Simulation device and simulation method for water flow and sedimentation process in arid river channels

Abstract

The present invention discloses a device and method for simulating the water flow and sedimentation process in a river channel in an arid area. The simulation device comprises an experimental water flume, a river channel simulation component, a first water tank, and a second water tank. At least one drainage outlet is provided at the downstream end of the experimental water flume. The river channel simulation component is arranged in the experimental water flume, and comprises a first simulation layer and a second simulation layer stacked in sequence in an up-down direction. The first simulation layer is paved with finely crushed walnut shells and has a channel with a water inlet near the upstream end and a water outlet near the downstream end. The second simulation layer is paved with gravel. The first water tank is filled with water and is connected to the water inlet of the channel through an inlet pipe. Part of the water flowing into the channel flows to the downstream end, and the other part seeps into the second simulation layer. The second water tank is connected to the drainage outlet of the experimental water flume through the outlet pipe. In this way, the process of the width and depth of a river channel in an arid area decreasing as it moves downstream can be simulated.

Description

Technical Field

[0001] The present invention relates to the technical field of river simulation in arid areas, and in particular to a device and method for simulating water flow and sedimentation processes in a river in arid areas. Background Art

[0002] In humid regions, the influx of tributaries and groundwater seepage typically lead to increased flow and widening of river channels. In contrast, in arid environments, limited precipitation and intense evaporation and infiltration cause a dramatic decrease in the volume of water in rivers, leading to a gradual decrease in width and depth. However, current flume experimental devices are lacking to simulate this gradual decrease in river channel width and depth in arid regions. Summary of the Invention

[0003] The main purpose of the present invention is to provide a device and method for simulating the water flow and sedimentation process of an arid river channel, which can simulate and construct an arid river channel.

[0004] To achieve the above-mentioned purpose, the present invention proposes a device for simulating the water flow and sedimentation process in arid river channels, comprising:

[0005] The experimental water tank has an upstream end and a downstream end in its length direction, and the downstream end is provided with at least one drainage outlet;

[0006] A river simulation assembly is provided in the experimental water flume, comprising a first simulation layer and a second simulation layer stacked in sequence in an up-and-down direction, wherein the first simulation layer is paved with finely crushed walnut shells and has a channel with an upward notch, the channel extending along the length of the experimental water flume and having a water inlet near the upstream end and a water outlet near the downstream end; and the second simulation layer is paved with gravel;

[0007] a first water tank containing water and connected to the water inlet of the channel through a water inlet pipe, so that part of the water flowing into the channel through the water inlet flows to the downstream end and the other part seeps down to the second simulation layer; and

[0008] The second water tank is connected to the drain outlet of the experimental water tank through a water outlet pipe and is used to accommodate water flowing out through the drain outlet.

[0009] Optionally, the second water tank is connected to the first water tank via a circulating water pipe.

[0010] Optionally, there are multiple drain outlets, and the multiple drain outlets are spaced apart along the width direction of the experimental water tank;

[0011] Correspondingly, the water outlet pipes are provided in plurality, the second water tank is provided with a plurality of water inlets, and the plurality of water inlets and the plurality of drain outlets are connected one-to-one through the plurality of water outlet pipes.

[0012] Optionally, the device for simulating water flow and sedimentation in arid river channels further comprises:

[0013] A water level sensor is provided in the experimental water tank and is used to detect the water level of the experimental water tank;

[0014] a plurality of first valves, arranged in one-to-one correspondence with the plurality of water outlet pipes; and,

[0015] The first controller is electrically connected to the water level sensor and the first valve to control the opening and closing of the first valve according to the detection result of the water level sensor.

[0016] Optionally, the device for simulating the water flow deposition process in arid river channels further includes a sediment feeder, and the discharge port of the sediment feeder is arranged corresponding to the water inlet, so as to input sediment into the channel through the water inlet.

[0017] Optionally, the device for simulating water flow and sedimentation in arid river channels further comprises:

[0018] a gravel filter grid, provided at the water inlet and extending in the up-down direction, comprising a wire mesh and a plurality of gravels filled in the wire mesh;

[0019] A funnel is inserted into the upper end of the gravel filter grid, and the water inlet pipe is inserted into the upper end of the funnel; and

[0020] A feeding pipe has one end connected to the upper end of the funnel and the other end connected to the discharge port of the sediment feeder.

[0021] Optionally, the arid region river channel water flow deposition process simulation device further comprises a stopper, the stopper abutting against a side of the river channel simulation component close to the upstream end, a portion of the stopper corresponding to the channel being recessed with a supply groove in a direction toward the upstream end, the supply groove being in communication with the channel;

[0022] The gravel filter grid is inserted into the supply trough.

[0023] Optionally, the device for simulating the water flow and sedimentation process in arid river channels further comprises a water flow control component, wherein the water flow control component comprises:

[0024] A flow meter, provided in the water inlet pipe, for monitoring water flow;

[0025] a peristaltic pump, disposed in the first water tank and connected to the water inlet pipe;

[0026] A second valve is provided on the water inlet pipe; and

[0027] The second controller is electrically connected to the flow meter, the peristaltic pump and the second valve, and is used to control the opening and closing of the valve and the working state of the peristaltic pump according to the monitoring result of the flow meter.

[0028] Optionally, the device for simulating the water flow and sedimentation process in arid river channels further comprises at least one slope plate, which is abutted against a side of the river channel simulation component close to the downstream end, and the upper surface of the slope plate is lower than the upper surface of the first simulation layer.

[0029] The present invention also provides a method for simulating the water flow and sedimentation process in arid river channels, which is applicable to a device for simulating the water flow and sedimentation process in arid river channels. The method for simulating the water flow and sedimentation process in arid river channels comprises the following steps:

[0030] Step S1: driving the water in the first water tank to flow into the experimental water tank through the channel of the first simulation layer until the water level of the experimental water tank is level with the bottom wall of the channel;

[0031] Step S2: driving the water in the first water tank to flow into the channel at a certain water flow rate, wherein a portion of the water flowing into the channel flows toward the downstream end of the experimental water tank, and the other portion infiltrates into the second simulation layer;

[0032] Step S3: When the water flowing through the channel to the downstream end gradually decreases until there is no water at the downstream end, the water output of the water inlet pipe is increased and kept constant, and the river channel evolution and sedimentation characteristics are observed.

[0033] In the technical solution of the present invention, a second simulation layer paved with gravel is provided, so that a part of the water flowing through the trough of the first simulation layer will seep downward. When the water inlet volume of the water inlet pipe is constant, the amount of water flowing to the downstream end will decrease along the way. In this way, the process of gradually decreasing river water flow under a drought environment due to water evaporation and riverbed infiltration can be quickly and accurately simulated under laboratory conditions, that is, the formation process of the river channel in arid areas decreasing in width and depth along the downstream direction is simulated; and a first simulation layer paved with finely crushed walnut shells is provided, which can be used as upstream sediment input to simulate the process under natural conditions where upstream erosion of the river channel provides sediment for downstream river channel deposition, so that experimenters can observe the evolution and sedimentation characteristics of the river channel in arid areas; the simulation process performed by the arid area river channel water flow deposition process simulation device provided by the present invention is intuitive and realistic. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 A schematic structural diagram of an embodiment of a device for simulating the flow and sedimentation process in a river channel in arid areas provided by the present invention;

[0036] Figure 2 for Figure 1 Schematic diagram of the structure of the mid-river simulation component;

[0037] Figure 3 This is a flow chart of the method for simulating the water flow and sedimentation process in arid river channels provided by the present invention.

[0038] Description of Figure Numbers:

[0039]

[0040] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] In humid regions, the influx of tributaries and groundwater seepage typically lead to increased flow and widening of river channels. In contrast, in arid environments, limited precipitation and intense evaporation and infiltration cause a dramatic decrease in the volume of water in rivers, leading to a gradual decrease in width and depth. However, current flume experimental devices are lacking to simulate this gradual decrease in river channel width and depth in arid regions.

[0045] In view of this, the present invention provides a device 100 for simulating the water flow and sedimentation process in arid river channels. Figure 1 and Figure 2 This is an embodiment of a device 100 for simulating water flow and sedimentation processes in arid river channels provided by the present invention.

[0046] See also Figure 1 and Figure 2 The arid river channel water flow sedimentation process simulation device 100 includes an experimental water tank 1, a river channel simulation component 2, a first water tank 3 and a second water tank 4. The experimental water tank 1 has an upstream end 11 and a downstream end 12 in its length direction, and the downstream end 12 is provided with at least one drainage outlet; the river channel simulation component 2 is arranged in the experimental water tank 1, and includes a first simulation layer 21 and a second simulation layer 22 stacked in sequence along the up and down directions, the first simulation layer 21 is paved with finely crushed walnut shells, and is provided with a groove 211 with a notch facing upwards, and the groove 211 is along the experimental water tank 1. The water tank 1 is extended in the longitudinal direction and has a water inlet near the upstream end 11 and a water outlet near the downstream end 12. The second simulation layer 22 is paved with gravel; the first water tank 3 is filled with water and is connected to the water inlet of the channel 211 through the water inlet pipe 31, so that part of the water flowing into the channel 211 through the water inlet flows to the downstream end 12, and the other part seeps into the second simulation layer 22; the second water tank 4 is connected to the drain outlet of the experimental water tank 1 through the outlet pipe 42, and is used to accommodate water flowing out through the drain outlet.

[0047] In the technical solution of the present invention, a second simulation layer 22 made of gravel is provided, so that a portion of the water flowing through the channel 211 of the first simulation layer 21 will seep downward. When the water inlet volume of the water inlet pipe is constant, the amount of water flowing to the downstream end will decrease along the way. In this way, the process of gradually decreasing river water under strong evaporation and riverbed infiltration in a drought environment can be quickly and accurately simulated under laboratory conditions, thereby simulating the formation process of the width and depth of the river channel in the drought area decreasing downstream. A first simulation layer 21 made of finely crushed walnut shells is also provided, which can be used as upstream sediment input to simulate the process under natural conditions where upstream erosion of the river channel provides sediment for downstream river channel deposition, so that experimenters can observe the evolution of the river channel and sedimentary characteristics. The simulation process performed by the drought river channel water flow deposition process simulation device 100 provided by the present invention is intuitive and realistic.

[0048] It should be noted that, in one embodiment of the present invention, the upper surface of the second water tank 4 is lower than the notch end of the experimental water tank 1 , so that the water in the experimental water tank 1 can automatically flow into the second water tank 4 through the outlet pipe 42 .

[0049] It should also be noted that, in one embodiment of the present invention, the groove 211 is formed by pressing the first simulation layer 21 downward with a steel pipe. Specifically, the groove 211 can be formed by placing the steel pipe on the first simulation layer 21, pressing it downward to a certain depth, and then pulling it out.

[0050] Further, see Figure 1 The second water tank 4 is connected to the first water tank 3 through a circulating water pipe 6. In this way, the water in the second water tank 4 can flow back to the first water tank 3 for reuse, thereby realizing the recycling of water.

[0051] Furthermore, a water pump is provided in the first water tank 3 , and the water pump is connected to the circulating water pipe 6 to pump the water in the second water tank 4 into the first water tank 3 .

[0052] For details, please refer to Figure 1 There are multiple drain outlets, and the multiple drain outlets are spaced apart along the width of the experimental water tank 1. Correspondingly, there are multiple outlet pipes 42, and the second water tank 4 has multiple water inlets. The multiple water inlets and the multiple drain outlets are connected one-to-one via the multiple outlet pipes 42. Furthermore, the multiple drain outlets are evenly spaced apart along the width of the experimental water tank 1. This ensures uniform drainage of the experimental water tank 1 and prevents water from flowing in the same direction, which would affect the permeability uniformity and morphology of the second simulation layer 22.

[0053] Further, see Figure 1The arid region river flow and sedimentation process simulation device 100 further includes a water level sensor 7, a plurality of first valves, and a first controller. The water level sensor 7 is provided in the experimental water tank 1 to detect the water level of the experimental water tank 1; the plurality of first valves are provided in a one-to-one correspondence with the plurality of outlet pipes 42; and the first controller is electrically connected to the water level sensor 7 and the first valves to control the opening and closing of the first valves based on the detection results of the water level sensor 7. In this way, the water level of the experimental water tank 1 can be controlled according to specific needs.

[0054] Specifically, the amount of upstream sediment input through the first simulation layer is limited, so please refer to Figure 1 The arid region river flow deposition process simulation device 100 further includes a sediment feeder 5, the discharge port of which is arranged corresponding to the water inlet, so as to input sediment into the channel 211 through the water inlet. In this manner, upstream sediment can be input through the sediment feeder 5, and the sediment input amount and input rate can be controlled. This allows simulation of different sediment input conditions based on specific needs, thereby improving the practicality of the arid region river flow deposition process simulation device 100.

[0055] Further, see Figure 1 The arid river channel water flow sedimentation process simulation device 100 further includes a gravel filter grid 8, a funnel 9, and a feed pipe 10. The gravel filter grid 8 is located at the water inlet, extending vertically and comprising a wire mesh and a plurality of gravels filled within the mesh. The funnel 9 is inserted into the upper end of the gravel filter grid 8, and the water inlet pipe 31 is inserted into the upper end of the funnel 9. One end of the feed pipe 10 is connected to the upper end of the funnel 9, and the other end is connected to the discharge port of the sediment feeder 5. Thus, by providing the gravel filter grid 8, the mechanical differentiation of sediment particles under natural conditions can be simulated while reducing the impact of water flow and sediment.

[0056] It should be noted that, in one embodiment of the present invention, the funnel 9 is a pointed funnel to ensure that the sediment leaks at a constant rate.

[0057] For details, please refer to Figure 1 The arid region river flow and sedimentation process simulation device 100 further includes a stopper 1A abutting against a side of the river simulation assembly 2 near the upstream end 11. A supply groove 1A1 is recessed in the portion of the stopper 1A corresponding to the channel 211, extending toward the upstream end 11. The supply groove 1A1 communicates with the channel 211. The gravel filter grid 8 is inserted into the supply groove 1A1. Furthermore, the upper end surface of the gravel filter grid 8 is no higher than the upper end surface of the stopper 1A, preventing water flowing out of the funnel 9 from flowing through the sidewalls of the gravel filter grid 8 and out of the stopper 1A.

[0058] For details, please refer to Figure 1 The device 100 for simulating the flow and sedimentation process in arid river channels further includes a water flow control component, which includes a flow meter, a peristaltic pump, a second valve, and a second controller. The flow meter is located in the water inlet pipe 31 and is used to monitor the water flow; the peristaltic pump is located in the first water tank 3 and is connected to the water inlet pipe 31; the second valve is located in the water inlet pipe 31; and the second controller is electrically connected to the flow meter, the peristaltic pump, and the second valve, and is used to control the opening and closing of the valve and the operating state of the peristaltic pump based on the monitoring results of the flow meter. In this way, the water flow in the water inlet pipe 31 can be adjusted in real time to achieve a constant water supply rate, simulating various upstream water flow conditions, and thus observing the flow and sedimentation process in arid river channels under different upstream water flow conditions.

[0059] For details, please refer to Figure 1 The arid river flow sedimentation process simulation device 100 further includes at least one slope plate 1B, which abuts against the side of the river simulation component 2 near the downstream end 12. The upper surface of the slope plate 1B is lower than the upper surface of the first simulation layer 21. This is used to simulate changes in river channel slope and improve the accuracy of experimental results.

[0060] Specifically, in one embodiment of the present invention, the experimental water tank 1 is enclosed by transparent glass.

[0061] Specifically, in one embodiment of the present invention, the sediment feeder 5 is a spiral sediment feeder 5 .

[0062] The present invention also provides a method for simulating the water flow and sedimentation process in arid river channels, which is applicable to the device for simulating the water flow and sedimentation process in arid river channels described above.

[0063] See also Figure 3 The method for simulating the water flow and sedimentation process in arid river channels comprises the following steps:

[0064] Step S1: driving the water in the first water tank to flow into the experimental water tank through the channel of the first simulation layer until the water level of the experimental water tank is level with the bottom wall of the channel.

[0065] Specifically, in this step, the second valve is controlled to open by the second controller, and the peristaltic pump is started to allow the water in the first water tank to flow into the channel. The water level of the experimental water tank is level with the bottom wall of the channel, simulating the initial state of the river channel in arid areas.

[0066] Step S2: driving the water in the first water tank to flow into the channel at a certain water flow rate, wherein a portion of the water flowing into the channel flows to the downstream end of the experimental water tank, and the other portion seeps down to the second simulation layer.

[0067] Specifically, in this step, the second controller controls the peristaltic pump's pumping rate based on the flowmeter's monitoring results, thereby controlling the amount of water entering the channel. Part of the channel's water flows to the downstream end, while the remaining part seeps down into the second simulation layer. Consequently, the amount of water flowing to the downstream end also decreases, simulating water evaporation and infiltration into the riverbed in a drought. Furthermore, the first controller adjusts the opening and closing of the plurality of first valves based on the water level sensor, gradually reducing the amount of water flowing to the downstream end until no water is present, simulating the process by which a river channel in a drought-stricken area decreases in width and depth as it progresses downstream.

[0068] Step S3: When the water flowing through the channel to the downstream end gradually decreases until there is no water at the downstream end, the water output of the water inlet pipe is increased and kept constant, and the river channel evolution and sedimentation characteristics are observed.

[0069] In this step, by controlling the water outflow of the water inlet pipe, the water flow and sedimentation process of the drought-stricken river channel under different upstream water inflow conditions can be simulated, thereby observing the river channel evolution and sedimentation characteristics under different upstream water flow conditions.

[0070] It should be noted that in the above steps, some of the finely chopped walnut shells in the first simulated layer will flow toward the downstream end under the influence of the water flow, acting as upstream sediment input, simulating the process under natural conditions where upstream erosion of the river channel provides sediment for downstream channel deposition. Furthermore, the sediment feeder can be driven to input sediment into the channel through the water inlet, and the sediment input amount and input rate can be controlled by the sediment feeder.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A device for simulating the flow and sedimentation process of a river in an arid area, characterized in that: The device for simulating the water flow and sedimentation process in arid river channels comprises: The experimental water tank has an upstream end and a downstream end in its length direction, and the downstream end is provided with at least one drainage outlet; A river simulation assembly is provided in the experimental water flume, comprising a first simulation layer and a second simulation layer stacked in sequence in an up-and-down direction, wherein the first simulation layer is paved with finely crushed walnut shells and has a channel with an upward notch, the channel extending along the length of the experimental water flume and having a water inlet near the upstream end and a water outlet near the downstream end; and the second simulation layer is paved with gravel; a first water tank containing water and connected to the water inlet of the channel through a water inlet pipe, so that part of the water flowing into the channel through the water inlet flows to the downstream end and the other part seeps down to the second simulation layer; and The second water tank is connected to the drain outlet of the experimental water tank through a water outlet pipe and is used to accommodate water flowing out through the drain outlet.

2. The device for simulating the water flow and sedimentation process in arid river channels according to claim 1, characterized in that: The second water tank is connected to the first water tank through a circulating water pipe.

3. The device for simulating water flow and sedimentation in arid river as claimed in claim 1, characterized in that: There are multiple drain outlets, and the multiple drain outlets are spaced apart along the width direction of the experimental water tank; Correspondingly, the water outlet pipes are provided in plurality, the second water tank is provided with a plurality of water inlets, and the plurality of water inlets and the plurality of drain outlets are connected one-to-one through the plurality of water outlet pipes.

4. The device for simulating water flow and sedimentation in arid river channels according to claim 3, wherein: The device for simulating the water flow and sedimentation process in arid river channels further comprises: A water level sensor is provided in the experimental water tank and is used to detect the water level of the experimental water tank; a plurality of first valves, arranged in one-to-one correspondence with the plurality of water outlet pipes; and, The first controller is electrically connected to the water level sensor and the first valve to control the opening and closing of the first valve according to the detection result of the water level sensor.

5. The device for simulating water flow and sedimentation in arid river channels according to claim 1, wherein: The device for simulating the water flow and sedimentation process in arid river channels further comprises a sediment feeder, wherein the discharge port of the sediment feeder is arranged corresponding to the water inlet so as to input sediment into the channel through the water inlet.

6. The device for simulating the flow and sedimentation process of a river in an arid region according to claim 5, characterized in that: The device for simulating the water flow and sedimentation process in arid river channels further comprises: a gravel filter grid, provided at the water inlet and extending in the up-down direction, comprising a wire mesh and a plurality of gravels filled in the wire mesh; A funnel is inserted into the upper end of the gravel filter grid, and the water inlet pipe is inserted into the upper end of the funnel; and A feeding pipe has one end connected to the upper end of the funnel and the other end connected to the discharge port of the sediment feeder.

7. The device for simulating the flow and sedimentation process of a river in an arid region according to claim 6, characterized in that: The device for simulating the flow and sedimentation process in arid river channels further includes a stopper, the stopper abutting against a side of the river channel simulation component close to the upstream end, and a supply groove is recessed in a portion of the stopper corresponding to the channel and extending toward the upstream end, the supply groove being in communication with the channel; The gravel filter grid is inserted into the supply trough.

8. The device for simulating water flow and sedimentation in arid river channels according to claim 1, wherein: The device for simulating the water flow and sedimentation process in arid river channels further comprises a water flow control component, wherein the water flow control component comprises: A flow meter, provided in the water inlet pipe, for monitoring water flow; a peristaltic pump, disposed in the first water tank and connected to the water inlet pipe; A second valve is provided on the water inlet pipe; and The second controller is electrically connected to the flow meter, the peristaltic pump and the second valve, and is used to control the opening and closing of the valve and the working state of the peristaltic pump according to the monitoring result of the flow meter.

9. The device for simulating water flow and sedimentation in arid river channels according to claim 1, wherein: The device for simulating the water flow and sedimentation process in arid river channels further comprises at least one slope plate, which abuts against a side of the river channel simulation component close to the downstream end, and the upper surface of the slope plate is lower than the upper surface of the first simulation layer.

10. A method for simulating the water flow and sedimentation process in arid river channels, applicable to the device for simulating the water flow and sedimentation process in arid river channels as claimed in any one of claims 1 to 9, characterized in that: The method for simulating the water flow and sedimentation process in arid river channels comprises the following steps: Step S1: driving the water in the first water tank to flow into the experimental water tank through the channel of the first simulation layer until the water level of the experimental water tank is level with the bottom wall of the channel; Step S2: driving the water in the first water tank to flow into the channel at a certain water flow rate, wherein a portion of the water flowing into the channel flows toward the downstream end of the experimental water tank, and the other portion infiltrates into the second simulation layer; Step S3: When the water flowing through the channel to the downstream end gradually decreases until there is no water at the downstream end, the water output of the water inlet pipe is increased and kept constant, and the river channel evolution and sedimentation characteristics are observed.

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