Layout method of large-flow algae control well based on gate pump hub area

Abstract

The application is based on a large-flow algae control well arrangement method in the gate-pump hub area, belongs to the technical field of river network cyanobacteria prevention and control, and particularly relates to the same. The application comprises the following steps: defining the position of the gate-pump hub and the diversion channel as the gate-pump hub area, setting at least two groups of pump station units at the water delivery end of the diversion channel to create a water flow model, using the water flow streamline and flow velocity distribution in the diversion channel based on the water flow model to determine whether to perform a flow regulation measure, so that the flow velocity and flow velocity distribution of the water flow in the diversion channel with the added algae control well are improved; obtaining the water conservancy characteristic value of the pump station unit, and determining whether the currently arranged algae control well and the performed flow regulation measure simultaneously meet the algae control demand and the subsequent pump station unit operation demand based on the water conservancy characteristic value. The application realizes large-flow algae control by arranging multiple algae control wells in the diversion channel of the gate-pump hub area, and completes a large amount of algae control demand without affecting the basic function of the pump station unit.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of river network cyanobacteria prevention and control, and particularly relates to a large-flow algae control well arrangement method based on a gate pump hub area. BACKGROUND

[0002] Due to the phenomenon of cyanobacteria backflow and large-area accumulation of cyanobacteria, the water quality of the river and the regional water environment image are seriously affected. In order to prevent the influence of cyanobacteria on the water quality of the river and the water ecological environment and improve the regional water environment image, the algae control well is not applied to improve the water quality in the diversion river at present, and artificial treatment is generally used.

[0003] When the algae control demand increases, a large number of algae control wells are considered to be arranged at the gate pump hub to complete the large-flow algae control demand. However, it is found through practice that the algae control well project is adjacent to the pump station hub of the outer pond, the arrangement position of the algae control well is in the pump station diversion river, and the water flow state of the algae control well directly affects the operation state of the pump station unit, such as water flow stability and water discharge. SUMMARY

[0004] The application provides a large-flow algae control well arrangement method based on a gate pump hub area to solve the technical problems in the background art.

[0005] The application adopts the following technical scheme: a large-flow algae control well arrangement method based on a gate pump hub area, at least comprising the following steps:

[0006] The position of the gate pump hub and the diversion river is defined as the gate pump hub area, at least two groups of pump station units are arranged in parallel at the water outlet end of the diversion river, the pump station units are communicated with the water inlet pool, a retaining wall is arranged in the diversion river, and a plurality of algae control wells are arranged at the retaining wall according to a predetermined gap;

[0007] A water flow model is created, the water flow streamline and the flow velocity distribution in the diversion river are obtained by using the water flow model, whether the flow regulation measure needs to be performed is judged based on the water flow streamline and the flow velocity distribution, and the flow velocity and the flow velocity distribution of the water flow in the diversion river with the added algae control well are improved;

[0008] The water conservancy characteristic value at the water flow section of the pump station unit is obtained, and whether the currently arranged algae control well and the performed flow regulation measure simultaneously meet the algae control demand and the subsequent pump station unit operation demand is judged based on the water conservancy characteristic value.

[0009] In a further embodiment, the following steps are further included:

[0010] The diversion river, the algae control well and the pump station unit of the water flow model are meshed and mesh independence verification is performed to obtain the optimal mesh number.

[0011] In further embodiments, the rectification measures include one or more of adjusting the form of the retaining wall, setting several bottom sills of a predetermined depth, adding a guide wall, or adding a beach cut.

[0012] In further embodiments, the water flow model is created as follows:

[0013] The water flow streamline equation is as follows:

[0014]

[0015] where i and j are the coordinate axis numbers; u i and u j are velocity vectors in the i and j coordinate axis directions, respectively; t is time; p is the density of the water flow fluid; x i and x j are the i and j coordinate axes; m is the dynamic viscosity of the water flow fluid; S i is the momentum source term; and p is the water flow fluid pressure.

[0016] The flow velocity distribution equation is as follows:

[0017]

[0018]

[0019] where k is the turbulent kinetic energy, s is the turbulent kinetic energy dissipation rate, C1 and C2 are model constants, s k and s ε are the turbulent Prandtl numbers of k and s, respectively, Q k represents the generation of turbulent kinetic energy caused by the average velocity gradient, and P k represents the turbulent kinetic energy generated by buoyancy.

[0020] The water flow streamline diagram and the flow velocity distribution diagram in the river channel are simulated based on the water flow streamline equation and the flow velocity distribution equation, and the average flow velocity and the flow velocity distribution of the water flow in the river channel are analyzed based on the water flow streamline diagram and the flow velocity distribution diagram.

[0021] A constraint range [v min , v max ] about the average flow velocity and a constraint condition about the flow velocity distribution, i.e., the uniformity of the distribution, are established, where v min is the minimum value of the average flow velocity allowed by a predetermined average flow velocity, and v mdx is the maximum value of the average flow velocity allowed by a predetermined average flow velocity.

[0022] If the analyzed average flow velocity does not belong to the constraint range or / and the flow velocity distribution does not meet the constraint condition, rectification measures need to be taken.

[0023] In further embodiments, the water conservancy characteristic value at least comprises: a flow velocity distribution uniformity and a velocity weighted average angle at a characteristic section of a pump station unit;

[0024] The flow velocity distribution uniformity is obtained by the following formula:

[0025]

[0026] The velocity weighted average angle is obtained by the following formula:

[0027] In the formula, h is the number of the pump station unit, u αh is the axial water flow velocity of the pump station unit numbered h, u th is the transverse water flow velocity of the pump station unit numbered h, represents the average axial water flow velocity of the h pump station units;

[0028] A flow velocity distribution uniformity threshold value and a velocity weighted average angle threshold value are preset. If the calculated or / and flow velocity distribution uniformity and / or velocity weighted average angle is less than the threshold value, a flow regulation measure needs to be taken.

[0029] In further embodiments, the characteristic section is obtained by the following method:

[0030] The water inlet channel inlet of each pump station unit is selected, and a vertical section obtained by cutting the water inlet channel inlet along a vertical plane is the characteristic section.

[0031] In further embodiments, the optimal grid number is obtained by the following process:

[0032] The inlet channel, algae elimination well and pump station unit are divided into blocks and subjected to grid subdivision, the complex structure region is subjected to local encryption processing, the quality of the local grid is improved by adjusting the control points on the grid and adding the topological layer to control the dimensionless value within 100;

[0033] The total water loss is used as a basis for measuring the influence of the grid number on the numerical calculation result, and the total water loss is calculated by the following formula:

[0034] In the formula, H f is the total water loss of the whole channel; P in and P out are the total pressure at the inlet and outlet of the water inlet pool respectively; and g is the gravitational acceleration.

[0035] Through grid independence analysis, when the total number of grids is 12 million, the change of the water loss is small, and the grid quality is above 0.3, which meets the requirements of numerical calculation.

[0036] In a further embodiment, the sill includes one or more of the following: the forebay sill and the diversion channel sill.

[0037] In a further embodiment, the retaining wall specifically comprises a first wall surface and a second wall surface, the first wall surface and the second wall surface being perpendicular to each other; the algae control wells are arranged along the first wall surface and the second wall surface at predetermined intervals.

[0038] In a further embodiment, the retaining wall has an arc-shaped wall surface and a second wall surface, the arc-shaped wall surface being arranged opposite to the gate pump hub;

[0039] The algae-controlling wells are arranged at predetermined intervals along the arc-shaped wall.

[0040] The beneficial effects of the present invention are as follows: The present invention firstly achieves high-throughput algae control by arranging multiple algae control wells in the diversion channel of the gate pump hub area, so as to meet the algae control needs and algae control efficiency when necessary.

[0041] Simultaneously, by providing a water flow model, hydraulic characteristic values ​​of the pumping station units, and corresponding rectification measures, the rational layout of multiple algae control wells within the diversion channel is achieved, thus solving the problem of reduced flow rate, water level, and flow pattern of the pumping station units caused by the addition of algae control wells. This enables the fulfillment of a large algae control requirement without affecting the basic functions of the pumping station units. Attached Figure Description

[0042] Figure 1 This is a graph showing the number of grid cells in Example 1.

[0043] Figure 2 This is a diagram of the layout of the algae control well in Example 2.

[0044] Figure 3 This is a streamline diagram of the water flow in Example 2.

[0045] Figure 4 This is a flow velocity distribution diagram for Example 2.

[0046] Figure 5 This is a diagram of the layout of the algae control well in Example 3.

[0047] Figure 6 This is a streamline diagram of the water flow in Example 3.

[0048] Figure 7 This is a flow velocity distribution diagram for Example 3.

[0049] Figure 8 This is a diagram of the layout of the algae control well in Example 4.

[0050] Figure 9 This is a streamline diagram of the water flow in Example 4.

[0051] Figure 10 Flow velocity distribution diagram for Example 1.

[0052] Figure 11 Arrangement diagram of algae control wells in Example 1.

[0053] Figure 12 Streamline diagram of water flow for Example 1.

[0054] Figure 13 Flow velocity distribution diagram for Example 1.

[0055] Figures 1 to 13 Each label in the figure is: algae control well 1, retaining wall 2, pump station unit 3, flow guide wall 4, front pool sill 5, and river channel sill 6. DETAILED DESCRIPTION

[0056] The applicant found through practical research that, due to the need for algae control, a large number of algae control wells were set up at the adjacent position of the outer pond river pump station hub, i.e. the position of the algae control well arrangement in the pump station river channel can solve the problem of algae control, but it brings new problems: the water control capacity, water level and flow pattern of the original pump station hub are all reduced, and it cannot meet the water quantity demand and the normal navigation water level demand in the region.

[0057] Example 1

[0058] To solve the above technical problems, the large-flux algae control well arrangement method based on the gate pump hub area is provided, which at least includes the following steps:

[0059] Step one, define the position of the gate pump hub and the river channel as the gate pump hub area, set at least two groups of pump station units in parallel at the water outlet end of the river channel, and the pump station units are communicated with the water inlet pool; a retaining wall is arranged in the river channel, and a plurality of algae control wells are arranged at the retaining wall according to a predetermined gap; in this embodiment, the pump station unit is provided with three groups. In this embodiment, the retaining wall has two forms, one of which has two walls with right angles. The other form has two walls with arc shape, and the arc-shaped wall is arranged opposite to the gate pump hub.

[0060] Step two, create a water flow model, use the water flow streamline and flow velocity distribution in the river channel, and judge whether the flow regulation measures need to be performed based on the water flow streamline and flow velocity distribution, so that the flow velocity and flow velocity distribution of the water flow in the river channel with added algae control wells are improved; the selection of the retaining wall form also belongs to one of the flow regulation measures in this embodiment. In addition, the flow regulation measures also include one or several of the following: setting a plurality of sills with a predetermined depth, adding a flow guide wall, or adding a beach cutting.

[0061] Step three, obtaining the water conservancy characteristic value of the pump station unit, judging whether the current arranged algae control well and the executed rectification measure satisfy the algae control demand and the subsequent pump station unit operation demand at the same time based on the water conservancy characteristic value. In other words, when it is found after analysis that the water flow quality of the intake channel is reduced after the algae control well is added, one or more rectification measures (adjusting the form of the retaining wall, setting a plurality of bottom sills with a predetermined depth, adding a guide wall, or adding a beach) are selected to make the water flow in the intake channel after rectification return to the state before the algae control well is added, while satisfying the double demands of algae control and flow guide.

[0062] Based on steps one to three, it can be seen that the embodiment analyzes the water flow streamline and flow velocity distribution in the intake channel, calculates the water conservancy characteristic value of the pump station unit, and judges whether the algae control well arranged in the existing intake channel will affect the normal work of the intake channel, and if there is an impact, the corresponding rectification measure is selected based on the above analysis.

[0063] In further embodiments, the creation process of the water flow model is as follows:

[0064] The formula of the water flow streamline equation is as follows:

[0065]

[0066] In the formula, i and j are the coordinate axis numbers; u i and u j are the velocity vectors in the i-th and j-th coordinate axis directions, respectively; t is the time; p is the density of the water flow fluid; x i and x j are the i-th and j-th coordinate axes; m is the dynamic viscosity of the water flow fluid; S i is the momentum source term; and p is the water flow fluid pressure.

[0067] The formula of the flow velocity distribution equation is as follows:

[0068]

[0069]

[0070] In the formula, k is the turbulent kinetic energy, s is the turbulent kinetic energy dissipation rate, C1 and C2 are model constants, s k and s ε are the turbulent Prandtl numbers of k and s, respectively, Q k represents the generation of turbulent kinetic energy caused by the average velocity gradient, and P k represents the turbulent kinetic energy generated by buoyancy.

[0071] simulate the water flow streamline graph and the flow velocity distribution graph in the river channel based on the water flow streamline equation and the flow velocity distribution equation, and analyze the average flow velocity and the flow velocity distribution of the water flow in the river channel based on the water flow streamline graph and the flow velocity distribution graph;

[0072] establish a constraint range about the average flow velocity: [v min ,v max ] and a constraint condition about the flow velocity distribution: the uniformity of the distribution; wherein, v min is a minimum value allowed for the average flow velocity, and v max is a maximum value allowed for the average flow velocity.

[0073] It should be noted that the minimum value is set to ensure the normal requirements of the water flow in the river channel, and the maximum value and the uniformity are set to ensure that the algae control well has enough time and processing capacity for algae control, and also to ensure the normal operation of the pump station unit and not to affect the normal navigation. Avoiding too large water flow or uniform water flow distribution is not conducive to the precipitation of blue-green algae and the subsequent operation of the pump station.

[0074] If the analyzed average flow velocity does not belong to the constraint range or / and the flow velocity distribution does not meet the constraint condition, flow regulation measures need to be taken. Further flow regulation measures include one or several of adjusting the form of the retaining wall, setting several bottom sills with a predetermined depth, adding a guide wall, or adding a beach cutting.

[0075] The water conservancy characteristic values in the step three at least include: the flow velocity distribution uniformity and the speed weighted average angle at the characteristic section of the pump station unit;

[0076] The flow velocity distribution uniformity is obtained by the following formula:

[0077]

[0078] The speed weighted average angle is obtained by the following formula:

[0079] In the formula, h is the number of the pump station unit, u αh is the axial water flow velocity of the pump station unit numbered h, u th is the transverse water flow velocity of the pump station unit numbered h, represents the average axial water flow velocity of the h pump station units;

[0080] The flow velocity distribution uniformity threshold value and the speed weighted average angle threshold value are pre-set. If the calculated or / and flow regulation measures need to be taken.

[0081] That is, in the judgment, each water conservancy characteristic value of each pump station unit needs to meet the demand, so that the current arrangement of the algae control well can realize large flux algae control while ensuring the basic function and basic performance of each pump station unit, such as the stability and flux of the outlet water flow.

[0082] Considering that the water flow model is about different regions of the approach channel, the algae control well, and the pump station unit, and the complexity of the structure of each region is different, in order to increase the simulation accuracy and reduce the error, the embodiment further includes: performing grid division on the approach channel, the algae control well, and the pump station unit of the water flow model, and performing grid independence verification to obtain the optimal grid number.

[0083] Specifically, the approach channel, the algae control well, and the pump station unit are divided into block grids, the complex structure region is locally encrypted, the quality of the local grid is improved by adjusting the control points on the grid and adding the topological layer, and the dimensionless value is controlled within 100;

[0084] The total hydraulic loss is used as a basis for measuring the influence of the number of grids on the numerical calculation result, and the total hydraulic loss is calculated by the following formula:

[0085] Wherein, H f is the total hydraulic loss of the whole flow channel; P in and P out are the total pressure of the inlet and outlet of the inlet pool respectively; g is the acceleration of gravity;

[0086] Through grid independence analysis, as shown in Figure 1 , when the total number of grids is 12 million, the change of hydraulic loss is small, and the grid quality reaches more than 0.3, meeting the requirements of numerical calculation.

[0087] Embodiment 2

[0088] Based on the large flux algae control well arrangement method based on the gate pump hub area in embodiment 1, a first kind of retaining wall is selected in advance, that is, the retaining wall includes a first wall surface and a second wall surface, the first wall surface is perpendicular to the second wall surface, and the arrangement of the three algae control wells is obtained through water flow model analysis as shown in Figure 2 , that is, the algae control wells are arranged according to the predetermined interval along the first wall surface and the second wall surface. Based on this, the water flow streamline diagram and the flow velocity distribution diagram of the embodiment are obtained by using the water flow model, as shown in Figure 3 and Figure 4 respectively. Without using any flow regulation measures, because of the large angle of lateral water outlet, the outflow state is extremely turbulent, especially in the river channel diffusion section, the water flow structure itself has obvious secondary flow structure, the flow velocity difference between the two sides of the river bed is large, the momentum is uneven, and a large range of vortex is generated, and the maximum vortex flow velocity can reach 1.3 m / s (which is greater than vmax Long-term operation will cause the riverbed to be severely eroded. Therefore, it cannot effectively solve the problem, so certain rectification measures need to be taken.

[0089] Therefore, the rectification measures used in this embodiment at least include one or more of replacing the shape of the retaining wall, setting a predetermined depth of the sill, setting a guide wall, or cutting the beach.

[0090] The sill includes one or more of the front pool sill and the river channel sill. Further, the front pool sill is a predetermined depth of the sill perpendicular to the flow direction near the gate pump hub. Correspondingly, the river channel sill is a predetermined depth of the sill perpendicular to the flow direction in the river channel and near the algae control well.

[0091] Embodiment 3

[0092] Based on the defects described in Embodiment 2, this embodiment not only replaces the shape of the retaining wall 2, but also sets a front pool sill 5. On this basis, the arrangement of the three algae control wells should be as shown in Figure 5 , that is, the algae control wells are arranged at a predetermined interval along the arc-shaped wall surface. Based on this, the flow streamline diagram and the flow velocity distribution diagram of this embodiment are obtained by using the flow model, as shown in Figure 6 and Figure 7 .

[0093] And by observing the flow pattern of the arrangement diagram, it is found that: by using the arc-shaped wing wall, the algae control well 1 is arranged to fully utilize the space of the river channel, reducing the energy of the vortex in the river channel and avoiding the erosion of the river channel and the bank slope. However, due to the relatively wide river channel and the relatively narrow front pool of the pump station, a serious deflection occurs in the narrow section of the river channel, and a large vortex is generated at the branch. Although the rolling and energy dissipation of the front pool sill play a certain rectification role, the flow pattern is improved to a certain extent, but the front pool flow pattern of the pump station unit 3 is still poor, and the stable vortex zone enters the unit, which will cause cavitation and vibration of the unit, which is not conducive to the safe and stable operation of the unit.

[0094] Embodiment 4

[0095] Based on the defects described in Embodiment 3, this embodiment adds a guide wall on the basis of Embodiment 3, and the guide wall is arranged along the flow direction, as shown in Figure 8 .

[0096] Based on this, the flow streamline diagram and the flow velocity distribution diagram of this embodiment are obtained by using the flow model, as shown in Figure 9 and Figure 10The flow pattern of the water flow in the arrangement is observed, and it is found that the vortex problem in the outlet pool is not solved by the guide wall 4, although the average flow velocity of the water flow in the river channel on the outlet side is reduced to some extent, the numerical interval of the flow velocity does not change, and the water flow deviation is improved to some extent. However, the water flow on the back side of the guide wall is recovered poorly, the flow velocity distribution is uneven, a large backflow area is generated near the pump station inlet, the flow velocity on the river channel slope is still large, which has a certain erosion on the slope, and is not conducive to the stability of the retaining wall at the position.

[0097] Example 5

[0098] Based on the defects described in Example 4, the following flow regulating measures are added based on Example 4 in this embodiment: a predetermined depth of the guide channel sill 6 and a beach cutting are arranged as shown in Figure 11 The water flow streamline diagram and the flow velocity distribution diagram of this embodiment are obtained based on the water flow model, as shown in Figure 12 and Figure 13

[0099] The flow pattern of the water flow in the arrangement is observed, and it is found that the vortex problem in the outlet pool is not solved by the guide wall 4, although the average flow velocity of the water flow in the river channel on the outlet side is reduced to some extent, the numerical interval of the flow velocity does not change, and the water flow deviation is improved to some extent. However, the water flow on the back side of the guide wall is recovered poorly, the flow velocity distribution is uneven, a large backflow area is generated near the pump station inlet, the flow velocity on the river channel slope is still large, which has a certain erosion on the slope, and is not conducive to the stability of the retaining wall at the position.

[0100] Based on Examples 2 to 5, it is found that the flow regulating measures of Examples 3 to 5 all have a certain effect in the area of the guide channel, and Example 5 is the best.

[0101] In order to determine whether the flow regulating measures of Examples 2 to 5 have a certain effect on the pump station unit, Example 6 is seen.

[0102] Example 6

[0103] In this embodiment, the water conservancy characteristic values at least include: the flow velocity distribution uniformity and the velocity weighted average angle on the characteristic section of the pump station unit;

[0104] The flow velocity distribution uniformity is obtained by the following formula:

[0105]

[0106] ​The velocity-weighted average angle is obtained by the following formula:

[0107] In the formula, h is the number of the pump station unit, u αh is the axial water flow velocity of the pump station unit numbered h, u th is the transverse water flow velocity of the pump station unit numbered h, represents the average axial water flow velocity of the h pump station units;

[0108] The flow velocity distribution uniformity threshold value and the velocity-weighted average angle threshold value If the calculated or / and measures need to be taken to straighten the flow.

[0109] In other words, each group of pump station units will be analyzed by the flow velocity distribution uniformity and the velocity-weighted average angle, and if any one of the hydraulic characteristics of a group of pump station units does not meet the requirements, it means that the entire scheme is defective.

[0110] Taking Examples 2 to 5 as examples, in order to further compare the hydraulic characteristics of the pump station units under each scheme, the inlet of the water inlet channel of each pump station unit is selected as the characteristic section to analyze the hydraulic characteristics of each pump station unit.

[0111] Table 1 Normal flow velocity uniformity

[0112] Flow rate uniformity / % Example 2 Example 3 Example 4 Example 5 Algae control well No. 1 81.0％ 85.0％ 78.2％ 89.2％ Algae control well No. 2 84.0％ 83.0％ 84.5％ 88.1％ Algae control well No. 3 70.0％ 85.8％ 87.0％ 89.6％

[0113] Based on the above formula, from Table 1, the normal flow velocity uniformity of the characteristic section of the pump station units in the four examples can be compared, and the average values of the normal flow velocity uniformity of the sections of Examples 2, 3 and 4 are 78.3%, 84.6% and 88.9% respectively. The flow velocity uniformity of the inlet section of Example 5 is the highest and is closer to the ideal state, indicating that the flow velocity distribution of the water flow on the characteristic section is more uniform and has better hydraulic characteristics. Therefore, the straightening measures of Example 5 effectively improve the inlet conditions of each unit of the pump station hub, the flow state in the inlet pipe is smooth, the flow velocity of the inlet section is uniform, and the high-efficiency operation of the unit under the design condition can be met.

[0114] Table 2 Velocity-weighted average angle of inlet section

[0115] Velocity weighted average angle / ° Example 2 Example 3 Example 4 Example 5 Algae control well No. 1 73 75.1 73 80 Algae control well No. 2 74 75.1 71 78 Algae control well No. 3 76 75.9 76 79

[0116] From Table 2, the weighted average angle of the water inlet section velocity of the three units of Example 2 is small, deviating from the normal direction, wherein the maximum value is not more than 76°, and the weighted average angle of the unit velocity of the 1# pump station is only 73°, which is likely to generate vortex in the water inlet channel, the water flow velocity is disorderly, the flow direction is complex, the water inlet condition of the device is poor, and the unit efficiency is low. The weighted average angle of the three units in Example 3 and Example 4 increases, and the water flow direction is obviously improved, but the overall scheme is not the most ideal state. The overall weighted average angle of the section water flow of Example 5 is the most optimal state, the average value of the weighted average angle of the velocity is 80°, which is closer to the ideal state of 90° compared with the previous two schemes, the hydraulic characteristics are better, and meet the requirements of the three-dimensional optimal hydraulic design method.

[0117] Example 5 is better in the overall flow field flow state, unit device static pressure distribution and water inlet channel hydraulic characteristics.

Claims

1. A method for arranging high-throughput controlled algae wells based on the gate pump hub area, characterized in that, At least the following steps are included: The location of the gate pump hub and the diversion channel is defined as the gate pump hub area. At least two sets of pump station units are set in parallel at the outlet end of the diversion channel. The pump station units are connected to the intake pool. A retaining wall is set in the diversion channel, and several algae control wells are set at the retaining wall at predetermined intervals. A water flow model is created, and the streamlines and velocity distribution within the channel are used to determine whether rectification measures are needed to improve the flow velocity and velocity distribution within the channel where the control wells are added. The process for creating the water flow model is as follows: The formula for the streamline equation of water flow is as follows: ； In the formula, i and j are the coordinate axis numbers; , i and j are the velocity vectors along the coordinate axes numbered i and j respectively; t is time; The density of the water flow; , These are the coordinate axes numbered i and j; The dynamic viscosity of the water flow; For momentum source term; The pressure of the water flow; The formula for the velocity distribution equation is as follows: In the formula, k is the turbulent kinetic energy. The turbulent kinetic energy dissipation rate, , These are model constants. , k and The turbulent Prandtl number, This represents the generation of turbulent kinetic energy caused by the average velocity gradient. This represents the turbulent kinetic energy generated by buoyancy; Based on the aforementioned streamline equation and velocity distribution equation, the streamline diagram and velocity distribution diagram of the river channel are simulated, and the average velocity and velocity distribution of the river channel are analyzed based on the streamline diagram and velocity distribution diagram. Establish constraints regarding the average flow velocity: Regarding the constraints on velocity distribution: uniformity of distribution; where, The minimum allowable average flow rate, given in advance. The maximum allowable value for a pre-defined average flow rate; If the average flow velocity obtained from the analysis does not fall within the constraint range or / and the flow velocity distribution does not meet the constraint conditions, then rectification measures need to be taken; Obtain the hydraulic characteristic values ​​of the pump station unit, and based on the hydraulic characteristic values, determine whether the currently arranged algae control wells and the implemented rectification measures simultaneously meet the algae control requirements and the subsequent operation requirements of the pump station unit.

2. The method for arranging high-throughput controlled algae wells based on the gate pump hub area according to claim 1, characterized in that, It also includes the following steps: The water flow model is divided into grids for the diversion channel, algae removal well, and pump station units, and the grid independence is verified to obtain the optimal number of grids.

3. The method for arranging high-throughput controlled algae wells based on the gate pump hub area according to any one of claims 1 or 2, characterized in that, The rectification measures include one or more of the following: adjusting the form of the retaining wall, setting several bottom sills at a predetermined depth, adding a guide wall, or adding a cutting channel.

4. The method for arranging high-throughput controlled algae wells based on the gate pump hub area according to claim 1, characterized in that, The hydraulic characteristic values ​​include at least: the uniformity of velocity distribution and the velocity-weighted average angle at the characteristic cross-section of the pumping station unit; The uniformity of the flow velocity distribution is obtained using the following formula: ； The velocity-weighted average angle is obtained using the following formula: In the formula, h is the pump station unit number. Let h be the axial water flow velocity of the pump station unit. Let h be the lateral water flow velocity of the pump station unit. This represents the average axial water flow velocity of m pump station units; Preset flow velocity distribution uniformity threshold and velocity-weighted average angle threshold If the calculated or / and In such cases, rectification measures are required.

5. The method for arranging high-throughput controlled algae wells based on the gate pump hub area according to claim 4, characterized in that, The method for extracting the characteristic cross-section is as follows: The characteristic section is obtained by selecting the inlet of the water inlet channel of each pump station unit and cutting the inlet of the water inlet along the vertical plane.

6. The method for arranging high-throughput controlled algae wells based on the gate pump hub area according to claim 2, characterized in that, The process for obtaining the optimal number of grid cells is as follows: The diversion channel, algae removal well, and pump station units are divided into blocks and meshed. Complex areas are locally densified. The quality of the local mesh is improved by adjusting the control points on the mesh and adding topology layers, and the dimensionless value is controlled within 100. The total hydraulic loss is used as a measure of the impact of the number of grid cells on the numerical calculation results. The total hydraulic loss is calculated using the following formula: ;in, This represents the total hydraulic loss across the entire flow channel. and These are the total pressures at the inlet and outlet of the inlet pool, respectively. It is the acceleration due to gravity; Through grid independence analysis, the hydraulic loss changes are small when the total number of grids is 12 million, and the grid quality reaches above 0.3, which meets the requirements of numerical calculation.

7. The method for arranging high-throughput controlled algae wells based on the gate pump hub area according to claim 3, characterized in that, The bottom sill includes one or more of the following: the bottom sill of the forebay and the bottom sill of the diversion channel.

8. The method for arranging high-throughput controlled algae wells based on the gate pump hub area according to claim 1, characterized in that, The retaining wall specifically consists of a first wall surface and a second wall surface, with the first wall surface and the second wall surface being perpendicular to each other; the algae control wells are arranged along the first wall surface and the second wall surface at predetermined intervals.

9. The method for arranging high-throughput controlled algae wells based on the gate pump hub area according to claim 1, characterized in that, The retaining wall has an arc-shaped wall surface and a second wall surface, and the arc-shaped wall surface is arranged opposite to the gate pump hub; The algae-controlling wells are arranged at predetermined intervals along the arc-shaped wall.

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