CN-122013849-A - Shore filtering system and method based on inclined water intake well

CN122013849ACN 122013849 ACN122013849 ACN 122013849ACN-122013849-A

Abstract

The application discloses a shore filtering system and a shore filtering method based on an inclined water taking well. The shore filtration system is suitable for underground water taking in a karst landform area and comprises a filter layer, a first water-bearing layer, an optional at least one second water-bearing layer and an inclined water taking well, wherein the filter layer comprises natural sediments and/or artificial reinforcing mediums of a surface water shore, the first water-bearing layer is formed by performing shore filtration on the surface water by the filter layer, the optional at least one second water-bearing layer is spatially positioned below the first water-bearing layer, the inclined water taking well extends towards the filter layer at an angle of more than 0 DEG and less than 90 DEG between a shaft axis and the horizontal direction, and a water taking section of the water taking well penetrates or extends into a water-rich section of the first water-bearing layer and the optional at least one second water-bearing layer from the shore filtration. According to the application, by introducing the inclined water taking well, the horizontal projection length of the water taking well is prolonged, the water collecting area and the effective water inlet section are obviously increased, and the collection of more shore filtered water from the side percolation of the surface water shore is facilitated.

Inventors

QI WEIXIAO
ZHAO JIAN
HU BIN
JIAO HENG
LI XIAOMING
Ji Qinkebuzi

Assignees

清华大学

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. A shore filtration system based on an inclined water intake well, wherein the shore filtration system is suitable for underground water intake in karst landform areas, comprising: A filter layer comprising natural sediment and/or artificial enhancement media of the surface water bank; a first aquifer formed by shore-filtering surface water by the filter layer; Optionally at least one second aquifer spatially below the first aquifer; The water intake section of the water intake well penetrates or stretches into the water-collecting section of the first water-bearing layer and the optional at least one second water-bearing layer from the shore filter.
2. The shore filtration system of claim 1, wherein said second aquifer is selected from any one or more of an interstitial aquifer, a bedrock fracture aquifer; optionally, when a plurality of second aquifers are present, each of the plurality of second aquifers is independently any one selected from the group consisting of an porous aquifer, a bedrock fracture aquifer, and/or According to the fracture cause classification, the bedrock fracture aquifer is selected from any one or more of a structural fracture aquifer, a weathered fracture aquifer and a diagenetic fracture aquifer, and/or When the at least one second aquifer exists, the second aquifer is communicated or not communicated with the first aquifer, and a plurality of second aquifers are communicated or not communicated.
3. The shore filtration system of claim 1, wherein when at least one second aquifer is present and the water intake section of said water intake well passes through or into the water intake section of said first aquifer from the shore filtration and said at least one second aquifer, the relative positions of said first aquifer and said at least one second aquifer satisfy that the water intake section of said first aquifer and said at least one second aquifer is available for the inclined water intake well to extend obliquely at a set angle.
4. The shore filter system according to claim 1, wherein when the target aquifer is located within the range of the ecological red line, the wellhead of said inclined water intake well is disposed outside the ecological red line away from the shore of the surface water, and said inclined water intake well extends from the wellhead towards said filter layer at an angle of the shaft axis to the horizontal of more than 0 ° and less than 90 °, the water intake section of said water intake well passing through or extending into the water-extractable section of said first aquifer and optionally at least one second aquifer from the shore filter located within the range of the ecological red line; Optionally, the wellhead of the inclined water intake well is arranged at a position which is outside ecological infrared rays and is close to ecological red rays.
5. The shore filter system according to claim 1, wherein the direction of the inclined water intake well and the angle of the shaft axis to the horizontal are designed according to the principle comprising: Determining the direction of the inclined water intake well and the angle formed by the shaft axis and the horizontal direction according to the wellhead position of the inclined water intake well, the positions of the recoverable water-rich sections of the first water-bearing layer and the optional second water-bearing layer, so that the inclined water intake well passes through or stretches into the recoverable water-rich sections of the first water-bearing layer and the optional second water-bearing layer from the wellhead position as long as possible; optionally, the angle of the shaft axis of the inclined water intake well forms an angle of 8 ° to 80 °, optionally 8 ° to 20 °,20 ° to 30 °,30 ° to 40 °, 40 ° to 50 °, 50 ° to 60 °, 60 ° to 70 °, or 70 ° to 80 °, with the horizontal direction.
6. The shore filter system according to any one of claims 1 to 5, wherein the surface water is selected from any one of a river, a lake, a reservoir, and/or Geometrically classifying said first and at least one second aquifer from a shore filter as selected from any one or more of lenticular, banded, saccular, meshed, cut, lamellar or thick lamellar, and/or The filter layer comprises at least one of natural soil layer, sand layer, gravel-containing sand layer, and gravel layer, optionally comprises natural soil layer, sand layer, and gravel-containing sand layer, and/or The filter layer is selected from at least one of a sand layer and a gravel-containing sand layer which are local in a karst landform region and have thickness and continuity which can meet the filtering requirement; the artificial strengthening medium comprises at least one of graded sand, gravel, activated carbon, zeolite, modified clay, porous ceramic, plastic filler, zero-valent iron and slow-release carbon source, and/or The inclined water intake well is positioned at the water intake section of the first water-bearing layer and is completely deployed at a natural sediment layer or a manually enhanced filter layer with strong purification capability.
7. The shore filter system according to any of claims 1 to 5, wherein said inclined water intake well comprises: the well fixing pipe is arranged on the outermost layer of the upper part of the inclined water taking well body; the well forming pipe is arranged in the middle layer of the inclined water taking well body and is connected with the screen pipe; at least one section of sieve tube, wherein each section of sieve tube is respectively arranged on a first water-bearing layer and optionally at least one second water-bearing layer of the shore filter system; The water taking device is arranged in the shaft; optionally, the water intake device comprises a water pump, a water outlet pipe connected with the water pump, and a power system for controlling the operation of the water pump.
8. The shore filter system according to any of claims 1 to 5, wherein said shore filter system based on an inclined water intake well further comprises a monitoring control unit comprising: the monitoring module is used for collecting water quality parameters and/or hydrologic data of water taken by each aquifer in the water taking well, wherein the water quality parameters comprise at least one of turbidity, pH value and dissolved oxygen, and the hydrologic data comprise at least one of water level and water taking flow; the control module is in communication connection with the monitoring module and the water taking device, and is used for receiving and analyzing the data acquired by the monitoring module, generating and sending an instruction for controlling the water taking rate or the start-stop state to the water taking device based on the analysis.
9. The shore filter system according to claim 1, wherein said shore filter system is adapted for underground water intake in karst landform areas, comprising: The filter layer comprises a fourth series loose layer consisting of a soil layer, a fine sand layer and a gravel-containing sand layer; The first aquifer is formed by carrying out shore filtration on surface water by the filter layer, and is positioned in a fine sand layer and/or an aquifer containing gravel sand layer in a fourth system loose layer in an ecological red line; the second aquifer is spatially positioned below the first aquifer and is a crack and a structural crack aquifer between layers of dwarf type self-flowing well group and tri-stack type two-bridge group clastic rock; The well head sets up in ecological infrared, the slope water intake well, the angle that the well head was greater than 0 and is less than 90 with pit shaft axis and horizontal direction contained angle is extended by the well head to the filter layer, water intake section of water intake well stretches into from bank filtration the water section can be adopted of first aquifer.
10. A shore filtering method based on an inclined water intake well, characterized in that it uses the shore filtering system according to any one of claims 1 to 9, suitable for underground water intake in karst landform areas, comprising: Collecting water in the water-rich section of the first aquifer and optionally at least one second aquifer from the shore filter through the water intake section of the inclined water intake well in the shore filter system and taking out through a water intake device; And the water quality parameters and/or hydrologic data of the inclined water intake well are collected through the monitoring control unit, and the starting and stopping states, water intake rates and/or water intake proportions of different water-bearing layers of the water intake device are adjusted.

Description

Shore filtering system and method based on inclined water intake well Technical Field The invention relates to the technical field of water treatment, in particular to a shore filtering system and a method based on an inclined water taking well. Background Bank Filtration (Bank Filtration) is a process that uses the soil and sediment layer of river or lake as natural filter to make the surface water permeate and flow through the natural filter under the drive of natural hydraulic gradient, and finally extracts the water purified by physical, chemical and biological actions. Karst landforms mainly comprise carbonate rocks (such as limestone and dolomite), and have strong karst action to form a large number of karst cave, pipeline and fracture networks. The karst region has the characteristics of thin soil layer, strong rock leakage, rapid infiltration of precipitation, rapid groundwater flow speed, complex flow state, extremely uneven spatial distribution of aquifers, great difficulty in searching and exploiting engineering, high cost, rapid surface water leakage and difficult underground water deep reservoir exploitation, and meanwhile, the problems of rapid loss of more precipitation in rainy seasons and rapid seasonal water shortage of dry season surface water source depletion, and in addition, surface pollutants are easy to directly enter the groundwater through karst pipelines or large-scale cracks, so that 'short-path' pollution is caused, and the water quality safety risk is high. In addition, the ecological red line policy of China clearly limits or prohibits engineering construction activities in key water source conservation areas, water and soil conservation key areas and the like. The ecological red line is mostly positioned in the sensitive area and the fragile area of the water source area, engineering approval is complex in the range, and limiting conditions are many, so that the traditional water taking method is extremely inapplicable in the range of the ecological red line, and many areas with better hydrogeological conditions cannot be directly developed and utilized, so that the contradiction between the supply and demand of local water resources and the difficulty of water taking engineering implementation are further increased. Therefore, in karst landform areas, conventional shore filtration technology and conventional water intake methods face serious challenges, and there is an urgent need for a water intake technology with high system stability and high purification efficiency. Disclosure of Invention The embodiment of the application provides a bank filtering system and a bank filtering method based on an inclined water taking well, which are characterized in that the horizontal projection length of the inclined water taking well is prolonged by introducing the inclined water taking well, so that the water collecting area and the effective water inlet section are obviously increased, more bank filtered water from the side infiltration of the surface water bank is facilitated to be collected, meanwhile, when the inclined water taking well passes through a plurality of aquifers including a bank filtered aquifer and an aquifer positioned below the bank filtered aquifer, the bank filtered water can be collected more, heterogeneous groundwater can be effectively converged, the effect of increasing the water taking amount and optimizing the water source proportion is realized, the stability and the purification efficiency of the water taking system can be effectively improved, and the bank filtering system is particularly suitable for complex hydrogeological conditions such as karst landform and the like. In a first aspect, an embodiment of the present application provides a shore filtration system based on an inclined water intake well, where the shore filtration system is suitable for underground water intake in a karst landform area, and includes: A filter layer comprising natural sediment and/or artificial enhancement media of the surface water bank; a first aquifer formed by shore-filtering surface water by the filter layer; Optionally at least one second aquifer spatially below the first aquifer; The water intake section of the water intake well penetrates or stretches into the water-collecting section of the first water-bearing layer and the optional at least one second water-bearing layer from the shore filter. In a second aspect, an embodiment of the present application provides a shore filtering method based on an inclined water intake well, where the shore filtering method uses the shore filtering system of the first aspect, and is suitable for underground water intake in karst landform areas, and the method includes: Collecting water in the water-rich section of the first aquifer and optionally at least one second aquifer from the shore filter through the water intake section of the inclined water intake well in the shore filter system and taking out through a water intake de