Drop dam for ecological management and purification of scouring-resistant water body of riverway

Abstract

The ecological management and purification drop dam has the following beneficial effects that (1) planting bricks and a water and soil protection blanket have the effects of fixing soil, resisting scouring, protecting seedling roots and fixing seedlings, so that scouring and damage of river water flow to planting matrixes and aquatic plants are reduced, the survival rate of the aquatic plants is increased, and the water quality is improved; (2) the multi-stage drop dam can prolong the water body absorption and purification time of aquatic plants and microorganisms and improve the absorption and purification effect; (3) absorbing and purifying the water body by using aquatic plants and microorganisms, increasing the oxygen content of the water body during water stacking of the multi-stage drop dam, and enhancing the water body purification capacity; and (4) the multi-stage drop dam can effectively intercept the upstream water body and prolong the absorption and purification time for aquatic plants and microorganisms, and meanwhile, the water flow flows through the multi-stage drop dam, the planting bricks, the emergent aquatic plants, the artificial aquatic plants and the like, so that a certain energy dissipation effect is achieved, the scouring of the preliminarily purified water body to the downstream riverbed is relieved, and the pollution to the downstream water body is relieved.

Description

Technical Field

[0001] This utility model relates to the field of water ecological governance technology, specifically to a scour-resistant, ecologically sound, and purifying drop dam for river water bodies. Background Technology

[0002] With the deepening of the concept of water ecological governance, aquatic plants, due to their dual value in ecological restoration and landscape creation, have gradually become one of the core means of river management. However, because river water is in a flowing state, when the water flow velocity is high, the stems and leaves of aquatic plants are impacted by the water flow, which carries away sediments at the bottom. Bottom mud is easily stirred up and suspended in the water, so the river flow has varying degrees of scouring and damage to planting substrates and aquatic plants. On the other hand, aquatic plants can degrade organic pollutants in the water through metabolism and symbiotic relationships with microorganisms, but due to the influence of water flow, pollutants in the water are quickly carried away by the water flow, and aquatic plants and microorganisms may not have enough time for biodegradation, affecting the absorption and purification effect of aquatic plants and microorganisms. At the same time, there are many types of pollutants in the upstream of the river. If the upstream water is not effectively purified, it will lead to the aggravation of pollution in the downstream water.

[0003] In summary, the existing river management methods have the following problems:

[0004] (1) After laying the planting substrate in the river channel, aquatic plants are planted directly. The river water flow has a certain degree of scouring and damage to the planting substrate and aquatic plants, affecting the survival rate of aquatic plants and the water quality.

[0005] (2) Pollutants in the water flow with the water flow, affecting the absorption and purification effect of aquatic plants and microorganisms.

[0006] (3) Existing drop dams have the function of energy dissipation and landscaping. They rely on the height difference to increase the oxygen content in the water during the drop process, but the water purification capacity is limited.

[0007] (4) There are many types of pollution in the upper reaches of the river and the river is in a flowing state. Polluted water is easy to accumulate in the lower reaches. If the upstream polluted water is not purified in time, it will aggravate the pollution in the lower reaches. Utility Model Content

[0008] (a) Technical problems to be solved

[0009] In view of the shortcomings of the existing technology, this utility model aims to provide a landscape drop dam structure that is resistant to water flow erosion, prolongs the water contact time, has an energy dissipation effect, increases the oxidation-reduction potential of water, and enhances water purification. Through scientific and reasonable planning and planting, it can not only effectively improve the water quality of the river, but also enhance the ecological environment quality of the river.

[0010] (II) Technical Solution

[0011] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a river channel erosion-resistant ecological treatment and purification drop dam, comprising a multi-stage drop dam, wherein the multi-stage drop dam includes a first-stage drop platform, a first-stage drop slope, a second-stage drop platform, a second-stage drop slope, a third-stage drop platform, a third-stage drop slope, and a slope; the first-stage drop slope connects the first-stage drop platform and the second-stage drop platform, the second-stage drop slope connects the second-stage drop platform and the third-stage drop platform, the third-stage drop slope connects the third-stage drop platform and the downstream deep water area, and the slope connects the first-stage drop platform and the upstream deep water area; planting bricks are laid on the first-stage drop platform, the second-stage drop platform, the third-stage drop platform, the upstream deep water area, and the downstream deep water area, wherein planting substrate and soil and water protection blanket are contained in the planting bricks; artificial aquatic plants are installed on the first-stage drop slope, the second-stage drop slope, the third-stage drop slope, and the slope.

[0012] Preferably, the first-level, second-level, and third-level waterfall ramps are all stepped structures.

[0013] Preferably, a first cement column is installed on the side of the upstream deep water area away from the slope, the side of the first-level drop platform close to the slope, and the side of the downstream deep water area away from the third-level drop slope, wherein the height of the first cement column is the same as the height of the planting brick.

[0014] Preferably, a second cement column is provided on the side of the first-level waterfall platform near the first-level waterfall slope, the side of the second-level waterfall platform near the second-level waterfall slope, and the side of the third-level waterfall platform near the third-level waterfall slope, wherein the height of the second cement column is higher than the height of the planting brick.

[0015] Preferably, the planting brick has perforated holes, the planting substrate is placed inside the perforated holes, and the soil and water protection blanket is wrapped by the planting substrate and placed inside the perforated holes.

[0016] Preferably, the planting bricks of the first-level cascade platform are planted with emergent plants, the planting bricks of the second-level and third-level cascade platforms are planted with emergent or submerged plants, and the planting bricks of the upstream deep water area and the downstream deep water area are planted with submerged plants.

[0017] Preferably, the slope is fixed with expansion bolts, and steel wire ropes are wound around the expansion bolts, with artificial aquatic plants suspended on the steel wire ropes.

[0018] Preferably, the total height of the multi-stage drop dam is 18-40 cm below the normal water level.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, this utility model provides a scour-resistant water body ecological treatment and purification drop dam for river channels, which has the following beneficial effects: (1) This utility model lays planting bricks in the river channel, and places planting substrate and soil and water protection blankets inside the planting bricks. The planting bricks and soil and water protection blankets have the functions of soil fixation, scour resistance, seedling root protection, and seedling fixation, reducing the scour and damage of river water flow to planting substrate and aquatic plants, improving the survival rate of aquatic plants and improving water quality; (2) The multi-stage drop dam of this utility model has the functions of water interception and energy dissipation, which can prolong the water contact time, prolong the absorption and purification time of aquatic plants and microorganisms on the water body, and improve the absorption and purification effect; (3) (4) This utility model combines planting bricks, soil and water protection blankets, aquatic plants (submerged plants and emergent plants), multi-stage cascade dams and artificial aquatic plants, etc., to absorb and purify water bodies using aquatic plants and microorganisms. At the same time, the multi-stage cascade dam increases the oxygen content of the water body when it cascades, and the multi-faceted synergistic effect enhances the water body purification capacity; (5) This utility model sets up multi-stage cascade dams, which can effectively intercept upstream water bodies, extend the absorption and purification time for aquatic plants and microorganisms, and at the same time, the water flow through multi-stage cascade dams, planting bricks, emergent plants, artificial aquatic plants, etc. has a certain energy dissipation effect, and the water body that has been initially purified slows down the scouring of the downstream riverbed and reduces the pollution of the downstream water body. Attached Figure Description

[0021] Figure 1 This is a top view of a drop dam for ecological treatment and purification of river water bodies that is resistant to scour;

[0022] Figure 2 This is a three-dimensional view of a drop dam for ecological treatment and purification of river water bodies that is resistant to scour;

[0023] Figure 3 This is a side view of a drop dam for ecological treatment and purification of river water bodies that is resistant to scour;

[0024] Figure 4 This is a perspective view of the multi-stage drop dam of this utility model;

[0025] Figure 5 This is a three-dimensional view of the artificial aquatic plants suspended on the first-level waterfall slope of this utility model;

[0026] Figure 6 This is a three-dimensional view of the artificial aquatic plant of this utility model;

[0027] Figure 7 This is a three-dimensional view of the planting brick and submerged plants of this utility model;

[0028] Figure 8 This is a three-dimensional view of the planting brick and emergent plants of this utility model.

[0029] The diagram is labeled as follows: 1 Riverbed, 2 Revetment, 3 Multi-stage cascade dam, 301 First-stage cascade platform, 302 First-stage cascade slope, 303 Second-stage cascade platform, 304 Second-stage cascade slope, 305 Third-stage cascade platform, 306 Third-stage cascade slope, 307 Slope, 4 Planting bricks, 5 Soil and water protection blanket, 6 Planting substrate, 7 First cement pillar, 8 Second cement pillar, 9 Submerged plants, 10 Emerging plants, 11 Expansion bolts, 12 Steel wire rope, 13 Artificial aquatic plants, 14 Upstream deep water area, 15 Downstream deep water area. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides a riprap dam for ecological treatment and purification of river water bodies with erosion resistance, including a multi-stage riprap dam 3, wherein the multi-stage riprap dam 3 includes a first-stage riprap platform 301, a first-stage riprap slope 302, a second-stage riprap platform 303, a second-stage riprap slope 304, a third-stage riprap platform 305, a third-stage riprap slope 306, and a slope 307.

[0032] The first-level waterfall platform 301, the second-level waterfall platform 303, the third-level waterfall platform 305, the upstream deep water area 14 and the downstream deep water area 15 are all paved with planting bricks 4, among which planting substrate 6 and soil and water protection blanket 5 are installed inside the planting bricks 4; the first-level waterfall slope 302, the second-level waterfall slope 304, the third-level waterfall slope 306 and the slope 307 are all equipped with artificial aquatic plants 13.

[0033] The multi-stage drop dam 3 of this invention is installed on the riverbed 1 of a river channel. The riverbed 1 is the bottom portion of the river channel, the area where the river water contacts the riverbed, and is mainly composed of silt and sediment, providing habitat for fish and other aquatic organisms. Furthermore, the multi-stage drop dam 3 of this invention is located between two revetments 2, which are used to protect the stability of the river channel, prevent riverbank collapse and erosion, and maintain the ecological balance of the river channel.

[0034] Specifically, the multi-stage drop dam 3 of this utility model is a reinforced concrete structure. The river channel is 2-5m deep. The total height of the multi-stage drop dam 3 can be 18-40cm lower than the normal water level. The multi-stage drop dam 3 has the functions of energy dissipation, protection of the downstream riverbed, improvement of water flow, oxygenation of water body, and providing a growth platform for aquatic plants.

[0035] The first-level cascading platform 301 is a component of the multi-level cascading dam 3. It is the first-level absorption and purification platform. The upper part of the first-level cascading platform 301 is paved with planting bricks 4 and planted with emergent plants 10. The first-level cascading platform 301 provides more time for the aquatic plants and microorganisms in the area to absorb and purify harmful substances. The width of the first-level cascading platform 301 can be 2-10m.

[0036] The first-stage cascading ramp 302 is a component of the multi-stage cascading dam 3. The first-stage cascading ramp 302 connects the first-stage cascading platform 301 and the second-stage cascading platform 303. It is preferably a stepped structure. The first-stage cascading ramp 302 can not only create a cascading water pattern to enhance the landscape effect, but also enhance the energy dissipation effect of the water flow.

[0037] The secondary waterfall platform 303 is a component of the multi-stage waterfall dam 3. It is the second-stage absorption and purification platform. The upper part of the secondary waterfall platform 303 is paved with planting bricks 4 and emergent plants 10 or submerged plants 9 are selected according to the water level and depth. The secondary waterfall platform 303 provides more time for the aquatic plants and microorganisms in the area to absorb and purify harmful substances. The width of the secondary waterfall platform 303 can be 2-10m, and its height is 0.5-1.5m lower than that of the primary waterfall platform.

[0038] The secondary waterfall ramp 304 is a component of the multi-stage waterfall dam 3. The secondary waterfall ramp 304 connects the secondary waterfall platform 303 and the tertiary waterfall platform 305. It is preferably a stepped structure. The secondary waterfall ramp 304 can not only create a cascading water pattern to enhance the landscape effect, but also enhance the energy dissipation effect of the water flow.

[0039] The third-level cascading platform 305 is a component of the multi-level cascading dam 3. It is the third-level absorption and purification platform. The upper part of the third-level cascading platform 305 is paved with planting bricks 4 and emergent plants 10 or submerged plants 9 are selected according to the water level and depth. The third-level cascading platform 305 provides more time for aquatic plants and microorganisms in the area to absorb and purify harmful substances. The width of the third-level cascading platform 305 can be 2-10m, and its height is 0.5-1.5m lower than that of the second-level cascading platform.

[0040] The three-tiered cascading ramp 306 is a component of the multi-tiered cascading dam 3. The three-tiered cascading ramp 306 connects the three-tiered cascading platform 305 and the downstream deep water area 15. It is preferably a stepped structure. The three-tiered cascading ramp 306 can not only create a cascading water pattern to enhance the landscape effect, but also enhance the energy dissipation effect of the water flow.

[0041] Slope 307 is a component of the multi-stage drop dam 3. Slope 307 connects the first-stage drop platform 301 and the upstream deep water area 14. It is a slope structure. The height of slope 307 is the same as that of the first-stage drop platform, and its slope can be 1:2-1:5.

[0042] Both the upstream deep water area 14 and the downstream deep water area 15 have submerged plants 9 planted in the planting bricks 4. The submerged plants 9 can specifically be evergreen dwarf Vallisneria natans, Hydrilla verticillata, or Diplodocus simonii, with a planting density of 120 plants / m². 2 Depending on the water depth, plants should be selected and placed within planting bricks 4. These plants can absorb and transform pollutants in the water, purifying the water quality. Emergent plants 10 can include canna lilies, irises, calamus, thaliana, and cattails, with a planting density of 27 plants / m². 2 Depending on the water depth, plants are selected to be planted within planting bricks 4. They can absorb and transform pollutants in the water, purifying the water quality.

[0043] Preferably, the planting brick 4 is a hollow brick with a perforated hole. The length of the perforated hole is 20-40cm, the thickness of the brick is 4-5cm, and the height is 8-10cm. The material of the planting brick 4 is preferably cement. The planting brick 4 has the functions of water retention, soil stabilization, and erosion resistance. The perforated design provides a good planting space for the growth of aquatic plants.

[0044] Specifically, the soil and water protection blanket 5 is wrapped by the planting substrate 6 and placed inside the perforated holes of the planting brick 4. The soil and water protection blanket 5 is preferably made of polyamide and has the functions of soil stabilization, erosion resistance, root protection, and seedling stabilization. The planting substrate 6 can be selected from planting soil, expanded clay pebbles, or gravel. Placing the planting substrate 6 inside the perforated holes of the planting brick 4 provides support for the root system of aquatic plants, supplies water and nutrients to aquatic plants, and ensures that aquatic plants are firmly established within the planting brick during their growth.

[0045] In this embodiment, a first cement column 7 is provided on the side of the upstream deep water area 14 away from the slope 307, the side of the first-level drop platform 301 close to the slope 307, and the side of the downstream deep water area 15 away from the third-level drop slope 306. The height of the first cement column 7 is the same as the height of the planting brick 4. That is, three first cement columns 7 are provided in this embodiment. The first cement columns 7 are used to fix the position of the planting brick 4 and prevent the planting brick 4 from shifting.

[0046] In this embodiment, a second cement column 8 is provided on the side of the first-level waterfall platform 301 near the first-level waterfall slope 302, the side of the second-level waterfall platform 303 near the second-level waterfall slope 304, and the side of the third-level waterfall platform 305 near the third-level waterfall slope 306. That is, the second cement column 8 is located at the intersection of the waterfall platform and the waterfall slope. In this embodiment, a total of three second cement columns 8 are provided. The height of the second cement column 8 is 10-30cm higher than the height of the planting brick 4. The second cement column 8 is used to prevent the planting brick 4 from shifting and to intercept water to prolong the absorption and purification time of aquatic plants.

[0047] Preferably, the slope 307 is fixed with multiple expansion bolts 11, and steel wire ropes 12 are wound around the expansion bolts 11. The expansion bolts 11 provide the winding and fixing points for the steel wire ropes 12. Two steel wire ropes 12 form a suspended frame, and the two ends of the artificial aquatic plants 13 are suspended and fixed to the steel wire ropes 12. The steel wire ropes 12 can be made of SUS304, and their diameter can be 6-16mm. The artificial aquatic plants 13 are suspended intermittently on the steel wire ropes 12. The artificial aquatic plants 13 provide a substrate for microorganisms to attach and grow, enhancing the microbial treatment effect. They also generate some resistance when the river water flows through them, thus having a certain energy dissipation effect. Furthermore, the first-stage cascade slope 302, the second-stage cascade slope 304, and the third-stage cascade slope 306 can also be equipped with artificial aquatic plants 13 suspended using the same expansion bolts 11 and steel wire ropes 12.

[0048] It is understood that this utility model combines planting bricks 4, soil and water protection blankets 5, aquatic plants (submerged plants and emergent plants), multi-stage drop dams 3 and artificial aquatic plants 13 to construct a drop dam structure for ecological governance and purification of river water that is resistant to scour. The working principle of each structure is as follows: (1) Soil and water protection blankets 5 and planting substrates 6 are laid in the hollow holes of planting bricks 4. Planting bricks 4 can resist a certain scour force of water flow, thereby ensuring the stability of soil and water protection blankets 5 and planting substrates 6 in the hollow holes. While resisting river scour, it provides a stable growth space for aquatic plants. (2) The upstream water flow is blocked by the multi-stage drop dams 3, and the water body is intercepted. The submerged plants in the deep water area 14 of the upstream have more time to absorb and transform pollutants in the water body, and the water body is initially purified. (3) When the water level gradually rises and overflows the multi-stage drop dam 3, the water reaches the normal water level. The water flows through each drop platform and drop slope in layers. The pollutants are further absorbed and purified by the action of aquatic plants and microorganisms. At the same time, the energy dissipation effect of the water flow is further enhanced by the action of the planting bricks and drop slopes, which greatly reduces the scouring of the downstream riverbed and avoids the aggravation of downstream pollution. (4) When the water flows through the steps of the drop slope, a cascading effect is generated. The difference in flow velocity between the water layers will generate eddies, which increases the contact time and contact area between water and air, allowing the surface water and the bottom water to exchange oxygen and increase the dissolved oxygen content in the water. (5) Artificial aquatic plants 13 are set on the slope 307 of the multi-stage drop dam 3 and each drop slope. When the water flows through, microorganisms attach and grow and form a biofilm. The microorganisms efficiently degrade the pollutants in the water, thereby purifying the water quality. When the water flow is weak or absent, the artificial aquatic plants 13 have strong adaptability and durability and do not require the help of water flow to grow or maintain their shape. Through the above comprehensive considerations, this utility model can provide a landscape drop dam structure that is resistant to water flow erosion, extends the water contact time, has an energy dissipation effect, increases the oxidation-reduction potential of water, and enhances water purification. It can not only effectively improve the water quality of the river, but also enhance the ecological environment quality of the river, thereby achieving the sustainable development of the river.

[0049] Specifically, the construction and operation process of the erosion-resistant ecological water treatment and purification drop dam of this utility model can be as follows: (1) Construct an erosion-resistant ecological water treatment and purification drop dam in the polluted river. Construct a multi-stage drop dam 3 in the river, specifically including the construction of a first-stage drop platform 301, a first-stage drop slope 302, a second-stage drop platform 303, a second-stage drop slope 304, a third-stage drop platform 305, a third-stage drop slope 306, and a slope 307. (2) Fix steel wire ropes 12 on the slope 307 and each stage of the drop slopes with expansion bolts 11, and suspend artificial aquatic plants 13 at intervals on the steel wire ropes 12. (3) Lay planting bricks 4 in the upstream deep water area 14, the downstream deep water area 15, and each stage of the drop platform, and lay planting substrate 6 and soil and water protection blanket 5 in the hollow holes of the planting bricks 4. According to the water depth, submerged plants 9 are planted in the planting bricks 4 of the upstream deep water area 14 and the downstream deep water area 15, emergent plants 10 are planted in the planting bricks 4 of the first-level waterfall platform 301, and emergent plants 10 or submerged plants 9 are selected to be planted in the planting bricks 4 of the second-level waterfall platform 303 and the third-level waterfall platform 305. The roots of aquatic plants (submerged plants 9 and emergent plants 10) grow in the planting substrate 6 and grow around the soil and water protection blanket 5, which is conducive to the growth and fixation of aquatic plants. (4) When the upstream water comes, the water flow is blocked by the slope of the multi-level waterfall dam 3 and the water flow converges in the upstream deep water area 14. The submerged plants 9 in the upstream deep water area 14 absorb and transform pollutants in the water. Microorganisms grow on the artificial aquatic plants 13 on the slope 307 and effectively remove pollutants in the water. Under the joint action of submerged plants 9 and microorganisms, the upstream water is initially purified. (5) As the water flow gradually rises and overflows the multi-tiered cascade dam 3, the water flows into the first-tier cascade platform 301. Blocked by the second cement column 8, the water flow converges on the first-tier cascade platform 301. The emergent plants 10 in the first-tier cascade platform 301 absorb and transform pollutants in the water. As the water flow gradually rises and overflows the second cement column 8, the water reaches the normal water level. The water flows down the steps of the first-tier cascade slope 302. Microorganisms grow on the artificial aquatic plants 13 on the first-tier cascade slope 302 and effectively remove pollutants from the water. (6) Subsequently, the water flows through the second-tier cascade platform 303, the second-tier cascade slope 304, the third-tier cascade platform 305, and the third-tier cascade slope 306 in sequence. The water is purified and reoxygenated, and energy dissipation is achieved, reducing scouring and pollution to the downstream area. (7) Finally, the water flows downstream, and the submerged plants 9 in the deep water area 15 downstream absorb and transform the pollutants in the water, further purifying the river water and enhancing the ecological landscape of the river.

[0050] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A type of riprap dam for ecological treatment and purification of river water bodies with resistance to erosion, characterized in that: It includes a multi-stage drop dam, wherein the multi-stage drop dam includes a first-stage drop platform, a first-stage drop slope, a second-stage drop platform, a second-stage drop slope, a third-stage drop platform, a third-stage drop slope, and a slope; The first-level waterfall ramp connects the first-level waterfall platform and the second-level waterfall platform; the second-level waterfall ramp connects the second-level waterfall platform and the third-level waterfall platform; the third-level waterfall ramp connects the third-level waterfall platform and the downstream deep water area; and the ramp connects the first-level waterfall platform and the upstream deep water area. The first-level waterfall platform, the second-level waterfall platform, the third-level waterfall platform, the upstream deep water area, and the downstream deep water area are all paved with planting bricks, wherein the planting bricks contain planting substrate and soil and water protection blankets; the first-level waterfall slope, the second-level waterfall slope, the third-level waterfall slope, and the slope are all equipped with artificial aquatic plants.

2. The riprap dam for ecological treatment and purification of river water bodies according to claim 1, characterized in that: The first-level, second-level, and third-level waterfall slopes are all stepped structures.

3. The riprap dam for ecological treatment and purification of river water bodies according to claim 1, characterized in that: A first cement column is provided on the side of the upstream deep water area away from the slope, the side of the first-level waterfall platform close to the slope, and the side of the downstream deep water area away from the third-level waterfall slope. The height of the first cement column is the same as the height of the planting brick.

4. The riprap dam for ecological treatment and purification of river water bodies according to claim 3, characterized in that: A second cement column is provided on the side of the first-level waterfall platform near the first-level waterfall slope, the side of the second-level waterfall platform near the second-level waterfall slope, and the side of the third-level waterfall platform near the third-level waterfall slope. The height of the second cement column is higher than the height of the planting brick.

5. The riprap dam for ecological treatment and purification of river water bodies according to claim 1, characterized in that: The planting brick has perforated holes, the planting substrate is placed inside the perforated holes, and the soil and water protection blanket is wrapped by the planting substrate and placed inside the perforated holes.

6. The riprap dam for ecological treatment and purification of river water bodies according to claim 1, characterized in that: The planting bricks of the first-level cascading platform are planted with emergent plants, the planting bricks of the second-level and third-level cascading platforms are planted with either emergent or submerged plants, and the planting bricks of the upstream deep water area and the downstream deep water area are planted with submerged plants.

7. The riprap dam for ecological treatment and purification of river water bodies according to claim 1, characterized in that: The slope is fixed with expansion bolts, and steel wire ropes are wound around the expansion bolts. The artificial aquatic plants are suspended on the steel wire ropes.

8. The riprap dam for ecological treatment and purification of river water bodies according to claim 1, characterized in that: The total height of the multi-stage drop dam is 18-40 cm below the normal water level.

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