Underground and earth surface joint control system and joint control method for water body pollution

Abstract

The invention discloses an underground and earth surface joint control system and joint control method for water pollution, and relates to the technical field of water pollution management and control, the underground and earth surface joint control system comprises a blocking closure area, a source cutting plume control area and an underground water level control area, the blocking closure area and the source cutting plume control area are both arranged on a polluted underground water flowing path, the underground water level control area is a concentrated drainage area for polluted underground water to flow to surface water, and the blocking and intercepting area, the source cutting and feather controlling area and the underground water level control area are each provided with a plurality of underground water wells; the underground water well in the blocking and intercepting area is used for blocking and intercepting pollutants to migrate downstream, and the non-Fick dispersion characteristic of the underground water well in the source cutting and feather control area for weakening the polluted underground water is matched, so that a good control effect on the polluted underground water can be achieved; the water level of the polluted underground water below the centralized drainage area is lowered to the position below a riverbed, the polluted underground water is prevented from being drained to surface water, and the control effect on the surface water is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution control, and in particular to an underground and surface joint control system and a joint control method for water pollution. Background Art

[0002] Among the currently known emergency control measures for water pollution, the pollution of groundwater is controlled by methods such as extraction and purification through well groups or interception ditches, and the pollution of surface water is controlled by methods such as diversion and purification. The two are often relatively independent control plans. Even if the aforementioned plans are used to control water pollution, for areas with significant heterogeneity of aquifers, complex groundwater runoff systems, fast runoff velocities, and close hydraulic connections between groundwater and surface water, once the groundwater is polluted, the pollutants will, on the one hand, migrate rapidly downstream along the underground strong runoff zone, and on the other hand, enter the surface water body as the groundwater recharges the surface water. As the surface runoff migrates rapidly, the groundwater will be polluted again in the reverse direction in the section where the surface water recharges the groundwater. Therefore, the currently known emergency control methods have the problem of poor control effect.

[0003] Therefore, people are in urgent need of an underground and surface joint control system for water pollution with good control effect. Summary of the invention

[0004] The purpose of the present invention is to provide an underground and surface joint control system and method for water pollution, so as to solve the problems existing in the above-mentioned prior art. The blocking interception area, the source reduction control area and the groundwater level control area are coordinated to realize the control of both groundwater and surface water, thereby improving the control effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides an underground and surface joint control system for water pollution, comprising a blocking and intercepting area for pumping contaminated groundwater, a source reduction and feather control area for weakening the non-Fickian dispersion of contaminated groundwater, and a groundwater level control area for lowering the contaminated groundwater level to below the riverbed, the blocking and intercepting area and the source reduction and feather control area are both arranged on the flow path of the contaminated groundwater, the groundwater level control area is a centralized discharge area for contaminated groundwater flowing to surface water, and the blocking and intercepting area, the source reduction and feather control area and the groundwater level control area are respectively provided with a plurality of groundwater wells.

[0006] Preferably, the underground-surface joint control system for water pollution also includes a clean water interception area for extracting clean groundwater, the clean water interception area is arranged upstream of the flow path of the polluted groundwater, and the clean water interception area is provided with a plurality of groundwater wells.

[0007] Preferably, the depths of the groundwater wells in the blocking and intercepting area, the source cutting and feather control area, the groundwater level control area and the clean water intercepting area penetrate the bottom plate of the aquifer and enter the weakly weathered bedrock, and submersible pumps for pumping water are provided in the groundwater wells.

[0008] Preferably, the well pipes of the groundwater wells in the blocking and intercepting area, the source reduction and feather control area, the groundwater level control area and the clean water intercepting area include a filter pipe and solid pipes arranged at both ends of the filter pipe, and the filter pipe is arranged corresponding to the groundwater aquifer.

[0009] Preferably, the underground and surface joint control system for water pollution also includes a surface water diversion area that provides a flow path for surface rivers. The surface water diversion area is staggered with the groundwater level control area, and the surface water diversion area is provided with a river flow channel.

[0010] Preferably, the blocking and intercepting area is arranged in a narrow section of the contaminated groundwater flow path.

[0011] Preferably, a plurality of groundwater wells arranged in rows are provided in the blocking and intercepting area, and the arrangement direction of the plurality of groundwater wells is perpendicular to the flow direction of the contaminated groundwater.

[0012] Preferably, a plurality of rows of groundwater wells are arranged in the blocking and intercepting area, and the groundwater wells in adjacent rows are staggered.

[0013] Preferably, a plurality of the source reduction feather control zones are provided, and the plurality of the source reduction feather control zones are evenly distributed on the flow path of the contaminated groundwater.

[0014] The present invention also provides an underground-surface joint control method for water pollution using the above-mentioned underground-surface joint control system for water pollution, comprising the following steps:

[0015] S1: Groundwater wells are laid out in the interception and interception areas, source reduction and plume control areas, and groundwater level control areas;

[0016] S2: Monitor the vertical stratified pollutant concentration of groundwater in the well, and pump water to lower the groundwater level to below the contaminated layer. The groundwater level in the corresponding groundwater level control area must be guaranteed to drop below the water bed;

[0017] S3: The extracted polluted water is transported to the sewage treatment plant for treatment.

[0018] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0019] By using the groundwater wells in the blocking and intercepting area to pump out the contaminated groundwater, the migration of pollutants to the downstream can be blocked. In conjunction with the groundwater wells in the source reduction and feather control area, the non-Fickian diffusion characteristics of the contaminated groundwater can be weakened by pumping water, which can achieve a good control effect on the contaminated groundwater. At the same time, through the groundwater wells in the groundwater level control area, the water level of the contaminated groundwater below the concentrated discharge area of ​​the surface water can be lowered to below the riverbed, preventing the contaminated groundwater from being discharged into the surface water, thereby improving the control effect on the surface water.

[0020] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0021] The establishment of groundwater wells in the clean water interception area can extract uncontaminated clean water for direct use, realize the separation of clean and polluted water, and at the same time reduce the amount of clean water entering polluted groundwater, reduce the pressure of sewage pumping and purification in the interception area, source reduction and feather control area, and groundwater level control area. At the same time, the reduction in the recharge of polluted groundwater will reduce the hydraulic gradient of groundwater, thereby slowing down the flow rate of polluted groundwater and buying time for pollution emergency control. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 This is a system diagram of the underground-surface joint control system for water pollution in an embodiment of the present invention when it is applied to low mountain and hilly areas; DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The purpose of the present invention is to provide an underground and surface joint control system and method for water pollution, so as to solve the problems existing in the prior art, and coordinate the blocking interception area, the source reduction control area and the groundwater level control area, so as to realize the control of both groundwater and surface water, and improve the control effect.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Please refer to Figure 1 As shown, an underground and surface joint control system for water pollution is provided, including a blocking interception area for pumping polluted groundwater, a source reduction and feather control area for weakening the non-Fickian dispersion of polluted groundwater, and a groundwater level control area for lowering the polluted groundwater level to below the riverbed. The blocking interception area and the source reduction and feather control area are both arranged on the flow path of the polluted groundwater. The area where the polluted groundwater flows is the pollution area. The groundwater level control area is the concentrated discharge area for the polluted groundwater to flow to the surface water. The blocking interception area, the source reduction and feather control area, and the groundwater level control area are respectively provided with a plurality of groundwater wells. The main purpose of setting each area is to use the groundwater wells in the blocking interception area to pump the polluted groundwater. Groundwater extraction plays the role of blocking and intercepting the migration of pollutants to the downstream. In conjunction with the groundwater wells in the source control area, the non-Fickian dispersion characteristics of the contaminated groundwater are weakened by pumping water, which can achieve a good control effect on the contaminated groundwater. At the same time, through the groundwater wells in the groundwater level control area, the water level of the contaminated groundwater below the concentrated discharge area of ​​the surface water is lowered to below the riverbed, preventing the contaminated groundwater from being discharged to the surface water, thereby improving the control effect on the surface water. At the same time, after controlling the groundwater level in the groundwater level control area, there is no need to set up pumping and purification equipment at the surface water in the groundwater level control area, thereby reducing the amount of sewage pumping and purification.

[0028] The existence of high-concentration contamination zones and contamination clusters in groundwater due to the non-Fickian dispersion characteristics in heterogeneous aquifers is the cause of tailing and rebound phenomena during extraction, treatment and remediation. Therefore, groundwater wells need to be set up as densely as possible in the source control plume area.

[0029] The contaminated groundwater extracted from the interception area, source reduction and feather control area and groundwater level control area is connected to the sewage treatment station through a transmission pipeline. The sewage treatment station will treat the contaminated groundwater and then discharge it.

[0030] In this embodiment, a clean water interception area for extracting clean groundwater is also provided. The clean water interception area is set upstream of the flow path of the polluted groundwater. If there is a pollution source upstream of the flow path of the polluted groundwater, the clean water interception area is set upstream of the pollution source. A plurality of groundwater wells are set in the clean water interception area. The setting of the groundwater wells in the clean water interception area can extract uncontaminated clean water for direct use, thereby realizing the separation of clean and polluted water. The clean water can be used by enterprises under construction near the polluted area, and the extracted clean groundwater can be used as their production water. At the same time, the amount of clean water entering the polluted groundwater is reduced, and the pressure of sewage back-pumping and purification in the blocking interception area, the source reduction and feather control area, and the groundwater level control area is reduced. At the same time, the reduction in the recharge of polluted groundwater will reduce the hydraulic gradient of the groundwater, thereby slowing down the flow rate of the polluted groundwater, and buying time for pollution emergency control.

[0031] In this embodiment, the depth of the groundwater wells in the blocking and intercepting area, the source cutting and feather control area, the groundwater level control area and the clean water intercepting area penetrates the bottom plate of the aquifer and enters the weakly weathered bedrock. Submersible pumps for pumping water are provided in the groundwater wells, and the submersible pumps are connected to the sewage treatment station through a delivery pipeline.

[0032] The well pipes of groundwater wells in the blocking and intercepting areas, source reduction and feather control areas, groundwater level control areas and clean water intercepting areas include filter pipes and solid pipes arranged at both ends of the filter pipes. The filter pipes are arranged corresponding to the groundwater aquifers. The filter pipes can filter dirt to prevent blockage of the submersible pump and ensure the normal operation of the submersible pump.

[0033] In order to further prevent polluted groundwater from polluting surface water, in this embodiment, a surface water diversion area is provided to provide a flow path for surface rivers. The surface water diversion area and the groundwater level control area are staggered. The surface water diversion area is provided with a river flow channel, that is, the inlet end of the river flow channel in the surface water diversion area is located upstream of the starting section of the groundwater level control area (that is, the starting section of river water pollution). The river path and the polluted groundwater are staggered to the concentrated discharge area of ​​surface water by diversion. After the surface water diversion area is set, the groundwater level control area can be used as a monitoring area for whether the polluted groundwater is discharged.

[0034] In order to reduce the number of groundwater wells and achieve effective extraction of contaminated groundwater, the interception area is set in the narrow section of the contaminated groundwater flow path.

[0035] A plurality of groundwater wells arranged in rows are arranged in the blocking and intercepting area. The arrangement direction of the plurality of groundwater wells is perpendicular to the flow direction of the polluted groundwater, so as to realize the effective blocking of the polluted groundwater. At the same time, the vertical arrangement also makes it possible to detect the concentration of pollutants in the polluted groundwater while drilling the plurality of groundwater wells in the arrangement direction. After the drilling is completed, it is determined according to the detected concentration information which part of the plurality of groundwater wells has the corresponding part of the polluted groundwater concentration exceeding the standard. The position exceeding the standard is used as the working well, and the position not exceeding the standard is used as the non-working well. The position exceeding the standard is located on the flow path of the polluted groundwater, and the position not exceeding the standard is located outside the polluted groundwater path. When pumping water, the non-working wells do not need to work, so as to save costs.

[0036] When setting up a row of groundwater wells, pollutants may escape through the strong runoff zone between the wells. Therefore, multiple rows of groundwater wells are set in the blocking and interception area, and the groundwater wells between adjacent rows are staggered to achieve effective blocking and interception of pollutants.

[0037] In this embodiment, multiple source feather reduction control areas are set, and the multiple source feather reduction control areas are evenly distributed on the flow path of the contaminated groundwater. When three source feather reduction control areas are set, the three source feather reduction control areas are respectively located in the upstream, midstream and downstream of the flow path of the contaminated groundwater.

[0038] The source reduction feather control zone does not need to be in the started state all the time. The pollutant concentration in the contaminated groundwater corresponding to the source reduction feather control zone can be tested daily through the groundwater wells in the source reduction feather control zone. When the concentration exceeds the standard, the groundwater wells in the source reduction feather control zone can be started to pump water. When the concentration does not exceed the standard, the groundwater wells in the source reduction feather control zone can be stopped and pumping can be continued. When multiple source reduction feather control zones are set up, testing can be carried out in the source reduction feather control zone adjacent to the groundwater level control zone. If the test exceeds the standard, multiple groundwater wells in the source reduction feather control zone will be started. If the test does not exceed the standard, the groundwater wells in the source reduction feather control zone can be stopped. Regardless of the number of source reduction feather control zones set up, it is necessary to ensure at least one test per day to facilitate timely control of the groundwater wells in the source reduction feather control zone.

[0039] In this embodiment, the power of the submersible pump of the corresponding groundwater well is adjusted according to the collected pollutant concentration.

[0040] The present invention also provides an underground-surface joint control method for water pollution, which uses the above-mentioned underground-surface joint control system for water pollution, and includes the following steps:

[0041] S1: Groundwater wells are laid out in the interception and interception areas, source reduction and plume control areas, and groundwater level control areas;

[0042] S2: Monitor the vertical stratified pollutant concentration of groundwater in the well (pollutant concentration in the upper, middle and lower layers), and use large flow and large drawdown continuous pumping to lower the groundwater level to below the polluted layer. The groundwater level in the corresponding groundwater level control area must be guaranteed to be lowered below the water bed;

[0043] S3: The extracted polluted water is transported to the sewage treatment plant for treatment.

[0044] In the present invention, the pollutant concentration is obtained by sampling and testing using a Baylor tube.

[0045] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0046] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An underground and surface joint control system for water pollution, characterized in that: It includes a blocking and intercepting area for pumping out contaminated groundwater, a source reduction and feather control area for weakening the non-Fickian dispersion of contaminated groundwater, and a groundwater level control area for lowering the contaminated groundwater level to below the riverbed. The blocking and intercepting area and the source reduction and feather control area are both arranged on the flow path of the contaminated groundwater. The groundwater level control area is a centralized discharge area for contaminated groundwater flowing to surface water. The blocking and intercepting area, the source reduction and feather control area, and the groundwater level control area are respectively provided with a plurality of groundwater wells.

2. The underground and surface joint control system for water pollution according to claim 1 is characterized in that: The underground and surface joint control system for water pollution also includes a clean water interception area for extracting clean groundwater. The clean water interception area is arranged upstream of the flow path of the polluted groundwater and is provided with multiple groundwater wells.

3. The underground and surface joint control system for water pollution according to claim 2 is characterized in that: The depths of the groundwater wells in the blocking and intercepting area, the source cutting and feather control area, the groundwater level control area and the clean water intercepting area penetrate the bottom plate of the aquifer and enter the weakly weathered bedrock, and submersible pumps for pumping water are provided in the groundwater wells.

4. The underground and surface joint control system for water pollution according to claim 3 is characterized in that: The well pipes of the groundwater wells in the blocking and intercepting area, the source reduction and feather control area, the groundwater level control area and the clean water intercepting area include a filter pipe and solid pipes arranged at both ends of the filter pipe, and the filter pipe is arranged corresponding to the groundwater aquifer.

5. The underground and surface joint control system for water pollution according to claim 1 is characterized in that: The underground and surface joint control system for water pollution also includes a surface water diversion area that provides a flow path for surface rivers. The surface water diversion area is staggered with the groundwater level control area, and the surface water diversion area is provided with a river flow channel.

6. The underground and surface joint control system for water pollution according to claim 1 is characterized in that: The blocking and intercepting area is arranged in a narrow section of the contaminated groundwater flow path.

7. The underground and surface joint control system for water pollution according to claim 1 is characterized in that: A plurality of groundwater wells arranged in a row are arranged in the blocking and intercepting area, and the arrangement direction of the plurality of groundwater wells is perpendicular to the flow direction of the contaminated groundwater.

8. The underground and surface joint control system for water pollution according to claim 7 is characterized in that: A plurality of rows of groundwater wells are arranged in the blocking and intercepting area, and the groundwater wells in adjacent rows are staggered.

9. The underground and surface joint control system for water pollution according to claim 1 is characterized in that: There are multiple source reduction feather control areas, and the multiple source reduction feather control areas are evenly distributed on the flow path of the contaminated groundwater.

10. A method for underground and surface joint control of water pollution, characterized in that: The underground-surface joint control system for water pollution as claimed in any one of claims 1 to 9 comprises the following steps: S1: Groundwater wells are laid out in the interception and interception areas, source reduction and plume control areas, and groundwater level control areas; S2: Monitor the concentration of pollutants in the vertical stratification of groundwater in the well, and pump water to lower the groundwater level to below the contaminated layer. The groundwater level in the corresponding groundwater level control area must be guaranteed to be lowered below the water bed; S3: The extracted polluted water is transported to the sewage treatment plant for treatment.

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