CN211421243U

CN211421243U - Groundwater overflow supply recharge system that irrigates channel and irritates well combination

Info

Publication number: CN211421243U
Application number: CN201922023672.5U
Authority: CN
Inventors: 陈学群; 李福林; 刘丹; 田婵娟; 王爱芹; 管清花
Original assignee: Water Resources Research Institute of Shandong Province
Current assignee: Water Resources Research Institute of Shandong Province
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-09-04
Anticipated expiration: 2029-11-21

Abstract

The utility model relates to a groundwater recharge system that irrigates ditch and irritate well combination, its characterized in that cross flows: set up dive aquifer recharge well (21) in weakly permeable stratum (4), dive aquifer recharge well (21) is at first strainer (10) of dive aquifer (3) installation, first strainer (10) upper portion sets up impervious first casing pipe (9) to ground (1), build irrigation canal (32) near dive aquifer recharge well (21), irrigation canal (32) get into dive aquifer recharge well (21) through water delivery corridor (17), set up corresponding dive monitoring well (22) and confined water monitoring well (23) respectively to dive and confined water. The utility model discloses not only realize the supply of each other between surface water and the groundwater, still utilize the weak permeable stratum to realize the cross-layer overfall supply of secret aquifer, practiced thrift the recharge cost. And the collection and filtration of surface water resources such as rain, flood and the like by the irrigation channel are utilized, so that the quality of the recharge water is ensured.

Description

Groundwater overflow supply recharge system that irrigates channel and irritates well combination

Technical Field

The utility model relates to a hydrogeology, groundwater science technical field especially relate to a groundwater aquifer groundwater recharge scheme that flows more, mainly is a recharge lower part confined aquifer's the replenishment system that flows more indirectly that irrigates the ditch and irritates the well combination.

Background

With the continuous development of social economy, in recent years, the exploitation amount of underground water is continuously increased, so that the underground water level is continuously reduced, underground water funnel areas are formed at different water-containing layers, and a series of environmental geological problems such as ground settlement, ground collapse, salt water invasion and the like are caused. The main reason for ground settlement is that the compression of water release of the soil framework of the aquifer caused by excessively pumping the groundwater is caused, the soil framework of the aquifer rebounds after being filled with water by recharging the groundwater aquifer, the purpose of controlling the ground settlement is achieved, and therefore the groundwater artificial recharging technology is provided.

The groundwater artificial recharge technology is to supplement groundwater by injecting surface water or water from other water sources into the ground by adopting artificial measures, aims to supplement groundwater water quantity, and is an effective means for relieving or preventing environmental and geological problems such as ground settlement, groundwater salt water invasion and the like. At present, the direct recharge method used in large quantities at home and abroad mainly comprises a ground infiltration method and a pipe well injection method, wherein the ground infiltration method is to utilize ground water collection engineering facilities such as natural depression, riverbed, channel and the like and make the ground water collection engineering facilities leak naturally and supply a aquifer by means of the natural water head difference between surface water and underground water, the method can fully utilize natural conditions and obtain larger infiltration amount with less investment, but the method is difficult to meet the requirement that a recharge water source reaches a deep aquifer; the pipe well injection method is a manual recharging method for directly injecting water source into underground target aquifer through drilling, vertical shaft and other facilities, and the method occupies less land and is not easily influenced by factors such as ground climate change and the like. The reasonable and effective recharge scheme can ensure that infiltration and replenishment are fast, the water supply amount is uniformly distributed in a large area, the engineering investment and the operation management cost are low, and the method is simple and easy to implement. Although the artificial groundwater recharge is widely applied, a reasonable recharge scheme, the reduction of recharge cost and the like still remain technical problems to be solved urgently in the field of the artificial groundwater recharge.

Disclosure of Invention

At present, the traditional artificial recharge and supply of underground water are mainly concentrated on deep confined aquifers, namely deep aquifers are supplied in a recharge well mode aiming at corresponding recharge layers, but the artificial recharge mode of the underground water of the deep aquifers has the problems of long construction time, large capital investment and the like, and the cost is high if all layers are recharged. The cross-flow replenishment is one of the sources of groundwater, and the water head difference of the natural aquifer is a necessary condition of the cross-flow replenishment, so that the water level of an upper aquifer can be replenished, and the lower aquifer is replenished through the cross-flow effect of the weakly permeable stratum, thereby realizing interlayer recharge between the aquifers.

The problem of above the comprehensive consideration, the utility model provides a groundwater supply system that flows more that irrigation canal that realizes aquifer interlayer recharge irritates well and combines together to carry out detailed explanation to this system. The system utilizes the permeable advantage of the weakly permeable stratum and the connectivity of the weakly permeable stratum between two aquifers to recharge the recharge water source to the upper submerged aquifer through the irrigation canal or the shallow recharge well, so that the water level of the submerged groundwater rises, the recharge water source enters the lower confined aquifer after passing through the weakly permeable stratum, and the cross-flow recharge replenishment of deep confined water is realized. Because of the diversity of the recharging water sources, the utility model provides a recharging mode combining the canal and the recharging well, the externally-adjusted water source which meets the requirement of the recharging water quality can be directly recharged to the diving aquifer through the recharging well; the irrigation canal can effectively collect surface water resources such as rain flood resources, river inflow and the like, the filtering layer at the bottom of the irrigation canal can effectively improve the quality of the recharge water, and the filtered surface water enters the recharge well through the water delivery gallery connected with the irrigation well and the irrigation canal and then reaches the diving aquifer. The method of combining the canal and the well can effectively improve the recharge quantity and ensure the water quality safety. The aquifer overflow supply system is convenient to apply, saves cost, and can be selectively used according to different hydrogeological characteristics.

The utility model relates to a groundwater recharge system that irrigates well combination flows more of irrigation ditch, according to lithology and groundwater occurrence condition, the groundwater aquifer can divide into dive aquifer, weak permeable stratum and the confined aquifer of fourth system, because there is certain hydraulic linkage between dive aquifer and the confined aquifer and leads to vertical replenishment ability of flowing more stronger. The cross-flow supply system is provided with an irrigation canal, a recharge well and a monitoring well, the recharge well uncovers a weak permeable layer top plate, a water filter pipe is arranged corresponding to a diving aquifer, and the water filter pipe is slightly larger than the thickness of the diving aquifer, so that the recharge efficiency can be improved; the irrigation canal communicated with the irrigation well is arranged through the gallery and mainly comprises an upper filter material layer and a lower geotextile filter layer.

The utility model discloses a concrete implementation scheme is: the utility model provides a groundwater of irrigated channel well combination supply recharge system that flows more, this system is applicable to the stratum condition that weak permeable stratum exists, lays according to geology, hydrogeological condition, according to the hydrogeological condition in the recharge area, groundwater divides into: dive, half confined water and confined water, wherein there is certain water conservancy relation between dive aquifer and the half confined aquifer, and the lithology and the thickness of plough layer, dive aquifer, weak water layer, the each layer of half confined aquifer are confirmed respectively to the stratum information of coring according to the drilling and are obtained, and the dive aquifer is drained, and groundwater level is located below the roof of half confined aquifer, its characterized in that: set up dive aquifer recharging well in the recharge area that weak permeable stratum exists, dive aquifer recharging well is including first casing pipe, first strainer, first clay ball and first filter material, dive aquifer recharging well is at the corresponding first strainer of direct recharge aquifer position installation of dive aquifer, the recharge water source can directly get into dive aquifer, wherein the length of first strainer is greater than the dive aquifer thickness of direct recharge aquifer, effectively improve the recharge ability, first strainer and dive aquifer recharging wellA first filter material is arranged between the well walls; a first water-tight casing pipe is arranged from the upper part of the first water filter pipe to the ground,first of allA first clay ball is arranged between the well wall pipe and the well wall of the diving aquifer recharging well; the diameter of the submersible aquifer recharge well is between 160 and 180mm, and the diameters of the first water filtering pipe and the first casing pipe are between 110 and 125 mm; because of the direct connection between the recharging well and the aquifer, the recharging water source with the water quality meeting the recharging requirement firstly passes through the first filter pipe of the recharging well, and the first filter material filled between the first filter pipe and the diving aquifer has larger permeability and then reaches the direct recharging aquifer, namely the diving aquifer; the irrigation canal has the functions of collecting rain flood resources, riverway incoming water and the like, the irrigation canal is built near the submerged aquifer recharging well, the irrigation canal is built by using a concrete baffle, the irrigation canal is provided with a coarse filter material layer, a fine filter material layer and a filter nylon cloth, and a surface recharging water source respectively enters the submerged aquifer recharging well through a water delivery corridor after being subjected to the early-stage filtering function of the coarse filter material layer and the fine filter material layer on the upper layer of the irrigation canal and further purified by the filter nylon cloth. After the recharging water source reaches the diving water-bearing layer, the groundwater level is greatly lifted after recharging and forms a water filling funnel to generate a water head difference, the weak permeable layer has certain permeability, the groundwater in the diving water-bearing layer enters the lower semi-confined water-bearing layer through the weak permeable layer under the action of water pressure, and the diving water-bearing layer recharging well is connected with the recharging water source for water body exchange directly.

Respectively establishing a corresponding diving monitoring well and a corresponding confined water monitoring well aiming at the diving water and the confined water, wherein the well diameters are both 125mm, a second water filtering pipe is arranged at a diving aquifer of the diving monitoring well, a second filter material is filled between the second water filtering pipe and the diving aquifer, a watertight second well wall pipe is arranged from the upper part of the second water filtering pipe to the ground, and a second clay ball is arranged between the second well wall pipe and the well wall of the diving monitoring well; and a third filter pipe is arranged on a semi-confined aquifer of the confined water monitoring well below the weakly permeable stratum, a third filter material is filled between the third filter pipe and the submerged aquifer, a watertight third well wall pipe is arranged from the upper part of the third filter pipe to the ground, and a third clay ball is arranged between the third well wall pipe and the wall of the confined water monitoring well.

The groundwater recharge-based submerged aquifer overflow replenishment system is mainly characterized by comprising a stratum condition and a recharge device, wherein a recharge water source is connected with a weak permeable layer between a pressure-bearing aquifer through the submerged aquifer according to geological and hydrogeological characteristics of a recharge area; the technical core of the multi-layer aquifer overflowing supply scheme based on groundwater recharge is to solve the problem of overflowing supply of a deep aquifer by using a shallow irrigation canal irrigation well, a recharge water source is connected with a diving aquifer through the irrigation canal irrigation well, and the recharge water source enters the diving aquifer and then enters a lower confined aquifer through a weak permeable stratum. Generally, the groundwater aquifer overflowing supply scheme based on groundwater recharge mainly comprises recharge supply and underground overflowing supply.

The advantages of the utility model

The utility model has the advantages of it is following:

1. the recharge system not only realizes mutual replenishment between surface water and underground water, but also realizes cross-layer overflow replenishment of underground aquifers by utilizing the weak permeable stratum.

2. This recharge system makes the rapid rise of diving aquifer water level through artifical supply groundwater, and the poor increase of flood peak makes the recharge water source easily supply the confined aquifer downwards through the weak permeable stratum.

3. The recharge system forms a water filling funnel for groundwater in the recharge process of the diving aquifer, and compared with deep recharge through a recharge well, the recharge system effectively increases the recharge area.

4. The recharging system adopts a recharging mode of combining the irrigation channel and the irrigation well, and utilizes the collecting effect and the filtering effect of the irrigation channel on surface water resources such as rain, flood and the like, so that the recharging amount is effectively increased and the recharging water quality is ensured.

5. Through cross-layer cross-flow supply, the recharge water source enters the confined aquifer after passing through the weakly permeable layer, and the weakly permeable layer has a certain filtering effect and guarantees the safety problem of the recharge water quality to a higher degree.

6. The recharging well in the recharging system does not need to uncover a target recharging layer, and the deep confined aquifer is replenished by recharging the shallow aquifer, so that the recharging cost is greatly saved.

Drawings

FIG. 1 is a schematic illustration of an aquifer structure;

fig. 2 is a schematic structural diagram of the present invention.

In the figure, 1, the ground, 2, a plough layer, 3, a diving aquifer, 4, a weak permeable layer, 5, a semi-confined aquifer, 6, a impermeable layer top plate, 7, an original underground water level, 8, a recharge water source, 9, a first well wall pipe, 10, a first filter pipe (with a 60-mesh filter screen), 11, a first clay ball, 12, a first filter material (with a grain diameter of 0.4-0.6 cm), 13, a concrete baffle, 14, a coarse filter material layer (with a grain diameter of 2-3 cm), 15, a fine filter material layer (with a grain diameter of 1-2 cm), 16, a filter nylon cloth, 17, a water delivery gallery, 18, a recharge underground water level, 19, a water flow direction, 20, a top plate, 21, a diving aquifer recharge well, 22, a diving monitoring well, 23, a confined water monitoring well, 24, a second filter pipe, 25, a second filter material, 26, a second well wall pipe, 27, a second filter ball, 28 and a third filter pipe, 29. a third filter material, 30, a third well wall pipe, 31 and third clay balls.

Detailed Description

The utility model discloses a multilayer aquifer replenishment scheme that flows more based on groundwater recharge, it is right to combine the embodiment below the utility model discloses do further detailed description.

Referring to the attached drawings, the system is suitable for the stratum conditions existing in a weak permeable stratum, is arranged according to geological and hydrogeological conditions, and is divided into underground water according to the hydrogeological conditions in a recharge area: dive, half confined water and confined water, wherein there is certain water conservancy relation between dive aquifer and the half confined aquifer, the lithology and the thickness of each layer of stratum 2, dive aquifer 3, weak water permeability layer 4, the 5 layers of half confined aquifer are confirmed respectively to the stratum information of coring according to the drilling and are obtained, dive aquifer 3 is dredged, and groundwater level 7 is located below the roof 20 of half confined aquifer 5, its characterized in that: the submerged aquifer recharging well 21 is arranged in a recharging area where the weakly permeable stratum 4 exists, the submerged aquifer recharging well 21 comprises a first well wall pipe 9, a first water filtering pipe 10, a first clay ball 11 and a first filtering material 12, and the submerged aquifer recharging well 21 corresponds to the submerged aquifer 3The first water filter pipe 10 is arranged at the position of the direct recharge aquifer, a recharge water source 8 can directly enter the diving aquifer 3, wherein the length of the first water filter pipe 10 is larger than the thickness of the diving aquifer 3 of the direct recharge aquifer, the recharge capability is effectively improved, and a first filter material 12 is arranged between the first water filter pipe 10 and the well wall of the diving aquifer recharge well 21; a water-tight first casing pipe 9 is arranged from the upper part of the first water filter pipe 10 to the ground 1,first of allA first clay ball 11 is arranged between the well wall pipe 9 and the wall of the diving aquifer recharging well 21; the diameter of the submersible aquifer recharge well 21 is between 160 and 180mm, and the diameters of the first water filter pipe 10 and the first casing pipe 9 are between 110 and 125 mm; because of the direct connection between the recharging well and the aquifer, the recharging water source 8 with the water quality meeting the recharging requirement firstly passes through the first filter pipe 10 of the recharging well, and the first filter material 12 filled between the first filter pipe 10 and the diving aquifer 3 has larger permeability and then reaches the direct recharging aquifer, namely the diving aquifer 3; the irrigation canal has the functions of collecting rain flood resources, incoming water from a river channel and the like, the irrigation canal 32 is built near the submerged aquifer recharge well 21, the irrigation canal 32 is built by using a concrete baffle 13, the irrigation canal 32 is provided with a coarse filter material layer 14, a fine filter material layer 15 and filter nylon cloth 16, and a ground surface recharge water source 8 enters the submerged aquifer recharge well 21 through a water delivery gallery 17 after being respectively subjected to early-stage filtering action of the coarse filter material layer 14 and the fine filter material layer 15 on the upper layer of the irrigation canal 32 and further purified by the filter nylon cloth 16. After the recharging water source 8 reaches the diving water-bearing layer 3, the groundwater level 18 is greatly lifted after recharging and forms a water filling funnel to generate a water head difference, the weakly permeable layer 4 has certain permeability, the groundwater in the diving water-bearing layer 3 enters the lower semi-confined water-bearing layer 5 through the weakly permeable layer 4 under the action of hydraulic pressure, and the diving water-bearing layer recharging well 21 is used for directly connecting the recharging water-bearing layer with the recharging water source 8 for water body exchange.

Respectively establishing a corresponding diving monitoring well 22 and a corresponding confined water monitoring well 23 aiming at the diving water and the confined water, wherein the well diameters are both 125mm, the diving monitoring well 22 is provided with a second water filter pipe 24 at the diving aquifer 3, a second filter material 25 is filled between the second water filter pipe 24 and the diving aquifer 3, a water-tight second well wall pipe 26 is arranged from the upper part of the second water filter pipe 24 to the ground, and a second clay ball 27 is arranged between the second well wall pipe 26 and the well wall of the diving monitoring well 22; the confined water monitoring well 23 is provided with a third water filter pipe 28 in a semi-confined aquifer 5 below the weakly permeable stratum 4, a third filter material 29 is filled between the third water filter pipe 28 and the submerged aquifer 3, a water-tight third well wall pipe 30 is arranged from the upper part of the third water filter pipe 28 to the ground, and a third clay ball 31 is arranged between the third well wall pipe 30 and the wall of the confined water monitoring well 23.

Claims

1. The utility model provides a groundwater of irrigated channel well combination supply recharge system that flows more, this system is applicable to the stratum condition that weak permeable stratum exists, lays according to geology, hydrogeological condition, according to the hydrogeological condition in the recharge area, groundwater divides into: dive, half confined water and confined water, wherein there is certain water conservancy relation between dive aquifer and the half confined aquifer, the lithology and the thickness of each layer of stratum (2), dive aquifer (3), weak permeable bed (4), half confined aquifer (5) are confirmed respectively to the stratum information of coring according to the drilling and are obtained, dive aquifer (3) are dredged, underground water level (7) are located roof (20) below half confined aquifer (5), its characterized in that: a diving aquifer recharging well (21) is arranged in a recharging area where the weak permeable stratum (4) exists, the diving aquifer recharging well (21) comprises a first well wall pipe (9), a first water filtering pipe (10), a first clay ball (11) and a first filtering material (12), the first water filtering pipe (10) is arranged at the position, corresponding to the diving aquifer (3), of the diving aquifer recharging well (21), a recharging water source (8) can directly enter the diving aquifer (3), and the first filtering material (12) is arranged between the first water filtering pipe (10) and the well wall of the diving aquifer recharging well (21); a water-tight first well wall pipe (9) is arranged from the upper part of the first water filtering pipe (10) to the ground (1), a first clay ball (11) is arranged between the first well wall pipe (9) and the well wall of the diving aquifer recharge well (21), an irrigation channel (32) is built near the diving aquifer recharge well (21) by utilizing the effect of the irrigation channel on collecting rain flood resources and river inflow, the irrigation channel (32) is built by utilizing a concrete baffle (13), the irrigation channel (32) is provided with a coarse filter material layer (14), a fine filter material layer (15) and a filter nylon cloth (16), the diving aquifer recharge well (21) is connected through a water delivery gallery (17), a corresponding diving monitoring well (22) and a corresponding confined water monitoring well (23) are respectively built for diving and confined water, the well diameter is 125mm, wherein the second water filtering pipe (24) is arranged at the aquifer (3) of the diving monitoring well (22), and a second water filtering pipe (24) and a second water filtering material (25) are filled between the diving aquifer (3), a water-tight second casing pipe (26) is arranged from the upper part of the second water filtering pipe (24) to the ground, and a second clay ball (27) is arranged between the second casing pipe (26) and the wall of the submersible monitoring well (22); a third water filter pipe (28) is arranged in a semi-confined aquifer (5) of the confined water monitoring well (23) below the weakly permeable stratum (4), a third filter material (29) is filled between the third water filter pipe (28) and the diving aquifer (3), a water-tight third well wall pipe (30) is arranged from the upper part of the third water filter pipe (28) to the ground, and a third clay ball (31) is arranged between the third well wall pipe (30) and the well wall of the confined water monitoring well (23).

2. The groundwater recharge system combining irrigation canals and irrigation wells as claimed in claim 1, wherein: wherein the length of the first water filter pipe (10) is larger than the thickness of the diving water-bearing layer (3) of the direct recharge water-bearing layer.

3. The groundwater recharge system combining irrigation canals and irrigation wells as claimed in claim 1, wherein: the diameter of the submersible aquifer recharge well (21) is between 160 and 180mm, and the diameters of the first water filter pipe (10) and the first casing pipe (9) are between 110 and 125 mm.