A simulation device for the impact of river ecological water replenishment on groundwater

Abstract

The present invention relates to a simulation device for the influence of river ecological water replenishment on groundwater, comprising a sand box model, a river simulation module, a water inlet module and a water outlet confluence module. The sand box model is separated into a sand filling area, a first water tank area and a second water tank area by two permeable partitions. The first water tank area and the second water tank area are respectively located on both sides of the sand filling area. The sand filling area is filled with quartz sand. The river simulation module is inserted into the quartz sand at the top of the sand filling area. The position of the river simulation module adjacent to the first water tank area forms an infiltration area connected to the sand filling area. The position of the river simulation module adjacent to the second water tank area is provided with a water outlet; the water inlet module is respectively connected to the first water tank area and the infiltration area of ​​the river simulation module, and the water outlet confluence module is respectively connected to the bottom of the second water tank area and the water outlet of the river simulation module. The present invention is a simulation device for the influence of river ecological water replenishment on groundwater, which is mainly used for understanding the migration of river infiltration water flow in the unsaturated zone-saturated zone during the ecological water replenishment process.

Description

Technical Field

[0001] The invention relates to the field of water resources research, and in particular to a device for simulating the impact of river ecological water replenishment on groundwater. Background Art

[0002] With the growth of social economy, unreasonable water resource utilization patterns have caused prominent problems in some areas, such as river channel interruption, shrinkage and drying of rivers and lakes, insufficient ecological flow guarantee, damaged water shorelines, falling groundwater levels, and serious soil erosion. In order to further promote high-quality development of water conservancy in the new stage, meet the people's growing needs for a better life, improve the quality and stability of water ecosystems, maintain the health and vitality of rivers and lakes, realize the sustainable use of river and lake functions, and achieve harmonious coexistence between people and water, reviving the ecological environment of rivers and lakes has become a new practice in the construction of ecological civilization.

[0003] At present, river ecological water replenishment, as an important means to revive the ecological environment of rivers and lakes, has been implemented in many places. In 2021, the water consumption of artificial ecological water replenishment accounted for 5.4% of the total water consumption in the country, and even in some areas it has become the main form of water use. Therefore, studying the impact of ecological water replenishment on the surrounding areas of river banks and clarifying the changes in infiltration rate during river water replenishment are of great significance for successfully completing the ecological water replenishment task and promoting the goal of ecological environment recovery of rivers and lakes. Summary of the invention

[0004] In order to solve one or more of the above-mentioned technical problems, the present invention provides a simulation device for the impact of river ecological water replenishment on groundwater to form a physical simulation solution.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a simulation device for the impact of river ecological water replenishment on groundwater, comprising a sand box model, a river simulation module, an inlet module and an outlet collection module, wherein the sand box model is separated into a sand filling area, a first water tank area and a second water tank area by two permeable partitions, the first water tank area and the second water tank area are respectively located on both sides of the sand filling area, the sand filling area is filled with quartz sand, the river simulation module is inserted into the quartz sand at the top of the sand filling area, the position of the river simulation module adjacent to the first water tank area forms an infiltration area connected to the sand filling area, and the position of the river simulation module adjacent to the second water tank area is provided with an outlet; the inlet module is respectively connected to the first water tank area and the infiltration area of ​​the river simulation module, and the outlet collection module is respectively connected to the bottom of the second water tank area and the outlet of the river simulation module.

[0006] The beneficial effects of the present invention are as follows: the simulation device for the impact of river ecological water replenishment on groundwater is mainly used to understand the migration of river infiltration water flow in the unsaturated zone-saturated zone during the ecological water replenishment process, and further clarifies the discharge volume of injected water along the river and groundwater pathways under different scenarios of vadose zone thickness, vadose zone properties, and surface water-groundwater head difference, and analyzes the potential changes in the river to groundwater recharge rate.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the river simulation module adopts a rectangular structure with an open top, the front and rear side walls and the bottom wall of the river simulation module are all permeable surfaces, the left and right side walls of the river simulation module are both water-proof surfaces with openings, and the left and right side walls of the river simulation module are respectively arranged adjacent to the second water tank area and the first water tank area.

[0009] Furthermore, an anti-seepage plate is inserted on the bottom wall of the river simulation module, and the anti-seepage plate can move left and right along the bottom wall of the river simulation module and adjust the left and right width of the infiltration area.

[0010] The beneficial effect of adopting the above further solution is that by setting the anti-seepage plate, the left and right widths of the infiltration area can be adjusted, that is, the width of the simulated river can be adjusted.

[0011] Furthermore, each edge of the rectangular river simulation module is made of stainless steel, and two horizontal edges arranged front and back on the bottom wall of the river simulation module are respectively provided with first slots extending left and right, and the anti-seepage plate is inserted into the first slots.

[0012] The beneficial effect of adopting the above further solution is that the edges of the river simulation module are made of stainless steel material, making the structure of the river simulation module more stable. The width of the river can be adjusted by moving the anti-seepage plate in the first slot.

[0013] Furthermore, two vertical edges arranged front and back on the left and right side walls of the river simulation module are respectively provided with vertically extending second slots, and baffles are inserted in the second slots; the front and back side walls of the river simulation module are made of gauze.

[0014] The beneficial effect of adopting the above further solution is that the second slot is provided to facilitate the detachable connection of the water barrier. Water can enter the river simulation module through the small holes of the gauze, while quartz sand particles cannot pass through the gauze.

[0015] Furthermore, a plurality of vertically arranged water outlets are provided on the baffle plate near the second water tank area, and a water stop valve is provided at each water outlet.

[0016] The beneficial effects of adopting the above further scheme are: when the water stop valve is tightened, the water outlet can be completely blocked; when the front and rear side walls and the bottom wall of the river simulation module are sealed, the depth of water accumulation in the river simulation module can be controlled by the height of different water outlets.

[0017] Furthermore, a first glass tube with adjustable height is provided in the first water tank area, the first glass tube is arranged vertically and the lower end passes through the bottom of the first water tank area, the upper end of the first glass tube is open and the lower end can be sealed; a second glass tube with adjustable height is provided in the second water tank area, the second glass tube is arranged vertically and the lower end passes through the bottom of the second water tank area, the upper end of the second glass tube is open and the lower end is connected to the water outlet confluence module.

[0018] The beneficial effect of adopting the above further scheme is: by setting the first glass tube and the second glass tube, overflow occurs when the water level in the first water tank area and the second water tank area exceeds the top height of the first glass tube and the second glass tube, and the groundwater head difference on both sides of the sand box before the ecological water replenishment simulation is maintained constant. When filling sand, slowly inject clean water into the first water tank area and the second water tank area. When the water level is not lower than the height of the glass tube, no overflow occurs. The water level that rises with the sand filling can fully remove the gas in the gap of the sand body and maintain the homogeneity of the porous medium. After the head difference in the groundwater saturated zone is stable, by blocking the lower end of the first glass tube and stopping the injection of clean water into the first water tank area and the second water tank area, the response of different aeration zone thickness and groundwater hydraulic gradient scenarios to river water replenishment can be observed.

[0019] Furthermore, the water inlet module includes a water tank, a water inlet pipe and a peristaltic pump. One end of the water inlet pipe is connected to the water tank, and the other end is respectively connected to the first water tank area and the infiltration area of ​​the river simulation module. The peristaltic pump is connected to the water inlet pipe.

[0020] Furthermore, the outlet confluence module includes a groundwater remote outlet bucket and a river runoff outlet bucket, the groundwater remote outlet bucket is connected to the bottom of the second water tank area through an outlet pipe, and the river runoff outlet bucket is connected to the outlet of the river simulation module through an outlet pipe.

[0021] Furthermore, it also includes a weighing module, and the water outlet confluence module is arranged on the weighing module; the sand box model is made of transparent material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a simulation device for the impact of river ecological water replenishment on groundwater according to the present invention;

[0023] Figure 2 It is a structural schematic diagram of the river simulation module of the present invention.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1. River simulation module; 11. Infiltration area; 12. Anti-seepage board; 13. Water-blocking board; 14. Gauze; 15. Water outlet;

[0026] 2. Sand filling area; 21. First water tank area; 22. Second water tank area; 23. Water permeable partition; 24. First glass tube; 25. Second glass tube;

[0027] 3. Water tank; 31. Water inlet pipe; 32. Peristaltic pump; 4. Groundwater remote outlet bucket; 41. Outlet pipe; 5. River runoff outlet bucket; 6. Weighing module. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] like Figure 1 and Figure 2 As shown, a simulation device for the impact of river ecological water replenishment on groundwater in this embodiment includes a sand box model, a river simulation module 1, an inlet module and an outlet confluence module. The sand box model is separated into a sand filling area 2, a first water tank area 21 and a second water tank area 22 by two permeable baffles 23. The first water tank area and the second water tank area 22 are respectively located on both sides of the sand filling area. The sand filling area is filled with quartz sand. The river simulation module 1 is inserted into the quartz sand at the top of the sand filling area 2. The position of the river simulation module 1 adjacent to the first water tank area 21 forms an infiltration area 11 connected to the sand filling area 2. The position of the river simulation module 1 adjacent to the second water tank area 22 is provided with an outlet 15; the inlet module is respectively connected to the first water tank area 21 and the infiltration area 11 of the river simulation module 1, and the outlet confluence module is respectively connected to the bottom of the second water tank area 22 and the outlet 15 of the river simulation module 1. The sand box model is mainly used to simulate the infiltration process of the river into the unsaturated zone during the river ecological water replenishment process and the saturated flow migration process after the river infiltration is connected with the original groundwater level.

[0030] like Figure 1 and Figure 2 As shown, the river simulation module 1 of this embodiment adopts a rectangular structure with an open top, the front and rear side walls and the bottom wall of the river simulation module 1 are all permeable surfaces, the left and right side walls of the river simulation module 1 are both water-blocking surfaces with openings, and the left and right side walls of the river simulation module 1 are respectively arranged adjacent to the second water tank area 22 and the first water tank area 21.

[0031] like Figure 1 and Figure 2As shown, an anti-seepage plate 12 is inserted into the bottom wall of the river simulation module 1 of this embodiment, and the anti-seepage plate 12 can move left and right along the bottom wall of the river simulation module 1 and adjust the left and right width of the infiltration area 11. By setting the anti-seepage plate, the left and right width of the infiltration area can be adjusted, that is, the width of the simulated river can be adjusted.

[0032] A preferred solution of this embodiment is that each edge of the rectangular river simulation module 1 is made of stainless steel, and two horizontal edges arranged front and back on the bottom wall of the river simulation module 1 are respectively provided with first slots extending left and right, and the anti-seepage plate 12 is inserted into the first slots. The edges of the river simulation module are made of stainless steel, so that the structure of the river simulation module is more stable. The width of the river can be adjusted by moving the anti-seepage plate in the first slot.

[0033] A further solution of this embodiment is that two vertical edges arranged front and back on the left and right side walls of the river simulation module 1 are respectively provided with second slots extending vertically, and a water blocking plate 13 is inserted into the second slot; the front and back side walls of the river simulation module 1 are made of a gauze 14, such as Figure 2 As shown. The second slot is provided to facilitate the detachable connection of the baffle. Water can flow into the river simulation module through the small holes of the gauze, while quartz sand particles cannot pass through the gauze.

[0034] like Figure 2 As shown, a plurality of vertically arranged water outlets 15 are provided on the water barrier 13 near the second water tank area 22, and a water stop valve is provided at each water outlet 15. When the water stop valve is tightened, the water outlet can completely block the water from flowing out; when the front and rear side walls and the bottom wall of the river simulation module are sealed, the depth of water accumulation in the river simulation module can be controlled by the height of different water outlets. At the same time, the water outlet can be connected to an external water outlet pipe to collect excess water from the runoff into the river runoff water bucket 5 for weighing.

[0035] like Figure 1 As shown, in this embodiment, a height-adjustable first glass tube 24 is provided in the first water tank area 21, the first glass tube 24 is arranged vertically and the lower end passes through the bottom of the first water tank area 21, the upper end of the first glass tube 24 is open and the lower end can be blocked; a height-adjustable second glass tube 25 is provided in the second water tank area 22, the second glass tube 25 is arranged vertically and the lower end passes through the bottom of the second water tank area 22, the upper end of the second glass tube 25 is open and the lower end is connected to the water outlet confluence module. By providing the first glass tube and the second glass tube, overflow occurs when the water level in the first water tank area and the second water tank area exceeds the top height of the first glass tube and the second glass tube to maintain a constant water head water level.

[0036] like Figure 1As shown, a specific scheme of this embodiment is that the water inlet module includes a water tank 3, a water inlet pipe 31 and a peristaltic pump 32, one end of the water inlet pipe 31 is connected to the water tank 3, and the other end is respectively connected to the first water tank area 21 and the infiltration area 11 of the river simulation module 1, and the peristaltic pump 32 is connected to the water inlet pipe 31.

[0037] like Figure 1 As shown, a specific scheme of this embodiment is that the water outlet confluence module includes a groundwater remote outlet bucket 4 and a river runoff outlet bucket 5, the groundwater remote outlet bucket 4 is connected to the bottom of the second water tank area 22 through an outlet pipe 41, and the river runoff outlet bucket 5 is connected to the outlet 15 of the river simulation module 1 through an outlet pipe 41.

[0038] like Figure 1 As shown, a further solution of this embodiment is that it also includes a weighing module 6, and the water outlet confluence module is arranged on the weighing module 6; the weighing module is composed of a water collecting bucket and a precision balance, and the weighing error is controlled within 1g. The sand box model is made of transparent material. A recording module can also be set to record the migration of the wetting front and the corresponding time during the experiment. The recording module is composed of a high-definition camera, a background board and a light adjustment device.

[0039] The experimental conditions used in the simulation device for the impact of river ecological water replenishment on groundwater in this embodiment should be as close to the actual situation as possible to reduce the error between indoor experiments and field practice. Therefore, the production of the sand box model should follow the principles of geometric similarity and similar dynamic conditions as much as possible. Geometric similarity means that the thickness, length, and width of the aquifer in the sand box model and the actual aquifer are in a certain proportion. Similar dynamic conditions mean that the permeability coefficient of the aquifer in the sand box model has a certain proportional relationship with the permeability coefficient of the actual aquifer.

[0040] A specific scheme of this embodiment is that the river simulation module 1 can adopt a rectangular structure with a length, width and height of 50cm, 5cm and 3.5cm respectively. Each edge of the rectangular structure is made of stainless steel, and its front and rear side walls and bottom wall are blocked by 100 mesh gauze. Water can enter the quartz sand in the groundwater simulation module through the small holes of the gauze, while the quartz sand particles cannot pass through the gauze. The main box of the sand box model is 70cm long, 5cm wide and 50cm high. The sand box material is acrylic acid, and the interface is transparent, which is convenient for observing the seepage phenomenon. The sand filling area 2 is in the middle position, and the length, width and height of the sand filling area are 50cm, 5cm and 50cm respectively. The sand filling area is filled with quartz sand with a pore diameter of 1mm after screening. The height of the filled sand body is 30cm, and the river module is inserted at the top (pre-buried 1cm, that is, 1cm is buried in the sand body of the sand filling area). The length, width and height of the water tank area on both sides of the sand filling area are 10cm, 5cm and 50cm respectively. A hollow glass tube with adjustable height is set in it. When the water level exceeds the height of the top of the glass tube, overflow occurs to maintain a constant head water level. Sealing plugs can be added to the bottom and top of the glass tube. When the water replenishment simulation starts, the right side will be completely blocked and no overflow will occur, allowing the water level to rise.

[0041] In the above specific scheme, the specific experimental process of the simulation device is as follows:

[0042] (1) Prepare a sufficient amount of quartz sand with a particle size of 1 mm, wash the sand body with pure water for multiple times to remove impurities and residual salt in the sand body, and measure the relevant parameters of the sand body;

[0043] (2) Fill quartz sand layer by layer. During the sand filling process, open the water tank areas on both sides of the sand filling area to let in water. Control the water flow rate not to exceed the sand filling height. Raise the water level while filling the sand body to fully discharge the bubbles in the sand body to ensure uniform sand filling until the sand layer is filled to the preset height; add a river simulation module on the top, fill the bottom of the river simulation module with 1 cm of sand, insert baffles at the front and back to make it completely closed, and use an anti-seepage board of a specific length for the bottom baffle. The part not covered by the anti-seepage board is the simulated river width.

[0044] (3) After the sand filling is completed, the sand body needs to be fully dried, and the height of the hollow glass tubes in the water tank areas on the left and right sides is adjusted to the preset position. Clean water is slowly injected into the water tank areas on the left and right sides at the same time until the hollow glass tube overflows, so as to form a saturated zone with a stable water head difference in the sand body of the sand filling area.

[0045] (4) Turn on the peristaltic pump corresponding to the river simulation module, and turn on the camera to record the flow process. Stop injecting clean water into the water tank areas on the left and right sides, and start injecting water into the river module. Record the injection speed of the peristaltic pump. Open the outlet of the corresponding scenario to control the water accumulation in the river module not to exceed the predetermined depth. Record the drainage flow of the river module and the drainage flow of the groundwater module once a minute, and observe the migration speed, shape and geometric form of the wetting front in the sand body.

[0046] Additional scenarios and scenario switching:

[0047] (1) The particle size of quartz sand can be switched according to the requirements of the experimental simulation, which will change the hydraulic properties of the sand body such as permeability coefficient and dispersion. It can also be replaced by porous media with different hydraulic properties such as river sand and coral sand. It is used to simulate the influence of different air-filling zone properties. When the wetting front observed by adjusting the light and background plate is not obvious, a dye should be added to the river water for marking. The dye can be selected from eosin dye to avoid the influence of adsorption.

[0048] (2) The scenarios that can be set in the river simulation module include: ① The absence of a bottom anti-seepage plate and a left baffle can be used to simulate the seepage process of a low replenishment flow and a large river width; ② By adjusting the left and right lengths of the bottom anti-seepage plate, the influence of different river widths on the seepage process can be simulated; ③ By adjusting the height of the water outlet hole on the left baffle, the influence of different water depths can be simulated.

[0049] (3) The groundwater module can set different groundwater saturated flow head differences by adjusting the overflow height of the glass tubes in the water tanks on both sides. At the same time, after the end of the experimental process (3), the height of the glass tubes in the water tanks on both sides can be simultaneously raised or lowered, the target water level can be preset, and the time to reach the target water level and generate overflow can be recorded to simulate the impact of different aeration zone thicknesses on the river water replenishment process.

[0050] The simulation device for the impact of river ecological water replenishment on groundwater in this embodiment is mainly used to understand the migration of river infiltration in the unsaturated zone and saturated zone during the ecological water replenishment process. Under different scenarios of vadose zone thickness, vadose zone properties, and groundwater head difference, the discharge volume of injected water along the river and groundwater pathways is further clarified, and the potential changes in the river recharge rate to groundwater are analyzed.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0056] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A simulation device for the impact of river ecological water replenishment on groundwater, characterized in that: It comprises a sand box model, a river simulation module, a water inlet module and a water outlet confluence module. The sand box model is separated into a sand filling area, a first water tank area and a second water tank area by two permeable partitions. The first water tank area and the second water tank area are respectively located on both sides of the sand filling area. The sand filling area is filled with quartz sand. The river simulation module is inserted into the quartz sand at the top of the sand filling area. The position of the river simulation module adjacent to the first water tank area forms an infiltration area connected to the sand filling area. The position of the river simulation module adjacent to the second water tank area is provided with a water outlet. The water inlet module is respectively connected to the first water tank area and the infiltration area of ​​the river simulation module. The water outlet confluence module is respectively connected to the bottom of the second water tank area and the water outlet of the river simulation module. The river simulation module adopts a rectangular parallelepiped structure with an open top, the front and rear side walls and the bottom wall of the river simulation module are all permeable surfaces, the left and right side walls of the river simulation module are both water-blocking surfaces with openings, and the left and right side walls of the river simulation module are respectively arranged adjacent to the second water tank area and the first water tank area; An anti-seepage plate is inserted on the bottom wall of the river simulation module, and the anti-seepage plate can move left and right along the bottom wall of the river simulation module and adjust the left and right width of the infiltration area.

2. The device for simulating the impact of river ecological water replenishment on groundwater according to claim 1, characterized in that: Each edge of the rectangular river simulation module is made of stainless steel. Two horizontal edges arranged front and back on the bottom wall of the river simulation module are respectively provided with first slots extending left and right, and the anti-seepage plate is inserted into the first slots.

3. The device for simulating the impact of river ecological water replenishment on groundwater according to claim 2, characterized in that: Two vertical edges arranged front and back on the left and right side walls of the river simulation module are respectively provided with vertically extending second slots, and baffles are inserted in the second slots; the front and back side walls of the river simulation module are made of gauze.

4. The device for simulating the impact of river ecological water replenishment on groundwater according to claim 3, characterized in that: A plurality of vertically arranged water outlets are provided on the baffle plate close to the second water tank area, and a water stop valve is provided at each water outlet.

5. The device for simulating the impact of river ecological water replenishment on groundwater according to claim 1, characterized in that: A first glass tube with adjustable height is provided in the first water tank area. The first glass tube is arranged vertically and the lower end thereof passes through the bottom of the first water tank area. The upper end of the first glass tube is open and the lower end thereof can be sealed. A second glass tube with adjustable height is provided in the second water tank area. The second glass tube is arranged vertically and the lower end thereof passes through the bottom of the second water tank area. The upper end of the second glass tube is open and the lower end thereof is connected to the water outlet confluence module.

6. The device for simulating the impact of river ecological water replenishment on groundwater according to claim 1, characterized in that: The water inlet module includes a water tank, a water inlet pipe and a peristaltic pump. One end of the water inlet pipe is connected to the water tank, and the other end is respectively connected to the first water tank area and the infiltration area of ​​the river simulation module. The peristaltic pump is connected to the water inlet pipe.

7. The device for simulating the impact of river ecological water replenishment on groundwater according to claim 1, characterized in that: The outlet confluence module includes a groundwater remote outlet bucket and a river runoff outlet bucket. The groundwater remote outlet bucket is connected to the bottom of the second water tank area through an outlet pipe, and the river runoff outlet bucket is connected to the outlet of the river simulation module through an outlet pipe.

8. The device for simulating the impact of river ecological water replenishment on groundwater according to claim 1, characterized in that: It also includes a weighing module, and the water outlet confluence module is arranged on the weighing module; the sand box model is made of transparent material.

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