In addition, the pollution of the river basin is affected by many factors, such as precipitation, farmland overflow, etc. Especially, precipitation will change the flow rate of water body, and more vortex and turbulence will be generated in the water body, which will change the enrichment area of pollutants and reduce the detection accuracy of pollutants in the sample.

[0069] In the technical solution of the present application, factors that may cause changes in hydrological environment are processed to determine the theoretical pollution stratification state, and the measured pollution stratification is obtained by setting the measured parameters to the theoretical parameters in the theoretical pollution stratification state acquisition, and then the two parameters are compared to determine whether the pollution has changed. If the change occurs, the real-time and accurate tracing of the pollution is realized based on the river connection relationship and other information in the basin.

[0070] The present application discloses a real-time tracing method for river water pollution, which improves the real-time and accuracy of river water pollution tracing.

[0071] As shown in Figure 1 The present application provides a real-time tracing method for river water pollution, which includes the following steps:

[0072] S110, obtaining the position of the pollution source of the river basin, and obtaining the type of the pollution discharged by the pollution source, obtaining the pollution particle parameters and the type of the pollution;

[0073] S120, obtaining the river connection relationship of the river basin, and determining the input flow and output flow of the pollution;

[0074] S130, based on the output flow of the pollutants, obtaining the type of the pollutants of the river basin, determining the input flow of the pollutants;

[0075] S140, based on the theoretical water flow velocity of the river basin and the pollutant particle parameters, obtaining the theoretical pollutant level;

[0076] S150, based on the measured pollutant concentration and the measured water flow velocity, obtaining the measured pollutant level;

[0077] S160, based on the measured pollutant level and the theoretical pollutant level, obtaining the source of the pollutants.

[0078] The purpose of all the above steps is to confirm the location of the pollution source in the river basin, and to determine the type of the pollutants, especially the pollutant particle parameters and the pollutant species, to obtain the pollutant parameters that can be discharged by the pollution source, and then to obtain the input flow and the output flow, and to obtain the theoretical pollutant level and the measured pollutant level. For the measured pollutant level, in order to avoid the phenomenon that the stratification is not clear and the stratification is disturbed too much when the hydrological environment changes, which leads to the inability to determine the change of the pollutants, the hydrological environment in the measured pollutant stratification processing and the hydrological environment parameters in the theoretical pollutant stratification determination are set synchronously, and then the pollutants are analyzed, and based on the corresponding relationship between the river basin and the corresponding pollution source position, the precise tracing of the pollutants is realized.

[0079] In the following, the contents in all the above steps will be specifically explained as follows:

[0080] As described in step S110, the purpose of this step is to obtain the position of the pollution source in the river basin, and based on the position of the pollution source and the specific position of the river basin where it is located, the specific river where the pollution source is located is obtained, so that in the subsequent water pollution tracing, the pollution source that causes water pollution can be directly determined based on this corresponding relationship. Specifically:

[0081] S111, obtaining the position of the pollution source in the river basin, and establishing the corresponding relationship between the pollution source position and the river in the river basin, obtaining the pollution source-river relationship.

[0082] The purpose of this step is to obtain the corresponding relationship between the pollution source and the river, that is, to realize that the potential pollution source existing in the river can be determined based on the information of the river, which can be better used for the tracing of the pollution source position.

[0083] Among them, all the pollution sources in the river basin are obtained, including factories, farmland, mountains, etc., and all the pollution sources are labeled.

[0084] Wherein, after the pollution source is labeled, the position of the pollution source can be described by using the spatial coordinates.

[0085] Wherein, all river positions in the river basin can be obtained by setting labels for the rivers to obtain the information tags of the rivers and describe the rivers.

[0086] Wherein, based on the information tags 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 the influence relationship, the pollution source-river relationship is established between the pollution sources and the rivers.

[0087] In some embodiments, the pollution source is not located on the river bank, but has a certain distance from the river. By calculating the distance between the pollution source and the adjacent river, the pollution degree of the pollution source to the adjacent river is obtained, and the pollution source-river relationship is established based on the pollution degree. In this embodiment, a corresponding relationship needs to be established based on the specific influence degree, such as: the established pollution source-river relationship is “P1-R2(0.3)-R5(0.2)-R6(0.5)”, which means that the pollution source 1 can cause pollution to the rivers R2, R5 and R6, and the pollution degree weights are 0.3, 0.2 and 0.5 respectively, and in the distance representation, the distance ratio of the pollution source 1 to the rivers R2, R5 and R6 is 5:2:3.

[0088] S112, obtain the pollution parameter discharged by the pollution source to obtain the particle parameter and the pollution type parameter of the pollution.

[0089] The purpose of this step is to determine the type of pollution that the pollution source can produce, so that in the subsequent water pollution tracing, the type of pollution is obtained by identifying the pollution parameter obtained based on the downstream detection device, so as to perform the tracing operation on the pollution source.

[0090] Wherein, the type of pollution discharged by all pollution sources is determined, and the particle parameter of the pollution is obtained, and both parameters are included in the pollution type parameter area.

[0091] Wherein, for all pollution parameters, the type of pollution needs to be determined according to the current pollution source itself, so that in this case, all pollution type data are obtained.

[0092] In some embodiments, the corresponding relationship between the pollution source and the pollution type data is established.

[0093] S113, based on the pollution source-river relationship, establish the corresponding relationship between the pollution particle parameter and the pollution type in the river to obtain the river-pollution corresponding relationship.

[0094] The purpose of this step is to obtain the river-pollutant correspondence relationship, so that in the subsequent water pollution tracing, by obtaining the pollutant parameters in the water body, the upstream tracing is finally realized until the source river of the pollutant is found, and on this basis, the source of water pollution can be further determined based on the pollution source-river relationship.

[0095] Among them, the correspondence relationship between the two data is established directly based on the pollutant parameters and the river where the pollutant parameters are located.

[0096] In some embodiments, there may be multiple pollutants in the river, and the established river-pollutant relationship can be represented as "R1-p1-p2-p3", indicating that in the river R1, there are p1, p2 and p3 three kinds of pollutants, and for such pollutants, the allowed pollutant concentration and other parameters are explained.

[0097] As described in step S120, the purpose of this step is that for all rivers in the river basin, they are essentially connected, and for the pollutants existing therein, there will be mixing and accumulation effects of pollutants downstream, so by determining the input flow and output flow, the river where the pollutants appear can be determined based on the input flow and output flow. Specifically:

[0098] S121, based on the river connection relationship of the river basin, obtaining the confluence point of the river basin.

[0099] The purpose of this step is that for the entire river basin, there are a large number of river connection relationships, and the connection point of the river is actually the confluence point of the river basin. Based on the location of the confluence point, the connection relationship of all rivers can be obtained preliminarily, and the input flow and output flow of the pollutant can be obtained based on the water flow direction, so that the obtained river basin network is represented.

[0100] Among them, based on the connection relationship of all rivers in the river basin, the position of the connection point in the connection relationship is determined, so that the obtained connection point is set as the confluence point.

[0101] Among them, for the position determination of all confluence points, the position coordinates of the confluence point can be obtained to determine the analysis result.

[0102] In some embodiments, after the confluence points are obtained, the upstream and downstream relationships of all the confluence points can also be determined based on the water flow direction of the river, and are labeled, and the river can be expressed using the confluence point labels, such as: “A1—A2—A3—A4—C2—E9”, wherein the entire river contains 5 confluence points, the segments of the river between two confluence points represent the segments of the river, and E9 is a boundary point between different river basins and is not applied as a confluence point.

[0103] S122, based on the confluence points of the river basin and the location of the pollution source of the river basin, obtaining the input flow of the pollutant of the river basin.

[0104] The purpose of this step is to determine the pollution source for the corresponding pollution source in the confluence point area for all confluence points in the river basin, that is, for the confluence point, the river that inputs the pollutant to it can be used as the input flow, thereby determining the upstream pollution source of the confluence point based on the confluence point.

[0105] Wherein, based on the spatial coordinates of the confluence point, the river position where the confluence point is located is obtained, and all upstream rivers of the confluence point are determined as input flows.

[0106] Wherein, for each confluence point, except for the river corresponding to the most upstream confluence point in the entire river basin, the upstream rivers corresponding to other confluence points are input flows.

[0107] In some embodiments, the confluence point is only for the upstream segment of the river segment mentioned above, and the upstream segment is an input flow.

[0108] In some embodiments, the pollution source of the upstream river of the confluence point is obtained, and the river with the pollution source is the input flow of the confluence point.

[0109] In some embodiments, only the river with the pollution source is set as the input flow, and other rivers are not set as the input flow.

[0110] S123, based on the confluence points of the river basin and the location of the pollution source of the river basin, obtaining the input flow of the pollutant.

[0111] The purpose of this step is to determine all the output flows in the entire river basin, so as to meet the case that the river generates multiple tributaries in the confluence point area in the connection relationship of some rivers, thereby adapting to more river spatial distribution states. Specifically:

[0112] S1231, obtaining all the confluence points in the river basin and obtaining the spatial position of the confluence points.

[0113] The purpose of this step is to determine all confluence points in the entire river basin, obtain the spatial position of the confluence points, obtain the relative position relationship of the confluence points, obtain the flow direction relationship of the river, and realize the determination of the association relationship of the confluence points.

[0114] In this embodiment, all confluence points in the river basin are directly obtained, and then the spatial coordinates of the confluence points are obtained based on the coordinate system to describe the position of the confluence points.

[0115] In some embodiments, the position of the confluence point in the river is obtained, and the obtained position of the confluence point is the spatial position of the confluence point.

[0116] In some embodiments, the spatial position of the confluence point does not need to be accurately described, and only the relative position of the confluence point in the river is used for description.

[0117] S1232, based on the spatial position of the confluence point and the position of the confluence point in the river basin, obtaining the position of the confluence point in the river.

[0118] The purpose of this step is to obtain the spatial position of the confluence point and the position of the river, so as to obtain the position of the confluence point in the river, and then in the subsequent water pollution tracing, based on the position of the confluence point in the river, the corresponding relationship between water pollution and the relevant confluence point is determined, and the pollution source is traced based on the position of the confluence point.

[0119] In this embodiment, based on the spatial position of the confluence point and the river where the confluence point is located, the specific position of the confluence point in the river is obtained, and thus the position of the confluence point in the river is obtained.

[0120] In some embodiments, only the confluence point is considered to be at the starting point or the ending point of the river segment in the river basin, and is marked.

[0121] In some embodiments, based on all confluence points existing in the river, two adjacent confluence points in the same river are determined, the interval is determined and recorded, and the river position of the confluence point is described by the interval.

[0122] S1233, obtaining the flow direction of all rivers in the river basin, and obtaining the upstream and downstream rivers of the confluence point.

[0123] The purpose of this step is that, based on the flow direction of the river basin, the flow direction of all confluence points and the position of the confluence points can be determined, so that in this way, the upstream and downstream spatial positions of the confluence point are determined based on the flow direction, and then whether the confluence point has a corresponding output flow can be determined based on the upstream and downstream spatial positions.

[0124] Wherein, according to the water flow direction in all rivers in the river basin, the water flow direction in the water flow with the confluence point is determined, so as to determine the type of the confluence point.

[0125] Wherein, based on the water flow direction of the river, the upstream and downstream of the confluence point are determined, and the corresponding space corresponding to the upstream and downstream is obtained.

[0126] In some embodiments, according to the water flow direction, the water flow direction between adjacent confluence points is also determined, the water flow input into 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.

[0127] S1234, 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.

[0128] The purpose of this step is to determine the output flow of the confluence point based on the upstream and downstream space positions of all confluence points, because the water flow output direction of the confluence point is obviously downstream of the confluence point, so in the specific processing, the output flow of the confluence point can be obtained.

[0129] Wherein, the pollutant input flow and the position of the confluence point are obtained, and for the downstream river of the confluence point, it is set as the output flow.

[0130] In some embodiments, the downstream river of the confluence point is divided into no less than two tributaries, and the output flow is labeled for each tributary.

[0131] In some embodiments, for the case where there are multiple tributaries, the corresponding relationship between the established confluence point and the output flow is also determined according to the flow of different tributaries to determine the weight of the tributary, such as "C2-C1(0.4)-C3(0.6)", which means that the confluence point C2 corresponds to C1~C2 and C3~C2 two tributaries, and the flow ratio of the two tributaries is 2:3.

[0132] Wherein, in fact, all the input flows in the river basin are potential pollutant input flows, by determining such input flows, it can be determined whether there is a pollutant in the input flow of the pollutant, so as to trace the pollutant.

[0133] As described in step S130, the purpose of this step is that the output of pollutants in the output flow of each type of pollutant is mixed and accumulated downstream of the confluence point, so it is necessary to obtain the confluence point corresponding to the pollutant output flow based on the connection relationship of the output flow, and obtain the source of all pollutants, wherein the input flow and the output flow of the pollutant are actually rivers in the river basin, and they have different names in different regions, for example: the labels of two rivers connected with each other are 1 and 2 respectively, 1 is polluted, at this time, 1 is the output flow of the pollutant, and for 2, 1 becomes its input flow of the pollutant, in order to avoid ambiguity, the input flow and the output flow are specified. Specifically:

[0134] S131, based on the output flow of the pollutant, obtaining the confluence point corresponding to the pollutant output flow.

[0135] The purpose of this step is that some confluence points in the river basin may correspond to multiple river tributaries, wherein all the rivers where the river tributaries are located belong to the output flow, so in the specific processing process, the most downstream confluence point of the corresponding output flow needs to be obtained, and if the water body in the confluence point region is polluted, all the pollution sources upstream of the confluence point region may cause pollution to the confluence point region.

[0136] Among them, the spatial position of all confluence points and the river connection relationship corresponding to the confluence points are determined to determine the source of the input water flow of the confluence point.

[0137] Among them, for the confluence point corresponding to the pollutant input flow, the corresponding relationship between the confluence point and the pollutant output flow can be obtained, such as the established corresponding relationship “R10: C1-C2, A4-C2”, which indicates that the pollutant output flow corresponding to the confluence point C2 is the river between C1-C2 and A4-C2.

[0138] In some embodiments, for the established corresponding relationship of the confluence point, all the confluence points contained in the corresponding all pollutant output flows of the confluence point are obtained to form a confluence point cluster.

[0139] S132, based on the position of the confluence point, obtaining all upstream rivers of the confluence point.

[0140] The purpose of this step is to determine the position data of the confluence point, and the corresponding relationship between the confluence point and the output flow, and obtain all the upstream rivers corresponding to the confluence point, so that after determining the pollution of the confluence point, the corresponding relationship between the confluence point and the upstream river can be used for reverse tracing.

[0141] Among them, the position of the confluence point is obtained, and all the confluence points in the upstream river of the confluence point are obtained to obtain the confluence point cluster, which is specifically described in step S131, and will not be repeated here.

[0142] wherein, for the confluence point that has been acquired, the input flow for such confluence point also needs to be acquired synchronously, so as to obtain the upstream river of the confluence point.

[0143] S133, acquiring the pollutant type of the confluence point, to obtain the upstream pollutant.

[0144] The purpose of this step is to obtain the pollutant type detection result in the confluence point area, and the pollutant present therein obviously originates from the upstream of the confluence point, and based on the pollutant type, the tracing operation can be performed in combination with all the pollution sources in the upstream and the pollutant type.

[0145] wherein, for the confluence point area, a pollutant detection device is arranged to acquire the pollutant type in the confluence point area, which is commonly a particle size detection device, a particle size concentration detection device, etc.

[0146] wherein, the pollutant detection device arranged in the confluence point area can be configured in a small range upstream or downstream of the confluence point, so as to avoid the complex hydrological environment of the confluence point area, and to avoid the difficulty in ensuring the accurate identification and measurement of the pollutant.

[0147] In some embodiments, the pollutant detection device is arranged within a reasonable range, and the pollutant type and concentration upstream and downstream of the confluence point are acquired at the same time, and the inflow of different pollutants in the confluence point area is acquired by taking the difference between the two values.

[0148] S134, based on the upstream pollutant and based on the river-pollutant correspondence relationship, acquiring the source river of the upstream pollutant, the source river being the input flow of the pollutant.

[0149] The purpose of this step is to, after determining the pollutant type parameter of the confluence point area and the upstream and downstream relationship of the pollutant, based on the pollutant category information and the river-pollutant correspondence relationship, to acquire the input flow.

[0150] wherein, when water pollution occurs in the confluence point area, the pollutant category data is acquired, and then the river-pollutant correspondence relationship is directly used to determine the river where the pollutant may originate from.

[0151] wherein, after the river where the pollutant may originate from is acquired, the corresponding river of the pollutant is directly found, and is marked in the river basin.

[0152] wherein, the pollutant type of the river where the pollutant may originate from is acquired, and the river where the pollutant emission increases is found from the pollutant type, so as to determine the input flow of the pollutant.

[0153] In some embodiments, after determining the pollutant category of the confluence point, all upstream rivers corresponding to the confluence point are obtained, and the pollutant category parameters of all upstream rivers are obtained. When the pollutant or the pollutant parameter rises, the corresponding upstream river is the input stream of the pollutant.

[0154] In some embodiments, the input stream corresponding to the confluence point is directly set as the input stream of the pollutant.

[0155] As described in step S140, the purpose of this step is to obtain the situation of the theoretical pollutant level, so that the compared basis in various types of tracing values can be set in real-time water pollution tracing operation, and the core technical solution of the present application can be realized, that is, based on the comparison between the theoretical pollutant level and the measured pollutant level, it is determined whether water pollution occurs. Specifically:

[0156] S141, obtaining the water flow speed of the river in the river basin to obtain the theoretical water flow speed.

[0157] The purpose of this step is that for the pollutant in the river basin, the pollutant will appear to settle in the water body, and the settling depth and the water flow speed have a certain relationship. In addition, the overall technical concept of the present application is not to directly set a pollutant detection device in the pollution source area, but to determine the accumulation position of the pollutant based on the mixing and clustering effect of the pollutant, and to trace based on this parameter. Therefore, in the specific processing, it is necessary to be able to obtain the theoretical water flow speed.

[0158] Among them, the water flow speed in the area where the water flow speed is relatively slow and stable is measured, and the water flow speed is determined as the theoretical water flow speed.

[0159] In some embodiments, the water flow speed of the confluence point area is obtained, and the area is measured under normal conditions of the river, so as to obtain the water flow speed of the area.

[0160] In some embodiments, the water flow speeds of a plurality of sampling points in the river are measured, and the average value is calculated to obtain the average value as the theoretical water flow speed.

[0161] Among them, the theoretical water flow speed of the present application is not a theoretical value, but a relative value which can be selected based on actual measurement. For example, the water flow speed measured in the area where the water flow is relatively slow and stable is set as the theoretical water flow speed, which is directly set based on the measurement result. In another river, the water flow speed in the stable state of the river is obtained as the theoretical water flow speed in the tributary.

[0162] S142, obtaining the pollutant particle parameter of the river in the river basin to obtain the theoretical pollutant particle parameter.

[0163] The purpose of this step is to associate the settling speed of the pollutants in the river with the particle size of the pollutant particles, so that the particle size of different pollutant particles is obtained, and then the particle size parameter is used to calculate the theoretical pollutant level.

[0164] Among them, the types of pollutants discharged by various pollution sources are obtained, and then the particle size of this type of pollutants is determined, so that the obtained value is used as the theoretical pollutant particle parameter.

[0165] In some embodiments, the pollutants of the pollution source are sampled and detected and measured, so as to obtain the theoretical pollutant particle parameters corresponding to all pollutants in the area.

[0166] In some embodiments, the sampling operation is performed on the area where the river flow velocity is gentle, and the sample is detected to obtain the theoretical pollutant particle parameter in the water flow, and the parameter is used as the final result.

[0167] In some embodiments, if a new pollution source appears, the generated pollutant sample is obtained, and the pollutant particle parameter is obtained.

[0168] Among them, the theoretical pollutant particle parameter is the particle size of the pollutant determined based on the type of pollutant that the pollution source may discharge, and the particle size is directly used as the theoretical pollutant particle parameter. For example: the typical pollutant particle size discharged by a pollution source is a The value is set as the theoretical pollutant particle parameter.

[0169] S143, based on the theoretical pollutant particle parameter and the theoretical water flow velocity, a theoretical pollutant settling depth is obtained, and the theoretical pollutant settling depth calculation equation is:

[0170] ;

[0171] Among them, represents the settling depth of the pollutant; represents the acceleration of gravity; represents the density of the pollutant particle; represents the density of the water flow; represents the particle size of the pollutant particle; represents the fluid dynamic viscosity, which is determined according to the water temperature; represents the distance between the pollution source and the hydrological detection device; represents the average speed of the distance between the pollutant and the hydrological detection device.

[0172] The purpose of this step is to measure the settling depth of pollutants at the location of the hydrological detection device for all pollutants, and the theoretical pollutant level can be obtained by superimposing the river section of different pollutant settling depths, that is, only when the pollutant settling depth is obtained, the theoretical pollutant level can be obtained.

[0173] Wherein, based on the hydrological detection device, the water flow density is obtained, in the current technical means, the water flow density can be directly measured by using the corresponding hydrological measurement device, and the device that can be used in the process is not limited.

[0174] Wherein, for the density of the pollutant particles, sampling is reasonably performed to ensure accuracy, and the density of the pollutant particles is measured based on laboratory detection work, so as to obtain the result.

[0175] Wherein, for the fluid dynamic viscosity, it is related to the temperature of the water flow, and the specific relationship equation is:

[0176] ;

[0177] Wherein, A and B are constants, respectively 0.02411 and 247.8, T represents the absolute temperature of water, which can be directly measured in the layered calculation in the specific processing, of course, when the hydrological parameters of the river change, the parameter can be calculated according to the temperature in the theoretical layered parameter.

[0178] S144, based on the pollutant particle parameters, the settling depth of different pollutants is obtained, and the theoretical pollutant level is obtained.

[0179] The purpose of this step is to obtain the theoretical pollutant level based on the obtained pollutant settling depth, and the layered relationship can be established based on the settling depth value, so as to obtain the standard value for comparison.

[0180] Wherein, for the obtained pollutant settling depth, the layered state of all pollutants on the longitudinal section of the river is established, as shown in Figure 2 The pollutant layering result schematic diagram in the river water pollution real-time tracing method provided by the embodiment of the application, wherein L1~L5 are the layered states of different pollutants, and the pollutants in different levels are also recorded in the established theoretical pollutant layering data, so as to obtain the theoretical pollutant layering result.

[0181] In some embodiments, for the obtained theoretical pollutant stratification relationship, a numerical relationship is directly explained, and it is not necessary to draw a longitudinal section of the river in a specific processing process.

[0182] S145, based on the position of the hydrological detection device, obtaining the river position of the hydrological detection device in the river basin of the river, obtaining the device position.

[0183] The purpose of this step is that, as mentioned above, the flow distance of the river pollutant needs to be obtained in the stratification equation, which is obviously difficult to directly measure, so in the specific processing, the river position of the hydrological detection device in the river basin can be determined.

[0184] Among them, the spatial coordinates of the hydrological detection device are obtained, and the device position is determined based on the coordinate parameters, so as to realize the description of the spatial position.

[0185] In some embodiments, the spatial coupling relationship of the hydrological detection device on the river is directly obtained, so as to obtain the position of the hydrological detection device in the river, and the position of the hydrological detection device is described.

[0186] S146, based on the device position, obtaining the device position and the adjacent confluence point of the river in the same river basin.

[0187] The purpose of this step is that there are a large number of hydrological detection devices, but a large number of devices are unevenly distributed in the river basin, and the distance between different hydrological detection devices is different. In order to facilitate the subsequent river water pollution tracing, it is necessary to determine the spatial position relationship of the hydrological detection device in the running process, so as to be used for tracing.

[0188] Among them, the correlation between the hydrological detection device and the corresponding river is determined, and the hydrological detection device on the same river is set with an identifier.

[0189] Among them, the device position and the adjacent confluence point of the river in the river basin are determined, so as to determine the adjacent confluence point of the current hydrological detection device, and to determine the running relationship between the hydrological detection device and the adjacent confluence point.

[0190] S147, 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.

[0191] The purpose of this step is that the hydrological detection device is only used for parameter acquisition of the water body, and does not need to complete the calculation work of the related parameters, and in actual operation, the upstream confluence point of the hydrological detection device is obviously the input flow of the pollutant, and the downstream is the output flow. If it is found that there is a pollutant or the content of the pollutant 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, the corresponding relationship between the confluence point and the hydrological detection device is established.

[0192] The flow direction of the water at the position of the hydrological detection device is obtained, so as to determine the upstream and downstream directions of the hydrological detection device.

[0193] The upstream and downstream confluence points in the river where the hydrological detection device is located are determined based on the spatial corresponding relationship between the river and the confluence point, so as to determine the upstream and downstream relationship of the confluence point.

[0194] The information label of the hydrological detection device is established, and then the label of the upstream and downstream confluence points of the hydrological detection device and the information label of the hydrological detection device are established into a data group, so as to indicate the upstream and downstream confluence points corresponding to the hydrological detection device. As shown in Figure 3 The dotted line part is the boundary line of the river basin, the solid line is the river, and all the solid lines are confluence points. According to the position of the confluence point, the confluence point is identified, and the pollution source on the river segment between the two confluence points is determined, so as to obtain various corresponding relationships.

[0195] S148, the corresponding relationship between the hydrological detection device and the upstream confluence point and the downstream confluence point is established, and the device-confluence point corresponding relationship is obtained.

[0196] The purpose of this step is that the corresponding relationship between the hydrological detection device and the upstream and downstream confluence points has been obtained, and the established corresponding relationship can be directly used for water pollution tracing.

[0197] The information label corresponding relationship between the hydrological detection device and the upstream and downstream is established, and the associated upstream and downstream confluence points of each hydrological detection device are obtained, such as "A1-M1-A2", wherein it is indicated that there is a hydrological detection device M1 between the confluence points A4 and A5.

[0198] In some embodiments, the spacing of the upstream and downstream confluence points is long, and multiple hydrological detection devices are arranged in the river. At this time, for the middle hydrological detection device, it is regarded as a confluence point for the construction of the correlation relationship, such as "A4-M5-M6-M7-M8-C2", wherein M5~M8 four hydrological detection devices exist in the river between A4 and C2, and the whole is sorted according to the water flow direction. The hydrological detection device is not shown in the attached Figure 3 , but can be determined by the direction of the water flow. In addition, the numbering of the hydrological detection device is not limited, and the configuration label of the hydrological detection device that has been set can be simply based on.

[0199] As described in step S150, the purpose of this step is to obtain the water flow information based on the hydrological detection device, in which there may be changes in parameters, so in the specific processing, it may not form a clear layering, and the parameter change can easily cause great influence on the hierarchical distribution state, so in the specific processing, it also needs to be able to eliminate the influence of the changed parameters on the final layering calculation result based on the real-time measured parameters. Specifically:

[0200] S151, based on the hydrological detection device, obtaining the measured pollutant concentration and the measured water flow velocity of the river basin.

[0201] The purpose of this step is to analyze the pollution existing in the current river in real-time source tracing of river water pollution, which naturally needs to be determined based on actual detection, and because different pollution sources produce different water pollution, it is also necessary to obtain the results based on the measured values, and then process them, so in the specific processing, it is necessary to obtain related numerical values based on the parameters required in the pollutant hierarchical distribution calculation.

[0202] Among them, for the selected hydrological detection device, it can measure water density, pollutant particle parameters and other parameters to obtain related parameters.

[0203] In some embodiments, the selected hydrological detection device can also obtain the water flow velocity and the water temperature.

[0204] S152, based on the measured pollutant concentration and the measured water flow velocity, obtaining the pollutant weight, and the pollutant weight equation is:

[0205] ;

[0206] Among them, represents the weight of the pollutant; 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 measured water flow time.

[0207] The purpose of this step is to obtain the weight of the pollutant based on the concentration parameter and the measured water flow velocity for the obtained measured pollutant parameter. In fact, for a water body, it itself belongs to a solution, and therefore in the specific processing, by calculating the weight of the pollutant, the concentration of the solution can be obtained.

[0208] Among them, for the concentration of the pollutant, it can be obtained based on the hydrological detection device. At present, various devices have been developed, and the present application does not limit this technology.

[0209] In some embodiments, for the hydrological detection device, it is responsible for the satellite, so that the satellite can be directly used to directly obtain the parameters such as the type of pollutant, the diameter of the pollutant particle, etc.

[0210] S153, based on the weight of the pollutant, obtaining the measured pollutant settling depth of the measured pollutant under the theoretical water flow velocity, and the measured pollutant settling depth equation is:

[0211] ;

[0212] Among them, represents the measured pollutant settling depth; represents the measured fluid dynamic viscosity, which is determined according to the measured temperature of the water body; represents the theoretical water flow velocity; represents the measured average speed of the distance of the pollutant and the water source detection device.

[0213] The purpose of this step is to process the obtained pollutant detection results, so as to obtain the measured pollutant level. The reason for using this method is that when the hydrological parameters change, such as precipitation, farmland water leakage, the water in the river cannot actually form a stable stratification. In this case, it is difficult to accurately distinguish the pollutants in the water body for all types and proportions of pollutants, which means that it is difficult to distinguish the change value of a certain pollutant based on the change degree of the type of pollutant, and then accurately trace the source. Therefore, in the specific processing, the measured parameters also need to be processed.

[0214] Among them, for the obtained measured parameters, based on the pollutant concentration parameter, the pollutant settling depth under the measured hydrological parameter is obtained in the measured river parameter, so as to obtain the measured pollutant level.

[0215] Wherein, the measured water flow velocity and the measured fluid dynamic viscosity under the temperature environment are obtained to determine the current specific pollutant settling depth.

[0216] In some embodiments, the measured fluid dynamic viscosity and the water flow velocity are also applied according to the calculation parameters of the theoretical pollutant settling level, so as to obtain better comparison results.

[0217] S154, based on the pollutant particle parameters, obtaining the measured settling depth of different pollutants to obtain the measured pollutant level.

[0218] The purpose of this step is to obtain specific measured pollutant levels, so as to compare the obtained measured results with the theoretical results to obtain more accurate results.

[0219] Wherein, for the obtained measured pollutant settling depth, a measured pollutant level image is directly formed.

[0220] In some embodiments, the measured pollutant level image is not established, but a numerical value is directly formed, so as to perform numerical comparison.

[0221] As described in step S160, the purpose of this step is to determine the specific parameter of the changed pollutant parameter based on the comparison parameter through comparison of the theoretical pollutant level and the measured pollutant level, so as to determine the type of the changed pollutant according to the parameter, and the water pollution basin, and then realize real-time tracing of water pollution. Specifically:

[0222] S161, based on the measured layering depth and the theoretical layering depth, obtaining a layering difference value, when the ratio of the layering difference value to the preset layering difference value exceeds the preset ratio, obtaining the pollutant type corresponding to the layering difference value, and obtaining the position of the hydrological detection device to obtain the pollution basin.

[0223] The purpose of this step is that by obtaining the pollutant type and the pollution basin, two parameters can be obtained at the same time, i.e., the basin where water pollution problem occurs and the type of the 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 obtained river where the pollution source is located, to obtain the processing result.

[0224] Wherein, all level parameters in the obtained theoretical pollutant level and the measured pollutant level are compared, so as to obtain the parameter change of each level and obtain the layering parameter corresponding to the layering.

[0225] Wherein, based on the pollutant corresponding to the level, the type of the changed pollutant in the current water pollution is determined to determine the pollutant that has appeared in the river or the increased pollutant.

[0226] wherein, based on the measured pollutant level and the corresponding position of the theoretical pollutant level, the position where the water pollution phenomenon occurs is directly obtained, and the river where the position is located is the pollution watershed.

[0227] S162, the upstream confluence point position of the pollution watershed is obtained, and the measured stratified depth and the theoretical stratified depth of all the upstream confluence points are obtained to obtain the pollution situation of the upstream confluence point.

[0228] The purpose of this step is to trace the pollution source after determining the water pollution, so it is necessary to obtain the type of pollutant in the current water body to determine it. The core idea of the present application is to determine the pollution source based on the confluence point in the river, that is, to segment the river, then obtain whether each segment is subjected to water pollution, and find the pollution source based on the determined segment.

[0229] wherein, after determining the pollution watershed, the upstream confluence point of the watershed is determined, and it is determined whether the confluence point region exists water pollution.

[0230] wherein, for the water pollution analysis of the upstream confluence point, the steps of step S161 are the same, which will not be repeated here.

[0231] wherein, when it is determined that the upstream confluence point region exists pollution, it is determined that the input flow corresponding to the upstream confluence point is subjected to pollution, and the potential pollution source existing in the upstream river segment may become the actual pollution source.

[0232] wherein, based on the analysis of the water pollution situation 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.

[0233] In some embodiments, for all confluence points on the entire path, after it is found that there is water pollution, all potential pollution sources on the path are analyzed, and the composition of the pollutant is determined, so as to find out whether all pollution sources on the entire path cause water pollution, so as to ensure that in the case of the existence of multiple pollution sources at the same time, the confirmation of all pollution sources can be realized.

[0234] S163, based on the pollution situation of the upstream confluence point, the source of the pollutant is determined.

[0235] The purpose of this step is to find the most upstream confluence point where water pollution occurs based on the pollution situation of all upstream confluence points, and the river in the region of the most upstream confluence point and its adjacent downstream confluence point is the pollution source of the entire river watershed. The potential pollution source in the river segment may cause water pollution. Specifically:

[0236] S1631, obtaining the most upstream confluence point suffering from pollution, and setting the river between the most upstream confluence point and the adjacent upstream confluence point as the first polluted river.

[0237] The purpose of this step is that after obtaining the most upstream confluence point suffering from pollution, 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 the river section, further detection is needed to determine the specific pollution source. That is, the determination of the first polluted river can lay the foundation for the subsequent determination of the pollution source.

[0238] Among them, based on the determination of the current pollution area, the upstream confluence point of the pollution area is determined, and the pollution situation of its adjacent upstream confluence point is obtained, and it is determined whether the upstream confluence point is polluted.

[0239] Among them, based on the method of the previous step, the upstream confluence point where the pollutant may exist is determined, and when there is no water pollution in a certain upstream confluence point, the upstream confluence point is set as the most upstream confluence point.

[0240] Among them, the determination of the first polluted river is based on the related content in the above steps. In a simple understanding way: Figure 3 For example, each confluence point is labeled, and in the technical solution of the present application, E1-E10 represents the intersection point between the river basin and the non-region, and in the determination of the first polluted river, a sensor between D2 and A7 finds that there is a pollutant, at this time, it is analyzed whether D2 is polluted, and after finding that D2 is polluted, the upstream confluence point of D2 is obtained, which is D1. After finding that D1 is polluted, it is analyzed again whether the upstream confluence point A6 is polluted, and it is found that there is still pollution. Then A5 is selected for further analysis of the pollutant, and when it is found that there is still pollution, the pollutant of A4 is judged, and when it is found that A4 has no pollutant, A5 is taken as the most upstream confluence point suffering from pollution, and the first polluted river is the river between A4 and A5.

[0241] S1632, based on the pollution source-river relationship, obtaining the pollution source existing in the first polluted river to obtain the potential pollution source.

[0242] The purpose of this step is that after obtaining the most upstream confluence point suffering from pollution, 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 the river section, further detection is needed to determine the specific pollution source. That is, the determination of the first polluted river can lay the foundation for the subsequent determination of the pollution source.

[0243] Among them, according to the river which has been determined to be the first to suffer pollution, the pollution source existing on the river is determined.

[0244] Among them, for the pollution source existing on the river, in fact, these pollution sources may not necessarily cause water pollution problems, therefore, it is not directly determined that the pollution source on the river can be determined, but all the pollution sources existing on the 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 first polluted river, all the pollution sources between the rivers are set as potential pollution sources.

[0245] S1633, obtain the pollution particle parameters and pollution types of the pollution discharged by the potential pollution source, and compare the pollution particle parameters and pollution types corresponding to the measured pollution level to determine the position of the pollution source.

[0246] The purpose of this step is to determine whether the water pollution problem really occurs for all the obtained potential pollution sources, and then determine the specific pollution source, so as to obtain accurate pollution source information.

[0247] Among them, for the pollution source based on the obtained pollution type, the pollution source is compared based on the obtained measured pollution level data, and for the obtained comparison result, the source of the measured pollution is determined. For example, for all the potential pollution sources before A4 and A5, they are detected and analyzed respectively, so as to obtain the specific pollution source.

[0248] In some embodiments, for all the existing potential pollution sources, the pollution they may discharge is recorded, and then the pollution data is recorded, then in the specific real-time tracing, the obtained measured pollution level data is compared with the recorded pollution data, so as to determine the actual source of the pollution.

[0249] In some embodiments, when it is found that the pollution which is not recorded in the database appears in the river, or the change rate of the pollution content is much higher than the water pollution amplitude that the known potential pollution source can cause, the pollution needs to be identified, and the relevant river basin is investigated to determine the type of the pollution source and record it.

[0250] The present application includes the following beneficial effects:

[0251] 1. Improved timeliness of water pollution source tracing. After determining the location of pollution sources in a river basin, multiple detection devices are installed in the river, and the input and output flows of pollutants are identified. This ensures that after obtaining the pollutant types and water density of the river water, pollutant stratification can be directly obtained based on the algorithm disclosed in this application. Then, by comparing the theoretical and measured pollutant stratification, and based on the positional relationship of the input and output flows, water pollution source tracing can be directly achieved, significantly improving timeliness.

[0252] 2. Improved accuracy in tracing the source of water pollution. This application establishes a comparison value in tracing the source of river water pollution: the stratification state of pollutants in the water body. This allows for the acquisition of theoretical and measured stratification parameters. The measured stratification parameters are not obtained by setting sensors at each depth level of the river, but rather by setting some of the measured river water parameters as the parameters used in determining the theoretical stratification parameters. The resulting stratification parameters are the measured stratification parameters. A direct comparison between the theoretical and measured parameters can then be made to determine the changes in pollutants, enabling precise source tracing based on these changes.

[0253] 3. Reduced environmental requirements for water pollution source tracing. River basins are likely to experience changes in their hydrological environment due to various factors. These environmental changes often lead to significant alterations in the stratification of pollutants in the water, and the resulting disturbances in stratification are far greater than the spontaneous stratification resistance of pollutants in the water. In the technical solution of this application, the measured parameters and the parameters used in the theoretical stratification process are determined from the actual measured data. Based on this method, even when the hydrological environment changes, the stratification state that can be formed under measured data and theoretical hydrological conditions can be obtained. This achieves a unification of the independent variable in the obtained measured results and theoretical results, thus providing a basis for comparison of the dependent variable.

[0254] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by related hardware of computer program instructions. The aforementioned computer program can be stored in a nonvolatile storage medium, and when executed, the computer program executes steps including the above-mentioned method embodiments. Alternatively, the aforementioned integrated units of the present application, if implemented in the form of software function modules and sold or used as independent products, can also be stored in a nonvolatile storage medium. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product, which is stored in a nonvolatile storage medium and includes a number of 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 application.

[0255] The above merely describes the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A real-time river water pollution tracing method, characterized in that, The method comprises: acquiring the pollution source position of the river basin, and obtaining the pollutant type discharged by the pollution source, the pollutant particle parameter and the pollutant type; acquiring the river connection relationship of the river basin, and determining the input flow and output flow of the pollutant; based on the output flow of the pollutant, acquiring the pollutant type of the river basin, and determining the input flow of the pollutant; based on the theoretical water flow velocity of the river basin and the pollutant particle parameter, acquiring the theoretical pollutant level, comprising: acquiring the water flow velocity of the river in the river basin to obtain the theoretical water flow velocity; acquiring the pollutant particle parameter of the river in the river basin to obtain the theoretical pollutant particle parameter; based on the theoretical pollutant particle parameter and the theoretical water flow velocity, obtaining the theoretical pollutant settling depth, and the theoretical pollutant settling depth calculation equation is: ， wherein, H t represents the depth of pollutant settling; represents the acceleration due to gravity; represents the density of pollutant particles; represents the density of water flow; d represents the size of pollutant particles; represents the dynamic viscosity of the fluid, determined according to the temperature of the water body; represents the distance of the pollution source and the hydrological detection device; represents the average speed of the distance of the pollution source and the hydrological detection device; based on the pollutant particle parameter, acquiring the settling depth of different pollutants to obtain the theoretical pollutant level; based on the measured pollutant concentration and the measured water flow velocity, acquiring the measured pollutant level, comprising: based on the hydrological detection device, acquiring 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, acquiring the weight of the pollutant, and the weight equation of the pollutant is: ， wherein, represents the weight of the pollutant; represents the measured concentration of the pollutant; represents the measured value of the water flow density; represents the measured value of the water flow velocity; represents the longitudinal cross-sectional area of the river; represents the measured value of the flow time of the water flow; based on the weight of the pollutant, acquiring the measured pollutant settling depth of the measured pollutant under the theoretical water flow velocity, and the measured pollutant settling depth equation is: ， wherein, represents the measured depth of pollutant settlement; represents the measured kinematic viscosity of the fluid, determined from the measured temperature of the body of water; represents the theoretical water flow rate; represents the measured average speed of the pollutant and water source detection device over the course; based on the pollutant particle parameter, acquiring the measured settling depth of different pollutants to obtain the measured pollutant level; based on the measured pollutant level and the theoretical pollutant level, acquiring the pollutant source, comprising: based on the measured layering depth and the theoretical layering depth, acquiring the layering difference, when the ratio of the layering difference and the preset layering difference exceeds the preset ratio, acquiring the pollutant type corresponding to the layering difference, and acquiring the position of the hydrological detection device to obtain the pollution basin; acquiring the upstream confluence point position of the pollution basin, and acquiring the measured layering depth and the theoretical layering depth of all the upstream confluence points to obtain the pollution situation of the upstream confluence point; based on the pollution situation of the upstream confluence point, determining the pollutant source.

2. The river water pollution real-time tracing method according to claim 1, characterized in that, The method comprises: acquiring the pollution source position of the river basin, and establishing the corresponding relationship between the pollution source position and the river in the river basin to obtain the pollution source-river relationship; acquiring the pollutant parameter discharged by the pollution source to obtain the particle parameter and the pollutant type parameter of the pollutant; based on the pollution source-river relationship, establishing the corresponding relationship between the pollutant particle parameter and the pollutant type in the river to obtain the river-pollutant corresponding relationship.

3. The river water pollution real-time tracing method according to claim 1, characterized in that, The method comprises: based on the river connection relationship of the river basin, acquiring the confluence point of the river basin; acquiring a pollutant input flow of the river basin based on the confluence points of the river basin and locations of pollution sources of the river basin; acquiring an output flow of the pollutant based on the pollutant input flow and the location of the confluence point of the river basin.

4. The river water pollution real-time tracing method according to claim 3, characterized in that, The acquiring of the output flow of the pollutant based on the pollutant input flow and the location of the confluence point of the river basin comprises: acquiring all confluence points in the river basin and obtaining spatial locations of the confluence points; obtaining river locations of the confluence points based on the spatial locations of the confluence points and locations of the confluence points in the river basin; acquiring water flow directions of all rivers in the river basin and acquiring upstream and downstream rivers of the confluence points; setting downstream rivers of the confluence points as the output flow of the pollutant based on the upstream and downstream rivers of the confluence points.

5. The river water pollution real-time tracing method according to claim 1, characterized in that, The acquiring of the pollutant type of the river basin based on the output flow of the pollutant and the determination of the possible input flow of the pollutant comprise: acquiring the confluence point corresponding to the output flow of the pollutant based on the output flow of the pollutant; acquiring all upstream rivers of the confluence point based on the location of the confluence point; acquiring a pollutant type of the confluence point to obtain an upstream pollutant; acquiring a source river of the upstream pollutant based on the upstream pollutant and based on the river-pollutant correspondence relationship, the source river being the input flow of the pollutant.

6. The river water pollution real-time tracing method according to claim 1, wherein, Further comprising: obtaining a river location of the hydrological detection device in the river basin based on the location of the hydrological detection device to obtain a device location; acquiring a neighboring confluence point of the device location and a river in the same river basin based on the device location; acquiring an upstream confluence point and a downstream confluence point of the hydrological detection device based on water flow directions of the rivers in the river basin; establishing a correspondence relationship between the hydrological detection device and the upstream confluence point and the downstream confluence point to obtain a device-confluence point correspondence relationship.

7. The river water pollution real-time tracing method according to claim 1, characterized in that, The determination of the pollution source based on the pollution situation of the upstream confluence point comprises: acquiring a most upstream confluence point suffering from pollution and setting a river between the most upstream confluence point and a neighboring upstream confluence point as a first polluted river; acquiring a pollution source existing in the first polluted river based on the pollution source-river relationship to obtain a potential pollution source; comparing a pollutant particle parameter and a pollutant type of a pollutant discharged by the potential pollution source with a pollutant particle parameter and a pollutant type corresponding to the measured pollutant level to determine a pollution source location.

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