Modularized ecological net flow channel structure and ecological buffer zone

Abstract

The modular ecological net flow channel structure comprises a land area buffer area, an ecological net flow channel and a water level variable amplitude area, a net flow channel division bin is arranged in the ecological net flow channel, a water collecting hole is formed in the upper portion of a water inlet area of the ecological net flow channel, the water inlet area is communicated with the net flow channel division bin through a bottom water passing hole, and the water inlet area is communicated with the water level variable amplitude area. A ceramsite purification layer is filled in the net flow channel division bin, and a top overflow port is formed in the upper part of the outer side of the net flow channel division bin. Modularized ecological flow purification ditch structures are added into a land area buffer area and a water level variable amplitude area of a river and lake ecological buffer zone, the hydraulic retention time of sewage in the buffer zone is prolonged, and the problem that runoff pollution cannot be effectively intercepted and purified due to the fact that the width of the buffer zone is insufficient can be solved; the method ensures that the runoff is effectively slowed down and dispersed before entering the lake, is an effective water environment treatment technology, and is of great significance for protecting the lake water quality and maintaining the river ecosystem.

Description

Technical Field

[0001] The present invention relates to the field of water ecological management measures or sewage pretreatment technology, and in particular to a modular ecological clean flow ditch structure and an ecological buffer zone. Background Art

[0002] The ecological buffer zone is a water ecological governance measure and an important ecological space for rivers and lakes. It is of great significance to block or mitigate the direct interference of human activities on rivers and lakes, protect the biodiversity of rivers and lakes, and reduce the entry of non-point source pollutants into rivers and lakes. The ecological buffer zone, especially the river and lake ecological buffer zone, is arranged on both sides of the river or outside the lake. The width is limited by the land use nature on both sides of the river or outside the lake. The width is often narrow, resulting in a shorter residence time of runoff sewage entering the ecological buffer zone, affecting the efficiency of pollutant interception and reducing the ecological role of the buffer zone. Especially in the rainy season, the runoff flow rate is accelerated, and the sewage enters the river and lake directly before being filtered, causing the sewage to directly enter the river and lake and affect the water quality. Therefore, it is necessary to design a solution that can overcome the above defects to a certain extent. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a modular ecological clean flow ditch structure and an ecological buffer zone.

[0004] The present invention is achieved through the following technical solutions:

[0005] A modular ecological clean flow ditch structure comprises an ecological clean flow ditch, wherein a water inlet area and a clean flow ditch compartment located on the side of the water inlet area are arranged in the ecological clean flow ditch, a water collecting hole is arranged above the water inlet area of ​​the ecological clean flow ditch, the water inlet area and the clean flow ditch compartment are connected through a bottom water through hole, the bottom water through hole is arranged near the bottom of the ecological clean flow ditch, a ceramsite purification layer is filled in the clean flow ditch compartment, and a top overflow port is opened on the upper outer side of the clean flow ditch compartment.

[0006] According to the above technical solution, preferably, a clean flow ditch cover is provided above the ecological clean flow ditch, and the water collection hole is opened on the clean flow ditch cover.

[0007] According to the above technical solution, preferably, the ecological clean flow ditch is a rectangular structure, and L-shaped slots are respectively arranged on both sides above the ecological clean flow ditch for placing the clean flow ditch cover plate.

[0008] According to the above technical solution, preferably, the clean flow ditch cover is made of concrete and has an installation slope of ≥3‰.

[0009] According to the above technical solution, preferably, the ecological clean flow ditch and the clean flow ditch compartments are both made of reinforced concrete, and the bottom of the ecological clean flow ditch is compacted with plain soil.

[0010] According to the above technical solution, preferably, the distance between the bottom water hole and the bottom of the ecological clean flow ditch is ≥50mm.

[0011] The present application also discloses an ecological buffer zone, including the above-mentioned modular ecological clean flow ditch structure, and also including a land buffer zone and a water level variation zone located on both sides of the ecological clean flow ditch. The water collection hole is arranged close to the land buffer zone, and the top overflow port is arranged toward the water level variation zone.

[0012] According to the above technical solution, preferably, the terrestrial buffer zone is planted with buffer zone vegetation, and the water level variation zone is planted with emergent plants.

[0013] According to the above technical solution, preferably, the emergent plant maintains a distance of ≥10 cm from the top overflow port.

[0014] According to the above technical scheme, preferably, water flows into the clean flow ditch compartment of the ecological clean flow ditch through the terrestrial buffer zone, and after the expanded clay purification layer in the clean flow ditch compartment purifies the water, it overflows from the top overflow port, and enters the river and lake water system after further filtration by the emergent plants on the water level variation zone in front of the top overflow port.

[0015] The beneficial effects of the present invention are:

[0016] The present invention adds a modular ecological clean flow ditch structure to the terrestrial buffer zone and water level variation zone of the river and lake ecological buffer zone, which is beneficial to prolonging the hydraulic retention time of sewage in the buffer zone, can make up for the problem that the buffer zone is insufficient in width and cannot effectively intercept and purify runoff pollution, and ensure that the runoff is effectively slowed down and dispersed before entering the lake.

[0017] At the same time, the ecological clean flow ditch is filled with ceramsite, which has good adsorption properties and can adsorb and remove harmful substances in runoff, such as heavy metals, organic matter, etc. For the plant buffer zone or the part of the surface runoff that cannot be completely purified, the present invention can play a role in supplementary purification. The ecological clean flow ditch set in the urban area can also be connected with other collection facilities to collect and store rainwater resources, which helps to improve the efficiency of water resource utilization and relieve the pressure on the urban drainage system.

[0018] In addition, the ecological clean flow ditch has many functions, such as intercepting buffer zone runoff, further purifying runoff, reducing pollutants and suspended matter entering the lake, protecting the river ecosystem, and improving the efficiency of water resource utilization. It is an effective water environment governance technology and is of great significance for protecting lake water quality and maintaining river ecosystems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a longitudinal section view of the ecological clean flow ditch of the present invention.

[0021] Figure 3 It is a cross-sectional view of the ecological clean flow ditch of the present invention.

[0022] Figure 4 It is a schematic diagram of the main structure of the clean flow ditch cover plate of the present invention.

[0023] In the figure: 1. Terrestrial buffer zone; 2. Buffer zone vegetation; 3. Clean flow ditch cover; 4. Water collection hole; 5. Ecological clean flow ditch; 6. Clean flow ditch compartment; 7. Bottom water hole; 8. Expanded clay purification layer; 9. Top overflow port; 10. Water level variation zone; 11. Emergent plants; 12. River and lake water system. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and the best embodiment. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the invention.

[0025] In the description of the invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0026] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1: As shown in the figure, the present invention includes an ecological clean flow ditch 5, in which a water inlet area and a clean flow ditch compartment 6 located on the side of the water inlet area are arranged, and a water collecting hole 4 is arranged above the water inlet area of ​​the ecological clean flow ditch 5. The water inlet area and the clean flow ditch compartment 6 are connected through a bottom water hole 7. The bottom water hole 7 is arranged near the bottom of the ecological clean flow ditch 5. The clean flow ditch compartment 6 is filled with a ceramsite purification layer 8, and a top overflow port 9 is opened on the upper outer side of the clean flow ditch compartment 6.

[0028] Among them, a clean flow ditch cover plate 3 is arranged above the ecological clean flow ditch 5, and the water collection holes 4 are opened on the clean flow ditch cover plate 3. The clean flow ditch cover plate 3 is made of concrete, with a thickness of 60mm and an installation slope of ≥3‰, which effectively avoids water accumulation on the cover plate. The water collection holes 4 are evenly distributed on the clean flow ditch cover plate 3. The water collection holes 4 are circular with a diameter of 50mm. The interval between each water collection hole 4 is 50mm, and they are arranged parallel to the river direction. L-shaped card slots are arranged on both sides of the upper side of the ecological clean flow ditch 5 for placing the clean flow ditch cover plate 3.

[0029] The ecological clean flow ditch 5 is a rectangular parallelepiped structure, which is arranged on the side of the river or lake near the shore, and the L-shaped slots on both sides of the ecological clean flow ditch 5 are 90 mm high. The ecological clean flow ditch 5 and the clean flow ditch compartment 6 are both made of reinforced concrete (preferably but not limited to single-layer bidirectional steel bars with Ф6@200 in this example), and the bottom of the ecological clean flow ditch 5 is compacted with plain soil during installation.

[0030] Specifically, the water holes 7 at the bottom of the clean flow ditch compartment 6 are circular with a diameter of 50 mm, and the interval between each bottom water hole 7 is 100 mm. The height between the bottom water hole 7 and the bottom of the ecological clean flow ditch 5 should be ≥50 mm. The ceramsite purification layer 8 can be designed according to the measured pollutant concentration, and the thickness of the ceramsite purification layer 8 should be ≥380 mm. The overflow port 9 at the top of the ecological clean flow ditch 5 is circular with a diameter of 20 mm, evenly distributed on the side of the ecological clean flow ditch 5 close to the river and lake water system 12, and arranged parallel to the river direction. Its height is higher than the normal water level line of the river and lake water system 12, and the interval between each top overflow port 9 is 40 mm. The height of the top overflow port 9 from the upper clean flow ditch cover plate 3 should be 50 mm.

[0031] Example 2: The present application also discloses an ecological buffer zone, including the above-mentioned modular ecological clean flow ditch 5 structure, and also including a land buffer zone 1 and a water level variation zone 10 located on both sides of the ecological clean flow ditch 5. The water collection hole 4 is arranged close to the land buffer zone 1, and the top overflow port 9 is arranged toward the water level variation zone 10.

[0032] Among them, the land buffer zone 1 can be planted with suitable buffer zone vegetation 2 based on actual conditions, mainly including shrubs and herbaceous plants, and the planting width should be designed according to the pollutant concentration. The water level fluctuation zone 10 can be planted with suitable emergent plants 11 based on actual conditions, and the emergent plants 11 should be kept at a distance of ≥10cm from the top overflow port 9 to avoid blockage.

[0033] The water flows into the clean flow ditch compartment 6 of the ecological clean flow ditch 5 through the terrestrial buffer zone 1, and the sewage is further purified and filtered under the action of the expanded clay purification layer 8, which adsorbs and removes harmful substances in the runoff. The expanded clay purification layer 8 in the clean flow ditch compartment 6 purifies the water, and the water level gradually rises in the clean flow ditch compartment 6 until it overflows from the top overflow port 9 on the side of the ecological clean flow ditch 5 close to the river and lake water system 12, and is further filtered by the emergent plants 11 on the water level variation zone 10 in front of the top overflow port 9 before entering the river and lake water system 12.

[0034] The present invention adds a modular ecological clean flow ditch structure to the terrestrial buffer zone and water level variation zone of the river and lake ecological buffer zone, which is beneficial to prolonging the hydraulic retention time of sewage in the buffer zone, can make up for the problem that the buffer zone is insufficient in width and cannot effectively intercept and purify runoff pollution, and ensure that the runoff is effectively slowed down and dispersed before entering the lake.

[0035] At the same time, the ecological clean flow ditch is filled with ceramsite, which has good adsorption properties and can adsorb and remove harmful substances in runoff, such as heavy metals, organic matter, etc. For the plant buffer zone or the part of the surface runoff that cannot be completely purified, the present invention can play a role in supplementary purification. The ecological clean flow ditch set in the urban area can also be connected with other collection facilities to collect and store rainwater resources, which helps to improve the efficiency of water resource utilization and relieve the pressure on the urban drainage system.

[0036] In addition, the ecological clean flow ditch has many functions, such as intercepting buffer zone runoff, further purifying runoff, reducing pollutants and suspended matter entering the lake, protecting the river ecosystem, and improving the efficiency of water resource utilization. It is an effective water environment governance technology and is of great significance for protecting lake water quality and maintaining river ecosystems.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A modular ecological clean flow ditch structure, characterized in that: The invention comprises an ecological clean flow ditch (5), wherein the ecological clean flow ditch (5) is provided with a water inlet area and a clean flow ditch compartment (6) located on the side of the water inlet area. A water receiving hole (4) is arranged above the water inlet area of ​​the ecological clean flow ditch (5), and the water inlet area is connected to the clean flow ditch compartment (6) through a bottom water hole (7), and the bottom water hole (7) is arranged near the bottom of the ecological clean flow ditch (5). The clean flow ditch compartment (6) is filled with a ceramsite purification layer (8), and a top overflow port (9) is provided on the upper outer side of the clean flow ditch compartment (6).

2. According to claim 1, a modular ecological clean flow channel structure is characterized in that: A clean flow ditch cover plate (3) is arranged above the ecological clean flow ditch (5), and the water collection hole (4) is opened on the clean flow ditch cover plate (3).

3. According to claim 2, a modular ecological clean flow channel structure is characterized in that: The ecological clean flow ditch (5) is a rectangular parallelepiped structure. Furthermore, L-shaped slots are arranged opposite to each other on both sides above the ecological clean flow ditch (5) for placing the clean flow ditch cover plate (3).

4. A modular ecological clean flow ditch structure according to claim 2 or 3, characterized in that: The clean flow channel cover plate (3) is made of concrete and has an installation slope of ≥3‰.

5. A modular ecological clean flow ditch structure according to claim 4, characterized in that: The ecological clean flow ditch (5) and the clean flow ditch compartment (6) are both made of reinforced concrete, and the bottom of the ecological clean flow ditch (5) is compacted with plain soil.

6. A modular ecological clean flow channel structure according to claim 1, characterized in that: The distance between the bottom water hole (7) and the bottom of the ecological clean flow ditch (5) is ≥50 mm.

7. An ecological buffer zone, comprising a modular ecological clean flow channel structure as claimed in claim 5, characterized in that: It also includes a land buffer zone (1) and a water level fluctuation zone (10) located on both sides of the ecological clean flow ditch (5); the water collection hole (4) is arranged close to the land buffer zone (1), and the top overflow port (9) is arranged toward the water level fluctuation zone (10).

8. An ecological buffer zone according to claim 7, characterized in that: The land buffer zone (1) is planted with buffer zone vegetation (2), and the water level fluctuation zone (10) is planted with emergent plants (11).

9. An ecological buffer zone according to claim 8, characterized in that: The emergent plant (11) is kept at a distance of ≥10 cm from the top overflow port (9).

10. An ecological buffer zone according to claim 8, characterized in that: Water flows through the terrestrial buffer zone (1) into the clean flow ditch compartment (6) of the ecological clean flow ditch (5). After the water is purified by the ceramsite purification layer (8) in the clean flow ditch compartment (6), it overflows from the top overflow port (9), is further filtered by the emergent plants (11) on the water level variation zone (10) in front of the top overflow port (9), and then enters the river and lake water system (12).

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