CN215975176U - Sponge wetland system combining rural non-point source pollution point and surface with water inlet - Google Patents

Abstract

The utility model discloses a sponge wetland system combining point-surface pollution and point-surface water inflow in rural areas, which comprises a sponge wetland arranged in a low-lying area of the rural areas, a water inlet ring arranged on one side edge of the sponge wetland, a water drainage ring arranged on the other side edge of the sponge wetland, a water inlet channel arranged on the water inlet ring, a diversion subsystem arranged outside the water inlet ring and a water delivery open channel arranged behind the water drainage ring, wherein rainwater flows into the sponge wetland from the water inlet ring for treatment after being orderly guided by the diversion subsystem and the water inlet channel, and flows into the water delivery open channel through the water drainage ring under emergency working conditions and is finally discharged; the utility model comprehensively collects the rural non-point source pollution by combining point-surface with water inlet, solves the problem that rainwater is difficult to collect or is not collected completely in time, is beneficial to treating the rural non-point source pollution, improving the current situation of river pollution and relieving flood disasters, and can be used as a first interception defense line of the non-point source pollution to reduce the load of a subsequent treatment unit.

Description

Sponge wetland system combining rural non-point source pollution point and surface with water inlet

Technical Field

The utility model belongs to the technical field of artificial wetlands, and relates to a sponge wetland system combining rural area-source pollution point and surface with water inflow.

Background

The rural areas are relatively backward developed compared with cities, part of remote areas lack a drainage system or the drainage system is incomplete, the rural area non-point source pollution formed by rainwater washing the earth surface cannot be stored through the drainage system or is not completely stored when a rainy season comes, so that water collecting points of ditches and the earth surface which is not collected enter local rivers and lakes in a overflowing mode through ditches, drainage openings and the like, the surrounding water bodies to be collected are polluted, and the local ecological environment is damaged. Meanwhile, due to the fact that the low-lying area is low in position, rainwater is accumulated to form waterlogging, and when heavy rain or rainstorm lasts, the waterlogging area is enlarged, and life and property safety of residents are endangered. Therefore, effective measures must be taken, and a point-surface combined water inflow mode is adopted according to local conditions to effectively intercept, collect and manage rural non-point source pollution, so that the rural non-point source pollution is prevented from entering a river, the pollution degree of a receiving water body is reduced, and waterlogging disasters in low-lying areas are relieved.

At present, the existing rural non-point source pollution treatment technologies mainly comprise: 1. an ecological ditch is built to collect and treat rural non-point source pollution, the aim of draining water is mostly taken, and the purification effect is weak; 2. the integrated treatment equipment is arranged, so that the operation and maintenance cost is high, the non-point source pollution collection function is not provided, no ecology exists, and the integration with the surrounding ecological environment is difficult; 3. an ecological treatment intercepting device is arranged, so that solid pollutants are mainly intercepted, non-point source pollution only can enter from a fixed water inlet point, non-point source pollution cannot be treated, and waterlogging disasters in rainy seasons cannot be solved; 4. the shoreside ladder wetland is arranged, so that the intercepting treatment load is low, the water storage capacity is weak, and the non-point source pollution can not be prevented from entering the river.

Disclosure of Invention

The utility model aims to provide a sponge wetland system combining rural area non-point source pollution point and surface with water inlet aiming at the problems in the prior art.

In order to achieve the purpose, the sponge wetland system combining rural area source pollution point-surface with water inflow comprises a sponge wetland arranged in a rural low-lying area, a water inlet ring arranged on one side edge of the sponge wetland, a water drainage ring arranged on the other side edge of the sponge wetland, a water inlet channel arranged on the water inlet ring, a diversion subsystem arranged outside the water inlet ring and a water delivery open channel arranged behind the water drainage ring, wherein rainwater flows into the sponge wetland from the water inlet ring for treatment after being orderly diverted by the diversion subsystem and the water inlet channel, and flows into the water delivery open channel through the water drainage ring under emergency working conditions and is finally discharged into a river channel.

More specifically, the water inlet ring is arranged on one side of the sponge wetland far away from the river channel, and the water discharge ring is arranged on one side of the sponge wetland close to the river channel; the water inlet ring and the water discharge ring are spliced by a plurality of gabions, the bottoms of the gabions are in seamless connection with the composite geomembrane arranged at the bottom of the sponge wetland, and the height of the water discharge ring is larger than that of the water inlet ring.

More specifically, the ground outside the water inlet ring is divided into a water permeable pad surface and a water impermeable pad surface, the water permeable pad surface is arranged on the ground at the left end and the right end outside the water inlet ring, the water impermeable pad surface is arranged on the ground in the middle outside the water inlet ring, the positions of the water permeable pad surface and the water impermeable pad surface are only one of the examples of the utility model, and the specific positions are distributed according to the actual original conditions; the water inlet ring corresponding to the waterproof pad surface is provided with water inlets, and one waterproof pad surface is correspondingly provided with at least two water inlets; the water inlet is internally provided with a water inlet pipe, and one water inlet is internally provided with at least one water inlet pipe.

More specifically, one end of the water inlet channel is connected with a water outlet position of the water collection point, and the other end of the water inlet channel is connected with the sponge wetland; the diversion subsystem is arranged on the permeable cushion surface.

More specifically, a water inlet round opening is arranged at an outlet of the water inlet channel, and the bottom of the water inlet round opening is flush with the filtering material surface in the sponge wetland; and an energy dissipation cushion layer is arranged at the lower part of the water inlet round mouth, and the area of the energy dissipation cushion layer is larger than that of the water inlet round mouth.

More specifically, the diversion subsystem comprises a diversion slope, an interception slope and an ecological diversion channel, one end of the diversion slope is connected with the hard road, the other end of the diversion slope is connected with the interception slope, and the other end of the interception slope is connected with the water inlet ring; the ecological diversion tunnel is arranged on the diversion slope and the interception slope and comprises a water inlet section connected with the hard road, a water diversion section connected with the water inlet section and a confluence section connected with the water diversion section, wherein the other end of the confluence section is connected with the sponge wetland.

More specifically, at least three water outlets are uniformly arranged on the water drainage ring; and the drainage port is internally provided with drainage pipes, and at least two drainage pipes are arranged in one drainage port.

Further specifically, the water delivery open channel comprises open channel walls arranged on two sides and a cushion layer arranged at the bottom of the open channel walls, and the upper part of the open channel walls is provided with a quick discharge port.

More specifically, when the quick discharge port is circular, the diameter of the quick discharge port is consistent with that of the drain pipe; when the quick discharge opening is rectangular, the height of the quick discharge opening is equal to or greater than that of the water discharge ring, and the length of the quick discharge opening is equal to or greater than that of the water discharge opening.

The sponge wetland comprises a treatment system and a water outlet system, wherein the water outlet system comprises a water collecting well and a water outlet pipe arranged at the bottom of the water collecting well, and the height of the water collecting well is greater than the height of a filter material surface of the sponge wetland and less than the height of a wall body.

The sponge wetland system combining rural area source pollution point and surface with water inlet can realize the following technical effects: a rural non-point source pollution point-surface combined water inlet sponge wetland system is formed by modifying low-lying areas near water bodies such as riverways and lakes, and the like, and the point-surface combined water inlet mode is adopted, so that incoming water on catchment points such as ditches or rainwater wells can be collected completely through a water inlet channel, and surface overflow rainwater which is not collected can be collected into the sponge wetland system from any position through a water inlet ring arranged on one side of the sponge wetland, and the non-point source pollution interception rate is high; a diversion subsystem is arranged outside the water inlet ring to guide peripheral overflow rainwater to flow into the sponge wetland automatically and orderly, and to intercept sediment and other substances in the rainwater; the drainage ring is arranged on the other side of the sponge wetland, so that drainage is accelerated in heavy rain or heavy rain, flood disasters are prevented, and a sponge wetland system is protected.

Drawings

FIG. 1 is a schematic structural diagram of a sponge wetland system combining rural area source pollution point and surface with water inlet;

FIG. 2 is a sectional view of a sponge wetland system;

FIG. 3 is a schematic view of a water inlet configuration;

FIG. 4 is a schematic view of a wall structure of an open channel on the side of a drainage port;

FIG. 5 is a schematic view of a rectangular quick discharge port structure;

FIG. 6 is a schematic view of a circular quick discharge port;

fig. 7 is a layout diagram of a sponge wetland system.

In the figure: 1. sponge wetland; 2. a diversion subsystem; 21. a diversion slope; 22. intercepting a slope; 23. an ecological diversion tunnel; 231. a water inlet section; 232. a flow splitting section; 233. a flow converging section; 3. a water inlet ring; 31. a water inlet; 311. a water inlet pipe; 4. a water inlet channel; 41. an energy dissipation cushion layer; 5. a processing system; 6. a water outlet system; 7. a drainage ring; 71. a water outlet; 711. a drain pipe; 8. a water delivery open channel; 81. an open channel wall; 811. a quick discharge port; 9. an emergency pump well; → water flow direction.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the utility model. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

A rural area source pollution point-surface combined water inlet sponge wetland system is shown in figures 1, 2 and 7 and comprises a sponge wetland 1 arranged in a rural low-lying area, a water inlet ring 3 arranged on one side edge of the sponge wetland 1, a water outlet ring 7 arranged on the other side edge of the sponge wetland 1, a water inlet channel 4 arranged on the water inlet ring 3, a diversion subsystem 2 arranged outside the water inlet ring 3 and a water delivery open channel 8 arranged behind the water outlet ring 7, wherein rainwater is sequentially diverted through the diversion subsystem 2 and the water inlet channel 4 and flows into the sponge wetland 1 from the water inlet ring 3, and flows into the water delivery open channel 8 through the water outlet ring 7 under emergency working conditions and is finally discharged into a river channel.

As shown in fig. 1, 2 and 7, the sponge wetland 1 is arranged in a low-lying area at the edge of a river channel, the elevation is lower than the surrounding topography, the sponge wetland 1 is arranged in a concave structure with the four sides higher than the middle part, an unpowered self-weight water inlet mode is adopted, the water storage capacity is large, and the sponge wetland 1 is designed into a triangular shape, a circular shape, a rectangular shape, a polygonal shape or other irregular shapes according to local conditions so as to reduce the damage to the local original ecological features; the sponge wetland 1 comprises a treatment system 5 and a water outlet system 6, the treatment system 5 treats the incoming water in the sponge wetland 1, and the water outlet system 6 is used for draining the sponge wetland 1 under the normal operation condition; the water outlet system 6 comprises a water collecting well arranged in the treatment system 5 and a water outlet pipe arranged at the bottom of the water collecting well, the height of the water collecting well is greater than the height of a filter material surface of the treatment system 5 and smaller than the height of a wall body of the sponge wetland 1, and the water outlet pipe is communicated with the water delivery open channel 8.

As shown in fig. 1, 2 and 7, the water inlet ring 3 is arranged on one side of the sponge wetland 1 far away from the river channel, the water inlet ring 3 is arranged on the wall of the sponge wetland 1, the bottom of the water inlet ring is in seamless connection with a composite geomembrane arranged in the sponge wetland 1, the composite geomembrane is arranged to be attached to the ground, rainwater infiltration is prevented, the rainwater interception effect of the sponge wetland 1 on rainwater is ensured, and the water inlet ring 3 is arranged according to the shape of the sponge wetland 1, can be arranged in a straight line or a curve, is tightly attached to a peripheral catchment area, and adapts to the environment; intake circle 3 adopts a plurality of gabions to splice and forms, and gabion department all can intake, and the rainwater can be followed intake circle 3's optional position gets into in the sponge wetland 1, do not receive the restriction of the position of intaking, and non point source pollutes the interception rate height, arbitrary the height of gabion sets up to 0.5m, guarantees intake 3 reduce the construction cost as far as in the steadiness of circle, the building stones in the gabion are chooseed for use and are had no native impurity's stone, wash before filling, guarantee that the passageway of intaking is smooth and easy.

As shown in fig. 1, 2 and 3, the ground outside the water inlet ring 3 is divided into a water permeable pad and a water impermeable pad, the water permeable pad is arranged on the ground at the left and right ends outside the water inlet ring 3, the water impermeable pad is arranged on the ground in the middle outside the water inlet ring 3, and the positions of the water permeable pad and the water impermeable pad are only one example of the present invention, and the specific positions are distributed according to the actual original situation; the water inlet ring 3 is provided with water inlets 31, the positions of the water inlets 31 are arranged corresponding to the positions of the waterproof pad surfaces, the water inlet efficiency of the waterproof pad surfaces is improved, rainwater accumulation is prevented, the water inlets 31 are properly increased or decreased according to the catchment area of the local waterproof pad surfaces, and the number of the water inlets 31 arranged corresponding to one waterproof pad surface is not less than two; set up inlet tube 311 in the water inlet 31, one set up one at least in the water inlet 31 inlet tube 311, the water inlet 31 is the gabion of establishing inlet tube 311 in, inlet tube 311 by building stones in the gabion is fixed, building stones in the gabion are pushed down inlet tube 311 is in order to fix inlet tube 311, the mouth of pipe all sets up around the inlet tube 311 in the gabion check net, reduces the solid pollutant and gets into, prevents to block up, the length of inlet tube 311 sets up to be unanimous with the gabion width, the pipe diameter of inlet tube 311 carries out the integrated design according to catchment area and the local rainfall of waterproof pad face, nevertheless is not more than the gabion height.

As shown in fig. 1, 2 and 7, the inlet channel 4 is arranged at a water outlet position of a catchment point such as a local rainwater ditch, a rainwater pipe or a rainwater well, one end of the inlet channel 4 is connected with the catchment point, the other end of the inlet channel 4 passes through the inlet ring 3 to be connected with the sponge wetland 1, the inlet channel 4 is arranged according to a local actual catchment point, the number of the inlet channel 4 is consistent with the local actual catchment point, the inlet channel 4 is arranged in a straight or curved shape according to the catchment point position and a natural water flow path, the width of the inlet channel 4 is larger than the height, so that the water potential energy is reduced, and the impact on the sponge wetland is reduced; the top of the water inlet channel 4 is higher than the top of the water inlet ring 3, the height of the bottom of the water inlet channel 4 is gradually reduced from an inlet to an outlet, and the water coming from a water gathering point enters the sponge wetland 1 under the dead weight; the outlet of the water inlet channel 4 is provided with a water inlet round mouth, the diameter of the water inlet round mouth is smaller than the width and the height of the water inlet channel 4, the water quantity at the outlet can be effectively controlled, the bottom of the sponge wetland 1 is prevented from being impacted excessively, the bottom of the water inlet round mouth is flush with the surface of a filter material in the sponge wetland 1, the lower part of the water inlet round mouth is provided with an energy dissipation cushion layer 41, the bottom of the energy dissipation cushion layer 41 is arranged in the filter material in the sponge wetland 1, the top surface of the energy dissipation cushion layer is higher than the surface of the filter material and is fixed by the filter material without additionally arranging a fixing device, the energy dissipation cushion layer 41 is rectangular or circular, the area of the energy dissipation cushion layer 41 is larger than that of the water inlet round mouth, good energy dissipation effect is ensured, the impact on the treatment system 5 is reduced, the energy dissipation cushion layer 41 is formed by enclosing irregular stones at corners, and the size of the middle stones is smaller than that of the periphery stones, the stability of the structure of the energy dissipation cushion layer 41 is enhanced.

As shown in fig. 1, fig. 2 and fig. 7, the diversion subsystem 2 is disposed on the water permeable mat surface, the diversion subsystem 2 includes a diversion slope 21, an interception slope 22 and an ecological diversion canal 23, the diversion slope 21 is arranged below the hard road, the upper end of the diversion slope is connected with the hard road, the lower end of the diversion slope is connected with the interception slope 22, the height of the diversion slope 21 is lower than the road surface height of the hard road, rainwater automatically flows into the diversion slope 21 from the hard road under the action of the height difference, the diversion slope 21 is tightly attached to the side lines of surrounding buildings and native plants, so that the earth surface overflowing rainwater in all directions is ensured to be guided in order, the diversion slope 21 adopts stones with protruded corners, increases the flowing water path, is beneficial to orderly diversion of rainwater, the size of the stone blocks of the diversion slope 21 is larger than that of the gabion stone material of the water inlet ring 3 and that of the energy dissipation cushion layer 41, so that the stability is high, and the influence of rainwater erosion is reduced; the lower part of the diversion slope 21 is connected with the interception slope 22, the upper end of the interception slope 22 is connected with the diversion slope 21, the lower end of the interception slope 22 is attached to the bottom of the water inlet ring 3, rainwater is guaranteed to completely flow into the sponge wetland 1, turf and various mixed and matched plants are planted on the interception slope 22, the slope fixing effect is good, solid matters such as silt in the rainwater can be intercepted, and the ecological landscape effect is enhanced; the gradient of the interception slope 22 is smaller than that of the diversion slope 21, so that the flow velocity of rainwater is reduced, the motion resistance of solid matters is enhanced, and the interception effect of the solid matters is improved.

As shown in fig. 1, 2 and 7, an ecological diversion trench 23 is arranged on the diversion slope 21 and the interception slope 22, the ecological diversion trench 23 is used for increasing the water passing amount and reducing the impact load of the sponge wetland 1 in heavy rain and heavy rain, at least one ecological diversion trench 23 is arranged, the ecological diversion trench 23 is formed by paving cobblestones and is fused with the surrounding ecological environment, the length of the ecological diversion trench 23 is the sum of the widths of the diversion slope 21 and the interception slope 22, and the surface of the ecological diversion trench 23 is flush with the surfaces of the diversion slope 21 and the interception slope 22; the ecological diversion canal 23 comprises a water inlet section 231, a diversion section 232 and a confluence section 233, wherein the water inlet section 231 is connected with a hard road or a gravel road, the periphery is enclosed by large-size cobblestones, the interior is filled with small-size cobblestones, the diversion section 232 is arranged below the water inlet section 231, the diversion section 232 is used for conducting diversion and energy dissipation on incoming water with large water flow, and the diversion section 232 is composed of at least two mutually-separated diversion canals; a confluence section 233 is arranged below the diversion section 232, one end of the confluence section 233 is connected with the diversion section 232, the other end of the confluence section 233 is connected with the sponge wetland 1, the confluence section 233 collects the received water from the diversion section 232 and sends the collected water to the sponge wetland 1, the confluence section 233 is formed by merging of branch channels, and the width of the confluence section 233 is greater than that of any branch channel.

As shown in fig. 1, 2 and 7, the drainage ring 7 is arranged on one side of the sponge wetland 1 close to the river channel, the drainage ring 7 is arranged on the wall of the sponge wetland 1, the bottom of the drainage ring is seamlessly connected with the composite geomembrane arranged in the sponge wetland 1, the drainage ring 7 is formed by splicing gabions in an end-to-end manner, the wall of the sponge wetland 1 is pressed and fixed, the drainage ring 7 is arranged to be an approximately straight relaxation curve, the height of the drainage ring 7 is greater than that of the water inlet ring 3, the height of the drainage ring 7 is consistent with that of the water delivery open channel 8, and the drainage ring 7 is arranged to accelerate drainage in heavy rain or heavy rain, prevent flood disasters and protect the sponge wetland system.

As shown in fig. 1, 2, 5 and 7, the drainage ring 7 is provided with drainage ports 71 for draining floodwater, the drainage ports 71 are uniformly arranged on the drainage ring 7, at least three drainage ports 71 are arranged, so that the wall stability of the sponge wetland 1 is not damaged while the flood drainage effect is ensured, the height of the gabion is set according to the height of the drainage ports 71, the height of the drainage ports 71 is set according to the actual water storage capacity of the sponge wetland 1, the drainage ports 71 are used for drainage in emergency flood drainage, and the height of the drainage ports 71 is higher than the actual water storage height of the sponge wetland 1; the drainage port 71 is internally provided with a drainage pipe 711, the drainage port 71 is a gabion internally provided with the drainage pipe 711, one drainage port 71 is internally provided with at least two drainage pipes 711, the drainage pipe 711 is arranged in the gabion, building stones are arranged around the drainage pipe 711, the drainage pipe 711 is fixed in the gabion by the building stones, a water inlet pipe opening of the drainage pipe 711 is arranged in a gabion mesh of the gabion, sundries are prevented from entering a pipe, blocking is prevented, in order to guarantee the fixing effect of the drainage pipe 711, one drainage pipe 711 is only arranged in the gabion, and the pipe diameter of the drainage pipe 711 is larger than that of the water inlet pipe 311, so that drainage when the rainfall is large is facilitated.

As shown in fig. 1, fig. 2, fig. 4 and fig. 7, the drainage ring 7 is externally provided with a water delivery open channel 8, the water delivery open channel 8 comprises open channel walls 81 arranged at two sides and a cushion layer arranged at the bottom of the open channel walls 81, the top of the open channel walls 81 is flush with the top of the drainage ring 7, the open channel walls 81 are tightly attached to the drainage ring 7, an emergency pump well 9 is arranged in the water delivery open channel 8, a lift pump and an emergency drainage pipe are arranged in the emergency pump well 9, and an electric valve is arranged at the emergency drainage pipe for accelerating drainage when the rainfall is large and preventing flood disasters.

As shown in fig. 1, 2, 4, 5, 6 and 7, a quick discharge port 811 is provided on the open channel wall 81, the quick discharge port 811 is provided on an upper portion of the open channel wall 81, and the quick discharge port 811 may be provided in a circular or rectangular shape; when the local rainstorm period is short, the quick discharge ports 811 are circular, the length of the drainage pipes 711 is equal to the sum of the width of a gabion and the thickness of the open channel wall 81, the diameter of the circular quick discharge ports is consistent with that of the drainage pipes 711, the water outlets of the drainage pipes 711 are arranged in the circular quick discharge ports, water in the sponge wetland 1 is discharged into the water conveying open channel 8 through the drainage pipes 711, the number of the circular quick discharge ports is set according to the number of the drainage pipes 711, and one drainage pipe 711 is correspondingly provided with one circular quick discharge port; when the local rainstorm period is longer, the quick discharge port 811 is rectangular, the rectangular quick discharge port is a non-top rectangular notch, the height of the rectangular quick discharge port is equal to or greater than the height of the drainage ring 7, the length of the rectangular quick discharge port is equal to or greater than the sum of the lengths of a plurality of gabions with built-in drainage pipes 711, namely, the length of one of the rectangular quick discharge ports is equal to or greater than the length of one of the water discharge ports 71, the rectangular quick discharge port is exposed out of the water discharge port 71, namely, the outlet of the drain pipe 711 and the plurality of gabions with the built-in drain pipes 711 are exposed, water is discharged from the drain pipes 711 and the plurality of gabions with the built-in drain pipes 711, flows into the water delivery open channel 8 through the rectangular quick discharge ports, the flood discharge speed can be increased, one of the water outlets 71 can be correspondingly provided with a plurality of rectangular quick discharge openings, and all the water outlets 71 are exposed one by one through the plurality of rectangular quick discharge openings.

The sponge wetland system combining the rural area non-point source pollution point and the surface with water inlet can realize the following technical effects that the water inlet ring 3 is arranged, no requirement is made on the water inlet point, water can be fed from any point of the water inlet ring 3, and the non-point source pollution interception rate is high; the drainage ring 7 is arranged, so that drainage is accelerated in heavy rain or heavy rain, flooding is prevented, and the sponge wetland system is protected; the water inlet structure is arranged to guide peripheral overflow rainwater to flow into the sponge wetland 1 in an orderly and self-flowing manner and intercept solid matters such as silt in the rainwater; the water delivery open channel 8 is arranged to guide the water in the sponge wetland 1 to flow into the next treatment unit or river channel in order.

Through the sponge wetland system, the incoming water and the unconcentrated overflowing rainwater on catchment points such as ditches or rainwater wells in rural areas can be comprehensively collected and treated, and the ecological and attractive sponge wetland system with the functions of interception, energy dissipation, purification, water storage and drainage is built to serve as a first interception defense line for preventing rural area non-point source pollution from entering a river, so that the ecological environment of the rural areas is improved.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (10)

1. A sponge wetland system combining rural non-point source pollution point and surface with water inlet is characterized in that: including sponge wetland (1) that sets up in rural low-lying district, set up intake circle (3) on sponge wetland (1) one side sideline, set up and be in drainage circle (7) on sponge wetland (1) opposite side sideline, set up intake canal (4) on intake circle (3), set up and be in intake outside circle (3) water conservancy diversion subsystem (2) and setting are in water delivery open channel (8) behind drainage circle (7), rainwater are through water conservancy diversion subsystem (2) and intake canal (4) water conservancy diversion back in order, follow intake circle (3) flow in sponge wetland (1) are handled, pass through under the emergent operating mode drainage circle (7) flow in water delivery open channel (8), the river course of finally discharging.

2. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 1, which is characterized in that: the water inlet ring (3) is arranged on one side of the sponge wetland (1) far away from the river channel, and the water discharge ring (7) is arranged on one side of the sponge wetland (1) close to the river channel; the water inlet ring (3) and the drainage ring (7) are spliced by a plurality of gabions, the bottoms of the gabions are seamlessly connected with the composite geomembrane arranged at the bottom of the sponge wetland (1), and the height of the drainage ring (7) is larger than that of the water inlet ring (3).

3. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 2, which is characterized in that: the ground outside the water inlet ring (3) is divided into a water permeable cushion surface and a water impermeable cushion surface, the water permeable cushion surface is arranged on the ground at the left end and the right end outside the water inlet ring (3), the water impermeable cushion surface is arranged on the ground in the middle outside the water inlet ring (3), the water inlet ring (3) corresponding to the water impermeable cushion surface is provided with water inlets (31), and one water impermeable cushion surface is correspondingly provided with at least two water inlets (31); and water inlet pipes (311) are arranged in the water inlets (31), and at least one water inlet pipe (311) is arranged in one water inlet (31).

4. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 3, which is characterized in that: one end of the water inlet channel (4) is connected with the water outlet position of the water collection point, and the other end of the water inlet channel is connected with the sponge wetland (1); the diversion subsystem (2) is arranged on the water permeable cushion surface.

5. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 4, which is characterized in that: a water inlet round opening is arranged at the outlet of the water inlet channel (4), and the bottom of the water inlet round opening is flush with the filtering material surface in the sponge wetland (1); an energy dissipation cushion layer (41) is arranged on the lower portion of the water inlet round opening, and the area of the energy dissipation cushion layer (41) is larger than that of the water inlet round opening.

6. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 4, which is characterized in that: the diversion subsystem (2) comprises a diversion slope (21), an interception slope (22) and an ecological diversion tunnel (23), one end of the diversion slope (21) is connected with the hard road, the other end of the diversion slope is connected with the interception slope (22), and the other end of the interception slope (22) is connected with the water inlet ring (3); ecological water conservancy diversion way (23) set up on water conservancy diversion slope (21) and interception slope (22), ecological water conservancy diversion way (23) are including the section of intaking (231) of being connected with the stereoplasm road, with the reposition of redundant personnel section (232) of intaking being connected (231), with the section of converging section (233) of being connected of reposition of redundant personnel section (232), the other end of converging section (233) is connected with sponge wetland (1).

7. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 1, which is characterized in that: the drainage ring (7) is uniformly provided with at least three drainage ports (71), and the number of the drainage ports (71) is at least three; a drain pipe (711) is provided in the drain port (71), and at least two drain pipes (711) are provided in one drain port (71).

8. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 1, which is characterized in that: the water delivery open channel (8) comprises open channel wall bodies (81) arranged on two sides and a cushion layer arranged at the bottom of the open channel wall body (81), and a quick discharge port (811) is arranged at the upper part of the open channel wall body (81).

9. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 8, which is characterized in that: when the quick discharge port (811) is set to be circular, the diameter of the quick discharge port (811) is consistent with that of the drain pipe (711); when the quick discharge port (811) is set to be rectangular, the height of the quick discharge port (811) is equal to or greater than that of the drainage ring (7), and the length of the quick discharge port (811) is equal to or greater than that of the drainage port (71).

10. The rural area non-point source pollution point-surface water inlet sponge wetland system of claim 1, which is characterized in that: the sponge wetland (1) comprises a treatment system (5) and a water outlet system (6), wherein the water outlet system (6) comprises a water collecting well and a water outlet pipe arranged at the bottom of the water collecting well, and the height of the water collecting well is greater than the height of a filter material surface of the sponge wetland (1) and less than the height of a wall body.

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