NL2030103B1

NL2030103B1 - Staged retaining and storing water supply system for groundwater in hilly regions

Info

Publication number: NL2030103B1
Application number: NL2030103A
Authority: NL
Inventors: Zhou Dankun; Tan Jianmin; Jiang Hua; Liu Yalei; Shi Tingting; Huang Kun; Wang Qing; Li Mengru; Wang Ningtao
Original assignee: Univ China Geosciences; Wuhan Center China Geological Survey Central South China Innovation Center For Geosciences
Priority date: 2021-07-26
Filing date: 2021-12-10
Publication date: 2023-10-09
Also published as: NL2030103A; CN113700098A

Abstract

The present invention relates to a staged retaining and storing water supply system for groundwater in hilly regions. The system includes a retaining and storing dam A disposed on loose accumulations, wherein a ﬁrst water storage bin is disposed in the retaining and storing dam A; there is a seepage channel between the retaining and storing dam A and the ﬁrst water storage bin, and after being retained by the retaining and storing dam A, groundwater in the loose accumulations ﬂows into the ﬁrst water storage bin through the seepage channel; at least one retaining and storing dam B is also disposed downstream of the retaining and storing dam A; and a second water storage bin is disposed in the retaining and storing dam B. The system of the present invention can retain and store a large amount of groundwater for use.

Description

STAGED RETAINING AND STORING WATER SUPPLY SYSTEM FOR

GROUNDWATER IN HILLY REGIONS

TECHNICAL FIELD

[0001] The present mvenlion relates to a water retaining and storing system, in particular to a staged retaining and storing water supply system for groundwater in hilly regions.

BACKGROUND

[0002] Rainfall in the south of China is abundant and mostly concentrated in May to

August. For metamorphic rock low-mountainous and hilly regions in the south, the rainfall 1s difficult to seep and mostly discharged by surface runoff. At the same time, large-scale reservoirs cannot be built in the low-mountainous and hilly regions to retain and store the rainfall and surface water due to topographic restrictions, resulting in the lack of water resources in the vast metamorphic rock low-mountainous and hilly regions, which serjously affects production and hife and restricts economie development In the metamorphic rock low-mountainous and hilly regions, only a small amount of rainfall penetrates a metamorphic rock weathered layer or a residual slope accumulated loose layer, which has a thickness mostiy less than 10 meters and a huge water storage space, and there is pore groundwater mostly, which has a low seepage rate. The rainfall in the south 15 mostly concentrated precipitation, which is difficult to seep in the metamorphic rock regions and is mostly discharged by surface runoff. Only small ponds with most stagnant water, a poor water quality and a small water volume are formed in relatively low-lying locations. Due to a small thickness and poor water abundance of the metamorphic rock weathered layer, the rainfall 18 difficult to collect and use, and cannot be used by residents 10 the low-mountainous and hilly regions where water 15 scarce, which seriously threatens the safety of local drinking water.

SUMMARY

[0003] The technical problem to be solved by the present invention is to provide a staged retaining and storing water supply system for groundwater in hilly regions, which can retain and store a large amount of groundwater for use.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a staged retaining and storing water supply system for groundwater in hilly regions includes a retaining and storing dam A disposed on loose accumulations, wherein a first water storage bin is disposed in the retaining and storing dam A; there is a seepage channel between the retaining and storing dam A and the first water storage bin; groundwater in the loose accumulations is retained by the retaining and storing dam A and then Hows into the first water storage bin through the seepage channel; and

[0005] at least one retaining and storing dam B is further disposed on the loose accumulations and located downstream of the retaining and stoning dam A, and a second water storage bin is disposed in the retaining and storing dam B.

[0006] The present invention has the beneficial effects: the slow seepage groundwater in the loose accumulations is collected and stored in the storage bins by disposing multiple stages of retaining and storing dams, so as to subsequently further utilize water resources; at the same time, a large amount of rainfall is retained by the retaining and storing dams and then seeps into the loose accumulations, and the loose accumulations can be effectively used to store a large amount of water resources, thereby reducing the direct foss of water.

[0007] On the basis of the above technical solution, the present invention may also be improved as follows.

[0008] Further, the retaining and storing dam A and the retaining and storing dam B both penetrate the loose accumulations and extend into a dense weathered layer.

[0009] The beneficial effect of adopting the above further solution 1s that seepage water is mainly stored in the loose accumulations, and the retaining and storing dams extend into the dense weathered layer to strengthen the retaimng of groundwater and reduce the loss,

[0010] Further, a long-term amount of groundwater seepage of a region is calculated based on an area and a thickness of the loose accumulations upstream of the retaining and stoning dam A, a width of the retaining and storing dam A is determined based on the amount of groundwater seepage, and a calculation formula for the amount of groundwater seepage is; =S"HK,

[0011] wherein {2 is the amount of underground water seepage, S 15 an area of a groundwater seepage field, H is an average thickness of the loose accumulations, and K is a moisture content of the Joose accumulations.

[0012] The beneficial effect of adopting the above further solution is that after accurate calculation, the width of the retaining and storing dam is determined to meet local conditions.

[0013] Further, a height of the retaining and storing dam A 1s determined according to topography undulations upstream of the retaining and storing dam A; and

[0014] a height of the retaining and storing dam B is not higher than a water level of the retaining and storing dam A.

[0015] The beneficial effect of adopting the above further solution is that after accurate calculation, the height of the retaining and storing dam is determined to meet local conditions.

[0016] Further, multi-layer filter cloth and a filter mesh interlayer structure are disposed in wall bodies of the retaining and storing dam A and the retaining and storing dam B, and the groundwater is filtered by the filter cloth and the filter mesh interlayer structure and then seeps into the corresponding water storage bins.

[0017] The beneficial effect of adopting the above further solution 1s that the multi-layer filter cloth and the filter mesh structure filter the seepage groundwater, which is conducive to the use of the groundwater in the next step.

[0018] Further, a water storage pipeline is mounted between the first water storage bin and the second water storage bin, and 1s connected to a water pumping device through a water diversion pipe.

[0019] The beneficial effect of adopting the above further solution is that the water storage bing are connected by the water storage pipeline to store part of the water resources, and then the water in a water storage bin 1s pumped through the water pumping device, and can be used by residents for production and life, thereby increasing autilization rate of the water resources.

[0020] Further, an automatic water level monitoring device is mounted in each of the first water storage bin and the second water storage bin.

[0021] The beneficial effect of adopting the above further solution 1s that the automatic water level monitoring devices can constantly monitor water levels in the water storage bins, which is convenient for monitoring and transferring the water resources.

[0022] Further, the seepage channel is close to the bottom of the retaining and storing dam A, and the seepage channel includes a plurality of seepage pipes, wherein a diameter of each seepage pipe is dom to dem.

[0023] The beneficial effect of adopting the above further solution is that due to the seepage pipes, the groundwater 1s conveniently collected and filtered to flow into the first water storage bin.

[0024] Further, an overflow pipe is disposed on the upper pant of the retaining and storing dam A and located outside the retaining and storing dam A, wherein a diameter of the overflow pipe is dem to Gom, and the overflow pipe is used to divert excessive stored water 10 the first water storage bin to the downstream.

[0025] The beneficial effect of adopting the above further solution 1s that due to the overflow pipe located at the upper part of the retaining and storing dam A, the stored water above a designed water level in the first water storage bins diverted to overflow to the downstream, so that the stored water in the first water storage bin is always kept stable.

[0026] Further, each of left side walls, night side walls, upper walls and lower walls of the retaining and storing dam A and the retaining and storing dam B is a solid sealed structure,

[0027] The beneficial effect of adopting the above further solution 18 that the groundwater retained and stored by the retaining and storing dam A and the retaining and storing dam B can only flow in from inner sides of the retaining and storing dams and flow out from outer sides of the retaining and storing dams, thereby diverting more groundwater to the water storage bins.

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 11s a schematic structural diagram of a specific embodiment of the present mventon.

[0029] Reference signs are as follows:

[0030] ì, dense weathered layer; 2, loose accumulations; 3, retaining and storing dam

A; 4, first water storage bin; 5, filter cloth; 6, filter mesh interlayer structure; 7, retaining and storing dam B; 8, water storage pipeline; 9, water diversion pipe; 10, second water storage bin.

DETAILED DESCRIPTION

[0031] The principles and features of the present invention will be described below in combination with the accompanying drawings. The examples cited are only used to explain the present invention, rather than linuting the scope of the present invention.

[0032] In the descriptions of the present invention, it is to be understood that orientation or positional relationships indicated by the terms "center", "length", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "peripheral direction", etc., are orientation or positional relationships shown on the basis of the drawings, only for the purposes of the ease in describing the present invention and simplification of its descriptions, but not indicating or implying that the specified system or element has to be specifically located, and structured and operated in a specific direction, and therefore, should not be understood as limitations to the present invention.

[0033] In the descriptions of the present invention, uncles otherwise specified, "a plurality of" means at least two, such as two and three.

[0034] In the present invention, unless otherwise specified and limited, the terms "mounted", "connected with each other", "connected to/with", "fixed", etc., need to be broadly understood, for example, connection may be fixed connection, detachable connection or integrated connection; or may be mechanical connection, or electrical connection, or may be direct connection, indirect connection via an intermediation, internal communication of two elements or an interaction relationship of two elements, unless otherwise specified. Those of ordinary skill in the art can understand the specific meaning of the above terms in the present invention in accordance with specific conditions.

[0035] The present application is based on a ramnfall-surface water-groundwater migration and conversion rule in metamorphic rock regions and a groundwater flow system theory. The rainfall in metamorphic rock low-moustamous and hilly regions in the south is selected, but it is difficult to seep and mostly discharged by surface runoff

At the same time, large-scale reservoirs cannot be built in the low-mountainous and hilly regions to retain and store the rainfall and surface water due to topographic restrichons, directly leading that more than 80% of the rainfall flows past as surface water and cannot be used for drinking Water resources are filtered, precipitated and punfied by loose accumulations 2.

[0036] As shown in FIG, 1, a staged retaining and storing water supply system for groundwater in hilly regions mcludes a retaining and storing dam A 3 disposed on the loose accumulations 2. The retaining and storing dam A 3 is generally selected from a gentle slope valley in a metamorphic rock mountaimous region. A first water storage bin 4 is disposed in the retaining and storing dam A 3. There is a seepage channel between the retaining and storing dam A 3 and the first water storage bin 4. The seepage channel is close to the bottom of the retaining and storing dam A 3. In some embodiments, the seepage channel includes a plurality of seepage pipes, which are communicated with the foose accumulations 2 upstream of the retaining and storing dam A 3 and the first water storage bin 4, wherein a diameter of zach seepage pipe is dem to Som. After being retained by the retaining and storing dam A 3, the groundwater in the loose accumulations 2 flows into the first water storage bin 4 through the seepage channel.

After being stored tu the first water storage bin 4, the groundwater may be further processed according to actual conditions. In another embodiment, an overflow pipe is disposed on the upper part of the retaining and storing dam A 3 and located outside the retaining and storing dam A 3. A diameter of the overflow pipe is dom to Som. The overflow pipe is configured to divert excessive stored water in the first water storage bin 4 to the downstream. Mounting densities of the seepage pipes and the overflow pipes are set according to actual conditions. Generally, the mounting density of the seepage pipes is generally greater than the mounting density of the overflow pipes.

[0037] At least one retaining and storing dam B 7 is also disposed on the loose accumulations 2 and located downstream of the retaining and storing dam A 3. The number of the retaining and storing dams B 7 15 set according to actual conditions of the hilly and mountainous regions. From the upstream to the downstream of the valley, a region with relatively large undulations and thinner loose accumulations is selected, and one retaining and storing dam A 3 and multiple retaining and storing dams B 7 are built in this region respectively. The retaining and storing dam A 3 and the retaining and storing dam B 7 have the same structure. A second water storage bin 10 is disposed in the retaining and storing dam B 7. Similarly, the first water storage bin 4 and the second water storage bin 10 may adopt the same structure. Each of left side walls, right side walls, upper walls and lower walls of the retaining and storing dam A 3 and the retaining and storing dam B 7 is a solid sealed structure. The groundwater retained and stored by the retaining and storing dam A and the retaining and storing dam B 18 only capable of flowing into the water storage bins from inner sides of the retaining and storing dams, and the excessive stored water in the water storage bins 1s diverted to the downstream through the overflow pipe on the outer side, which is convenient for diverting more groundwater into the water storage bins. In another embodiment, the tops of the retaining and storing dam A 3 and the retaining and storing dam B 7 may be made into movable sealed structures to facilitate subsequent maintenance and cleaning.

[0038] Both the retaining and storing dam A 3 and the retaining and storing dam B 7 penetrate the loose accumulations 2 and extend into a dense weathered layer 1. The retaining and storing dam A 3 and the retaining and storing dam B 7 extend inte the dense weathered layer 1, which not only strengthens a structural strength of the retaining and storing dams per se, but alse further enhances a rapid seepage of the rainwater into the layer of the loose accumulations 2.

[0039] Multi-layer filter cloth 5 and a filter mesh interlayer structure 6 are disposed in wall bodies of the retaining and storing dam A 3 and the retaining and storing dam B 7, and the groundwater is filtered by the filter cloth S and the filter mesh interlayer structure 6 and then seeps into the corresponding water storage bins. The filter cloth 5 and the filter mesh interlayer structure © can effectively filter part of unpurities 10 the groundwater to achieve simple purification of the groundwater.

[0040] In another embodiment, after filter devices in the retaining and storing dam A 3 and the retaining and storing dam B 7 are arranged, a water storage pipeline & directly suitable for being just fully laid on the water storage bins is selected. The water storage pipeline 3 needs to be machined into 4 shock tube and the filter devices of the filter cloth 5 and the filter mesh interlayer structure 6 are mounted outside the tube body. Both ends of the water storage pipeline 8 are closed, and the water storage pipeline 8 18 all connected at one end by a water diversion pipe 9. A water pumping device starts to pump water from the water storage pipeline at the bottom of the retaining and storing dam, and transfers the stored water to nearby residents for use along a water diversion pipeline laid on the ground surface, or sequentially guides the water to the downstream retaining and stoning dam stage by stage for use by the nearby residents.

[0041] The water storage pipeline 8 is mounted between the first water storage bin 4 and the second water storage bin 10, and 18 connected to the water pumping device through the water diversion pipe 9. The water in the muiti-stage retaining and storing dams is pumped by the water pumping device through the water storage pipeline 8 ina coordination manner. At the same time, the water pumping device 18 based on the principle that the water stored in the retaining and storing dam downstream of the groundwater is used at first. That is, if there is no residential water in a region of the retaining and storing dam A 3 and the retaining and storing dam B 7, the water pumping device at the retaining and storing dam B 7 needs to pump water to a water supply pipe at first for the domestic water of local residents; if the water volume is sufficient for the local residents, there is no need to start the water pumping device of the upstream retaining aud storing dam A 3 for pumping water, and at the same time, the groundwater inthe upstream retaining and storing dam A 3 will continue to automatically flow toward the downstream retaining and storing dam B 7 along a groundwater seepage direction and will be supplied into the retaining and storing dam B 7, and if the water volume is insufficient, the water pumping device at the retaining and storing dam A 3 is started to pump water, and directly supplies the water to the local residents for use through the water diversion pipe 9.

[0042] An automatic water level monitoring device 1s mounted in each of the first water storage bin 4 and the second water storage bin 10. When the water level in the downstream water retaining and storing device is less than a set water level, the upstream water pumping device automatically pumps and replenishes the water to the downstream water storage device, so as to ensure antomatic water transfer at a closest distance; and the remaining excessive water volume automatically seeps to the downstream retaining and storing dam from the upstream via the loose accuroudations.

[0043] Before the retaining and storing dam A 3 is built, a long-term amount of groundwater seepage in this region is calculated based on an area and a thickness of the loose accumulations 2 upstream of the retarmng and storing dam A 3, a width of the retaining and storing dam A 3 is determined based on the amount of groundwater seepage, and a calculation formula for the amount of groundwater seepage is

O=S HH

[0044] wherein Q is the amount of underground water seepage, S is an area of a groundwater seepage field, H is an average thickness of the loose accumulations, and K is a moisture content of the Joose accumulations.

[0045] Then, a height of the retaining and storing dam A 3 is determined according to topography undulations upstream of the retaining and storing dam A 3. A height of the retaining and storing dam B 7 is not higher than a water level of the retaining and stonng dam A 3. Ha plurality of retaining and storing dams B 7 need to be built, the height and width thereof are calculated in the above manner, The height of the retaining and storing dam above the ground surface is determined according to a topography of the valley.

When the ramfall is abundant, the surface water can be retained and stored by the retaining and storing dam up to the height of the top of the dam at most, and such part of retained and stored surface water may enter the loose accumulations 2 through slow ground surface seepage, so as to achieve the purpose of converting the retained and stored surface water to the groundwater for storage, thereby effectively solving the difficulty in drinking water and drinking water safety problem in the metamorphic rock fow-mountainous and hilly regions with abundant rainfall in the south.

[0046] In the descriptions of the present invention, the description of the referring term such as "an embodiment”, "some embodiments", "examples", "specific examples" or "some examples" means that particular features, structures, materials or features described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, schematic expression of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the described particular features, structures, materials or features may be combined with any one or more embodiments or examples properly. In addition, various embodiments or examples described in the present invention, as well as features of various embodiments or examples, may be integrated and combined without contradicting each other.

[0047] The foregoing is merely preferred embodiments of the present invention, and is not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent substitutions, improvements, etc., are within the protection scope of the present invention.

Claims

S11 - Conclusions l. Phased retention and storage water supply system for groundwater in hilly areas, comprising a retention and storage dam A (3) placed on loose accumulations (2), with a first water storage tank (4) located in the retention and storage dam A ( 3); wherein there is a leakage channel between the retention and storage dam A (3) and the first water storage tank (4); wherein groundwater in the loose accumulations (2) is retained by the retention and storage dam A (3) and then flows into the first water storage tank (4) through the leakage channel; and wherein at least one retention and storage dam B (7) is located further on the loose accumulations (2) and is located downstream of the retention and storage dam A (3), and wherein a second water storage tank (10) is located in the retention and storage dam B (7).

A phased retention and storage water supply system for groundwater in hilly areas according to claim 1, wherein the retention and storage dam A (3) and the retention and storage dam B (7) both penetrate the loose accumulations (2) and form a dense weathered layer (1) in extent.

3. A phased retention and storage water supply system for groundwater in hilly areas according to claim 1, wherein a long-term amount of groundwater seepage of an area is calculated based on an area and a thickness of the loose accumulations (2) upstream of the retention and storage dam A ( 3), a width of the retention and storage dam A (3) is determined based on the amount of groundwater leakage, and a calculation formula for the amount of groundwater leakage is Q=S*H*K; where Q is the amount of subsurface water seepage, S is an area of a groundwater seep field, H is an average thickness of the loose accumulations, and K is a moisture content of the loose accumulations.

4. Phased retention and storage water supply system for groundwater in

S12 - hilly areas according to claim 1, wherein a height of the retention and storage dam A (3) is determined according to topography undulations upstream of the retention and storage dam A (3); and a height of the retention and storage dam B (7) is not higher than a water level of the retention and storage dam A (3).

A phased retention and storage water supply system for groundwater in hilly areas according to any one of claims 1 to 4, wherein multi-layer filter fabric (5) and a filter mesh interlayer structure (6) are placed in wall bodies of the retention and storage dam A (3) and the retention - and storage dam B (7), and where the groundwater is filtered through the filter fabric (5) and the filter mesh interlayer structure (6) and then leaks into the corresponding water storage vessels.

A phased groundwater retention and storage supply system in hilly areas according to claim 5, wherein a water storage pipeline (8) is mounted between the first water storage vessel (4) and the second water storage vessel (10), and the water storage pipeline (8) is connected to a water pumping device through a water diversion pipe (9).

A phased groundwater retention and storage supply system in hilly areas according to claim 5, wherein an automatic water level monitoring device is mounted in each of the first water storage vessel (4) and the second water storage vessel (10).

8. The phased retention and storage supply system for groundwater in hilly areas according to claim 5, wherein the leakage channel is near the bottom of the retention and storage dam A (3), and the leakage channel includes a plurality of leakage pipes, wherein a diameter of each leakage pipe is 4 cm — 6 cm.

A phased retention and storage water supply system for groundwater in hilly areas according to claim 8, wherein an overflow pipe is located on the upper part of the retention and storage dam A (3) and is located outside the retention and storage dam A (3), wherein a diameter of the overflow pipe is 4 cm — 6 cm;

S13 - and where the overflow pipe is used to direct excessively stored water in the first water storage tank (4) downstream.

A phased retention and storage water supply system for groundwater in hilly areas according to claim 9, wherein each of the left side walls, right side walls, upper walls and lower walls of the retention and storage dam A (3) and the retention and storage dam B (7) has a fixed closed structure is.