CN116539489B - Accurate monitoring method for sediment content of water flow section under different liquid level flow states of rainwater pipe network - Google Patents
Accurate monitoring method for sediment content of water flow section under different liquid level flow states of rainwater pipe network Download PDFInfo
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- 239000013049 sediment Substances 0.000 title claims abstract description 76
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000012544 monitoring process Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000007788 liquid Substances 0.000 title claims abstract description 31
- 238000013178 mathematical model Methods 0.000 claims abstract description 12
- 238000007689 inspection Methods 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 19
- 238000012806 monitoring device Methods 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000002689 soil Substances 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 abstract 1
- 238000011158 quantitative evaluation Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004576 sand Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/10—Investigating individual particles
Abstract
The invention discloses a precise monitoring method for the sediment content of a water section of a rainwater pipe network under different liquid level flow states, which combines a sediment content measuring device fixed on the side wall of an inspection well and a sediment content on-line monitoring controller arranged on the sediment content measuring device, and establishes mathematical models under different water levels by distributing turbidity sensor positions and self-influencing ranges under different water levels and giving different weight coefficients to the turbidity sensor positions and combining indoor test verification, so that the problems of undefined water-sediment relationship, low sediment content monitoring precision, difficulty in standardized popularization, insufficient data application and the like of the existing pipeline can be effectively solved. Meanwhile, scientific and reasonable data support is provided for urban drainage pipe network planning design and quantitative evaluation of water and soil loss.
Description
Technical Field
The invention belongs to the technical field of urban drainage pipe network monitoring and water conservancy informatization, and relates to a method for accurately monitoring sediment content of a water section of a rainwater pipe network under different liquid level flow states.
Background
During urban construction, due to unreasonable land configuration and vegetation destruction such as land development, road repair, building, bridge construction and the like, water and soil loss phenomenon is caused, so that urban drainage pipe network congestion and damage conditions are caused, the 'Huang Nishui' surface cross flow and river pollution are caused, the urban ecological safety level is seriously reduced, the water and sand relationship in the urban pipe network is always an important data basis for pipe network construction, accurate and implemented basic data are further provided, and quantitative discrimination standards are provided for urban pipe network safety, water and soil loss flow direction and flow size.
At present, the research on water-sand relationship is mainly carried out on river suspended sediment monitoring, and the suspended sediment monitoring method at home and abroad mainly comprises an isotope radiation method, an acoustic method, a vibration method and an optical method, wherein the methods have certain differences in technical maturity, use safety, construction cost and application field; the optical method and the acoustic method are also applied to monitoring of sediment concentration of pipelines, grit chambers and the like, but have own limitations and applicability in different sediment concentrations, particle sizes, colors and different water conditions, and the optical method and the acoustic method can be used for calculating the sediment concentration of the pipelines after comparing and analyzing the measured data of the optical method, the acoustic method and the manual measured data according to different water areas, so that the application range and the popularization range are seriously insufficient. Meanwhile, under different flow conditions of the pipeline, the sediment content calculation models of the sections of different water levels have no unified standard and standard, so that the monitoring effect of the sediment content of the pipeline is not ideal, and the application rate of the device is not high.
Disclosure of Invention
The invention aims to provide a method for accurately monitoring the sediment content of a cross section of water in different liquid level flow states of a rainwater pipe network, and establish a method for monitoring the sediment of the cross section under different water level conditions, further provide an accurate monitoring method for monitoring the sediment in pipe networks in full pipe flow states and non-full pipe flow states, and also provide data support for the pipeline in the flow states not to be blocked by sediment.
The technical scheme adopted by the invention is that the method for accurately monitoring the sediment content of the cross section of the water under different liquid level flow states of the rainwater pipe network adopts a monitoring device to monitor, and the specific method is as follows:
step 1; install monitoring devices at pipeline boundary wall or drainage section, make it can stably lay in fixed monitoring position, switch on, the device can begin to monitor:
step 2: sensing the liquid level height of the instantaneous section of the pipeline through an ultrasonic liquid level meter, and driving the whole monitoring device by a stepping motor to move to a preset position of a measuring point;
step 3: the section water level and turbidity sensor are collected through ultrasonic wave to obtain the change of the sediment particle number data value, and the established mathematical model is called to obtain the sediment content of the section per unit volume under the state of full pipe flow and non-full pipe flow.
The present invention is also characterized in that,
the monitoring device includes: the sediment content measuring device is fixed on the side wall of the inspection well, and the sediment content on-line monitoring controller is arranged on the sediment content measuring device;
the sediment content measuring device comprises a fixed support fixed on the side wall of the pipeline inspection well, a linear sliding table module is connected to the fixed support, the linear sliding table module is connected with a 2040 European standard aluminum profile which is longitudinally arranged through a sliding block, a direct-current speed reducing motor is fixed on the lower end of the 2040 European standard aluminum profile outwards through a 2020 European standard aluminum profile and an angle bracket, the direct-current speed reducing motor is connected with an arc tee through a connecting rod connected with a rigid coupling, and the tail end of the arc tee is connected with a turbidity sensor through an optical axis;
a wire rail is arranged along the length direction of the 2040 European standard aluminum profile, and faces one side of the fixed support; the fixed support is fixed on the sliding block B, the lower end of the fixed support is connected with an ultrasonic liquid level meter through an ultrasonic liquid level meter fixing piece, the upper end of the sliding block B is connected with a screw rod controlled by a stepping motor, and the stepping motor is connected with the screw rod through an elastic coupling;
the on-line monitoring controller is fixed on the upper end of the 2040 European standard aluminum profile and is electrically connected with the turbidity sensor, the ultrasonic liquid level meter, the stepping motor and the direct current speed reducing motor.
The fixing support is of an L-shaped structure, and the cross rod of the support is horizontally installed and fixed on the side wall of the inspection well through the expansion screw and the fixing piece; the linear sliding table module is connected with the bracket cross rod through a vertical connecting corner fitting; the ultrasonic water level gauge is fixed on the support cross rod through two M3 screws.
(1) The mathematical model of the sediment content of the section per unit volume under the state of full pipe flow is as follows:
wherein S is x Is the area of the lower section corresponding to the water depth H;
N x is the particle number of the sediment unit solution on the flow section of the pipeline;
N 0 、N 1 、N 2 the particle number of the unit solution is measured within the effective range of the three turbidity sensors;
S 0 、S 1 、S 2 respectively refers to effective measurement ranges corresponding to the three turbidity sensors;
(2) the calculation mode of the sediment content of the unit volume section under the state of non-full pipe flow is as follows:
(1) Case 1:N 0 no data, N 1 N 2 All have data:
(2) Case 2:N 0 data is unstable, N 1 N 2 All have stability data:
(3) Case 3:N 0 data is unstable, N 1 N 2 All have stability data:
(4) Case 4:N 0 、N 1 n 2 All have stability data:
wherein D is the diameter of the pipeline;
W g 、W g1 、W g2 、W g3 、W g4 the sediment content value is in a state corresponding to the flow section;
N 0 、N 1 、N 2 the particle number of the unit solution is measured within the effective range of three turbidity sensors, S 0 、S 1 、S 2 An effective measurement range corresponding to the sensor;
N x is the particle number of sediment unit solution on the flow section of a pipeline, S x Is the cross-sectional area under the corresponding water depth H.
The beneficial effects of the invention are as follows:
the accurate monitoring method for the sediment content of the water flow section of the rainwater pipe network in different liquid level flow states combines the drainage characteristics of the urban drainage pipe, adopts three pairs of turbidity acquisition modules to form a concentric circle, ensures that the acquisition ranges of the turbidity sensors are overlapped with each other, provides accurate basic data for establishing a mathematical model, innovately establishes sediment content calculation methods in different pipe full pipe flow states and non-full pipe flow states and under different water level characteristics, has simple development structure and convenient operation, realizes accurate monitoring of the sediment content of the pipe, provides effective technical support for urban water ecological security, and also provides data basis for planning and designing the urban pipe network.
The monitoring device comprises a sediment content measuring device fixed on the side wall of the inspection well and a sediment content on-line monitoring controller arranged on the sediment content measuring device; through the arrangement of turbidity sensor positions and the influence range thereof under different water levels, the indoor test verification is combined, different weight coefficients are given to the turbidity sensor positions, mathematical models under different water levels are built, and model parameters are unique.
Drawings
Fig. 1 (a) is a schematic diagram of the overall structure of the monitoring device of the present invention.
Fig. 1 (b) is a side view of the monitoring device of the present invention.
Fig. 1 (c) is a top view of the monitoring device of the present invention.
Fig. 1 (d) is a view showing the use state of the monitoring device of the present invention.
FIG. 2 is a model A for calculating the sediment content of the water section under the non-full pipe flow state.
FIG. 3 is a model B for calculating the sediment content of the water section under the non-full pipe flow state.
FIG. 4 is a model C for calculating the sediment content of the water section under the non-full pipe flow state.
FIG. 5 is a model D for calculating the sediment content of the water section under the non-full pipe flow state.
In the figure: 1. a stepping motor; 2. a front fixing plate; 3. 2040 European standard aluminum profile; 4. an angle code; 5. a direct current speed reduction motor; 6. 2020 European standard aluminum profile; 7. a rigid coupling; 8. arc tee joint; 9. an optical axis; 10. a turbidity sensor; 11. an on-line monitoring controller; 12. a rear fixing plate; 13. an ultrasonic liquid level meter; 14. an ultrasonic level gauge fixture; 15 a sliding block B; 16. a wire rail; 17. a screw rod; 18. a support base; 19. an elastic coupling.
Detailed Description
The specific embodiments of the invention are described in further detail below with reference to the accompanying drawings, so that those skilled in the art can make accurate monitoring devices for the sediment content of the water section of the rainwater pipe network in different liquid level flow states according to the specific embodiments, and can monitor the sediment content of the water section of the pipe network in different liquid level flow states by using the device of the invention. The concrete implementation is as follows:
the invention relates to a precise monitoring method for the sediment content of a water cross section of a rainwater pipe network under different liquid level flow states, wherein the adopted monitoring device is shown in fig. 1 (a) -1 (d), and comprises a sediment content measuring device fixed on the side wall of an inspection well and a sediment content on-line monitoring controller 11 arranged on the sediment content measuring device;
the sediment content measuring device comprises a fixed support fixed on the side wall of the pipeline inspection well, a linear sliding table module is connected to the fixed support, the linear sliding table module is connected with a 2040 European standard aluminum profile 3 which is longitudinally arranged through a sliding block, a direct current speed reducing motor 5 is fixed on the lower end outwards side of the 2040 European standard aluminum profile 3 through a 2020 European standard aluminum profile 6 and an angle bracket 4, the direct current speed reducing motor 5 is connected with an arc-shaped tee joint 8 through a connecting rod connected with a rigid coupler 7, and the tail end of the arc-shaped tee joint 8 is connected with a turbidity sensor 10 through an optical axis 9;
a wire rail 16 is arranged along the length direction of the 2040 European standard aluminum profile 3, and the wire rail 16 faces one side of the fixed support; the linear rail 16 is provided with a sliding block B15, the fixed support is fixed on the sliding block B15, the upper end of the sliding block B15 is connected to a screw rod 17 controlled by the stepping motor 1, and the stepping motor 1 is connected with the screw rod 17 through an elastic coupling 19; the lower end of the fixed bracket is connected with an ultrasonic liquid level meter 13 through an ultrasonic liquid level meter fixing piece 14;
the on-line monitoring controller 11 is fixed at the upper end of the 2040 European standard aluminum profile 3, and the on-line monitoring controller 11 is electrically connected with the turbidity sensor 10, the ultrasonic liquid level meter 13, the stepping motor 1 and the direct current gear motor 5.
The fixing support is of an L-shaped structure, and the cross rod of the support is horizontally installed and fixed on the side wall of the inspection well through the expansion screw and the fixing piece; the linear sliding table module is connected with the bracket cross rod through a vertical connecting corner fitting; the ultrasonic water level gauge 13 is fixed on the bracket cross bar through two M3 screws.
The top of the 2040 European standard aluminum profile 3 is connected with a front fixing plate 2, and the stepping motor 1 is fixedly connected to the front fixing plate 2; the bottom of the 2040 European standard aluminum profile 3 is connected with a rear fixing plate 12, and the rear fixing plate 12 is positioned below the sliding block B15.
The invention relates to a method for accurately monitoring sediment content of a water section of a rainwater pipe network in a full pipe and non-full pipe flow state, which is shown in a figure 1 (d), and specifically comprises the following steps:
step 1; install monitoring devices at pipeline boundary wall or drainage section through fixed bolster and two 2020 Europe mark aluminium alloy, make it can stably lay in fixed monitoring position, switch on, the device can begin to monitor:
step 2: sensing the liquid level height of the instantaneous section of the pipeline through an ultrasonic liquid level meter, and driving the whole monitoring part to move a measuring point preset position by a stepping motor 1;
step 3: acquiring the change of the data value of the sediment particle number by using an ultrasonic wave acquisition section water level and a turbidity sensor, and calling an established mathematical model by using an on-line monitoring controller to acquire the sediment content of the section per unit volume under the state of full pipe flow and non-full pipe flow; the method realizes accurate monitoring of the sediment content of the section, large-screen real-time display of the controller and the like.
By combining the structural characteristics of the site and the device, the determination of the sediment content of the section is realized by utilizing three pairs of sensors, the relative positions of the sensors are fixed, and the sensors are influenced by the acquisition range and the depth of contact water from the water surface under different water levels; meanwhile, sand grains in a water body are in a semiparabolic sinking state in the movement process, and the three sensors can better realize accurate collection of the number of particles in a layer, so that basic formulas of the measurement process are consistent, the collection range and the number of each sensor are different, accurate monitoring can be realized through different weights, meanwhile, the integrity and the operability of a mathematical model are ensured.
(1) The calculation mode of the sediment content of the section per unit volume in the state of full pipe flow is as follows:
wherein D is the pipe diameter;
N 0 、N 1 、N 2 the particle number of the unit solution is measured within the effective range of the three turbidity sensors;
S 0 、S 1 、S 2 an effective measurement range corresponding to the sensor;
N x is the particle number of sediment unit solution on the flow section of a pipeline, S x Is the cross-sectional area under the corresponding water depth H.
(2) The calculation mode of the sediment content of the unit volume section under the state of non-full pipe flow is as follows:
1) Case 1: as shown in figure 2, two sensors submerged in a section are on the same horizontal plane, the accuracy of the sensors is kept consistent, the signal values acquired by the two sensors are identical, the sensor positioned at the uppermost is not submerged in water, the flow state of water in a pipeline is determined by the water body and the pipeline arrangement condition, the monitoring range of the two sensors exceeds 1/2 of the area of the overflow section, the average value of the monitoring range is calculated by using equal-proportion accumulation, the accuracy of the monitoring itself can be improved, and the average value is more reasonable under the environment of a stable influence area of the sensors.
N 0 No data, N 1 N 2 All have data:
2) Case 2: as shown in the figure 3 of the drawings,N 0 data is unstable, N 1 N 2 All have stable data:
the three sensors are all flooded on the flow section, but the uppermost sensor just contacts the water surface, the water surface can be exposed in the process of up-and-down fluctuation, the stable value can not be obtained, but under the condition of stable water surface, the sediment particle number of the influence area can be measured, according to the size of the influence area of the sensor in fig. 3, the other two pairs of sensors are required to be supplemented with the data of the uppermost sensor in the stability, the particle number in the upper part of water body can not be accurately obtained, meanwhile, the uppermost sensor has about 1/2 area for monitoring, so the weighting coefficient is given to be 2, the other two pairs of sensors are kept unchanged, and the following mathematical model is established:
3) Case 3: as shown in figure 4 of the drawings,N 0 data is unstable, N 1 N 2 All have stable data:
the three sensors are all flooded on the flow section, the uppermost sensor is located at a certain distance below the water surface, stable values can be obtained in the water surface fluctuation process, according to the size of the sensor influence area in fig. 4, the sensor 1 has about 2/3 area and can be monitored, so that the weighting coefficient is 3/2, the other two pairs of sensors are kept unchanged, and the following mathematical model is established:
4) Case 4: as shown in figure 5 of the drawings,N 0 、N 1 n 2 All have stable data acquisition;
the three sensors are all flooded on the flow section, the monitoring range of the sensor positioned at the uppermost part reaches 4/5, the sediment particle number in the affected area can be accurately collected and represented, but because of the non-full pipe flow state, bubbles are generated at the top end of the pipe to influence the particle number in the collected area, the weight coefficient is 5/4 for keeping the consistency of the model, the other two pairs of sensors are kept unchanged, and the following mathematical model is established:
wherein D is the pipe diameter;
W g 、W g1 、W g2 、W g3 、W g4 the sediment content value is in a state corresponding to the flow section;
N 0 、N 1 、N 2 the particle number of the unit solution is measured within the effective range of the three turbidity sensors;
S 0 、S 1 、S 2 an effective measurement range corresponding to the sensor;
N x is the particle number of sediment unit solution on the flow section of a pipeline, S x Is the cross-sectional area under the corresponding water depth H.
The following is a comparison of the verification results obtained by the monitoring model and the calibration method:
from the above table, it can be seen that the measurement error of the method of the present invention is smaller than that of the conventional calibration method, so that it can be explained that the model set by the present invention is in accordance with the actual situation.
Having described the basic principles, main features and advantages of the present invention, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are described only by the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims and their equivalents.
Claims (3)
1. The accurate monitoring method for the sediment content of the water flow section of the rainwater pipe network under different liquid level flow states is characterized by adopting a monitoring device for monitoring, and comprises the following steps:
step 1: the monitoring device is arranged on the side wall or the drainage section of the pipeline, so that the monitoring device can be stably arranged at a fixed monitoring position, and the monitoring device can start monitoring after being powered on;
the monitoring device includes: a sediment content measuring device fixed on the side wall of the inspection well and a sediment content on-line monitoring controller (11) arranged on the sediment content measuring device;
the sediment content measuring device comprises a fixed support fixed on the side wall of a pipeline inspection well, a linear sliding table module is connected to the fixed support, a 2040 European standard aluminum profile (3) which is longitudinally arranged is connected to the linear sliding table module through a sliding block, a direct-current gear motor (5) is fixed to the lower end of the 2040 European standard aluminum profile (3) outwards through a 2020 European standard aluminum profile (6) and an angle code (4), the direct-current gear motor (5) is connected with an arc-shaped tee joint (8) through a connecting rod connected with a rigid coupler (7), and a turbidity sensor (10) is connected to the tail end of the arc-shaped tee joint (8) through an optical axis (9);
a wire rail (16) is arranged along the length direction of the 2040 European standard aluminum profile (3), and the wire rail (16) faces one side of the fixed support; the fixed support is fixed on a sliding block B (15), the upper end of the sliding block B (15) is connected to a screw rod (17) controlled by a stepping motor (1), and the stepping motor (1) is connected with the screw rod (17) through an elastic coupling (19); the lower end of the fixed bracket is connected with an ultrasonic liquid level meter (13) through an ultrasonic liquid level meter fixing piece (14);
the online monitoring controller (11) is fixed at the upper end of the 2040 European standard aluminum profile (3), and the online monitoring controller (11) is electrically connected with the turbidity sensor (10), the ultrasonic liquid level meter (13), the stepping motor (1) and the direct current speed reducing motor (5);
step 2: sensing the liquid level height of the instantaneous section of the pipeline through an ultrasonic liquid level meter, and driving the whole monitoring part to move to a preset position of a measuring point by a stepping motor;
step 3: acquiring the section water level and the sediment particle number by using an ultrasonic liquid level meter and a turbidity sensor, and calling an established mathematical model to acquire the sediment content of the section per unit volume under the state of full pipe flow and non-full pipe flow;
the mathematical model of the sediment content of the unit volume section under the state of full pipe flow is as follows:
wherein S is x Is the area of the lower section corresponding to the water depth H; w (W) g Is the sediment content of a unit volume section under the state of full pipe flow;
N x is the particle number of the sediment unit solution on the flow section of the pipeline;
N 0 、N 1 、N 2 the particle number of the unit solution is measured within the effective range of the three turbidity sensors;
S 0 、S 1 、S 2 respectively, refer to the effective measurement ranges corresponding to the three turbidity sensors.
2. The accurate monitoring method for the sediment content of the cross section of the water under different liquid level flow states of the rainwater pipe network according to claim 1, wherein the fixed support is of an L-shaped structure, and the cross rod of the support is horizontally installed and fixed on the side wall of the inspection well through the expansion screw and the fixing piece; the linear sliding table module is connected with the bracket cross rod through a vertical connecting corner fitting; the ultrasonic liquid level meter (13) is fixed on the support cross rod through two M3 screws.
3. The method for accurately monitoring the sediment content of the cross section of the water passing through the rainwater pipe network under different liquid level flow states according to claim 1, wherein the calculation mode of the sediment content of the cross section of the unit volume under the state of non-full pipe flow is as follows:
(1) Case(s)1：N 0 No data, N 1 N 2 All have data:
(2) Case 2:N 0 data is unstable, N 1 N 2 All have stability data:
(3) Case 3:N 0 data is unstable, N 1 N 2 All have stability data:
(4) Case 4:N 0 、N 1 n 2 All have stability data:
wherein D is the diameter of the pipeline;
W g1 、W g2 、W g3 、W g4 the sediment content value is in a state corresponding to the flow section;
N 0 、N 1 、N 2 the particle number of the unit solution is measured within the effective range of three turbidity sensors, S 0 、S 1 、S 2 An effective measurement range corresponding to the sensor;
N x is the particle number of sediment unit solution on the flow section of a pipeline, S x Is the cross-sectional area under the corresponding water depth H.
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