Pollution-reducing and carbon-reducing ecological riverway system

Abstract

The utility model discloses a pollution-reducing and carbon-reducing ecological riverway system which comprises a filtering interception dam located between a target river section and upstream and downstream, a riverway bottom mud dredging area and a waterfront ecological buffer zone located between the riverway bottom mud dredging area and river banks on the two sides, and the water depth of the buffer zone is adjusted through a geotextile pipe bag. The filtering and intercepting dam comprises an upstream face gravel layer, a downstream face gravel layer, a bagged soil tamping layer and a water passing area, and scoured and deposited bottom mud in the river channel bottom mud dredging area is recycled to the buffer zone. Through the arrangement of the interception dam and the buffer zone, the external river pollution and biological interference are effectively reduced, and meanwhile, the resource utilization efficiency is improved, the ecological benefits of sludge treatment are guaranteed, and energy conservation and emission reduction are realized through the recycling of the scoured and silted bottom mud; meanwhile, the aquatic plants planted in the system provide foraging, inhabiting and other places for aquatic animals, the biological diversity of the river ecological system is guaranteed, comprehensive treatment and ecological restoration of the river water environment are achieved, and the ecological function and the self-purification capacity of the river are improved.

Description

Technical Field

[0001] The utility model belongs to the field of water environment management, and in particular relates to an ecological river system for reducing pollution and carbon emissions. Background Art

[0002] Due to the influence of multiple factors such as industrial and agricultural sewage discharge, urban surface runoff pollution, riverbed siltation, slope hardening, etc., the transparency of river water has decreased, the sediment pollution has become serious, and the population of aquatic organisms in the river has decreased, resulting in serious degradation of the self-repair and self-purification capabilities of the river ecosystem.

[0003] In response to the above problems, some river ecological management solutions have emerged in the prior art. For example, the self-purification capacity of the river can be enhanced by building ecological floating islands, wetland parks and other measures; the biodiversity of the river can be enriched by introducing biological resources such as aquatic plants and microorganisms; and the recovery of the river ecosystem can be promoted by dredging to improve the riverbed sediment and restore the river slopes. However, these solutions often only focus on one aspect of the river ecosystem, lack of systematicity and integrity, and it is difficult to achieve the goal of reducing pollution and carbon emissions and comprehensively improving the river water environment. Specifically, in terms of improving riverbed sediment, single dredging is a short-term treatment method and cannot achieve long-term stability in improving the habitat conditions of riverbed sediment. In addition, the dredged sediment needs to be transported to a designated treatment site by special transport vehicles for further treatment or disposal, and a large amount of carbon emissions are often generated during the transportation of sediment by dredging vehicles.

[0004] After searching, the existing Chinese invention application document with publication number CN108086243A discloses an ecological riverside belt for a navigable river. "The riverside belt includes an ecological purification section and an animal channel compensation section arranged at intervals along the river. The ecological purification section is provided with an ecological anti-scouring belt (30), a retaining wall (31) and a wave-breaking purification wetland (32). The animal channel compensation section is provided with a biological slow-moving channel (20) and a biological buffer pond (21). A land transition zone (4) is provided behind the ecological purification section and the animal channel compensation section. A permeable pile (201) is provided on the biological slow-moving channel (20)." Although the ecological riverside belt for the navigable river mentioned in the invention application has improved the ecological environment of the river to a certain extent, the application only focuses on the ecological restoration of the navigable river, has certain limitations in the layout and setting of the riverside belt, and lacks the treatment of the riverbed mud. Utility Model Content

[0005] In order to solve the problems existing in the prior art mentioned above, the purpose of the utility model is to provide an ecological river system for reducing pollution and carbon emissions. By comprehensively applying multidisciplinary knowledge such as ecological engineering, environmental science, and aquatic biology, a systematic solution is adopted to construct an ecological river system for reducing pollution and carbon emissions in the target river section, which focuses on river water purification, overall restoration of the river ecosystem, and protection of biodiversity. The system not only focuses on the comprehensive management and ecological restoration of the water environment, but also creates a good river system landscape through reasonable spatial layout of aquatic plants and seasonal changes. The system can realize the reconstruction and virtuous cycle of the river ecological self-purification system, stabilize the water ecosystem in the river, and have the ability to continuously self-purify and resist external pollution. It provides new ideas and methods for the management of urban river water environment in my country, and comprehensively improves the ecological function and self-purification capacity of the river.

[0006] In order to achieve the above purpose and other related purposes, the utility model adopts the following technical solutions:

[0007] The utility model provides an ecological river channel system for pollution reduction and carbon reduction, wherein the river channel comprises an upstream river section, a target river section and a downstream river section, and is characterized in that it comprises a filtering interception dam, a river channel bottom mud dredging area and a waterfront ecological buffer zone, wherein the filtering interception dam is arranged at the connection between the target river section and the upstream river section, and between the target river section and the downstream river section, and the waterfront ecological buffer zone is located between the river channel bottom mud dredging area and the river banks on both sides of the target river section, the filtering interception dam comprises a gravel layer on the waterfront surface, a gravel layer on the back water surface, a bagged soil ramming layer and a water passing area, the sludge sludge in the river channel bottom mud dredging area is reused in the waterfront ecological buffer zone, and the waterfront ecological buffer zone comprises a first buffer zone and a second buffer zone, and each buffer zone is stacked with geotube bags as a plant planting layer.

[0008] As a preferred technical solution, buffer zone wood piles are arranged between each buffer zone of the waterfront ecological buffer zone, and the water depth of each buffer zone is adjusted by a geotextile tube bag. Furthermore, the geotextile tube bag is filled with the scouring and silting bottom mud.

[0009] As a preferred technical solution, the water-passing area includes a water-passing area gravel layer and a drainage pipe, the water-passing area gravel layer is located in the bagged soil ramming layer, the drainage pipe sequentially penetrates the gravel layer on the water-facing surface, the water-passing area gravel layer and the back-water surface gravel layer, and the drainage pipe located in the water-passing area gravel layer is coated with a bentonite waterproof blanket. Furthermore, a screen is provided at the pipe port of the drainage pipe facing the upstream of the river section, and the drainage pipe is also provided with a regulating valve, which is located on the back-water surface.

[0010] As a preferred technical solution, interception dam piles are provided between the bagged soil rammed layer and the gravel layer on the water-facing side, and between the bagged soil rammed layer and the gravel layer on the water-receiving side, and emergent plants are also provided on the top of the bagged soil rammed layer.

[0011] As a preferred technical solution, the gravel layer on the back water surface includes boulders and forked branches.

[0012] As a preferred technical solution, the elevation of the top of the geotube bag in the first buffer zone is about 50-200 cm away from the normal water level of the river, and submerged plants and floating leaf plants are planted in the first buffer zone; the elevation of the top of the geotube bag in the second buffer zone is about 20-50 cm away from the normal water level of the river, and emergent plants are planted in the second buffer zone.

[0013] As a further preferred technical solution, the waterfront ecological buffer zone also includes a third buffer zone, the top elevation of the geotube bag in the third buffer zone is flush with the normal water level of the river channel, and the third buffer zone is planted with shrubs and wetland plants. Furthermore, a pinewood pile with a length of 2.5m-3.5m and a tip diameter of 5-10cm is arranged between the first buffer zone and the riverbed dredging area; a pinewood pile with a length of 2m and a tip diameter of 5-10cm is arranged between the second buffer zone and the first buffer zone, and between the third buffer zone and the second buffer zone.

[0014] As described above, the utility model has the following beneficial effects:

[0015] (1) The utility model is an ecological river channel system for reducing pollution and carbon emissions. By adopting ecological engineering methods, only temporary suction pumps and pile-driving boats are used during the construction phase. From implementation to later maintenance, basically no electrical equipment is used, thereby achieving energy conservation and emission reduction and reducing carbon emissions.

[0016] (2) The utility model is an ecological river channel system for reducing pollution and carbon emissions. By constructing a filtering interception dam at the connection between the upstream and downstream of the target river section, it can reduce pollution from external rivers entering the river and reduce the interference and damage of wild aquatic organisms from external rivers to the ecosystem in the target river section.

[0017] (3) The utility model is an ecological river channel system for reducing pollution and carbon emissions. By setting a water flow area inside the filtering and intercepting dam, using a drainage pipe that passes through the gravel layer on the water front side, the gravel layer in the water flow area and the gravel layer on the back water side, and a butterfly valve arranged above the drainage pipe, the free control of the water coming from the upstream of the river section is achieved, which not only ensures the normal flood discharge and drainage of the river channel, but also ensures the goal of river water safety.

[0018] (4) The utility model provides an ecological river system for reducing pollution and carbon emissions. The filtering and intercepting dam body adopts wooden piles, bagged soil, and HDPE bentonite waterproof blanket, which has good stability and improves the safety of the river system.

[0019] (5) The utility model provides an ecological river channel system for reducing pollution and carbon emissions. By setting a gravel layer on the water-facing side of the filtration interception dam, the impact of upstream water on the filtration interception dam during the flood season can be effectively reduced. In addition, by using large-size stones and setting forked branches on the back side of the filtration interception dam, a habitat is provided for micro-aquatic organisms in the river channel, which is beneficial to increasing the biodiversity of the river channel.

[0020] (6) The utility model is an ecological river system for reducing pollution and carbon emissions. In the riverbed silt desilting area, a suction pump is used to hydraulically flush the riverbed silt, thereby removing endogenous pollution in the silt. At the same time, the flushed silt is directly recycled to the waterfront ecological buffer zone as soil for plant planting, thus avoiding the additional occupation of surrounding land and external transportation. Compared with the traditional method of transporting sludge by vehicle, the utility model avoids carbon emissions generated during the transportation of sludge. At the same time, it also reduces carbon emissions that may be generated during the purchase and transportation of soil for plant planting, thereby improving resource utilization efficiency.

[0021] (7) The utility model is an ecological river channel system for reducing pollution and carbon emissions. By using geotextile tube bags to seal the riverbed silt, it not only reduces the unpleasant sensory experience brought to the surrounding residents during the silt drying process, but also improves the ecological benefits of the river water environment management process.

[0022] (8) The utility model is an ecological river channel system for reducing pollution and carbon emissions. It uses geotextile tube bags to dehydrate riverbed sludge without the need for large equipment and large amounts of electricity. While ensuring the efficiency of sludge treatment, it also has the advantages of energy conservation and emission reduction.

[0023] (9) The utility model is an ecological river channel system for reducing pollution and carbon emissions. The remaining solid materials sealed in the geotube bags are recycled as planting soil rich in organic matter. After the surface of the geotube bags is broken, aquatic plants can be directly planted, and then the photosynthesis of aquatic plants and the micro-ecological system formed by their roots are utilized to reduce pollutants such as organic matter, nitrogen, and phosphorus in the bottom mud, thereby further enhancing the self-purification capacity of the river channel ecosystem.

[0024] (10) The utility model is an ecological river system for reducing pollution and carbon emissions. By planting plants in the filtering interception dam and the waterfront ecological buffer zone, it not only greatly improves the river landscape effect, but also enhances the ecological benefits of the river, providing strong support for the sustainable development of the river ecosystem. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall layout of a pollution-reducing and carbon-reducing ecological river system of the utility model.

[0026] Figure 2It is a structural schematic diagram of an ecological filtration interception dam in a pollution-reducing and carbon-reducing ecological river system of the utility model.

[0027] Figure 3 It is a river channel design cross-sectional diagram of a pollution-reducing and carbon-reducing ecological river channel system of the utility model.

[0028] The specific description of the reference numerals is as follows:

[0029] 1. Filtration interception dam; 11. Interception dam piles; 12. Bentonite waterproof blanket; 13. Bag soil ramming layer; 14. Water-passing area; 141. Gravel layer in water-passing area; 142. Drain pipe; 143. Screen; 144. Regulating valve; 15. Gravel layer on the water-facing side; 16. Gravel layer on the back of the water; 161. Blocks; 162. Branches with forks; 2. Riverbed dredging area; 3. Waterfront ecological buffer zone; 31. Buffer zone piles; 311. Pine pile one; 312. Pine pile two; 32. Soil Work bag; 4. First buffer zone; 41. Submerged plant zone; 411. Evergreen dwarf Vallisneria; 412. Elodea; 413. Hydrilla verticillata; 42. Floating-leaf plants; 5. Second buffer zone; 51. Emergent plants; 511. Lythrum salicaria; 512. Cattail; 513. Iris; 514. Vetiver; 515. Pickerel grass; 6. Third buffer zone; 61. Wetland plant zone; 7. Target river section; 71. Upstream of the river section; 72. Downstream of the river section; 73. Normal water level of the river; 74. Riverbed. DETAILED DESCRIPTION

[0030] In order to better understand the purpose, structure and function of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] In the description of the present invention, it should be noted that the positional relationships indicated by terms such as “longitudinal”, “lateral”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” cited in this specification are based on the positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] Example

[0033] like Figure 1As shown, this embodiment provides an ecological river channel system for reducing pollution and carbon emissions, wherein the river channel includes an upstream river section 71, a target river section 7, and a downstream river section 72, wherein a river channel system is provided at the target river section 7, and the river channel system includes a filtering interception dam 1, a river channel bottom dredging area 2, and a waterfront ecological buffer zone 3. The filtering interception dam 1 is provided at the connection between the target river section 7 and the upstream river section 71, and between the target river section 7 and the downstream river section 72, and is used to isolate pollutants in the external river channel, and while reducing pollution from external rivers entering the river, it can also reduce the adverse effects of aquatic plants and animals on the ecosystem in the target river section 7. The waterfront ecological buffer zone 3 is located between the river channel bottom dredging area 2 and the riverbanks on both sides of the target river section 7.

[0034] like Figure 2 As shown, the filtration interception dam 1 includes a gravel layer 15 on the water surface, a gravel layer 16 on the back surface, a bagged soil rammed layer 13 and a water-passing area 14. Interception dam wooden piles 11 are arranged between the bagged soil rammed layer 13 and the gravel layer 15 on the water surface, and between the bagged soil rammed layer 13 and the gravel layer 16 on the back surface, and an emergent plant 51 is also arranged on the top of the bagged soil rammed layer 13; the gravel layer 16 on the back surface includes a block 161 and a branch 162 with a fork; the water-passing area 14 includes a water-passing area gravel layer 141 and a drainage pipe 142, the gravel layer 141 on the water surface is located in the bagged soil rammed layer 13, the drainage pipe 142 sequentially penetrates the gravel layer 15 on the water surface, the gravel layer 141 on the water-passing area and the gravel layer 16 on the back surface, and the drainage pipe 142 located in the gravel layer 141 on the water-passing area is coated with a bentonite waterproof blanket 12. The drain pipe 142 is provided with a screen 143 at the pipe end facing the upstream river section 71. The drain pipe 142 is also provided with a regulating valve 144. The regulating valve 144 is located on the back water side, and the manual adjustment part of the regulating valve 144 is higher than the normal water level line 73 of the target river section 7, which is convenient for controlling the incoming water from the upstream river section 71, thereby ensuring the normal flood discharge and drainage of the river and ensuring the goal of river water safety.

[0035] In this embodiment, the filtration interception dam 1 is mainly composed of pinewood piles with a length of 4.5m and a tip diameter of 5-10cm, HDPE bentonite waterproof blanket 12, bagged soil ramming layer 13, water-passing area 14, gravel layer 15 on the water-facing surface, gravel layer 16 on the back-facing surface, and emergent plants 51. It has good stability and improves the safety of the river system. Specifically, the water-passing area 14 is composed of a gravel layer with a particle size of 1-3cm, a DN200 HDPE drainage pipe 142, an 80-mesh stainless steel screen 143, and a manual butterfly valve; the back-facing gravel layer 16 is composed of blocks 161 with a particle size of 5-30cm and branches 162 with a diameter of 3-10cm and forked, which provides a habitat for micro-aquatic organisms in the river, which is conducive to increasing the biodiversity of the river; the gravel layer 15 on the water-facing surface is composed of gravel, which is used to reduce the impact of upstream water on the filtration interception dam 1 during the flood season.

[0036] The sludge from the riverbed silt desilting area 2 is reused in the waterfront ecological buffer zone 3. In actual work, a suction pump is used to hydraulically sludge the riverbed 74 of the riverbed silt desilting area 2 to remove endogenous pollution of the sludge, and the sludge is reused as plant planting soil in the buffer zone to the plant planting layer of the waterfront ecological buffer zone 3. Specifically, the sludge is treated and filled into the geotextile tube 32 for sealing and dehydration, which not only reduces the unpleasant sensory experience brought to the surrounding residents during the sludge drying process, but also improves the ecological benefits of the river water environment management process; and, through the treatment of the geotextile tube 32, the use of large equipment and the consumption of a large amount of electricity are avoided, which not only ensures the efficiency of sludge treatment, but also has the advantages of energy saving and emission reduction. During the implementation of the river system, after the surface of the geotube 32 is broken, the remaining solid matter of the sludge sealed in the geotube 32 can be reused as planting soil rich in organic matter, and aquatic plants can be directly planted. Then, the photosynthesis of aquatic plants and the micro-ecosystem formed by their roots can be utilized to reduce pollutants such as organic matter, nitrogen, and phosphorus in the sediment, further enhancing the self-purification capacity of the river ecosystem.

[0037] The waterfront ecological buffer zone 3 includes a first buffer zone 4 and a second buffer zone 5, buffer zone wood piles 31 are arranged between the buffer zones, geotube bags 32 as plant planting layers are piled in each buffer zone, and the water depth of each buffer zone is adjusted by the geotube bags 32. The top elevation of the geotube bags 32 in the first buffer zone 4 is about 50-200 cm away from the normal water level line 73 of the river channel, and the first buffer zone 4 is planted with submerged plant belts 41 and floating leaf plants 42; the top elevation of the geotube bags 32 in the second buffer zone 5 is about 20-50 cm away from the normal water level line 73 of the river channel, and the second buffer zone 5 is planted with emergent plants 51.

[0038] The waterfront ecological buffer zone 3 also includes a third buffer zone 6. The top elevation of the geotube bag 32 in the third buffer zone 6 is flush with the normal water level line 73 of the river. Shrubs and wetland plant belts 61 are planted in the third buffer zone 6, thereby beautifying the hard revetment of the river, attracting birds, increasing biodiversity, and improving the ecological benefits of the river bank.

[0039] In this embodiment, if Figure 3As shown, the waterfront ecological buffer zone 3 creates different water depth conditions for planting different types of plants in the river channel through buffer zone wood piles 31 and geotube bags 32. Specifically, the second buffer zone 5 and the first buffer zone 4 with water depths from shallow to deep are set at the north bank, and the third buffer zone 6, the second buffer zone 5 and the first buffer zone 4 with water depths from shallow to deep are set at the south bank. The first buffer zone 4 is arranged with a pine wood pile 311 with a length of 2.5m-3.5m and a tip diameter of 5-10cm near the center of the river channel; between the second buffer zone 5 and the first buffer zone 4, and between the third buffer zone 6 and the second buffer zone 5, there are pine wood piles 312 with a length of 2m and a tip diameter of 5-10cm. The first buffer zone 4 is a submerged floating leaf plant 42 planting area, planted with submerged plant belts 41 and floating leaf plants 42; the submerged plant 41 is configured with selected varieties according to the location of the river system. Taking the hot summer and cold winter area, the hot summer and warm winter area and the mild area as examples, the submerged plants are mainly planted in strips with evergreen dwarf Vallisneria 411, Elodea 412, and Hydrilla verticillata 413; the floating leaf plants 42 are mainly water lilies or water poppies. The second buffer zone 5 is an emergent plant 51 planting area, with emergent plants 51 planted in strips; the emergent plant 51 is configured with selected varieties according to the location of the river system. Taking the hot summer and cold winter area, the hot summer and warm winter area and the mild area as examples, the emergent plants 51 are mainly planted with sea longevity flower or Lythrum salicaria 511, reed or cattail 512, canna or iris 513, vetiver 514, and pickerel grass 515. The third buffer zone 6 is a shrub wetland plant planting area, where a wetland plant belt 61 is planted and dotted with perennial small shrubs.

[0040] All the above-mentioned wooden piles located in the river system are driven by pile-driving ships, and each pile driving operation is completed during the initial construction process of the river system. The specific pile driving operation belongs to conventional technology and will not be described in detail here.

[0041] The above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. It is known to those skilled in the art that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the utility model.

Claims

1. A pollution reduction and carbon reduction ecological river system, the river comprising an upstream river section (71), a target river section (7) and a downstream river section (72), characterized in that: The invention comprises a filtering interception dam (1), a riverbed silt desilting area (2) and a waterfront ecological buffer zone (3). The filtering interception dam (1) is arranged at the connection between a target river section (7) and an upstream river section (71), and between the target river section (7) and a downstream river section (72). The waterfront ecological buffer zone (3) is located between the riverbed silt desilting area (2) and the riverbanks on both sides of the target river section (7). The filtering interception dam (1) comprises a gravel layer (15) on the waterfront surface, a gravel layer (16) on the back waterfront surface, a bagged soil ramming layer (13) and a water passing area (14). The sludge from the riverbed silt desilting area (2) is recycled into the waterfront ecological buffer zone (3). The waterfront ecological buffer zone (3) comprises a first buffer zone (4) and a second buffer zone (5). Geotube bags (32) serving as a plant planting layer are stacked in each buffer zone.

2. The pollution-reducing and carbon-reducing ecological river system according to claim 1 is characterized in that: Buffer zone wood piles (31) are arranged between each buffer zone of the waterfront ecological buffer zone (3), and the water depth of each buffer zone is adjusted by a geotextile tube bag (32).

3. The pollution-reducing and carbon-reducing ecological river system according to claim 2 is characterized in that: The geotube bag (32) is filled with the scouring and silting mud.

4. The pollution-reducing and carbon-reducing ecological river system according to claim 3 is characterized in that: The water-passing area (14) comprises a water-passing area gravel layer (141) and a drainage pipe (142); the water-passing area gravel layer (141) is located in the bagged soil ramming layer (13); the drainage pipe (142) sequentially penetrates the water-facing surface gravel layer (15), the water-passing area gravel layer (141) and the water-receiving surface gravel layer (16); and the drainage pipe (142) located in the water-passing area gravel layer (141) is coated with a bentonite waterproof blanket (12).

5. The pollution-reducing and carbon-reducing ecological river system according to claim 4 is characterized in that: A screen (143) is provided at the pipe end of the drainage pipe (142) facing the upstream river section (71), and the drainage pipe (142) is also provided with a regulating valve (144), and the regulating valve (144) is located on the back water surface.

6. The pollution-reducing and carbon-reducing ecological river system according to claim 5 is characterized in that: Intercepting dam wood piles (11) are arranged between the bagged soil rammed layer (13) and the gravel layer (15) on the water-facing side, and between the bagged soil rammed layer (13) and the gravel layer (16) on the water-receiving side. Emergent plants (51) are also arranged on the top of the bagged soil rammed layer (13).

7. The pollution-reducing and carbon-reducing ecological river system according to claim 5 is characterized in that: The back-water gravel layer (16) includes boulders (161) and forked branches (162).

8. A pollution reduction and carbon reduction ecological river system according to any one of claims 1 to 7, characterized in that: The top elevation of the geotube bag (32) in the first buffer zone (4) is about 50-200 cm away from the normal water level line (73) of the river channel, and submerged plants (41) and floating leaf plants (42) are planted in the first buffer zone (4); the top elevation of the geotube bag (32) in the second buffer zone (5) is about 20-50 cm away from the normal water level line (73) of the river channel, and emergent plants (51) are planted in the second buffer zone (5).

9. The pollution-reducing and carbon-reducing ecological river system according to claim 8, characterized in that: The waterfront ecological buffer zone (3) also includes a third buffer zone (6), the top elevation of the geotube bag (32) in the third buffer zone (6) is flush with the normal water level line (73) of the river channel, and shrubs and wetland plant belts (61) are planted in the third buffer zone (6).

10. The pollution-reducing and carbon-reducing ecological river system according to claim 9, characterized in that: A pinewood pile (311) with a length of 2.5m-3.5m and a tip diameter of 5-10cm is arranged between the first buffer zone (4) and the riverbed dredging area (2); a pinewood pile (312) with a length of 2m and a tip diameter of 5-10cm is arranged between the second buffer zone (5) and the first buffer zone (4), and between the third buffer zone (6) and the second buffer zone (5).

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