A method and system for regulating the flow of river water

Abstract

The present invention discloses a method and a control system for regulating the flow of river water, belonging to the technical field of regulating the flow of river water. The method includes the following steps: determining the confluence, defining the N rivers communicating with the confluence as main stream rivers, and defining the rivers connecting between any two main stream rivers as tributary rivers; constructing M groups of overflow weirs at the confluence, with adjacent overflow weirs used to control the flow state of the corresponding river; when there is a need for regulating the flow of water, regulating the mode of each group of overflow weirs based on the confluence situation of the main stream rivers and tributary rivers to obtain the water flow path required for regulating the flow of water; the water flow path at least includes: the main flow path and the water exchange flow path. In the present invention, based on the water exchange flow path, the rivers are combined into a single-flow long-process river, and the hydrodynamic force of the regional river network is improved when flowing in a single direction, providing better hydraulic conditions for reducing river pollutants.

Description

Technical Field

[0001] The present invention belongs to the technical field of regulation of river water body flow, and particularly relates to a method and a system for regulating river water body flow. Background Art

[0002] There are many rivers in plain areas, and they crisscross each other, with multiple rivers converging at one point. When the water body in the river flows, the aquatic plants in the river will absorb the pollutants in the water body, thereby reducing the pollutant content in the water body.

[0003] However, under natural conditions, the water flow direction in the intersecting rivers is single, which will cause a high degree of water flow between some river water bodies, while a low degree of water flow and a low exchange degree between some river water bodies. Especially in the dry season in winter, the water flow degree and exchange degree between some river water bodies will be further reduced, resulting in a small reduction in the pollutant content in the water body. Summary of the Invention

[0004] Object of the Invention: In order to solve the above problems, the present invention provides a method and a system for regulating river water body flow.

[0005] Technical Solution: A method for regulating river water body flow includes the following steps: determining the confluence, defining the N rivers communicating with the confluence as main stream rivers, and defining the rivers connecting between any two main stream rivers as tributary rivers;

[0006] Constructing M groups of overflow weirs at the confluence, and adjacent overflow weirs are used to control the flow state of the corresponding river; the overflow weir is set to include at least the following modes: open mode, closed mode and overflow mode;

[0007] When there is a need for regulating water body flow, regulating the mode of each group of overflow weirs based on the confluence situation of the main stream rivers and tributary rivers to obtain the water body flow path required for regulating water body flow; the water body flow path at least includes: main flow path and water exchange flow path.

[0008] In a further embodiment, the establishment process of the M groups of overflow weirs is as follows: pouring support columns at the center of the confluence, and arranging M groups of steel sheet piles circumferentially around the support columns; pouring one side of the steel sheet piles on the support columns, and driving the other side of the steel sheet piles into the corresponding river bank; installing lifting gates on each steel sheet pile;

[0009] Setting a water level warning mechanism in the lifting gate, and the water level warning mechanism is set to send a warning message when the water level of the main stream river drops to the water level threshold after regulating the water body flow; regulating the mode of each group of overflow weirs based on the warning message.

[0010] In a further embodiment, the steps for generating the water body flow path are as follows: Define the main river channel where the water body is currently located as φ 1, and the main river channel where the water body finally flows to as φ 2; At least one tributary river channel connecting to the main river channel φ 1 and the main river channel φ 2 is the water body flow regulation river channel ζ i , where i is the number of water body flow regulation river channels;

[0011] Taking φ 1, φ 2 to determine the main flow path, the water body flow regulation river channel ζ i determines the water exchange flow path: In the natural state, each overflow weir is in the open mode, and the water flow is from the main river channel φ 1 flowing naturally to the main river channel φ 2; When there is a need for water body flow regulation, based on the ecological treatment requirements, several tributary river channels with the required flow path length are selected in the water body flow regulation river channel ζ i to form the water exchange flow path, and based on the water exchange flow path, the overflow weir at the intersection of the water exchange flow path and the main flow path is controlled to switch to the overflow mode, and other overflow weirs are switched to the closed mode.

[0012] In a further embodiment, the working process of the water level warning mechanism is as follows: After the water body flow is regulated, when φ 1 water level drops below the water level threshold, the water level warning mechanism issues a warning message, and the warning message at least includes: pressure value; Based on the warning message, all overflow valve modes are adjusted to the open mode.

[0013] In another technical solution, a river channel water body flow regulation system is provided for implementing the above exchange method, and the system includes:

[0014] The first module is configured to determine the intersection, and define the N rivers connected to the intersection as the main river channels, and define the river channels connecting between any two main river channels as tributary river channels;

[0015] M A group of overflow weirs are arranged at the intersection, and adjacent overflow weirs are used to control the flow state of the corresponding river channels; The overflow weir is set to at least include the following modes: open mode, closed mode, and overflow mode;

[0016] The second module is configured to control the mode of each overflow weir based on the confluence of the main river channel and the tributary river channel when there is a need for water flow control, so as to obtain the water flow path required for water flow control; the water flow path includes at least: the main flow path and the water exchange flow path.

[0017] In a further embodiment, it further comprises: a support column disposed at the center of the intersection; M The overflow weirs are arranged along the circumference of the support column; the lifting mechanism is correspondingly connected to the overflow weir through transmission; and the water level warning mechanism is built into the overflow weir.

[0018] In a further embodiment, the overflow weir includes: a steel sheet pile, one side of which is connected to the support column and the other side is connected to the river bank; a hollow portion is provided on the steel sheet pile; a lifting gate is located in the hollow portion and is slidably connected to the steel sheet pile; fluid inlets are provided on both side surfaces of the lifting gate, and the inside of the lifting gate has a cavity connected to the fluid inlet.

[0019] In a further embodiment, the water level warning mechanism is arranged in the cavity, wherein the water level warning mechanism includes: a main body, including a horizontal cavity, and a vertical cavity connected to the horizontal cavity; a fluid inlet is provided at one end of the horizontal cavity; a first moving rod is laterally arranged in the horizontal cavity and can move axially along the horizontal cavity; the end of the first moving rod away from the fluid inlet extends to the outside of the main body; a recess is provided on the first moving rod; a reset spring is sleeved on the first moving rod; a stopper is provided on the first moving rod that abuts against one end of the reset spring; the other end of the reset spring is connected to the inner wall of the end of the main body away from the fluid inlet; a second moving rod is vertically arranged in the vertical cavity; the second moving rod is transmission-connected to the first moving rod; a trigger part is provided on the upper end of the second moving rod; a pressure sensor is arranged in the lifting door and is located directly above the trigger part.

[0020] In a further embodiment, the outer diameter of the first moving rod at the intersection with the recessed portion gradually decreases in a direction away from the fluid inlet.

[0021] In a further embodiment, a blocking piece is provided on one end of the first moving rod extending out of the body; when the reset spring is at its original length, the bottom end of the second moving rod is in the recessed portion, and the blocking piece abuts against the body.

[0022] Beneficial effects: (1) According to the demand for water flow regulation, the working mode of the overflow weir is adjusted so that the water flows based on the water exchange flow path, the water flow path becomes longer, the water flow degree and water exchange degree of the tributary river channel are increased, and the ecological environment in the river channel is maintained; the water flow path is optimized, the water flow path becomes longer, the scheduling is optimized, and the water dynamics of the river network are improved, and a variety of regulation methods can be realized, taking into account the needs of flood control and drainage.

[0023] (2) When there is no need to regulate the water flow, the water flows naturally and converges according to the main flow path. When there is a need to regulate the water flow, based on the changed water flow path, the channels are merged into a single long-channel with a single flow direction. When flowing in a single direction, the hydrodynamic force of the regional river network is enhanced, providing better hydraulic conditions for reducing pollutants in the channels; the water flow time in the channels is increased, thereby increasing the contact time between the water and the aquatic plants in the channels. The aquatic plants can adsorb more pollutants, significantly reducing the pollutant content in the channels. Description of the Drawings

[0024] Figure 1 is the planar design drawing of the water flow path of the present invention.

[0025] Figure 2 is the planar design drawing of the overflow weir regulating channel.

[0026] Figure 3 is the schematic assembly drawing of the overflow weir in the present invention.

[0027] Figure 4 is the internal structure drawing of the overflow weir.

[0028] Figure 5 is the schematic structure drawing of the water level warning mechanism.

[0029] Figure 6 is the cross-sectional view of the water level warning mechanism in different states.

[0030] Figure 7 is the enlarged partial structure drawing of the first moving rod.

[0031] Figures 1 to 7 The labels in are: support column 10, overflow weir 20, steel sheet pile 21, lifting door 22, jacking mechanism 30, water level warning mechanism 40, body 41, first moving rod 42, return spring 43, second moving rod 44, recess 45, trigger part 46, stop piece 47, fluid inlet 48, fluid inlet 49, stop part 410, column 50. Detailed Embodiments

[0032] Embodiment 1

[0033] This embodiment provides a method for regulating the water flow in a river channel, including the following steps: determining the confluence, defining the N channels that communicate with the confluence as the main river channels, and defining the channels that connect between any two main river channels as the tributary channels;

[0034] Constructing at the confluence MA group of overflow weirs 20, and adjacent overflow weirs 20 are used to control the flow state of the corresponding river channels; the overflow weir 20 is set to include at least the following modes: an open mode, a closed mode, and an overflow mode;

[0035] When there is a need for water flow regulation, based on the confluence situation of the mainstream river channel and the tributary river channel, the mode of each group of overflow weirs 20 is regulated to obtain a water flow path required for water flow regulation; the water flow path at least includes: a main flow path and a water exchange flow path.

[0036] Taking Changzhou Fengshou River - Xiaolonggang as an example, the specific description is as follows: The crisscross arrangement of Fengshou River and Xiaolonggang can be regarded as the river channels converging at the same position ( A at this point), and this position is set as the confluence. As Figure 1 shown, Xiaolonggang and Fengshou River can be respectively divided into mainstream river channels: Xiaolonggang (upper) and Fengshou River (right). Fengshou River and Xiaolonggang divide the surrounding land into four areas, and the land between every two mainstream river channels is an area. One of the areas contains other river channels, and this river channel is defined as a tributary river channel. The tributary river channel is located between two adjacent mainstream river channels and is connected to its corresponding adjacent two mainstream river channels.

[0037] At A four groups of overflow weirs 20 are set. The overflow weir 20 includes the following working modes: an open mode, a closed mode, and an overflow mode. The open mode is that the overflow weir 20 descends, and its height is less than the river water level. The closed mode is that the overflow weir 20 ascends, and its height is much greater than the river water level. The overflow mode is that the overflow weir 20 partially ascends, and in the case of a relatively high river water level, it can flow into other river channels. In the natural state, all overflow weirs 20 are in the open mode, that is, when there is no need for water flow regulation, all overflow weirs 20 are in the open mode, so that the water flow in each mainstream river channel and tributary river channel is naturally regulated without interference. In the natural state, the water flow path of the mainstream river channel is diverse. For example, the water in the mainstream river channel Fengshou River (right) can flow directly into the mainstream river channel Xiaolonggang (lower) without passing through the tributary river channel.

[0038] The M establishment process of the group of overflow weirs 20 is as follows: Pour a support column 10 at the center of the confluence, and arrange M a group of steel sheet piles 21 circumferentially around the support column 10; Pour one side of the steel sheet pile 21 on the support column 10, and drive the other side of the steel sheet pile 21 into the corresponding river bank; Install a lifting door 22 on each steel sheet pile 21; Set a water level warning mechanism 4040 in the lifting door 22. The water level warning mechanism 4040 is set to send a warning message when the water level of the mainstream river channel drops to the water level threshold after water flow regulation; Based on the warning message, regulate the mode of each group of overflow weirs 20.

[0039] The following is a specific expansion and description: At Figure 2 the center, pour and support column 10, and set four groups of steel sheet piles 21 circumferentially around the support column 10. One side of the steel sheet pile 21 is poured on the side of the support column 10, and the other side of the steel sheet pile 21 is driven into the corresponding river bank (land). As A shown, when the adjacent overflow weirs 20 are in the closed mode, the corresponding main river channel is separated from other river channels. Figure 2

[0040] The steps for generating the water flow path are as follows: Define the main river channel where the water body is currently located as φ 1, and the main river channel where the water body finally flows to as φ 2; At least one tributary river channel connecting the main river channel φ 1 and the main river channel φ 2 is the water flow regulation river channel ζ i , where i is the number of water flow regulation river channels; Use φ 1, φ 2 to determine the main flow path, and the water flow regulation river channel ζ i determines the water flow change path: In the natural state, each overflow weir is in the open mode, and the water flow naturally flows from the main river channel φ 1 to the main river channel φ 2; When there is a need for water flow regulation, based on the ecological treatment requirements, select several tributary river channels with the required flow path length in the water flow regulation river channel ζ i to form the water flow change path, and based on the water flow change path, control the overflow weir at the intersection of the water flow change path and the main flow path to switch to the overflow mode, and other overflow weirs to switch to the closed mode.

[0041] The following is a specific description in combination with Figure 1 and 2 : In this embodiment, φ 1 is the Fengshou River (right), φ 2 is the Xiaolonggang (down), and the water flow regulation river channel ζ 4 is the Xiaolonggang (up), S 338 River, Shengzhuang River, Fengshou River (left), where i = 4. The above up, down, left, and right directions are the same as Figure 1 ​It is consistent up, down, left, and right. In the natural state, water in the water body mainly flows through the Fengshou River (right) to the Xiaolonggang (down). Therefore, the water flow path from the Fengshou River (right) to the Xiaolonggang (down) is taken as the main flow path. When regulating the water flow, such as in the dry season in winter, the water volume in the tributary river is small and the degree of water flow regulation is low. Without artificial intervention, it will affect the ecological system of the tributary river. At this time, water is replenished to the Fengshou River (right) of the river channel. The water level of this main river channel increases, and the overflow weir 20 is regulated so that the adjacent overflow weirs 20 control the flow state of the corresponding river channels, thereby changing the flow path of the main river channel. According to the order of the Fengshou River (right), Xiaolonggang (upper), S River 338, Shengzhuang River, Fengshou River (left), Xiaolonggang (down), a water exchange path is established. In the natural state, no artificial intervention is adopted for each river channel, and it is allowed to flow naturally. Therefore, in the natural state, each overflow weir 20 is in the open mode. When there is a need for water flow regulation, S The working modes of the overflow valves connected to the riverbanks where River 338 and Shengzhuang River are located, and the overflow valves connected to the opposite riverbanks of these riverbanks are adjusted to the closed mode, and the working modes of the remaining overflow valves are adjusted to the overflow mode, so that the water body flows according to the water exchange path. Under the adjustment of the overflow weir 20, the flow path of the water body in the water replenishing river channel, the Fengshou River (right), becomes longer, and the water flow regulation path also becomes longer, increasing the degree of water flow regulation in the tributary river channel, driving the mixing of water at each layer, promoting the degradation of pollutants, promoting the absorption of nutrients by aquatic plants, and maintaining the river channel ecological environment.

[0042] The above water flow regulation requirements are as follows:

[0043] (1) In the dry season in winter, there is a problem of low water level in the tributary river channel, which affects the survival of various organisms in the river channel. Water needs to be replenished to the tributary river channel. Therefore, water flow regulation is required, a water exchange path is selected, and the water body in the main river channel flows to the tributary river channel to raise the water level of the tributary river channel and improve the water fluidity of the tributary river channel, maintaining a good living environment in the river channel.

[0044] (2) When the main river channel serves as an ecological buffer zone and there is a need to reduce pollutants in the tail water of the sewage treatment plant, it is necessary to increase the water flow process in the main river channel and increase the water retention time to ensure the maximum reduction of pollutants. Therefore, water flow regulation is required, a water flow path is selected, and the water body in the main river channel flows to the tributary river channel. The main river channel and the tributary river channel are combined into a single river channel with a long single flow direction. When flowing in a single direction, the hydrodynamic force of the regional river network is enhanced, providing better hydraulic conditions for pollutant reduction in the river channel; it also increases the water retention time in this river channel, and further increases the contact time between the water body and the aquatic plants (aquatic plants planted in advance in the main river channel and tributary river channel for adsorbing pollutants) in the river channel, enabling more pollutants to be degraded and significantly reducing the pollutant content in the river channel.

[0045] (3) When flood control and drainage requirements are encountered, according to the dispatching principles of regional flood control or drainage, and adjust the working mode of the corresponding overflow valve to meet the flood control and drainage requirements.

[0046] The working process of the water level warning mechanism 40 is as follows: After the water body flow is regulated, when φ 1 the water level drops below the water level threshold, the water level warning mechanism 40 issues a warning message, and the warning message at least includes: pressure value; based on the warning message, adjust the modes of all overflow valves to the open mode.

[0047] Two groups of water level warning mechanisms 40 are installed in each overflow weir 20. When the water level of the replenishment river Fengshou River (right) drops after the water body flow is regulated for a certain period of time, when it drops below the water level threshold, the water level warning mechanism 40 issues a warning message, and the warning message includes: pressure value. When the warning message is issued, the pressure value is 0 or close to 0. Based on the warning message, adjust the working states of all overflow valves to the open mode, restore the working mode under natural conditions, and enable the natural exchange of water bodies in each river.

[0048] Embodiment 2

[0049] As Figures 1 to 7 shown, this embodiment provides a river water body flow regulation system for implementing the river water body flow regulation method described in Embodiment 1. The system includes: a first module, which is set to determine the confluence, and define the N rivers communicating with the confluence as main river channels, and define the rivers connecting between any two main river channels as tributary channels;

[0050] M A group of overflow weirs 20 are arranged at the confluence, and adjacent overflow weirs 20 are used to control the flow states of the corresponding rivers; the overflow weir 20 is set to at least include the following modes: open mode, closed mode, and overflow mode;

[0051] A second module, which is set to, when there is a water body flow regulation requirement, regulate the modes of each group of overflow weirs 20 based on the confluence situation of the main river channels and tributary channels to obtain the water body flow path required for water body flow regulation; the water body flow path at least includes: main flow path and water exchange flow path.

[0052] The system further includes a support column 10, a jacking mechanism 30, and a water level warning mechanism 40. The support column 10 is fixed at the center of the intersection by pouring. Four groups of overflow weirs 20 are arranged circumferentially along the support column 10. Four groups of jacking mechanisms 30 are provided, which are respectively connected to the overflow weirs 20 in a driving manner to realize the lifting of the overflow weirs 20. The jacking mechanism 30 adopts a hydraulic pump. At least two water level warning mechanisms 40 are installed in each overflow weir 20. One water level warning mechanism 40 is installed close to the water-facing side of the overflow weir 20, and the other water level warning mechanism 40 is installed close to the backwater side of the overflow weir 20, and each water level warning mechanism 40 does not interfere with each other.

[0053] The overflow weir 20 is mainly composed of a steel sheet pile 21 and a lifting door 22. One side of the steel sheet pile 21 is poured on the side of the support column 10, and the other side of the steel sheet pile 21 is driven into the river bank. A column 50 is fixed at the bottom of the steel sheet pile 21, and the column 50 is buried in the bottom of the river during construction. A protective housing is provided on the steel sheet pile 21. A hollow part is provided on the steel sheet pile 21 for installing the lifting door 22. The lifting door 22 is located in the hollow part, and both sides of the lifting door 22 are slidably connected to the steel sheet pile 21. The jacking mechanism 30 is arranged below the lifting door 22 and at the bottom of the hollow part. When the jacking mechanism 30 works, the lifting door 22 moves in the vertical direction. Fluid inlets 48 are provided on both sides (the water-facing side and the backwater side) of the lifting door 22, so as to be applicable to different water replenishing channels and water flow paths. The height of the fluid inlet 48 is set according to the actual working conditions of the river water level, and the height of the fluid inlet 48 is the water level threshold. The inside of the lifting door 22 has a cavity communicating with the fluid inlet 48. In the natural state, the jacking mechanism 30 is in the shortest state, the lifting door 22 descends, and the highest height of the lifting door 22 is less than the water level of each river.

[0054] The water level warning mechanism 40 is arranged in the cavity. Among them, the water level warning mechanism 40 includes: a body 41, a first moving rod 42, a return spring 43, a second moving rod 44, and a pressure sensor. Among them, the body 41 itself has a horizontal cavity and a vertical cavity communicating with the horizontal cavity. A fluid inlet 49 is provided at one end of the horizontal cavity. In this embodiment, as Figure 6 shown, the fluid inlet 49 is located at the left end of the horizontal cavity.

[0055] The first moving rod 42 is transversely arranged in the horizontal cavity, and the first moving rod 42 can move axially along the horizontal cavity. One end of the first moving rod 42 away from the fluid inlet 49 extends outside the body 41, and a through hole adapted to the first moving rod 42 is provided at the right end of the body 41, so that the first moving rod 42 has the freedom of horizontal movement. A stop piece 47 is installed on the end of the first moving rod 42 extending out of the body 41. The stop piece 47 is fixed on the first moving rod 42. A recess 45 is provided on the first moving rod 42. As Figure 7As shown in the figure, along the direction away from the fluid inlet 49, the outer diameter of the first moving rod 42 gradually decreases at the junction with the recess 45. When the first moving rod 42 moves to the right, there is a gentle slope between the first moving rod 42 and the recess 45, which is beneficial for the second moving rod 44 to slide out of the recess 45. At the other junction of the first moving rod 42 and the recess 45, the diameter from the first moving rod 42 to the recess 45 is reduced by a fault, or in other words, the intersection angle between the first moving rod 42 and the recess 45 is a right angle, preventing the second moving rod 44 from sliding out of the recess 45 when the first moving rod 42 moves to the left. The return spring 43 is sleeved on the first moving rod 42. A stop portion 410 is provided on the first moving rod 42 to abut against one end of the return spring 43. The other end of the return spring 43 is fixedly connected to the inner wall of the end of the body 41 away from the fluid inlet 49. When the return spring 43 is in its original length, the bottom end of the second moving rod 44 is inside the recess 45, and the baffle 47 abuts against the body 41. As Figure 6 shown, in this embodiment, the right end of the return spring 43 is fixed to the inner wall of the end of the body 41, and the left end abuts against the stop portion 410. The second moving rod 44 is vertically arranged in the vertical cavity. The second moving rod 44 is movably connected to the first moving rod 42. A trigger portion 46 is installed at the upper end of the second moving rod 44. The trigger portion 46 is spherical. The pressure sensor is installed inside the lifting door 22 and is located directly above the trigger ball. The pressure sensor is a waterproof pressure sensor, such as the model CYYZ 39 A high-protection pressure transmitter.

[0056] When regulating the water body flow, as Figure 2 shown, the working modes of the overflow valves 2 and 4 are adjusted to the closed mode, and the working modes of the overflow valves 1 and 3 are adjusted to the overflow mode. The water level of the replenishment river, Fengshou River (right), rises and is higher than the fluid inlet 48. The water body continuously enters the cavity from the fluid inlet 48 and then enters the horizontal cavity from the fluid inlet 49. When the water body continuously fills the left side of the horizontal cavity, it pushes the first moving rod 42 to move to the right. The stop portion 410 compresses the return spring 43, and the second moving rod 44 slides out of the recess 45 due to the rightward movement of the first moving rod 42. As Figure 6 shown in 6 of a the figure, the second moving rod 44 slides out of the recess 45 and its height rises, causing the trigger portion 46 to rise in height and squeeze the pressure sensor, so that the pressure sensor always detects the presence of pressure and transmits the pressure information to an external controller (or computer). As Figure 6 shown in 6 of bAs shown in the figure, after the water flow regulation has been carried out for a period of time, the water level of the replenishment river, Fengshou River (right), drops, making the water level lower than the height of the fluid inlet 48. As a result, the water body cannot enter the cavity from the fluid inlet. The cavity loses the continuous external pressure. The return spring 43 returns due to its large elasticity, causing the first moving rod 42 to move to the left, squeezing the water body in the horizontal cavity, discharging the water body from the main body 41. Moreover, the second moving rod 44 falls back into the recess 45 again, the height of the trigger part 46 decreases, and it cannot contact the pressure sensor. The pressure signal on the pressure sensor changes, and the pressure value at this time is transmitted to the external controller. The external controller judges based on the pressure value that the water flow regulation has been basically completed, and then adjusts the working modes of each overflow weir 20 to restore to the natural state.

Claims

1. A method for regulating the flow of river water bodies, characterized in that, The following steps are involved: Determine the confluence, and define the N rivers communicating with the confluence as main river channels, and define the river channels connecting any two main river channels as tributary river channels; Construct at the confluence M a group of overflow weirs, and adjacent overflow weirs are used to control the flow state of the corresponding river channels; the overflow weirs are provided with at least the following modes: an open mode, a closed mode, and an overflow mode; the M establishment process of the group of overflow weirs is as follows: pour support columns at the center of the confluence, and arrange M a group of steel sheet piles circumferentially around the support columns; pour one side of the steel sheet piles on the support columns, and drive the other side of the steel sheet piles into the corresponding river banks; install lifting gates on each steel sheet pile; arrange a water level warning mechanism inside the lifting gates, and the water level warning mechanism is configured to send a warning message when the water level of the main river channel drops to a water level threshold after the water flow is regulated; regulate the modes of each group of overflow weirs based on the warning message; The working process of the water level warning mechanism is as follows: After the water body flow is regulated, when φ 1 the water level drops below the water level threshold, the water level warning mechanism sends out a warning message, and the warning message at least includes: the pressure value; all overflow valve modes are adjusted to the open mode based on the warning message; When there is a need for water flow regulation, the pattern of each overflow weir is regulated based on the confluence of the main river channel and the tributary river channel to obtain the water flow path required for water flow regulation; the water flow path includes at least: the main flow path and the water exchange flow path, and the generation steps are as follows: Define the main river channel where the water body is currently located as φ 1, and the main river channel where the water body finally flows as φ 2; at least one tributary channel connected to the main river channel φ 1 and the main river channel φ 2 is the water body flow regulation channel ζ i , where i is the number of water body flow regulation channels; With φ 1. φ 2. Determine the main flow path and regulate the river channel through water body flow ζ i Determine the alternative flow path: In the natural state, each overflow weir is in the open mode, and the water flow is from the mainstream river channel φ 1. The natural flow direction is to the mainstream river channel φ 2; When there is a need for water body flow regulation, based on the ecological treatment requirements, in the river channel for water body flow regulation ζ i Select several tributary river channels with the required flow path length to form the alternative flow path, and based on the alternative flow path, control the overflow weir at the intersection of the alternative flow path and the main flow path to switch to the overflow mode, and other overflow weirs to switch to the closed mode.

2. A river channel water flow regulation system for implementing a river channel water flow regulation method as described in claim 1, characterized in that, The system comprises: The first module is configured to determine an intersection, and define the N rivers communicating with the intersection as main river channels, and define the rivers connecting between any two main river channels as tributary river channels; M A group of overflow weirs are arranged at the confluence, and adjacent overflow weirs are used to control the flow state of the corresponding river channels; the overflow weirs are set to include at least the following modes: an open mode, a closed mode, and an overflow mode; The second module is configured to control the mode of each overflow weir based on the confluence of the main river channel and the tributary river channel when there is a need for water flow control, so as to obtain the water flow path required for water flow control; the water flow path includes at least: the main flow path and the water exchange flow path.

3. The river water body flow regulation system according to claim 2, wherein Also includes: Support columns are provided at the center of the intersection; M A group of overflow weirs are arranged circumferentially along the support columns; A lifting mechanism, correspondingly connected to the overflow weir by transmission; The water level warning mechanism is arranged inside the overflow weir.

4. The river water body flow regulation system according to claim 2, characterized in that, The overflow weir comprises: A steel sheet pile connected to a support column on one side and to a river bank on the other side; the steel sheet pile is provided with a hollow portion; A lifting door is located in the hollow portion and is slidably connected to the steel sheet pile; fluid inlets are opened on both side surfaces of the lifting door, and a cavity connected to the fluid inlet is provided inside the lifting door.

5. The river water body flow regulation system according to claim 3, wherein, The water level warning mechanism is arranged in the cavity, wherein the water level warning mechanism includes: The body comprises a horizontal cavity and a vertical cavity connected to the horizontal cavity; a fluid inlet is provided at one end of the horizontal cavity; a first movable rod, disposed transversely within the horizontal cavity and movable axially along the horizontal cavity; an end of the first movable rod away from the fluid inlet extends outside the body; and a recess is provided on the first movable rod; A return spring is sleeved on the first movable rod; the first movable rod is provided with a stopper abutting against one end of the return spring; the other end of the return spring is connected to the inner wall of the end of the body away from the fluid inlet; A second moving rod is vertically disposed in the vertical cavity; the second moving rod is transmission-connected to the first moving rod; a trigger portion is provided at an upper end of the second moving rod; The pressure sensor is arranged in the lifting door and is located just above the triggering portion.

6. A river water flow control system according to claim 5, characterized in that: In a direction away from the fluid inlet, the outer diameter of the first moving rod at the intersection with the recessed portion gradually decreases.

7. A river water flow control system according to claim 5, characterized in that: A blocking piece is provided on one end of the first moving rod extending out of the body; when the reset spring is at its original length, the bottom end of the second moving rod is in the recessed portion, and the blocking piece abuts against the body.

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