Method for regulating a seepage ecosystem of a dry river bed

Abstract

The application provides a dry river channel seepage ecological system adjusting method, relates to the river channel ecological management technical field, and the system comprises a hidden flow interception structure, a water guide control structure, a filter structure layer and a control terminal; the hidden flow interception structure is used for separating the river channel into an upstream of the river channel and a downstream of the river channel; the filter structure layer is arranged on the water receiving surface of the upstream of the river channel; the water guide control structure comprises an underground gallery, a water distribution pipeline, an electromagnetic valve and a flowmeter; the underground gallery is arranged between the upper anti-seepage wall and the lower anti-seepage wall, a plurality of water distribution pipelines are arranged in the underground gallery along the width direction of the two banks of the river channel, and the water distribution pipelines are respectively provided with electromagnetic valves and flowmeters; the control terminal is used for collecting flow data detected by the flowmeter and adjusting the opening degree of the electromagnetic valve according to the flow data, so as to adjust the water guide amount of the water distribution pipeline; in the scheme, the underground water blocking effect is constructed, thereby generating the ground water guide of the river channel seepage, supplementing the surface stream of the dry river channel, and maintaining the ecological balance of the underground water supplement and the ground water supplement of the river channel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of river ecological management, in particular to a method for regulating the seepage ecological system of a dry river. BACKGROUND

[0002] China has a vast territory, and there are a large number of small and medium-sized rivers. Since the 1980s of last century, with the growth of population, the growth of economic volume and the acceleration of urbanization, the substantial increase in water consumption has dramatically changed the runoff pattern of small and medium-sized rivers. Among the more than 45,000 rivers in China with an area of more than 50 square kilometers, more than 26,700 rivers, accounting for 57%, have degenerated into seasonal dry rivers. Especially in the central, eastern and northern regions, the lack of water resources is serious, and most of the small and medium-sized rivers have shown signs of dryness, with dry riverbeds, shrinking riverbeds and almost completely degraded ecological environment.

[0003] A common phenomenon of dry rivers is that the valley runoff formed by the pore water of the two sides of the mountain quickly penetrates into the deposited sand and gravel layer about 150-300m out of the mountain pass, and the surface layer of the downstream river is completely dry. In order to utilize the valley runoff formed by pore water, a comprehensive development of surface and underground runoff, i.e. underground water collection engineering, is currently used, which generally consists of a cutoff wall, a water inlet part, a water collection well, a water delivery part, etc. The cutoff wall is built below the riverbed, with the top elevation flush with the riverbed, without raising the riverbed, so that the flood can be safely discharged. Compared with other dam types, the cutoff wall has the advantages of less water evaporation loss, high water utilization rate, less siltation and long service life. However, since the underground seepage is intercepted, the downstream groundwater level is inevitably affected, which will destroy the ecological environment. Therefore, from the perspective of ecological environment protection system, it is the development direction to systematically study and repair dry rivers. The traditional seepage utilization technology mainly emphasizes the utilization of seepage water to supplement water resources, which deviates from the original ecological natural law and is not conducive to the ecological restoration of the river. SUMMARY

[0004] The purpose of the present application is to provide a dry river seepage ecological regulation system and a regulation method, which constructs an underground water blocking effect to generate river seepage ground water diversion, supplement dry river surface runoff, and maintain the ecological balance of underground and surface water replenishment.

[0005] To achieve the above purpose, in a first aspect, the present application provides a dry river seepage ecological regulation system applied to the upstream gorge of a river, which comprises a cutoff structure, a water diversion control structure, a filter structure layer and a control terminal.

[0006] The river is divided into bedrock and undisturbed soil layer from bottom to top.

[0007] The cut-off structure comprises an upper anti-seepage wall and a lower anti-seepage wall arranged in the undisturbed soil layer in the vertical direction to separate the river channel into an upstream of the river channel and a downstream of the river channel.

[0008] The filter structure layer is arranged on the water-facing surface of the upstream of the river channel and above the undisturbed soil layer.

[0009] The water guide control structure comprises an underground gallery, water distribution pipes, electromagnetic valves and flow meters. The underground gallery is arranged between the upper anti-seepage wall and the lower anti-seepage wall. A plurality of water distribution pipes are arranged in the underground gallery in the width direction of the river channel. The water inlet ends of the water distribution pipes extend to the filter structure layer in the upstream of the river channel through one side of the underground gallery. The water outlet ends of the water distribution pipes extend to the undisturbed soil layer in the downstream of the river channel through the other side of the underground gallery. The electromagnetic valves and the flow meters are arranged on each water distribution pipe.

[0010] The control terminal is used to collect the flow data detected by the flow meters and adjust the opening degree of the electromagnetic valves according to the flow data to adjust the water guide amount of the water distribution pipes.

[0011] Further, the upper anti-seepage wall and the lower anti-seepage wall are arranged oppositely, and the bottom of the lower anti-seepage wall extends into the bedrock.

[0012] Further, the filter structure layer comprises a block stone layer, a pebble layer and a sand and gravel layer arranged from outside to inside.

[0013] Further,

[0014] The particle size of the block stone layer is 20-30 cm, and the laying thickness is 0.5-1.0 m.

[0015] The particle size of the pebble layer is 5-8 cm, and the laying thickness is 1.0-1.2 m.

[0016] The particle size of the pebble layer is less than 2 cm, and the laying thickness is 1.2-1.5 m.

[0017] Further, the underground gallery is a concrete box structure. The top plate of the underground gallery is connected to the upper anti-seepage wall through embedded steel bars, and the bottom plate of the underground gallery is connected to the lower anti-seepage wall through embedded steel bars.

[0018] The side plates of the underground gallery are provided with holes for assembling the water distribution pipes. Rubber rings are used to seal and stop water between the holes and the water distribution pipes.

[0019] Further, the water distribution pipes are connected to branch pipes. The branch pipes are provided with sand valves. The bottom of the underground gallery is provided with a drainage ditch for collecting sand, stones and water discharged by the sand valves.

[0020] Further, the water inlet end of the water diversion pipe is provided with a filter screen.

[0021] Further, the water diversion control structure further comprises a manhole, which is arranged as a maintenance channel and an automatic control wiring channel, at a downstream of the submerged flow structure close to the bank, and the well mouth of the manhole is slightly downstream of the riverbed to prevent surface stream from flowing in.

[0022] In the second aspect, the application provides a regulating method of the dry river channel seepage ecological system, which is applied to the dry river channel seepage ecological regulating system, and the regulating method comprises the following steps:

[0023] S1. When the electromagnetic valve in the water diversion control structure is in the closed state, the water diversion amount V and the underground water level E on both sides of the downstream river channel are continuously collected in a long sequence, the data set V of the water diversion amount V changing with time is calculated, and the data set E of the underground water level on both sides of the downstream river channel in units of holes changing with time is calculated. i (i=1, 2, 3……365), and the data set E of the underground water level on both sides of the downstream river channel in units of holes changing with time is calculated. i (i=1, 2, 3……365), E0 is the original underground water level;

[0024] S2. According to the data set TV of the total water diversion amount i (i=1, 2, 3……365), and the data set dtE of the underground water level change changing with time is calculated. i (i=1, 2, 3……365), the underground water level change caused by the total water diversion amount TV is calculated.

[0025] dtE=b0+b1*TV; Equation 1

[0026] Wherein, TV is the total water diversion amount, b0 is the predicted intercept of the regression equation, and b1 is the predicted slope of the regression equation.

[0027] Wherein: b1= ; Equation 2

[0028] b0= ; Equation 3

[0029] Wherein i=1, 2, 3……365, n=365.

[0030] S4. According to the design requirement of the underground water level change amplitude, the total water diversion amount is calculated.

[0031] The total water diversion amount TV=(dtE-b0) / b1.

[0032] S5. According to the total water diversion amount TV, the average water diversion amount Vq is calculated, and the threshold value of the average water diversion amount Vq is stored in the database.

[0033] S6. The flow data of the water diversion pipeline is collected in real time by the flow meter, and the flow data is uploaded to the control terminal. The control terminal compares the flow data with the average water yield Vq threshold value. If the flow data is lower than the average water yield Vq, the control terminal controls the increase of the opening degree of the electromagnetic valve, so that the flow data is within the range of the average water yield Vq.

[0034] If the flow data is higher than the average water yield Vq threshold value, the control terminal controls the decrease of the opening degree of the electromagnetic valve, so that the flow data is within the range of the average water yield Vq.

[0035] Further, in step S2,

[0036] TV i = ;

[0037] dtE i =E i -E0(i=1,2,3……365).

[0038] By adopting the technical scheme, the dry river channel seepage ecological regulation system and the regulation method have the following technical effects compared with the prior art:

[0039] In the regulation system, the interception and underground flow structure includes an upper anti-seepage wall and a lower anti-seepage wall arranged in the undisturbed soil layer in the vertical direction, so as to separate the river channel into an upstream of the river channel and a downstream of the river channel; the filter structure layer is arranged on the water-facing surface of the upstream of the river channel and above the undisturbed soil layer; in the water guide control structure, the underground gallery is arranged between the upper anti-seepage wall and the lower anti-seepage wall, a plurality of water diversion pipelines are arranged in the underground gallery along the width direction of the river channel, the water inlet end of the water diversion pipeline extends to the filter structure layer in the upstream of the river channel through one side of the underground gallery, the water outlet end of the water diversion pipeline extends to the undisturbed soil layer in the downstream of the river channel through the other side of the underground gallery, and the electromagnetic valve and the flow meter are arranged on each water diversion pipeline respectively; by controlling the opening and closing degree of the water diversion pipeline, the underground flow in the upstream of the river channel can be guided into the downstream of the river channel, so as to supplement the underground water without affecting the underground water level of the downstream, meanwhile, the interception and underground flow structure can produce the underground water blocking effect, so as to produce the river channel seepage ground water guide and supplement the surface stream of the dry river channel; the control terminal is used for collecting the flow data detected by the flow meter, and adjusting the opening degree of the electromagnetic valve according to the flow data, so as to adjust the water guide amount of the water diversion pipeline. The electromagnetic valve can be opened moderately according to the automatic control, the underground water diversion is restored, the ecological balance of the underground water supplement and the ground water supplement is maintained, and the ecological restoration of the dry river channel is beneficial. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art of the present application, the drawings required to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0041] Figure 1 A schematic diagram of the dry river channel seepage ecological regulation system provided by the present application and the mountain and river channel layout is shown in the figure.

[0042] Figure 2 A schematic diagram of the structure of the dry river channel seepage ecological regulation system provided by the present application is shown in the figure.

[0043] Figure 3 A schematic diagram of the structure of the dry river channel seepage ecological regulation system provided by the present application is shown in the figure. Figure 1 A-A sectional view (omitting the structure on both banks of the river channel). BRIEF DESCRIPTION OF DRAWINGS

[0045] 100 - subsurface flow interception structure; 110 - upper impermeable wall; 120 - lower impermeable wall; 200 - water guide control structure; 210 - underground gallery; 211 - drainage ditch; 220 - water distribution pipeline; 221 - branch pipeline; 230 - solenoid valve; 240 - flow meter; 250 - maintenance well; 300 - filter structure layer; 310 - block stone layer; 320 - pebble layer; 330 - sand and gravel layer; 400 - above-ground control room. DETAILED DESCRIPTION

[0046] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0047] In view of the current situation that the ecological environmental impact is generally not considered in the use of seepage water in dry river channels, and the situation that the existing river channel water replenishment is mainly based on external water replenishment which is not suitable for areas with less water resources, an ecological regulation system is proposed for proper modification and construction of dry river channels to make full use of seepage water resources.

[0048] As shown in Figure 1 , Figure 2 and Figure 3 , the dry river channel seepage ecological regulation system provided by the embodiments of the present application is mainly applied to the gorge at the upstream of the river channel, which comprises a subsurface flow interception structure 100, a water guide control structure 200, a filter structure layer 300 and a control terminal.

[0049] The river channel is divided into bedrock and undisturbed soil layer from bottom to top;

[0050] The intercepting structure 100 includes an upper impervious wall 110 and a lower impervious wall 120 arranged in the undisturbed soil layer in the vertical direction, the upper impervious wall 110 is located above the lower impervious wall 120, and the river channel is divided into the upstream of the river channel and the downstream of the river channel;

[0051] The filtering structure layer 300 is arranged on the water-facing surface of the upstream of the river channel and above the undisturbed soil layer, and the filtering structure layer 300 is adjacent to the upper impervious wall 110;

[0052] The water guide control structure 200 includes an underground gallery 210, a water distribution pipe 220, an electromagnetic valve 230 and a flow meter 240; the underground gallery 210 is arranged between the upper impervious wall 110 and the lower impervious wall 120, a plurality of water distribution pipes 220 are arranged in the underground gallery 210 in the width direction of the two banks of the river channel, the water inlet end of the water distribution pipe 220 extends to the filtering structure layer 300 in the upstream of the river channel through one side of the underground gallery 210, the water outlet end of the water distribution pipe 220 extends to the undisturbed soil layer in the downstream of the river channel through the other side of the underground gallery 210, and the electromagnetic valve 230 and the flow meter 240 are arranged on each water distribution pipe 220 respectively; by controlling the opening degree of the water distribution pipe 220, the underground runoff in the upstream of the river channel can be guided to the downstream of the river channel to supplement the underground water, and the downstream underground water level is not affected, at the same time, the intercepting structure 100 can generate the underground water blocking effect, thereby generating the river seepage ground water guide and supplementing the dry river surface stream;

[0053] The control terminal is used for collecting the flow data detected by the flow meter 240 and adjusting the opening degree of the electromagnetic valve 230 according to the flow data, so as to adjust the water guide amount of the water distribution pipe 220; the electromagnetic valve 230 can be opened moderately according to the automatic control, the underground water distribution is restored, the ecological balance of the underground water supplement and the ground water supplement of the river is maintained, and the ecological restoration of the dry river channel is beneficial.

[0054] In a preferred embodiment, the upper impervious wall 110 and the lower impervious wall 120 are arranged oppositely, the upper impervious wall 110 and the lower impervious wall 120 are concrete impervious wall structures, are arranged at the narrow part of the river channel, and the two banks are rock with small water permeability. The intercepting structure 100 is arranged on the weakly weathered bedrock rock mass, the two sides of the upper impervious wall 110 and the lower impervious wall 120 are connected with the fresh bedrock of the mountain body, and the bottom of the lower impervious wall 120 extends into the bedrock, so as to block the underground runoff, and the underground runoff can be guided to the downstream of the river channel through the plurality of water distribution pipes 220 to supplement the underground water.

[0055] In a preferred embodiment, the filtering structure layer 300 includes a block stone layer 310, a pebble layer 320 and a sand and gravel layer 330 arranged from outside to inside.

[0056] The particle size of the block stone layer 310 is 20-30 cm, and the laying thickness is 0.5-1.0 m; the particle size of the pebble layer 320 is 5-8 cm, and the laying thickness is 1.0-1.2 m; the particle size of the pebble layer 320 is less than 2 cm, and the laying thickness is 1.2-1.5 m, and the water quality is clear by using the layered filtration, and the water inlet end of the water distribution pipeline 220 extends to the pebble layer 320 in the upstream of the river channel through one side of the underground gallery 210, so as to guarantee the clarity of the underground water in the downstream of the guide river channel.

[0057] In a preferred embodiment, the underground gallery 210 is a concrete box type structure, the top plate of the underground gallery 210 is connected with the upper anti-seepage wall 110 through embedded steel bars, and the bottom plate of the underground gallery 210 is connected with the lower anti-seepage wall 120 through embedded steel bars.

[0058] The side plate of the underground gallery 210 is provided with a hole for assembling the water distribution pipeline 220, and a rubber ring is used for sealing and stopping water between the hole and the water distribution pipeline 220.

[0059] In a preferred embodiment, the water distribution pipeline 220 is connected with a branch pipeline 221, the branch pipeline 221 is provided with a sand discharge valve, the bottom of the underground gallery 210 is provided with a drainage ditch 211 for collecting and discharging the sand, stone and water discharged by the sand discharge valve during the maintenance process, and a support pier is arranged in the underground gallery 210 for supporting the water distribution pipeline 220.

[0060] In a preferred embodiment, the water distribution pipeline 220 adopts a DN500 steel pipe structure, and the water inlet end of the water distribution pipeline 220 is provided with a filter screen for filtering small impurities.

[0061] In a preferred embodiment, the electromagnetic valve 230 is a fixed-frequency electromagnetic valve 230, and 10 average opening degrees are set.

[0062] In a preferred embodiment, the water guide control structure 200 further comprises a maintenance well 250, the maintenance well 250 is used as a maintenance passage and an automatic control wiring passage, is arranged at the downstream of the submerged flow structure 100 close to the bank, is provided with a ladder, and the well mouth of the maintenance well 250 is slightly higher than the downstream riverbed to prevent the surface stream from flowing in.

[0063] In a preferred embodiment, the control terminal can be arranged in an above-ground control room 400 arranged at a mountain platform close to the bank, and is used for controlling the electromagnetic valve, collecting the flow, transmitting the data and the like.

[0064] In addition, the application further provides a regulating method of the dry river channel seepage ecological system, which is applied to the dry river channel seepage ecological regulating system.

[0065] First, we observed the raw groundwater level data within a 3-kilometer radius downstream of the river channel to understand the spatiotemporal changes in groundwater level in and around the river throughout the year. The purpose was to establish a reference system for comparing groundwater level fluctuations during the next stage of river diversion.

[0066] The observation method involved setting up observation sections every 500 meters along a 3-kilometer stretch downstream of the "River Channel Seepage Surface Water Diversion and Groundwater Distribution Ecological Regulation Project," which is essentially a dry river channel seepage ecological regulation system. At each section, an observation point was placed in the center of the river channel (at the transition zone between the channel and the riverbed). Further laterally along both banks of the section, an observation point was placed every 100 meters, covering a 300-meter area on both banks. A total of 7 observation points were set up at each section. Six observation sections were set up along the 3-kilometer stretch of the downstream river channel, for a total of 42 observation points.

[0067] The groundwater level data was observed over a period of one year, recording the groundwater level at 42 observation points. Observations were taken every 10 days from January to March; every 5 days from April to June; every 10 days from July to September; and every 5 days from October to December. Rainfall was recorded concurrently to establish the annual characteristics of groundwater dynamics at each observation point.

[0068] Secondly, in the first year of operation of the "River Infiltration Surface Water Diversion and Groundwater Distribution Ecological Regulation Project," the impact of different seasons and different water diversion / groundwater distribution volumes on the groundwater level of the downstream river was measured. The measurement method involved nine water diversion levels per season, with each measurement cycle lasting 10 days (5 days for measurement and 5 days for water level recovery). The opening of solenoid valve 230 controlled different water diversion levels, with a maximum opening of 10N, where N represents the number of distribution pipes. The groundwater distribution volume was measured using flow meter 240 within the water diversion control structure 200. The unit of flow meter 240 is FQi (m³). 3 / s, sampling frequency 1 hour, cumulatively forming the daily water distribution FDQ j = (j=1…5), the cumulative total water distribution for each level is FTQ= ;

[0069] The surface water conductance is determined using a weir method, with the flow rate measured by the weir in units of DQ. i For m 3 / s, sampling frequency 1 hour, accumulating the daily water diversion volume DDQ j = (j=1…5), the total water conduction volume for each level is DTQ = Groundwater level at observation point E j(j=1…5) is 1 day; after each water discharge level measurement, the electromagnetic valve 230 is fully opened for 5 days as the groundwater level recovery period.

[0070] The regulation method of the dry river channel seepage ecological system in the embodiment specifically includes:

[0071] S1. When the electromagnetic valve 230 in the water discharge control structure 200 is in a closed state, the water discharge V and the groundwater level E on both sides of the downstream river channel are continuously collected in a long sequence, and the data set V of the water discharge V changing with time is calculated i (i=1, 2, 3…365), and the data set E of the groundwater level on both sides of the downstream river channel in units of holes changing with time i (i=1, 2, 3…365), E0 is the original groundwater level;

[0072] S2. According to the total water discharge data set TV i (i=1, 2, 3…365), and the data set dtE of the groundwater level change changing with time i (i=1, 2, 3…365), the estimated value dtE of the groundwater level change caused by the total water discharge TV is calculated;

[0073] dtE=b0+b1*TV; Equation 1

[0074] Wherein, TV is the total water discharge, b0 is the predicted intercept of the regression equation, and b1 is the predicted slope of the regression equation;

[0075] Wherein: b1= ; Equation 2

[0076] b0= ; Equation 3

[0077] Wherein i=1, 2, 3…365, n=365;

[0078] S4. According to the design requirement of the groundwater level change amplitude, the total water discharge is calculated;

[0079] The total water discharge TV=(dtE-b0) / b1;

[0080] S5. According to the total water discharge TV, the average water discharge Vq is calculated, and the threshold value of the average water discharge Vq is stored in the database;

[0081] S6. The flow data of the water distribution pipeline 220 is collected in real time through the flow meter 240, and the flow data is uploaded to the control terminal. The control terminal compares the flow data with the threshold value of the average water discharge Vq. If the flow data is lower than the average water discharge Vq, the control terminal controls the increase of the opening degree of the electromagnetic valve 230, so that the flow data is within the range of the average water discharge Vq.

[0082] If the flow data is higher than the average water conductivity Vq threshold value, the control terminal controls the opening degree of the electromagnetic valve 230 to decrease, so that the flow data is within the range of the average water conductivity Vq.

[0083] Further, in step S2,

[0084] TV i = ;

[0085] dtE i =E i -E0(i=1,2,3……365).

[0086] Finally, an underground water level change warning mechanism is established, different seasonal underground water level amplitude warning values are formulated according to the riverway and surrounding whole-process underground water level data reference system under the natural environment, a pressure pipe at a typical position (two points on the left and right banks of a certain observation section) is selected as a warning source, a complete intelligent control system including signal transmission, signal reception, warning response, control operation, water conduction closing, warning cancellation and water conduction recovery is constructed, and finally the dry riverway seepage ecological regulation system is completely applied in an intelligent manner, and the riverway underground ecology and riverway ground ecology balance targets are scientifically achieved.

[0087] Under the premise that the riverway underground water level does not decrease obviously, a small amount of upstream stream or riverway sand layer seepage water is moderately used to perform ecological water replenishment on the riverway water surface, so as to offset the influence of water surface decrease caused by evaporation. The shallow underground water is reserved in the range of the interception and seepage prevention structure 100 through the interception and seepage prevention of the interception and seepage structure 100, so as to cause the underground water level upstream of the interception and seepage structure 100 to overflow and supplement the dry riverway surface runoff. At the same time, ecological regulation monitoring is performed through the riverway seepage ground water conduction, underground water distribution ecological regulation engineering and underground water level monitoring system, so as to form the ecological balance of the dry riverway surface water replenishment and underground water level.

[0088] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for regulating the seepage ecosystem in a dry riverbed, applied to a seepage ecological regulation system in a dry riverbed, the system being used in an upstream canyon, the system comprising: Subsurface flow interception structure, water diversion control structure, filtration structure layer, and control terminal; The river channel is divided into bedrock and undisturbed soil layers from bottom to top; The intercepting subsurface flow structure includes an upper impermeable wall and a lower impermeable wall set vertically within the undisturbed soil layer to divide the river channel into the upstream and downstream sections. The filter structure layer is disposed on the upstream side of the river channel and is located above the original soil layer; The water diversion control structure includes an underground corridor, water distribution pipes, solenoid valves, and flow meters. The underground corridor is located between the upper and lower impermeable walls. Multiple water distribution pipes are arranged in the underground corridor along the width of both banks of the river. The inlet end of each water distribution pipe extends through one side of the underground corridor into the filter structure layer upstream of the river, and the outlet end extends through the other side of the underground corridor into the undisturbed soil layer downstream of the river. Each water distribution pipe is equipped with a solenoid valve and a flow meter. The control terminal is used to collect the flow data detected by the flow meter and adjust the opening of the solenoid valve according to the flow data to regulate the water flow of the water distribution pipe. The adjustment method is characterized by comprising: S1. When the solenoid valve in the water diversion control structure is in the closed state, the water diversion volume V and the groundwater level E on both banks of the downstream river are continuously collected over a long sequence to calculate the data set V of the water diversion volume V changing over time. i (i=1,2,3……365), and a dataset E showing the time-varying groundwater levels on both banks of the downstream river channel, in units of boreholes. i (i=1,2,3……365), E0 is the original groundwater level; S2. Based on the total water diversion dataset TV i (i=1,2,3……365), and a dataset dtE showing the time-varying changes in groundwater levels on both banks of the downstream river channel. i (i=1,2,3……365), calculate the estimated value dtE of the groundwater level change caused by the total water diversion TV; dtE=b0+b1*TV; Formula 1 Where TV is the total water conduction, b0 is the predicted intercept of the regression equation, and b1 is the predicted slope of the regression equation; Where: b1= ; Formula 2 b0= Formula 3 Where i = 1, 2, 3……365, n = 365; S4. Calculate the total water diversion volume based on the design requirements for groundwater level fluctuations; Total water conduction TV = (dtE - b0) / b1; S5. Calculate the average water conductance Vq based on the total water conductance TV, and store the threshold value of the average water conductance Vq in the database. S6. The flow data of the water distribution pipeline is collected in real time by the flow meter and uploaded to the control terminal. The control terminal compares the flow data with the average water flow rate Vq threshold. If the flow data is lower than the average water flow rate Vq, the control terminal controls the opening of the solenoid valve to increase so that the flow data is within the range of the average water flow rate Vq. If the flow rate data is higher than the average flow rate Vq threshold, the control terminal controls the opening of the solenoid valve to decrease, so that the flow rate data is within the range of the average flow rate Vq.

2. The adjustment method according to claim 1, characterized in that, The upper and lower cutoff walls are arranged opposite each other, and the bottom of the lower cutoff wall extends into the bedrock.

3. The adjustment method according to claim 1, characterized in that, The filter structure layer includes a layer of boulders, a layer of pebbles, and a layer of sand and gravel laid sequentially from the outside to the inside.

4. The adjustment method according to claim 3, characterized in that, The particle size of the stone slab layer is 20-30cm, and the laying thickness is 0.5-1.0m; The pebble layer has a particle size of 5-8 cm and a thickness of 1.0-1.2 m; The pebble layer has a particle size of less than 2 cm and a thickness of 1.2-1.5 m.

5. The adjustment method according to claim 1, characterized in that, The underground corridor is a concrete box-shaped structure. The top slab of the underground corridor is connected to the upper anti-seepage wall by pre-embedded steel bars, and the bottom slab of the underground corridor is connected to the lower anti-seepage wall by pre-embedded steel bars. The side panels of the underground corridor are pre-drilled with holes for installing water distribution pipes, and rubber rings are used to seal the holes and water distribution pipes to prevent water leakage.

6. The adjustment method according to claim 5, characterized in that, The water distribution pipe is connected to a branch pipe, and the branch pipe is equipped with a sand discharge valve. The bottom of the underground corridor is provided with a drainage ditch to collect the sand, stones and water discharged by the sand discharge valve.

7. The adjustment method according to claim 6, characterized in that, The water inlet end of the water distribution pipe is equipped with a filter screen.

8. The adjustment method according to claim 1, characterized in that, The water diversion control structure also includes a maintenance well, which serves as a maintenance channel and an automatic control wiring channel. It is located downstream of the intercepting subsurface flow structure near the bank. The wellhead of the maintenance well is higher than the downstream riverbed to prevent surface streams from flowing in.

9. The adjustment method according to claim 1, characterized in that, In step S2, TV i = ; dtE i =E i -E0(i=1,2,3……365).

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