Underground water resource utilization and restoration system

Abstract

The invention relates to the field of underground water utilization and pollution remediation, and discloses an underground water resource utilization and remediation system. The system comprises a potential leakage source area, a monitoring area, a public environment area and a water storage area which are sequentially arranged in the flowing direction of underground water. The potential leakage source area comprises a first soil layer, a first pebble bed and a hardened layer from bottom to top, and a leakage risk source located above the first soil layer; water from the potential leakage source area is detected to reach the standard through the monitoring area and then is discharged to the public environment area, and the water storage area is used for storing part of water from the public environment area. The system is suitable for petrochemical enterprises with rich rainfall and large topographic relief, the high-permeability pebble interlayer is constructed underground, adsorption of pollution in soil can be reduced, the pollution is concentrated in horizontal migration instead of vertical migration, and the engineering difficulty of original water and soil integrated treatment is reduced.

Description

Technical Field

[0001] The present invention relates to the field of groundwater utilization and pollution remediation, and in particular to a groundwater resource utilization and remediation system. Background Art

[0002] Water resources have always been precious non-renewable resources, and it is critical to improve the efficiency of water collection and utilization. In some areas with undulating terrain, although rainfall is abundant, underground and surface runoff is strong, and rainwater cannot be effectively collected and utilized, which still leads to water difficulties. Due to the particularity of the materials produced by petrochemical enterprises, once a leak occurs and enters the groundwater, it will spread rapidly, causing the scope of pollution to expand, resulting in the unavailability of part of the groundwater caused by increased rainfall. Timely interception and pollution detection are very important. Therefore, it is very important to carry out infrastructure construction to make water resources efficiently collected and easy to use and to intercept pollution, while ensuring the quality and quantity of water.

[0003] At present, there are pilot "sponge" cities in China for the effective collection of rainwater. They mainly rely on the infiltration of rainwater during the rainy season and release the collected rainwater during the non-rainy season. However, this method cannot intercept pollution and can only achieve the spatiotemporal changes in the release of groundwater resources. At present, the means of improving water quality or pollution control based on the construction of sponge formations are relatively simple, mostly simple filtration and disinfection, which cannot achieve pollution disposal in the chemical industry. Moreover, most of them are rainwater treatment and collection from top to bottom or in a small range. The "gray water layer" in the concept of sponge city is also an impermeable layer, which cannot collect groundwater. The horizontal pollution treatment capacity of the groundwater aquifer from a slightly distant source is weak, and it cannot intercept pollution.

[0004] For example, patent application CN217299211U has established a top-down rainwater grading utilization system, which can improve the water quality and utilization efficiency of rainwater. However, it is only for relatively clean rainwater, and the organic matter in the chemical industry cannot be effectively removed. In addition, there are many leakage risk points in the chemical industry, which requires long-term control, rather than when the groundwater level rises due to rainfall. Therefore, the system cannot achieve daily control of pollution from horizontal migration of groundwater. There are many patents for simple groundwater remediation monitoring systems, but most of them focus on rapid response to groundwater pollution and then automatic repair. They belong to prevention mechanisms and cannot improve the efficiency of groundwater utilization at the same time. They lack the ability to collect and utilize groundwater sources such as rainfall. In addition, after the pollution enters the underground, obvious adsorption will occur, which increases the difficulty of treatment. The existing technologies have not avoided this situation. Most of them are integrated treatment of water and soil pollution after adsorption, which is difficult to repair. For example, Chinese patent application CN111036666A uses in-situ resistance heating and steam-enhanced extraction technology to simultaneously treat soil and groundwater pollution in the site. The project volume is large and it is more difficult than simple groundwater treatment.

[0005] In summary, there are many existing technologies related to the efficient use of groundwater in sponge cities, but most of them are simple water treatment processes, which cannot control and intercept the complex organic pollution in the petrochemical industry. Most of them are simple top-down treatment of rainwater, which is only applicable to the rainy season. It is difficult to control pollution under daily conditions, and it is also impossible to effectively deal with pollution that migrates horizontally. There are also many single remediation technologies, but most of them are integrated water and soil treatment after pollution occurs, which is more difficult than single groundwater pollution remediation. It is even more impossible to take into account both the control of groundwater pollution and the utilization of groundwater resources. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems existing in the prior art, such as the difficulty in simultaneously treating water and soil of groundwater pollution in petrochemical sites, the complexity of equipment pipelines, the high safety risks of conventional repair technologies, and the difficulty in utilizing runoff water resources formed by rainfall, and to provide a groundwater resource utilization and repair system suitable for areas with shallow groundwater burial depth and large terrain undulations.

[0007] In order to achieve the above-mentioned object, the present invention provides a groundwater resource utilization and restoration system, the system comprising: a potential leakage source area, a monitoring area, a public environment area and a water storage area arranged in sequence along the groundwater flow direction;

[0008] The potential leakage source area includes, from bottom to top, a first soil layer, a first pebble layer and a hardened layer, and a leakage risk source located above the first soil layer;

[0009] The water from the potential leakage source area is discharged to the public environment area after being tested and found to meet the standards in the monitoring area, and the water storage area is used to store part of the water from the public environment area.

[0010] Preferably, a plurality of horizontal well screens are laid in the first pebble layer.

[0011] Preferably, the potential leakage source area also includes a repair well, one end of which is connected to the horizontal well screen pipe, and the other end of which extends outside the hardened layer.

[0012] Preferably, the length of the potential leakage source area is 60-200m;

[0013] Preferably, the ratio of the permeability coefficient of the first pebble layer to the first soil layer is ≥10 4 .

[0014] Preferably, the bottom of the first pebble layer is arranged between the lowest groundwater level and the highest groundwater level.

[0015] Preferably, the public environment area comprises, from bottom to top, a second soil layer, a second pebble layer and a permeable layer.

[0016] Preferably, a plurality of second horizontal well screens are laid in the second pebble layer.

[0017] Preferably, the public environmental area also includes a monitoring well.

[0018] Preferably, the ratio of the permeability coefficient of the second pebble layer to the second soil layer is ≥10 4 .

[0019] Preferably, the bottom of the second pebble layer is arranged between the lowest groundwater level and the highest groundwater level.

[0020] Preferably, the monitoring area includes a full-depth water storage tank and a first detection chamber for detecting water quality in the full-depth water storage tank.

[0021] Preferably, the full-depth water storage tank has an inlet gate facing the potential leakage source area and an outlet gate facing the public environmental area;

[0022] Preferably, the bottom of the first pebble layer is located above the bottom of the full-depth reservoir.

[0023] Preferably, the water storage area includes a half-depth water storage tank and a second detection chamber for detecting the water quality in the half-depth water storage tank;

[0024] Preferably, the bottom of the semi-depth water storage tank is arranged between the lowest groundwater level and the highest groundwater level.

[0025] Preferably, a floating water depth measuring device is provided in the semi-depth water storage tank for measuring the water depth in the semi-depth water storage tank.

[0026] Preferably, the semi-depth water storage tank has an inlet gate facing the public environmental area.

[0027] The underground water resource utilization and restoration system described in the present invention is suitable for petrochemical enterprises with abundant rainfall, large terrain undulations and shallow underground water depth (within about 5m). By constructing a highly permeable pebble interlayer underground, the adsorption of pollution in the soil can be reduced, and the pollution can be concentrated on horizontal migration rather than vertical migration, reducing the engineering difficulty of the original water and soil integrated management; the block division is carried out according to the location of the leakage risk point, and the underground pollution is intercepted and regularly detected in the monitoring area, and the underground runoff is collected and utilized in the water storage area, which can effectively improve the utilization capacity of water resources, quickly discover and intercept pollution, and effectively improve the utilization rate of water resources within the entire plant area after commissioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a groundwater resource utilization and restoration system according to some preferred embodiments of the present invention.

[0029] Description of Reference Numerals

[0030] 11 First soil layer 12 First pebble layer

[0031] 13 Hardened layer 14 Horizontal well screen

[0032] 15 Well repair 16 Leakage risk source

[0033] 21 Full depth water storage tank 22 First testing room

[0034] 31 Second soil layer 32 Second pebble layer

[0035] 33 permeable layer 34 monitoring well

[0036] 41 Half-depth water storage tank 42 Second testing room DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0038] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0039] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, unless otherwise specified, features defined as "first" and "second" may explicitly or implicitly include one or more of the features; "plurality" means two or more. The term "including" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof may exist or be added.

[0040] In addition, terms indicating orientation or positional relationships such as "upper", "lower", "inside", and "outside" are described based on the orientation or relative positional relationships shown in the drawings, and are only for the convenience of describing the simplified description of the present application, and do not indicate that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] The present invention provides a groundwater resource utilization and restoration system, the system comprising: a potential leakage source area, a monitoring area, a public environment area and a water storage area arranged in sequence along the groundwater flow direction;

[0042] The potential leakage source area includes, from bottom to top, a first soil layer 11, a first pebble layer 12 and a hardened layer 13, and a leakage risk source 16 located above the first soil layer 11;

[0043] The water from the potential leakage source area is discharged to the public environment area after being tested and found to meet the standards in the monitoring area, and the water storage area is used to store part of the water from the public environment area.

[0044] The groundwater resource utilization and repair system described in the present invention is suitable for areas with shallow groundwater depth and large terrain undulations. In the early stage of the construction of a petrochemical enterprise, the entire plant area of ​​the petrochemical enterprise can be transformed to a certain depth below the ground. According to the location of the possible source of pollutant leakage, the plant area is divided into a potential leakage source area and a public environment area, and a monitoring area is set between the potential leakage source area and the public environment area. A water storage area is set downstream of the public environment area, and then the first soil layer 11, the first pebble layer 12 and the hardened layer 13 are established from bottom to top in the potential leakage source area, and the water resource utilization and repair system described in the present invention is established. Through the groundwater resource utilization and repair system described in the present invention, pollutants quickly enter the pebble layer after entering the underground, and the pollutants can flow radially with the water in the pebble layer, which can reduce soil pollution without the need for additional water and soil co-control; and the runoff formed by rainfall on the ground can be collected, detected and reused. Based on this, the groundwater resource utilization and restoration system described in the present invention can realize the collection of excess rainwater and the interception and restoration of polluted groundwater, and ultimately achieve the comprehensive management goals of reducing water accumulation in the factory area, collecting and utilizing rainwater, and quickly removing groundwater pollution. After the construction of the system is completed, there is basically no need for subsequent investment, which improves the utilization rate of water resources and also provides convenience for groundwater restoration. It is especially suitable for areas where the factory area is located with large slopes, abundant precipitation, but obvious seasonal changes.

[0045] In a preferred embodiment, the leakage risk source 16 may be an area in a petrochemical enterprise plant area with a potential risk of pollutant leakage, such as a tank area, a device area, a loading and unloading platform area, etc. By dividing the area with potential leakage risk into the potential leakage source area of ​​the present invention, and establishing a hardened layer-pebble layer-soil layer structure in the potential leakage source area, based on the large permeability of the pebble layer, even if pollution leakage occurs, the pollutants can move laterally with the water, and the contaminated groundwater can be intercepted by the monitoring area to prevent the pollutants from leaking to other areas and underground.

[0046] In the present invention, there is no special requirement for the location of the leakage risk source 16, and its bottom can be located above the first soil layer 11. For example, the leakage risk source can be a storage tank installed on the hardened layer 13, or an aromatics extraction device whose bottom is buried in the first pebble layer 12.

[0047] Further preferably, within the potential leakage source area, along the groundwater flow direction, the leakage risk source 16 is located upstream.

[0048] In a preferred embodiment, a plurality of horizontal well screens 14 are laid in the first pebble layer 12 .

[0049] Further preferably, at least one of the horizontal well screens 14 is located directly below the leakage risk source 16, which is beneficial to the collection and treatment of pollutants.

[0050] In a preferred embodiment, the potential leakage source area further includes a repair well 15, one end of which is connected to the horizontal well screen 14, and the other end of which extends outside the hardened layer 13. In the present invention, there is no special requirement for the number of the repair wells, which can be one or more.

[0051] Further preferably, the repair well is arranged vertically.

[0052] In the present invention, a number of horizontal well screens 14 are laid in the first pebble layer 12. The horizontal screens 14 not only play the role of collecting water / pollutants, but also provide an engineering basis for subsequent extraction and repair or injection and repair of chemicals. A repair well 15 connected to the horizontal screen 14 is set up, which is similar to the structure of a "can well" to ensure a large effective area during repair. Based on the large permeability coefficient of the first pebble layer 12, the extraction, aeration and injection of chemicals and other repair methods can be used in combination with the type of pollutants. Specifically, extraction, aeration and injection of chemicals can be performed through the repair well 15.

[0053] In a preferred embodiment, the ratio of the permeability coefficient of the first pebble layer 12 to the first soil layer 11 is ≥10 4 In the present invention, by limiting the ratio of the permeability coefficients of the first pebble layer 12 and the first soil layer 11, the permeability coefficient of the first pebble layer 12 is controlled to be much larger than that of the first soil layer 11, so that groundwater or rainwater flows horizontally in the first pebble layer 12, and pollutants flow with the water to the monitoring area for treatment without polluting the soil.

[0054] In the present invention, there is no special requirement for the composition of the first soil layer 11, and it is sufficient to ensure that the permeability coefficient of the first soil layer 11 is at least four orders of magnitude different from the permeability coefficient of the first pebble layer 12. When the system described in the present invention is constructed, the land in the construction area can be investigated. If the local soil itself has a large permeability coefficient (the groundwater is fissure water), the first soil layer 11 can be formed by mixing the local soil with clay; if the local soil itself has a small permeability coefficient, the local soil can be directly used as the first soil layer 11.

[0055] In the present invention, the length of the potential leakage zone can be set by comprehensively considering the groundwater flow velocity and the monitoring frequency. In a preferred embodiment, the length of the potential leakage source zone is 60-200m, more preferably 100-150m.

[0056] In the present invention, at the beginning of the establishment of the system described in the present invention, the depth and water level of the groundwater in the transformation area can be surveyed in advance, and the highest and lowest water levels of the groundwater (such as Figure 1 In a preferred embodiment, the bottom of the first pebble layer 12 is arranged between the lowest groundwater level and the highest groundwater level. Arranging the first pebble layer 12 in this way can ensure that groundwater can flow through the pebble layer all year round.

[0057] In a specific embodiment, the vertical distance between the bottom of the first pebble layer 12 and the lowest groundwater level is 0.5 m.

[0058] In a preferred embodiment, the thickness of the hardened layer may be 10-20 cm.

[0059] According to some preferred embodiments of the present invention, the total thickness of the hardened layer 13, the first pebble layer 12 and the first soil layer 11 may be 3-5 m.

[0060] In the present invention, a monitoring area is set downstream of the potential leakage source area, which can play a role in interception and pollution detection, and ensure that the water discharged to the public environmental area through the monitoring area meets the requirements.

[0061] In a preferred embodiment, the monitoring area includes a full-depth water storage tank 21 and a first detection chamber 22 for detecting the water quality in the full-depth water storage tank 21. The full-depth water storage tank 21 is used to store water from the first pebble layer 12 of the potential pollution source area.

[0062] Further preferably, the full-depth water storage tank 21 has an inlet gate facing the potential leakage source area and an outlet gate facing the public environment area.

[0063] In a specific embodiment, the water inlet gate of the full-depth water storage tank 21 is an automatically opening gate, which can be automatically opened when a large amount of water flows in, and automatically closed after the influx, and will not cause backflow; the water outlet gate of the full-depth water storage tank 21 controls the opening and closing of the gate according to the groundwater pollution situation. When the pollution exceeds the threshold, the gate is closed to intercept the pollution. When it is found that the pollution does not exceed the threshold, the gate is opened to allow water to flow through.

[0064] In a preferred embodiment, the monitoring area further includes a gate switch controller, one end of which is connected to the water outlet gate of the full-depth water storage tank 21, and the other end is connected to the first detection chamber 22. When the first detection chamber 22 detects that the pollutants in the water are less than the threshold value, a signal is transmitted to the gate switch controller, and the gate switch controller controls the state of the water outlet gate.

[0065] In the present invention, there is no special requirement for the detection frequency, detection items and threshold value of the water quality in the full-depth water storage tank detected by the first detection chamber 22. The detection items, detection frequency and threshold value can be determined according to the production data of the potential leakage source area. For example, the detection frequency can be once a month, and the threshold value can be 50% of the Class III water standard.

[0066] In a specific embodiment, the bottom of the first pebble layer 12 is located above the bottom of the full-depth water storage tank 21, that is, the vertical distance between the bottom of the full-depth water storage tank 21 and the lowest groundwater level is smaller than the vertical distance between the bottom of the first pebble layer 12 and the lowest groundwater level. This arrangement allows all the water diverted through the first pebble layer 12 to enter the full-depth water storage tank 21, preventing pollutants from entering other areas.

[0067] In a preferred embodiment, the public environment area includes, from bottom to top, a second soil layer 31 , a second pebble layer 32 and a permeable layer 33 .

[0068] In the present invention, the public environment area can be set in an area of ​​the petrochemical enterprise plant that is usually not easy to generate pollutants, such as offices and canteens. By setting the second soil layer 31, the second pebble layer 32 and the permeable layer 33 from bottom to top in the public environment area, plants can be planted on the permeable layer 33, and rainwater can enter the second pebble layer 32 through the permeable layer, and then be diverted through the second pebble layer 32.

[0069] In a preferred embodiment, the total thickness of the second soil layer 31, the second pebble layer 32 and the permeable layer 33 is 3-4 m.

[0070] Further preferably, the total thickness of the second soil layer 31 , the second pebble layer 32 and the permeable layer 33 is the same as the total thickness of the first soil layer 11 , the first pebble layer 12 and the hardened layer 13 .

[0071] In a specific embodiment, the thickness of the first soil layer 11 is the same as the thickness of the second soil layer 31 , the thickness of the first pebble layer 12 is the same as the thickness of the second pebble layer 32 , and the thickness of the hardened layer 13 is the same as the thickness of the permeable layer 33 .

[0072] In a preferred embodiment, the public environment area further includes a monitoring well 34, which is used to meet the daily monitoring requirements of the enterprise. One end of the monitoring well 34 is located in the second pebble layer 32, and the other end extends to the outside of the permeable layer 33.

[0073] Further preferably, the monitoring well 34 is arranged vertically.

[0074] In a preferred embodiment, the ratio of the permeability coefficient of the second pebble layer 32 to the second soil layer 31 is ≥10 4 In the present invention, by limiting the ratio of the permeability coefficients of the second pebble layer 32 and the second soil layer 31 , the permeability coefficient of the second pebble layer 32 is controlled to be much greater than that of the second soil layer 31 , so that groundwater or rainwater flows laterally in the second pebble layer 32 .

[0075] In the present invention, at the beginning of the establishment of the system of the present invention, the depth and water level of the groundwater in the transformation area can be surveyed in advance. In a preferred embodiment, the bottom of the second pebble layer 32 is set between the lowest groundwater level and the highest groundwater level. Setting the pebble layer in this way can ensure that groundwater can flow through the pebble layer all year round.

[0076] In the present invention, there is no special requirement for the composition of the second soil layer 31, and it is sufficient to ensure that the permeability coefficient of the second soil layer 31 is at least four orders of magnitude different from the permeability coefficient of the second pebble layer 32. When the system described in the present invention is constructed, the land in the construction area can be investigated. If the local soil itself has a large permeability coefficient (the groundwater is fissure water), the second soil layer 31 can be formed by mixing the local soil with clay; if the local soil itself has a small permeability coefficient, the local soil can be directly used as the second soil layer 32.

[0077] In a preferred embodiment, the water storage area includes a half-depth water storage tank 41 and a second detection chamber 42 for detecting the water quality in the half-depth water storage tank 41. The half-depth water storage tank 41 is used to store part of the water from the second pebble layer 32, and the second detection chamber 42 is used to detect the water quality in the half-depth water storage tank 41. If the water quality exceeds the threshold, the water is changed for use or sent to the enterprise sewage treatment plant, and if the water quality does not exceed the threshold, the water can be used directly.

[0078] In a preferred embodiment, the bottom of the half-depth water storage tank 31 is set between the lowest groundwater level and the highest groundwater level, and the vertical distance between the bottom of the half-depth water storage tank 31 and the lowest groundwater level is greater than the vertical distance between the bottom of the second pebble layer 32 and the lowest groundwater level. By limiting the height of the half-depth water storage tank 41 in the vertical direction, when the rainfall is small or there is no rainfall, the water level in the second pebble layer 32 is low, and the half-depth water storage tank 41 does not store water, which does not affect the normal groundwater activity; when the rainfall is large, rainwater enters the second pebble layer 32 through the permeable layer, and the water level rises so that part of the water enters the half-depth water storage tank 41 for storage.

[0079] In a preferred embodiment, a floating water depth measuring device is provided in the semi-depth water storage tank 41 for measuring the water depth in the semi-depth water storage tank 41 .

[0080] In a preferred embodiment, the semi-depth water storage tank 41 has a water inlet gate facing the public environmental area.

[0081] In a preferred embodiment, there are no special requirements for the detection items and thresholds of the water quality detected by the second detection chamber 42 in the full-depth water storage tank 41, and the detection items and thresholds can be determined based on the production data of the potential leakage source area.

[0082] The present invention belongs to the infrastructure part. By building a groundwater resource utilization and repair system, the collection and utilization capacity of water resources in the plant area is improved, and the diversion of pollution is realized synchronously through the setting of the pebble layer, so that the pollution is not adsorbed on the soil, and it migrates laterally with the groundwater, reducing the difficulty of repair, and intercepting the pollution through the full-depth water storage tank. The horizontal screen and the repair well are preset in the pebble layer. It belongs to the infrastructure of various repair technologies and can be used for repair once pollution occurs. When the rainfall is large, the half-depth water storage well can collect the diverted water, reduce the loss of underground runoff, and use it directly. The groundwater resource utilization and repair system described in the present invention can be widely used in areas where the slope of the plant area is large, the groundwater is shallow, the rainfall is abundant but the seasonal changes are obvious, and it can realize the utilization and management integration of groundwater resources that meet the characteristics of the petrochemical industry.

[0083] The present invention will be described in detail below through examples, but the protection scope of the present invention is not limited thereto.

[0084] Example 1

[0085] A petrochemical enterprise A is located in a mountainous area with abundant rainfall and obvious seasonality. The groundwater depth is 2m, with a seasonal variation of about 1m, and is mainly pore water. According to the distribution of the plant area under construction, a groundwater resource utilization and restoration system is established.

[0086] Combined with reference Figure 1 , the groundwater resource utilization and restoration system includes: potential leakage source area, monitoring area, public environment area and water storage area arranged in sequence along the groundwater flow direction;

[0087] The potential leakage source area includes, from bottom to top, a first soil layer 11, a first pebble layer 12 and a hardened layer 13, and a leakage risk source 16 located above the first soil layer; the bottom of the first pebble layer 12 is set between the lowest groundwater level and the highest groundwater level;

[0088] The public environment area includes, from bottom to top, a second soil layer 31, a second pebble layer 32 and a permeable layer 33; the bottom of the second pebble layer 32 is set between the lowest groundwater level and the highest groundwater level;

[0089] The water from the potential leakage source area is discharged to the public environment area after being tested and found to meet the standards in the monitoring area, and the water storage area is used to store part of the water from the public environment area;

[0090] Among them, leakage risk sources 16 include tank areas, device areas and loading and unloading platform areas; canteens and office buildings are distributed in public environment areas;

[0091] According to the size of the plant and its own control requirements, Enterprise A sets the length of the potential leakage source area to 120m. Because the underground geological type is sandy clay with a small permeability coefficient, the original soil is directly selected as the first soil layer 11 and the second soil layer 31, satisfying the permeability coefficient ratio of the first pebble layer 12 to the first soil layer 11 ≥ 10 4 The ratio of the permeability coefficient of the second pebble layer 32 to the second soil layer 31 is ≥10 4 ; Combined with the construction difficulty, in the potential leakage source area, the thickness of the first soil layer 11 is 0.5m, the thickness of the first pebble layer 12 is 2.9m, and the thickness of the hardened layer 13 is 0.2m; in the public environment area, the thickness of the second soil layer 31 is 0.5m, the thickness of the second pebble layer 32 is 2.9m, and the thickness of the permeable layer 33 is 0.2m. The overall construction depth is 3.6m;

[0092] In combination with enterprise management and control requirements, two horizontal well screens 14 are laid in the first pebble layer 12, one of which is located directly below the leakage risk source 16; the potential leakage source area also includes a repair well 15 arranged in a one-to-one correspondence with the horizontal well screen 14; the repair well is arranged vertically, one end of the repair well 15 is connected to the horizontal well screen 14, and the other end extends to the outside of the hardened layer 13;

[0093] The monitoring area includes a full-depth water tank 21, a first detection chamber 22 for detecting the water quality in the full-depth water tank 21, and a gate switch controller; the full-depth water tank 21 is used to store water from the first pebble layer 12 of the potential pollution source area, the bottom of the first pebble layer 12 is located above the bottom of the full-depth water tank 21, the full-depth water tank 21 has an inlet gate facing the potential leakage source area and an outlet gate facing the public environment area, and the inlet gate of the full-depth water tank 21 is an automatically opened gate; one end of the gate switch controller is connected to the outlet gate of the full-depth water tank 21, and the other end is connected to the first detection chamber 22;

[0094] The public environment area further comprises a vertically arranged monitoring well 34, one end of which is located in the second pebble layer 32, and the other end of which extends to the outside of the permeable layer 33;

[0095] The water storage area includes a half-depth water storage tank 41 and a second detection chamber 42 for detecting the water quality in the half-depth water storage tank 41; the bottom of the half-depth water storage tank 31 is set between the lowest groundwater level and the highest groundwater level, and the vertical distance between the bottom of the half-depth water storage tank 31 and the lowest groundwater level is 1.1m greater than the vertical distance between the bottom of the second pebble layer 32 and the lowest groundwater level; a floating water depth meter is provided in the half-depth water storage tank 41.

[0096] When using the above-mentioned groundwater resource utilization and restoration system, the detection items are set according to the production data of enterprise A. The first detection room 22 mainly detects benzene series, and sets the threshold to 50% of the three-category water standard, and sets the detection frequency to 1 month / time; when the detection result is less than or greater than the threshold, a signal is transmitted to the switch controller to control the opening and closing of the water outlet; when the pollution exceeds the threshold, the water outlet is closed to intercept the pollution, and when it is found that the pollution does not exceed the threshold, the gate is opened to allow water to flow through. The detection items of the second detection room are 55 detection items such as benzene, petroleum hydrocarbons (C10-C40), and methyl tert-butyl ether.

[0097] During the three months of use, high-concentration petroleum hydrocarbon pollution was found in the daily pollution detection of the first detection chamber 22. The water outlet was closed and the pre-buried repair well 15 was used for pumping water. The repair was stopped and the water outlet was opened after the test results of the first detection chamber 22 met the standards.

[0098] Example 2

[0099] A petrochemical enterprise B is located in a mountainous area with abundant rainfall and obvious seasonality. The groundwater depth is 3m, with a seasonal variation of about 0.5m, and is mainly fissure water. According to the distribution of the plant area under construction, a groundwater resource utilization and restoration system is established.

[0100] The groundwater resource utilization and restoration system includes: a potential leakage source area, a monitoring area, a public environment area and a water storage area arranged in sequence along the groundwater flow direction;

[0101] The potential leakage source area includes, from bottom to top, a first soil layer 11, a first pebble layer 12 and a hardened layer 13, and a leakage risk source 16 located above the first soil layer; the bottom of the first pebble layer 12 is set between the lowest groundwater level and the highest groundwater level;

[0102] The public environment area includes, from bottom to top, a second soil layer 31, a second pebble layer 32 and a permeable layer 33; the bottom of the second pebble layer 32 is set between the lowest groundwater level and the highest groundwater level;

[0103] The water from the potential leakage source area is discharged to the public environment area after being tested and found to meet the standards in the monitoring area, and the water storage area is used to store part of the water from the public environment area;

[0104] Among them, leakage risk sources 16 include tank areas, device areas and loading and unloading platform areas; canteens and office buildings are distributed in public environment areas;

[0105] According to the size of the plant and its own control requirements, Enterprise B sets the length of the potential leakage source area to 150m. Because the groundwater is mainly fissure water and the permeability coefficient is too large, the original soil is directly mixed with clay as the first soil layer 11 and the second soil layer 31, and the permeability coefficient ratio of the first pebble layer 12 to the first soil layer 11 after filling is ≥10. 4 The ratio of the permeability coefficient of the second pebble layer 32 to the second soil layer 31 is ≥10 4 ; Considering the construction difficulty, in the potential leakage source area, the thickness of the first soil layer 11 is 0.5m, the thickness of the first pebble layer 12 is 3.5m, and the thickness of the hardened layer 13 is 0.1m; in the public environment area, the thickness of the second soil layer 31 is 0.1m, the thickness of the second pebble layer 32 is 3.5m, and the thickness of the permeable layer 33 is 0.5m. The overall construction depth is 4.1m;

[0106] In combination with enterprise management and control requirements, four horizontal well screens 14 are laid in the first pebble layer 12, one of which is located directly below the leakage risk source 16; the potential leakage source area also includes four vertically arranged repair wells 15, one end of the repair well 15 is connected to the horizontal well screen 14, and the other end extends to the outside of the hardened layer 13;

[0107] The monitoring area includes a full-depth water tank 21, a first detection chamber 22 for detecting the water quality in the full-depth water tank 21, and a gate switch controller; the full-depth water tank 21 is used to store water from the first pebble layer 12 of the potential pollution source area, the bottom of the first pebble layer 12 is located above the bottom of the full-depth water tank 21, the full-depth water tank 21 has an inlet gate facing the potential leakage source area and an outlet gate facing the public environment area, and the inlet gate of the full-depth water tank 21 is an automatically opened gate; one end of the gate switch controller is connected to the outlet gate of the full-depth water tank 21, and the other end is connected to the first detection chamber 22;

[0108] The public environment area further comprises a vertically arranged monitoring well 34, one end of which is located in the second pebble layer 32, and the other end of which extends to the outside of the permeable layer 33;

[0109] The water storage area includes a half-depth water storage tank 41 and a second detection chamber 42 for detecting the water quality in the half-depth water storage tank 41; the bottom of the half-depth water storage tank 31 is set between the lowest groundwater level and the highest groundwater level, and the vertical distance between the bottom of the half-depth water storage tank 31 and the lowest groundwater level is 0.6m greater than the vertical distance between the bottom of the second pebble layer 32 and the lowest groundwater level; a floating water depth meter is provided in the half-depth water storage tank 41.

[0110] When using the above-mentioned groundwater resource utilization and restoration system, the detection items are set according to the production data of enterprise B. The first detection chamber 22 mainly detects petroleum hydrocarbons, and sets the threshold to 50% of the three-category water standard, and sets the detection frequency to 1 month / time; when the detection result is less than or greater than the threshold, a signal is transmitted to the switch controller to control the opening and closing of the water outlet; when the pollution exceeds the threshold, the water outlet is closed to intercept the pollution, and when it is found that the pollution does not exceed the threshold, the gate is opened to allow water to flow through. The detection items of the second detection chamber 42 are 23 detection items such as petroleum hydrocarbons (C10-C40), ethyl chloride, and benzene.

[0111] During the three months of use, high concentration of benzene pollution was found in the daily pollution detection of the first detection chamber 22. The water outlet was closed and the pre-buried repair well 15 was used for pumping water. The repair was stopped and the water outlet was opened after the test results of the first detection chamber 22 met the standards.

[0112] Example 3

[0113] A petrochemical enterprise C is located in a mountainous area with abundant rainfall and obvious seasonality. The groundwater depth is 3m, with a seasonal variation of about 1m, and is mainly pore water. According to the distribution of the plant area under construction, a groundwater resource utilization and restoration system is established.

[0114] The groundwater resource utilization and restoration system includes: a potential leakage source area, a monitoring area, a public environment area and a water storage area arranged in sequence along the groundwater flow direction;

[0115] The potential leakage source area includes, from bottom to top, a first soil layer 11, a first pebble layer 12 and a hardened layer 13, and a leakage risk source 16 located above the first soil layer; the bottom of the first pebble layer 12 is set between the lowest groundwater level and the highest groundwater level;

[0116] The public environment area includes, from bottom to top, a second soil layer 31, a second pebble layer 32 and a permeable layer 33; the bottom of the second pebble layer 32 is set between the lowest groundwater level and the highest groundwater level;

[0117] The water from the potential leakage source area is discharged to the public environment area after being tested and found to meet the standards in the monitoring area, and the water storage area is used to store part of the water from the public environment area;

[0118] Among them, leakage risk sources 16 include tank areas, device areas and loading and unloading platform areas; canteens and office buildings are distributed in public environment areas;

[0119] According to the size of the plant and its own control requirements, Enterprise C sets the length of the potential leakage source area to 200m, because the groundwater is mainly pore water and the ratio of the permeability coefficient of the first pebble layer 12 to the first soil layer 11 is ≥10 4 The ratio of the permeability coefficient of the second pebble layer 32 to the second soil layer 31 is ≥10 4 Therefore, the original soil is directly selected as the first soil layer and the second soil layer; considering the construction difficulty, in the potential leakage source area, the thickness of the first soil layer 11 is 0.5m, the thickness of the first pebble layer 12 is 3.85m, and the thickness of the hardened layer 13 is 0.15m; in the public environment area, the thickness of the second soil layer 31 is 0.5m, the thickness of the second pebble layer 32 is 3.85m, and the thickness of the permeable layer is 0.15m. The overall construction depth is 4.5m;

[0120] In combination with the enterprise management and control requirements, seven horizontal well screens 14 are laid in the first pebble layer 12, one of which is located directly below the leakage risk source 16; the potential leakage source area also includes a repair well 15 arranged one-to-one with the horizontal well screen 14; one end of the repair well 15 is connected to the horizontal well screen 14, and the other end extends to the outside of the hardened layer 13;

[0121] The monitoring area includes a full-depth water tank 21, a first detection chamber 22 for detecting the water quality in the full-depth water tank 21, and a gate switch controller; the full-depth water tank 21 is used to store water from the first pebble layer 12 of the potential pollution source area, the bottom of the first pebble layer 12 is located above the bottom of the full-depth water tank 21, the full-depth water tank 21 has an inlet gate facing the potential leakage source area and an outlet gate facing the public environment area, and the inlet gate of the full-depth water tank 21 is an automatically opened gate; one end of the gate switch controller is connected to the outlet gate of the full-depth water tank 21, and the other end is connected to the first detection chamber 22;

[0122] The public environment area also includes two vertically arranged monitoring wells 34, one end of the monitoring well 34 is located in the second pebble layer 32, and the other end extends to the outside of the permeable layer 33;

[0123] The water storage area includes a half-depth water storage tank 41 and a second detection chamber 42 for detecting the water quality in the half-depth water storage tank 41; the bottom of the half-depth water storage tank 31 is set between the lowest groundwater level and the highest groundwater level, and the vertical distance between the bottom of the half-depth water storage tank 31 and the lowest groundwater level is 1m greater than the vertical distance between the bottom of the second pebble layer 32 and the lowest groundwater level; a floating water depth meter is provided in the half-depth water storage tank 41.

[0124] When using the above-mentioned groundwater resource utilization and restoration system, the detection items are set according to the production data of enterprise C. The first detection room 22 mainly detects petroleum hydrocarbons, and sets the threshold to 50% of the three-category water standard, and sets the detection frequency to 1 month / time; when the detection result is less than or greater than the threshold, a signal is transmitted to the switch controller to control the opening and closing of the water outlet; when the pollution exceeds the threshold, the water outlet gate is closed to intercept the pollution, and when it is found that the pollution does not exceed the threshold, the gate is opened to allow water to flow through. The second detection room detects 10 detection items such as petroleum hydrocarbons (C10-C40) and benzene.

[0125] During the three months of use, if no pollution is found in the daily pollution detection of the first detection chamber 22, the water outlet gate is opened to allow the groundwater in the door to automatically enter the public environment area; and with rainfall, after the groundwater and rainwater converge in the public environment area, part of the water enters the semi-depth water storage tank 41, and the water quality is qualified when it is pumped out for direct use.

[0126] Example 4

[0127] A petrochemical enterprise D is located in a mountainous area with abundant rainfall and obvious seasonality. The groundwater depth is 2.5m, with a seasonal variation of about 1m, and is mainly pore water. According to the distribution of the plant area under construction, a groundwater resource utilization and restoration system is established.

[0128] The groundwater resource utilization and restoration system includes: a potential leakage source area, a monitoring area, a public environment area and a water storage area arranged in sequence along the groundwater flow direction;

[0129] The potential leakage source area includes, from bottom to top, a first soil layer 11, a first pebble layer 12 and a hardened layer 13, and a leakage risk source 16 located above the first soil layer; the bottom of the first pebble layer 12 is set between the lowest groundwater level and the highest groundwater level;

[0130] The public environment area includes, from bottom to top, a second soil layer 31, a second pebble layer 32 and a permeable layer 33; the bottom of the second pebble layer 32 is set between the lowest groundwater level and the highest groundwater level;

[0131] The water from the potential leakage source area is discharged to the public environment area after being tested and found to meet the standards in the monitoring area, and the water storage area is used to store part of the water from the public environment area;

[0132] Among them, leakage risk sources 16 include tank areas, device areas and loading and unloading platform areas; canteens and office buildings are distributed in public environment areas;

[0133] According to the size of the plant and its own control requirements, Enterprise C sets the length of the potential leakage source area to 60m. Because the groundwater is mainly pore water, the ratio of the permeability coefficient of the first pebble layer 12 to the first soil layer 11 is ≥10 4 The ratio of the permeability coefficient of the second pebble layer 32 to the second soil layer 31 is ≥10 4 Therefore, the original soil is directly selected as the first soil layer and the second soil layer; combined with the construction difficulty, in the potential leakage source area, the thickness of the first soil layer 11 is 0.5m, the thickness of the first pebble layer 12 is 3.8m, and the thickness of the hardened layer 13 is 0.2m. In the public environment area, the thickness of the second soil layer 31 is 0.5m, the thickness of the second pebble layer 32 is 3.8m, and the thickness of the permeable layer 33 is 0.2m. The overall construction depth is 4.5m;

[0134] In combination with enterprise management and control requirements, four horizontal well screens 14 are laid in the first pebble layer 12, one of which is located directly below the leakage risk source 16; the potential leakage source area also includes a repair well 15 arranged one-to-one with the horizontal well screen 14; the repair well is arranged vertically, one end of the repair well 15 is connected to the horizontal well screen 14, and the other end extends to the outside of the hardened layer 13;

[0135] The monitoring area includes a full-depth water tank 21, a first detection chamber 22 for detecting the water quality in the full-depth water tank 21, and a gate switch controller; the full-depth water tank 21 is used to store water from the first pebble layer 12 of the potential pollution source area, the bottom of the first pebble layer 12 is located above the bottom of the full-depth water tank 21, the full-depth water tank 21 has an inlet gate facing the potential leakage source area and an outlet gate facing the public environment area, and the inlet gate of the full-depth water tank 21 is an automatically opened gate; one end of the gate switch controller is connected to the outlet gate of the full-depth water tank 21, and the other end is connected to the first detection chamber 22;

[0136] The public environment area also includes two vertically arranged monitoring wells 34, one end of the monitoring well 34 is located in the second pebble layer 32, and the other end extends to the outside of the permeable layer 33;

[0137] The water storage area includes a half-depth water storage tank 41 and a second detection chamber 42 for detecting the water quality in the half-depth water storage tank 41; the bottom of the half-depth water storage tank 31 is set between the lowest groundwater level and the highest groundwater level, and the vertical distance between the bottom of the half-depth water storage tank 31 and the lowest groundwater level is 1.5m greater than the vertical distance between the bottom of the second pebble layer 32 and the lowest groundwater level; a floating water depth meter is provided in the half-depth water storage tank 41.

[0138] When using the above-mentioned groundwater resource utilization and restoration system, the detection items are set according to the production data of enterprise D. The first detection room 22 mainly detects petroleum hydrocarbons, and sets the threshold to 50% of the three-category water standard, and sets the detection frequency to 1 month / time; when the detection result is less than or greater than the threshold, a signal is transmitted to the switch controller to control the opening and closing of the water outlet; when the pollution exceeds the threshold, the water outlet gate is closed to intercept the pollution, and when it is found that the pollution does not exceed the threshold, the gate is opened to allow water to flow through. The detection items of the second detection room are 10 detection items such as benzene.

[0139] During the three months of use, if no pollution is found in the daily pollution detection of the first detection chamber 22, the water outlet gate is opened to allow the groundwater in the door to automatically enter the public environment area; and with rainfall, after the groundwater and rainwater converge in the public environment area, part of the water enters the semi-depth water storage tank 41, and the water quality is qualified when it is pumped out for direct use.

[0140] Example 5

[0141] A petrochemical enterprise E is located in a mountainous area with abundant rainfall and obvious seasonality. The groundwater depth is 2.5m, with a seasonal variation of about 1m, and is mainly pore water. According to the distribution of the plant area under construction, a groundwater resource utilization and restoration system is established.

[0142] The groundwater resource utilization and restoration system includes: a potential leakage source area, a monitoring area, a public environment area and a water storage area arranged in sequence along the groundwater flow direction;

[0143] The potential leakage source area includes, from bottom to top, a first soil layer 11, a first pebble layer 12 and a hardened layer 13, and a leakage risk source 16 located above the first soil layer; the bottom of the first pebble layer 12 is set between the lowest groundwater level and the highest groundwater level;

[0144] The public environment area includes, from bottom to top, a second soil layer 31, a second pebble layer 32 and a permeable layer 33; the bottom of the second pebble layer 32 is set between the lowest groundwater level and the highest groundwater level;

[0145] The water from the potential leakage source area is discharged to the public environment area after being tested and found to meet the standards in the monitoring area, and the water storage area is used to store part of the water from the public environment area;

[0146] Among them, leakage risk sources 16 include tank areas, device areas and loading and unloading platform areas; canteens and office buildings are distributed in public environment areas;

[0147] Enterprise E sets the length of the potential leakage source area to 120m according to the size of the plant and its own control requirements. Because the groundwater is mainly pore water and the ratio of the permeability coefficient of the first pebble layer 12 to the first soil layer 11 is ≥10 4 The ratio of the permeability coefficient of the second pebble layer 32 to the second soil layer 31 is ≥10 4 Therefore, the original soil is directly selected as the first soil layer and the second soil layer; considering the construction difficulty, in the potential leakage source area, the thickness of the first soil layer 11 is 0.5m, the thickness of the first pebble layer 12 is 3.9m, and the thickness of the hardened layer is 0.1m; in the public environment area, the thickness of the second soil layer 31 is 0.5m, the thickness of the second pebble layer 32 is 3.9m, and the thickness of the permeable layer 33 is 0.1m, and the overall construction depth is 4.5m;

[0148] In combination with enterprise management and control requirements, four horizontal well screens 14 are laid in the first pebble layer 12, one of which is located directly below the leakage risk source 16; the potential leakage source area also includes a repair well 15 arranged one-to-one with the horizontal well screen 14; the repair well is arranged vertically, one end of the repair well 15 is connected to the horizontal well screen 14, and the other end extends to the outside of the hardened layer 13;

[0149] The monitoring area includes a full-depth water tank 21, a first detection chamber 22 for detecting the water quality in the full-depth water tank 21, and a gate switch controller; the full-depth water tank 21 is used to store water from the first pebble layer 12 of the potential pollution source area, the bottom of the first pebble layer 12 is located above the bottom of the full-depth water tank 21, the full-depth water tank 21 has an inlet gate facing the potential leakage source area and an outlet gate facing the public environment area, and the inlet gate of the full-depth water tank 21 is an automatically opened gate; one end of the gate switch controller is connected to the outlet gate of the full-depth water tank 21, and the other end is connected to the first detection chamber 22;

[0150] The public environment area also includes two vertically arranged monitoring wells 34, one end of the monitoring well 34 is located in the second pebble layer 32, and the other end extends to the outside of the permeable layer 33;

[0151] The water storage area includes a half-depth water storage tank 41 and a second detection chamber 42 for detecting the water quality in the half-depth water storage tank 41; the bottom of the half-depth water storage tank 31 is set between the lowest groundwater level and the highest groundwater level, and the vertical distance between the bottom of the half-depth water storage tank 31 and the lowest groundwater level is 1.5m greater than the vertical distance between the bottom of the second pebble layer 32 and the lowest groundwater level; a floating water depth meter is provided in the half-depth water storage tank 41.

[0152] When using the above-mentioned groundwater resource utilization and restoration system, the detection items are set according to the production data of enterprise E. The first detection room 22 mainly detects petroleum hydrocarbons, and sets the threshold to 50% of the three-category water standard, and sets the detection frequency to 1 month / time; when the detection result is less than or greater than the threshold, a signal is transmitted to the switch controller to control the opening and closing of the water outlet; when the pollution exceeds the threshold, the water outlet gate is closed to intercept the pollution, and when it is found that the pollution does not exceed the threshold, the gate is opened to allow water to flow through. The detection items of the second detection room are 10 detection items such as benzene.

[0153] During the three months of use, no pollution was found in the daily pollution detection of the first detection chamber 22, so the water outlet was opened to allow the groundwater to automatically enter the public environment area; and due to the influence of special weather in the past three months, there was no rainfall, resulting in the groundwater level being at the lowest level, and the semi-depth water storage tank was in a state of no water storage.

[0154] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A groundwater resource utilization and restoration system, It is characterized in that The system comprises: a potential leakage source area, a monitoring area, a public environment area and a water storage area arranged in sequence along the groundwater flow direction; The potential leakage source area includes, from bottom to top, a first soil layer (11), a first pebble layer (12) and a hardened layer (13), and a leakage risk source (16) located above the first soil layer; The water from the potential leakage source area is discharged to the public environment area after being tested and found to meet the standards in the monitoring area, and the water storage area is used to store part of the water from the public environment area.

2. The groundwater resource utilization and restoration system according to claim 1, It is characterized in that A plurality of horizontal well screen pipes (14) are laid in the first pebble layer (12).

3. The groundwater resource utilization and restoration system according to claim 2, It is characterized in that The potential leakage source area also includes a repair well (15), one end of which is connected to the horizontal well screen (14) and the other end of which extends outside the hardened layer (13).

4. The groundwater resource utilization and restoration system according to any one of claims 1 to 3, It is characterized in that The length of the potential leakage source area is 60-200m; Preferably, the ratio of the permeability coefficient of the first pebble layer (12) to the first soil layer (11) is ≥10 4 .

5. The groundwater resource utilization and restoration system according to any one of claims 1 to 4, It is characterized in that The bottom of the first pebble layer (12) is arranged between the lowest groundwater level and the highest groundwater level.

6. The groundwater resource utilization and restoration system according to any one of claims 1 to 4, It is characterized in that The public environment area comprises, from bottom to top, a second soil layer (31), a second pebble layer (32) and a permeable layer (33).

7. The groundwater resource utilization and restoration system according to claim 6, It is characterized in that The public environmental area also includes a monitoring well (33).

8. The groundwater resource utilization and restoration system according to claim 6, It is characterized in that The ratio of the permeability coefficient of the second pebble layer (32) to the second soil layer (31) is ≥10 4 .

9. The groundwater resource utilization and restoration system according to any one of claims 6 to 8, It is characterized in that The bottom of the second pebble layer (32) is arranged between the lowest groundwater level and the highest groundwater level.

10. The groundwater resource utilization and restoration system according to any one of claims 1 to 9, It is characterized in that The monitoring area comprises a full-depth water storage tank (21) and a first detection chamber (22) for detecting the water quality in the full-depth water storage tank (21).

11. The groundwater resource utilization and restoration system according to claim 10, It is characterized in that The full-depth water storage tank (21) has an inlet gate facing the potential leakage source area and an outlet gate facing the public environment area; Preferably, the bottom of the first pebble layer (12) is located above the bottom of the full-depth water storage tank (21).

12. The groundwater resource utilization and restoration system according to any one of claims 1 to 11, It is characterized in that The water storage area comprises a half-depth water storage tank (41) and a second detection chamber (42) for detecting the water quality in the half-depth water storage tank (41); Preferably, the bottom of the semi-depth water storage tank (41) is arranged between the lowest groundwater level and the highest groundwater level.

13. The groundwater resource utilization and restoration system according to claim 12, It is characterized in that A floating water depth measuring device is provided in the semi-depth water storage tank (41) for measuring the water depth in the semi-depth water storage tank (41).

14. The groundwater resource utilization and restoration system according to claim 12 or 13, It is characterized in that The semi-depth water storage tank (41) has a water inlet gate facing the public environmental area.

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