Shallow riverside groundwater treatment system and method

Abstract

The invention provides a shallow riverside groundwater treatment system and method. The shallow riverside underground water treatment system comprises a water pool with a water inlet area and a water outlet area and a water conservancy adjusting well arranged on the upstream of a polluted aquifer, a permeable layer is arranged in an underground soil layer, a plurality of water inlet holes are formed in the side wall, located on the permeable layer, of the water conservancy adjusting well, and the water pool is located on the downstream side of the water conservancy adjusting well. The pool is located underground, the water conservancy adjusting well is communicated with the water inlet area through a transmission pipe, an effluent weir communicated with the water outlet area is arranged on the outer side of the pool, and the effluent weir is communicated with a downstream river through a water outlet pipe; and a plurality of filler modules are arranged in the water tank. The filler is designed to be of a modular structure, online monitoring equipment is combined, the use performance of the filler module is accurately detected, timely replacement is achieved, the repairing effect is guaranteed, the activity of the filler module is guaranteed, and secondary pollution and blocking are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of underground sewage treatment, and in particular to a shallow riverside groundwater treatment system and method. Background Art

[0002] Permeable reaction wall technology (PRB) is an emerging technology in the risk control engineering control technology of contaminated sites. Compared with other groundwater pollution treatment technologies, PRB has the advantages of low energy consumption, simple management, and long-term treatment of contaminated groundwater. It is a green and sustainable pollution prevention and control technology. PRB is divided into continuous type, funnel-water gate type, injection reaction belt type, etc. according to the implementation method. The funnel-water gate type PRB uses a water barrier wall to control and guide the groundwater flow to converge and then remove pollutants through the PRB filler. It is suitable for treating sites with shallow groundwater burial depth and large pollution plume, but it will disturb the surface and stratum structure, and will have a certain interference with the natural groundwater flow field.

[0003] The existing PRB reactive fillers are of integral structure, which is not conducive to replacement. When pollutants flow through the active filler area with groundwater, the activity of the filler will gradually decrease as the reaction proceeds. The inactivated filler is a potential secondary pollution source for groundwater and will also cause blockage of the reactive filler. The reaction filler blocked by the pollution plume flow makes it difficult to ensure the repair effect.

[0004] For example, the existing patent publication number CN113896273A discloses a permeable reaction wall structure and a method for treating pollution plumes. The structure uses the terrain difference to collect and transport the polluted water to the downstream permeable reaction wall for treatment. The collecting well uses the terrain difference to achieve passive water collection; and uses the terrain difference to make the groundwater infiltrate into the underground stratum. If the stratum has poor permeability, the drainage conditions are unfavorable, which may cause the downstream water level to be higher than the upstream water level, resulting in poor treatment effect. Summary of the invention

[0005] The object of the present invention is to provide a shallow riverside groundwater treatment system and method, in which the filler is modularly designed to achieve long-lasting activity of the filler, easy replacement, high repair efficiency and long-lasting effect.

[0006] The technical solution of the present invention is: a shallow riverside groundwater treatment system, including a pool with an inlet area and an outlet area, and a water regulating well located upstream of a contaminated aquifer, wherein there is a permeable layer in the underground soil layer, and the water regulating well is provided with a plurality of water inlet holes on the side wall of the permeable layer, the pool is located on the downstream side of the water regulating well, and the pool is located underground, the water regulating well is connected with the inlet area through a transmission pipe, and an outlet weir connected with the outlet area is provided on the outside of the pool, and the outlet weir is connected with the downstream river through an outlet pipe; a plurality of filling modules are provided in the pool; water-blocking barriers are provided at the bottom and both sides of the pool, and the water-blocking barriers on both sides are flared to enclose the outside of the water regulating well, and the water-blocking barriers at the bottom and both sides extend vertically downward.

[0007] In the above scheme, the present application uses waterproof barriers set on both sides of the pollution plume and the bottom of the pool to actively collect contaminated groundwater into a collection well; in addition, the function of the hydraulic regulating well of the present application is not only to collect contaminated groundwater, but also to raise the groundwater level. The waterproof barrier intercepts the contaminated groundwater in the shallow permeable layer, so that the water level of the contaminated groundwater is raised and transported to the downstream pool treatment system by gravity for treatment; and the hydraulic conditions of the downstream pool are controllable, and the water in the pool is discharged through the outlet pipe, creating favorable hydraulic conditions for the upstream hydraulic regulating well to raise the groundwater level.

[0008] Preferably, the transmission pipe is connected to a water regulating well at the bottom of the pool; the transmission pipe is buried underground at a depth lower than the contamination depth of the groundwater.

[0009] Preferably, the plurality of filler modules are arranged in a rectangular array in the water pool; or the plurality of filler modules are divided into a plurality of vertical column groups in a direction from upstream to downstream, and a plurality of filler modules are arranged in each vertical column group.

[0010] Preferably, the water inlet area and the water outlet area are both provided with water distribution plates for providing stable hydraulic conditions for the filler module.

[0011] Preferably, the water regulating well is cylindrical, the bottom of the water regulating well extends into the underground impermeable layer, and the top of the water regulating well is located on the ground.

[0012] The present invention also provides a shallow riverside groundwater treatment method, which is carried out using the above-mentioned shallow riverside groundwater treatment system, comprising:

[0013] Step 1: underground sewage enters the water regulating well from the aquifer and the water inlet hole, causing the water level in the water regulating well to rise; a certain water level difference is formed between the water regulating well located upstream and the water pool located downstream. When the sewage in the water regulating well flows from the transmission pipe into the water inlet area at a certain outflow rate, the water level in the water regulating well is lower than the water level of the surrounding groundwater, providing a non-powered drive for the water regulating well;

[0014] Step 2: After the sewage flows evenly in the water inlet area, it flows through the filler module for purification, and the purified water is discharged from the water outlet area to the water outlet weir; the purified water is tested for pollutant concentration at the water outlet weir. If the pollutant concentration exceeds the standard limit, the water in the water outlet weir is returned to the water inlet area; if the pollutant concentration reaches the standard limit, the water in the water outlet weir is discharged from the water outlet pipe;

[0015] Step 3: After the water in the outlet weir flows back to the water inlet area, the sampling tube on each filler module is started, and part of the water in the water inlet area flows from the respective sampling tubes to the online monitoring equipment for detection. If the pollutant concentration of the sewage in a certain sampling tube exceeds the standard limit, the filler module connected to the sampling tube is replaced accordingly;

[0016] Step 4: After the replacement is completed, the remaining water in the water inlet area will flow through the filler module again for purification and testing until the pollutant concentration reaches the standard limit and is discharged.

[0017] Preferably, the water flow rate of the hydraulic regulating well is calculated according to formula (1):

[0018]

[0019] Where: Q—water output of water conservancy regulating well, unit: m 3 / d;

[0020] R—influence radius, unit: m;

[0021] r—radius of the outer layer of the water conservancy regulating well filter, unit: m;

[0022] S—water level drop, unit: m;

[0023] K—permeability coefficient, unit: m / d;

[0024] H—aquifer thickness, unit: m.

[0025] Preferably, the service life of the packing module is calculated based on the residence time of water in the packing module, the water intake and the saturation of the packing module. When the service life of the packing module is close to the theoretical service life, part of the water in the water inlet area is introduced into the sampling tube and sent to the online monitoring equipment for detection, and the other part of the water flows through the packing module for purification and detection.

[0026] Preferably, the water flowing out of the water inlet area passes through a plurality of vertical column groups of filler modules in sequence to achieve step-by-step purification.

[0027] Compared with the related art, the present invention has the following beneficial effects:

[0028] 1. Aiming at the problems of deep burial depth of groundwater, large range of pollution plume, large excavation depth and high installation cost of water gate PRB, a shallow riverside groundwater treatment system and method are proposed. For non-confined groundwater with a burial depth greater than 10 meters and less than 20 meters, a funnel-water gate PRB is used, and a water regulation well is set upstream of the polluted aquifer to collect the polluted groundwater; the water regulation well is designed as a complete well, the bottom of the water regulation well is inserted into the impermeable layer, and impermeable barriers are set on both sides and downstream of the water regulation well. The water pool is located on the upper part of the impermeable barrier and is led to the water pool through a transmission pipe, so that all the polluted groundwater can pass through the packing module; the packing module is a modular structure, which realizes the long-lasting activity of the packing, easy replacement, high repair efficiency and long-lasting effect; the present invention greatly reduces the excavation and installation costs of the site, shortens the cycle, ensures the repair effect and reduces the treatment cost, the whole system is a non-powered system, and the flow collection system makes the PRB pool excavated shallow, the stratum structure disturbance is small, and the interference with the natural groundwater flow field is reduced;

[0029] Second, the present invention reduces the excavation depth of the PRB pool, reduces the excavation cost, has less disturbance to the stratum structure, and reduces the interference with the natural groundwater flow field; in actual repair, as long as the bottom of the water regulation well is ensured to be below the impermeable layer, there is an impermeable barrier around the water regulation well, the transmission pipe depth of the water regulation well is lower than the contaminated depth of the groundwater, and the water flow rate of the water regulation well is greater than the contaminated groundwater flow rate, all the contaminated groundwater can be collected into the well;

[0030] 3. The present invention builds a water pool underground and captures polluted groundwater by gravity flow and water level difference. That is, the water pool is located downstream of the water regulating well and forms a certain water level difference with the upstream water regulating well. When the upstream water regulating well flows out polluted water at a certain water flow rate, the water level in the water regulating well drops. The groundwater in the well at the same location is lower than the groundwater level around the well, thereby providing unpowered driving of the water regulating well. The polluted groundwater continuously flows out of the well, so that the polluted groundwater can be purified, realizing unpowered driving and reducing system processing and operation costs.

[0031] 4. The packing module is combined with online monitoring equipment to accurately detect the performance of the packing module and realize timely replacement to ensure the repair effect, ensure the activity of the packing module, and avoid secondary pollution and blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the planar structure of the shallow riverside groundwater treatment system provided by the present invention;

[0033] Figure 2 For along Figure 1 AA section diagram in.

[0034] In the attached figure: 1. hydraulic regulating well; 2. transmission pipe; 3. water barrier; 4. water inlet area; 5. pool; 6. water outlet area; 7. water outlet weir; 8. water outlet pipe; 9. filler module; 10. water barrier; 11. permeable layer. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0036] Embodiment 1

[0037] The present invention is mainly used to solve the problem of shallow riverside groundwater treatment. This embodiment targets non-pressurized groundwater with a burial depth greater than 10 meters and less than 20 meters. It adopts a funnel-gate PRB to repair the contaminated groundwater through a collecting system and a modular PRB.

[0038] like Figure 1 , Figure 2 As shown, a shallow riverside groundwater treatment system provided in this embodiment includes a water regulation well 1, a transmission pipe 2, a water barrier 3, an inlet area 4, a pool 5, an outlet area 6, an outlet weir 7, an outlet pipe 8, and a filler module 9. The shallow riverside groundwater treatment system is arranged underground, and there are a permeable layer 11 and an aquiclude 10 underground.

[0039] The water conservancy regulating well 1 is set upstream of the contaminated aquifer. It is a cylindrical well with a water barrier 3 around it. Water barriers 3 are provided at the bottom and both sides of the pool 5. The water barriers 3 on both sides are expanded to enclose the outside of the water conservancy regulating well 1, and the water barriers 3 on the bottom and both sides extend vertically downward. The lower end of the water conservancy regulating well 1 extends into the water barrier 10, and the water conservancy regulating well 1 has multiple water inlet holes (not shown) on the side wall in the permeable layer 11. In this way, contaminated groundwater at a depth can be captured and transported to the pool 5 through the transmission pipe 2.

[0040] The transmission pipe 2 is buried underground at a depth lower than the contamination depth B of the groundwater (e.g. Figure 2 As shown in the figure, the transmission pipe 2 is connected to the water regulating well 1 at the bottom of the pool 5. The water barrier 3 is arranged vertically to prevent the migration and transportation of polluted groundwater to the surrounding environment. It can be a soil-bentonite water barrier, a plain concrete water barrier, a cement curtain grouting wall or a geomembrane wall.

[0041] The water pool 5 is built underground, and a water inlet area 4 is provided on one side of the water pool 5 close to the water regulating well 1, and a water outlet area 6 is provided on the other side. A plurality of water regulating wells 1 are arranged in the length direction of the water pool 5. The water inlet area 4 and the water outlet area 6 are both provided with uniform water distribution plates, which provide stable hydraulic conditions for the plurality of filler modules 9 placed in the water pool 5, so that the contaminated groundwater can flow evenly through the filler modules 9. The filler modules 9 are PRB fillers.

[0042] The plurality of packing modules 9 are arranged in a rectangular array in the water pool 5. Alternatively, the plurality of packing modules 9 are divided into a plurality of vertical column groups in the direction from upstream to downstream, and a plurality of packing modules 9 (such as Figure 1 As shown, there are 3 vertical column groups, each vertical column group has 13 packing modules 9). The actual arrangement of multiple packing modules 9 is related to the convenience of replacement.

[0043] The water pool 5 is located downstream of the water regulating well 1, and forms a certain water level difference with the water level in the upstream water regulating well 1. When the water regulating well flows out a certain amount of polluted water, the water level in the well drops. The groundwater in the well at the same location is lower than the groundwater level around the well, which provides an unpowered drive for the water regulating well. The polluted groundwater continuously flows out of the water regulating well 1 and is transmitted to the water pool 5 through the transmission pipe 2 to be reacted and decontaminated by the filler module 9, so that the polluted groundwater can be purified.

[0044] The water pool 5 is provided with a water outlet weir 7 connected to the water outlet area 6 outside, and the water outlet weir 7 is connected to the downstream river through the water outlet pipe 8. The water outlet weir 7 is provided with an online monitoring device and a water quality detection device, the online monitoring device is used to monitor the activity of the filler module 9, and the water quality detection device is used to detect the concentration of pollutants in the water of the water outlet weir 7.

[0045] Embodiment 2

[0046] The present invention also provides a shallow riverside groundwater treatment method, which is carried out using the above-mentioned shallow riverside groundwater treatment system and comprises the following steps:

[0047] S1, underground sewage enters the water regulating well 1 from the water inlet hole at a first flow rate from the permeable layer 11, causing the water level in the water regulating well 1 to rise; the water regulating well 1 located upstream and the pool 5 located downstream form a certain water level difference, when the sewage in the water regulating well 1 flows from the transmission pipe 2 into the water inlet area 4 at a certain outflow flow rate, the water level in the water regulating well 1 is lower than the water level of the surrounding groundwater, providing a non-powered drive for the water regulating well. The first flow rate is less than the outflow flow rate of the water regulating well 1.

[0048] The water flow rate of the hydraulic regulating well 1 is calculated according to formula (1):

[0049]

[0050] Impact radius R value, its water calculation formula The water level of the hydraulic regulating well must be higher than the water level of the PRB.

[0051] Where: Q—water output of water conservancy regulating well, unit: m 3 / d;

[0052] R—influence radius, unit: m;

[0053] r—radius of the outer layer of the water conservancy regulating well filter, unit: m;

[0054] S—water level drop, unit: m;

[0055] K—permeability coefficient, unit: m / d;

[0056] H—aquifer thickness, unit: m;

[0057] Refer to the appendix of Technical Specifications for Pipeline Wells (GB 50296-2014).

[0058] Step 2: After the sewage flows uniformly in the water inlet area 4, it flows through the filler module 9 for purification, and the purified water is discharged from the water outlet area 6 to the water outlet weir 7. The purified water is tested for pollutant concentration at the water outlet weir 7 by water quality monitoring equipment.

[0059] The water flowing out of the water inlet area 4 is sequentially purified by passing through a plurality of longitudinal groups of filler modules 9 to achieve the purpose of sufficient purification.

[0060] The detection principle of water quality testing equipment is the same as that of online monitoring equipment, which is to realize online detection of heavy metal concentration through anodic stripping voltammetry. The principle is: first, the enrichment process is carried out, and the metal ions in the water sample are reduced to metals enriched on the working electrode at a certain enrichment potential and for a certain period of time. Then, the electrochemical analyzer is used to perform potential scanning at a certain potential scanning rate, and the oxidation dissolution peak current of the metal is recorded. Different peak current values ​​correspond to different metal concentrations. By controlling the enrichment potential of the metal, the metal is first reduced and then oxidized, and the corresponding peak current appears in turn. The determination of different metals is achieved through the different peak current values.

[0061] If the pollutant concentration exceeds the standard limit (the heavy metal concentration in the water reaches 0.5-0.8 times the standard limit), the water quality is unqualified, and the emergency submersible pump (not shown) is started to return the water in the outlet weir 7 to the water inlet area 4. If the pollutant concentration reaches the standard limit, the water quality is qualified, and the water in the outlet weir 7 is discharged from the outlet pipe 8 to the downstream river. The discharge standard is based on the local surface water environment function and protection objectives, and implements the water quality standard of "Surface Water Environmental Quality Standard GB3838-2002".

[0062] Step three, after the water in the outlet weir 7 flows back to the water inlet area 4, start the sampling tube on each filling module 9. A gate is provided in the water inlet area 4. Start the gate to allow part of the water in the water inlet area 4 to flow from the respective sampling tubes to the online monitoring equipment for detection. If the pollutant concentration of the sewage in a certain sampling tube exceeds the standard limit, the filling module 9 connected to the sampling tube is replaced accordingly.

[0063] In practice, one online monitoring device can only detect the sample in one sampling tube at a time. Therefore, a valve can be set on the sampling tube of each packing module 9, and online monitoring of different modules at different times can be achieved by switching the valve. In addition, monitoring can also be performed by column group, such as three column groups corresponding to three online monitoring devices. If unqualified is found, the packing module 9 of the column group is replaced accordingly.

[0064] Step 4: After the replacement is completed, the gate is started again to allow the remaining water in the water inlet area 4 to flow through the filler module 9 again for purification and detection until the pollutant concentration reaches the standard limit and is discharged.

[0065] In addition, the service life of the packing module 9 is calculated based on the residence time of water in the packing module 9, the water intake and the saturation of the packing module 9. When the actual service life of the packing module 9 is shorter than the calculated theoretical service life, the online monitoring device may not be enabled. When the actual service life of the packing module 9 is close to the theoretical service life, the purification process needs to be carried out synchronously as follows: a part of the water in the water inlet area 4 is introduced into the sampling tube and sent to the online monitoring device for detection, and the other part of the water flows through the packing module 9 for purification and detection by the water quality detection equipment. Until the service life of all the packing modules 9 in the pool 5 is shorter than the calculated theoretical service life, the online monitoring device is turned off.

[0066] Embodiment 3

[0067] The site is about 2000m 2 The strata include miscellaneous fill, silty clay, fine sand, round gravel, residual silty clay, and strongly weathered shale. The average permeability coefficient K of the site is 5.30 m / d, and the thickness of the aquifer H is 13.0 m. Since the water level of the water conservancy regulating well 1 must be higher than the water level of the pool 5, the burial depth of the pool 5 is selected to be 4.0 to 5.0 m, so the water level drop S is 4.0 m, the influence radius R is calculated to be 66.4 m, r is taken as 0.2 m, and the water output Q of the water conservancy regulating well 1 is calculated to be 109.8 m 3 / d, by calculating the along-the-line loss of the transmission pipe 2, the head loss of the filler module 9 (the PRB reaction filler is replaceable, and the head loss is calculated based on the clean filter material), the falling head of the outlet weir 7 and the along-the-line loss of the outlet pipe 8, the sum of the four is about 1.0m~1.5m, which can realize the gravity flow of contaminated water, and the purified groundwater can be discharged to the downstream river through pipelines after online monitoring.

[0068] This patent proposes a method and system for treating shallow riverside groundwater. For non-confined groundwater with a burial depth greater than 10 meters and less than 20 meters, a funnel-water gate PRB is used. A water regulating well is set upstream of the contaminated aquifer to collect the contaminated groundwater. The water regulating well is a complete well. The bottom of the water regulating well is an impermeable layer. Impermeable barriers are set on both sides and downstream of the water regulating well. The PRB (filling module) is located on the upper part of the impermeable barrier and is drained to the filling module through a transmission pipe, so that all contaminated groundwater can pass through the PRB and the contaminated groundwater can be purified. The purified groundwater is discharged to the downstream river through a pipeline after online monitoring. The collecting system makes the PRB excavation shallow, the stratum structure disturbance is small, and the interference with the natural groundwater flow field is reduced.

[0069] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A shallow riverside groundwater treatment system, comprising a pool (5) having a water inlet area (4) and a water outlet area (6), wherein there is a permeable layer (11) in the underground soil layer, characterized in that: It also includes a water regulation well (1) located upstream of the polluted aquifer, the water regulation well (1) being located on the side wall of the permeable layer (11) and having a plurality of water inlet holes, the water pool (5) being located on the downstream side of the water regulation well (1), and the water pool (5) being located underground, the water regulation well (1) being connected to the water inlet area (4) via a transmission pipe (2), the outer side of the water pool (5) being provided with a water outlet weir (7) connected to the water outlet area (6), the water outlet weir (7) being connected to the downstream river via a water outlet pipe (8); a plurality of filling modules (9) being provided in the water pool (5); and water barriers (3) being provided at the bottom and both sides of the water pool (5), the water barriers (3) on both sides being expanded to enclose the outside of the water regulation well (1), and the water barriers (3) at the bottom and both sides extending vertically downward.

2. The shallow riverside groundwater treatment system according to claim 1, characterized in that: The transmission pipe (2) is connected to the water regulation well (1) at the bottom of the pool (5); the transmission pipe (2) is buried underground at a depth lower than the contamination depth of the groundwater.

3. The shallow riverside groundwater treatment system according to claim 1, characterized in that: The plurality of filler modules (9) are arranged in a rectangular array in the water pool (5); or the plurality of filler modules (9) are divided into a plurality of vertical column groups in the direction from upstream to downstream, and a plurality of filler modules (9) are arranged in each vertical column group.

4. The shallow riverside groundwater treatment system according to claim 1, characterized in that: The water inlet area (4) and the water outlet area (6) are both provided with water distribution plates for providing stable hydraulic conditions for the filler module (9).

5. The shallow riverside groundwater treatment system according to claim 1, characterized in that: The water conservancy regulating well (1) is cylindrical, the bottom of the water conservancy regulating well (1) extends into the underground impermeable layer (10), and the top of the water conservancy regulating well (1) is located on the ground.

6. A shallow riverside groundwater treatment method, using the shallow riverside groundwater treatment system according to any one of claims 1 to 5, characterized in that: include: Step 1: underground sewage enters the water regulating well (1) from the permeable layer (11) and the water inlet hole, so that the water level in the water regulating well (1) rises; a certain water level difference is formed between the water regulating well (1) located upstream and the water pool (5) located downstream. When the sewage in the water regulating well (1) flows from the transmission pipe (2) into the water inlet area (4) at a certain water flow rate, the water level in the water regulating well (1) is lower than the water level of the surrounding groundwater, thereby providing unpowered driving of the water regulating well; Step 2: After the sewage flows evenly in the water inlet area (4), it flows through the filler module (9) for purification, and the purified water is discharged from the water outlet area (6) to the water outlet weir (7); the purified water is tested for pollutant concentration at the water outlet weir (7), and if the pollutant concentration exceeds the standard limit, the water in the water outlet weir (7) is returned to the water inlet area (4); if the pollutant concentration reaches the standard limit, the water in the water outlet weir (7) is discharged from the water outlet pipe (8); Step 3: After the water in the water outlet weir (7) flows back to the water inlet area (4), the sampling tube on each packing module (9) is started, and part of the water in the water inlet area (4) flows from the respective sampling tubes to the online monitoring device for detection. If the pollutant concentration of the sewage in a certain sampling tube exceeds the standard limit, the packing module (9) connected to the sampling tube is replaced accordingly; Step 4: After the replacement is completed, the remaining water in the water inlet area (4) is passed through the filler module (9) again for purification and detection until the pollutant concentration reaches the standard limit and is discharged.

7. The shallow riverside groundwater treatment method according to claim 6, characterized in that: The water flow rate of the hydraulic regulating well (1) is calculated according to formula (1): Where: Q—water output of water conservancy regulating well, unit: m 3 / d; R—influence radius, unit: m; r—radius of the outer layer of the water conservancy regulating well filter, unit: m; S—water level drop, unit: m; K—permeability coefficient, unit: m / d; H—aquifer thickness, unit: m.

8. The shallow riverside groundwater treatment method according to claim 6, characterized in that: The service life of the packing module (9) is calculated based on the residence time of water in the packing module (9), the water intake and the saturation of the packing module (9). When the service life of the packing module (9) is close to the theoretical service life, a portion of the water in the water inlet area (4) is introduced into a sampling tube and sent to an online monitoring device for detection, and the other portion of the water flows through the packing module (9) for purification and detection.

9. The shallow riverside groundwater treatment method according to claim 6, characterized in that: The water flowing out of the water inlet area (4) passes through a plurality of longitudinal groups of filler modules (9) in sequence to achieve step-by-step purification.

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