A design method for reshaping the rainwater wetland landscape system along Dianchi Lake

Abstract

This invention patent discloses a design method for reshaping the rainwater wetland landscape system along Dianchi Lake, including: constructing a rainwater wetland system and creating an ecological revetment system. The rainwater wetland system includes at least a four-level system, a set of galvanized steel wire mesh, a sedimentation pond outlet ditch, two sets of fir piles, and an outlet overflow weir. The creation of the ecological revetment system includes three methods. By utilizing the storage and retention of rainwater to create diverse site conditions, the growth of different types of plant communities is enriched, thereby creating diverse habitats for flora and fauna. Through artistic treatment, the basic functions of the rainwater wetland and landscape creation are considered together. The natural combination of plant communities forms a beautiful waterscape and wetland landscape. Through multi-level retention and filtration, rainwater and pollutants in Dianchi Lake are purified through plant absorption and microbial degradation. The rainwater wetland landscape system along Dianchi Lake is reshaped, thereby restoring the ecological environment of Dianchi Lake.

Description

Technical Field

[0001] This invention patent relates to rainwater wetland landscape design, and more particularly to a design method for reshaping the rainwater wetland landscape system along Dianchi Lake. Background Technology Summary of the Invention

[0002] This invention provides a method for reshaping the rainwater wetland landscape system along Dianchi Lake. Through the construction of the rainwater wetland system and the creation of the ecological revetment system, a rainwater wetland landscape system integrating landscape and ecology along Dianchi Lake is realized.

[0003] To achieve the above objectives, the present invention provides the following technical solution:

[0004] A design method for reshaping the rainwater wetland landscape system along Dianchi Lake includes the following steps: supplying water to the ecological revetment system through the rainwater wetland system.

[0005] The pretreatment system in the rainwater wetland system connects the seaweed water lift pump to the seaweed water, which is then transported to the inlet energy dissipation tank, mixed with municipal water transported by the municipal water pipe, and transported to the sedimentation pond inlet water distribution ditch for filtration through galvanized steel wire mesh. The water is then connected to the sedimentation pond and transported to the rainwater purification system through the sedimentation pond outlet water distribution ditch.

[0006] The rainwater purification system transports the water from the sedimentation pond's outlet distribution ditch to the wet pond. The system uses cedar wood stakes inserted at both ends of the sedimentation pond's outlet distribution ditch to separate the wetland treatment unit, which then treats the water in the wet pond.

[0007] The water treated by the wetland treatment unit is transported to the filter tank through a connecting pipe via a filtration system, and the filter tank is separated from the buffer tank by cedar piles.

[0008] The water treated by the filtration pond is transported to the buffer pond through the connecting pipe via the buffer system, and then connected to the Caohai Lake of Dianchi Lake through the overflow weir, supplying water to the ecological revetment system along the way.

[0009] Preferably, the construction of the ecological revetment system includes three methods;

[0010] The first type of ecological revetment system consists of a protective forest belt, an ecological planting belt, and a rainwater system pond from top to bottom;

[0011] The second type of ecological revetment system consists of a revetment forest belt, a gravel breakwater, an ecological planting belt, a gentle slope leading into the water, a demolished hard retaining wall, an underwater buffer zone, and a water body, arranged from top to bottom.

[0012] The third type of ecological revetment system consists of a protective forest belt, an ecological planting belt along the pond embankment, a gentle slope leading into the water, and a rainwater system pond, arranged from top to bottom.

[0013] Preferably, the rainwater wetland system includes, from top to bottom, a pretreatment system, a rainwater purification system, and a filtration system;

[0014] The pretreatment system includes a grass-sea water lifting pump, which is connected to the inlet water distribution ditch of the sedimentation pond. The inlet water distribution ditch of the sedimentation pond is connected to the sedimentation pond, and a galvanized steel wire mesh is set between the inlet water distribution ditch of the sedimentation pond and the sedimentation pond. The sedimentation pond is connected to the outlet water ditch of the sedimentation pond.

[0015] The rainwater purification system includes a wet pond, which is connected to the outlet ditch of a sedimentation pond. Fir wood stakes are installed at both ends of the outlet ditch of the sedimentation pond to separate the sedimentation pond from the wet pond. The wet pond is connected to the wetland treatment unit through a connecting pipe, and the wet pond and the connecting pipe are equipped with fir wood stakes.

[0016] The filtration system includes a connecting pipe that connects the filtration pool to the wetland treatment unit. A buffer system is separated from the filtration system by cedar piles. The buffer system includes a buffer pool that is connected to the filtration pool via the connecting pipe and connected to the Caohai Lake in Dianchi Lake via an overflow weir.

[0017] Preferably, in the first method of the ecological revetment system, a revetment forest belt is first set up, and an ecological planting belt of pond embankment is planted at the lower end of the revetment forest belt, with a rainwater system pond set up at the lower end of the ecological planting belt.

[0018] Preferably, in the second method of the ecological revetment system, a revetment forest belt is first set up, a rocky shoal drawdown zone is connected to the lower end of the revetment forest belt, an ecological planting zone is set up at the lower end of the rocky shoal drawdown zone, and the stones from the demolished stone wall of the original revetment are stacked and connected to the underwater buffer zone.

[0019] Preferably, the three methods of the ecological revetment system first involve setting up a revetment forest belt, planting an ecological planting belt on the pond embankment at the lower end of the revetment forest belt, and then transporting rainwater into the rainwater system pond through the gentle slope leading into the water.

[0020] Preferably, the rainwater wetland system is provided with a set of galvanized steel wire mesh, a sedimentation pond outlet ditch, two sets of fir piles, three connecting pipes, and an outlet overflow weir in sequence. The galvanized steel wire mesh is located on the gentle slope of the sedimentation pond inlet distribution ditch, and the height of the galvanized steel wire mesh should be greater than the normal water level of the sedimentation pond. The sedimentation pond outlet ditch includes, from bottom to top, a reinforced concrete foundation, two rows of closely spaced fir piles with anti-corrosion treatment, and two layers of anti-corrosion treated fir wood. The closely spaced fir piles are located between the two rainwater systems. Each fir pile is 3100mm long and 120mm in diameter, and the part embedded in the soil is coated with asphalt. The connecting pipes are located between wetland treatment units, between wetland treatment units and filter tanks, and between filter tanks and buffer tanks. The connecting pipes are steel pipes with a diameter of 800mm, and gratings are installed on both sides of the steel pipe openings. The outlet overflow weir is located between the buffer tank and the water body, and the outlet overflow weir includes, from bottom to top, a crushed stone cushion layer, a concrete cushion layer, a rubble retaining wall, a clay wall, and a stainless steel water retaining plate.

[0021] Compared with the prior art, the beneficial effects of this invention patent are:

[0022] This invention systematically divides the system into a multi-level ecological rainwater wetland system, utilizing the storage and retention of rainwater to create diverse site conditions, enriching the growth of different types of plant communities, thereby creating a diverse habitat for flora and fauna.

[0023] This invention, through an artistic approach, considers both the basic functions of rainwater wetlands and landscape creation, naturally combining plant communities to form beautiful waterscapes and wetland landscapes.

[0024] This invention, through multi-stage retention and filtration, purifies rainwater and pollutants in Dianchi Lake through plant absorption and microbial degradation, thereby reshaping the rainwater wetland landscape system along Dianchi Lake and restoring the ecological environment of Dianchi Lake. Attached Figure Description

[0025] Figure 1 A schematic diagram of a rainwater wetland system provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of a method for constructing a rainwater wetland system provided in an embodiment of the present invention.

[0027] Figure 3 A schematic diagram of the first ecological revetment system provided in the embodiments of the present invention;

[0028] Figure 4 A schematic diagram of a second type of ecological revetment system provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a third type of ecological revetment system provided in an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the sedimentation pond outlet channel provided in an embodiment of the present invention.

[0031] Figure 7 A schematic diagram of a cedar stake provided in an embodiment of the present invention.

[0032] Figure 8 This is a schematic diagram of the insertion of cedar stakes provided in an embodiment of the present invention.

[0033] Figure 9 A schematic diagram of the overflow weir provided in an embodiment of the present invention. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1 to 9 The present invention provides a technical solution:

[0036] Rainwater wetlands are artificial wetland systems that sediment, filter, purify, and regulate rainwater, while also serving ecological and landscape functions. Through the combined effects of physical processes, plants, and microorganisms, they achieve the goal of purifying rainwater. As a low-impact development facility, they are often used at the end of sponge city construction systems to store and purify large-scale runoff from cities, effectively reducing the risk of urban flooding. The Dianchi Lake shoreline and rainwater wetlands, as buffer zones between Kunming's urban rainwater, rivers flowing into Dianchi Lake, and the lake itself, help purify incoming water and store rainwater, thereby optimizing the Dianchi Lake ecosystem.

[0037] This invention patent presents a method for reshaping the rainwater wetland landscape system along Dianchi Lake. This method not only achieves the goals of rainwater regulation and ecological restoration, but also creates natural and diverse plant communities and rich ecosystem diversity. It can also serve as a city park and a science education center. This is of great significance to the sustainable development of cities.

[0038] In response to the existing problems of the Dianchi Lake revetment, this proposal provides a design method for reshaping the rainwater wetland landscape system along the Dianchi Lake shoreline; please refer to... Figure 1 The diagram shown is a schematic representation of a rainwater wetland system provided in an embodiment of the present invention. Figure 1 As can be seen, the construction of rainwater wetland systems and the creation of ecological revetment systems include the following steps;

[0039] (1) The seaweed water is pumped into the pretreatment system and transported to the inlet energy dissipation pool. It is mixed with the municipal water transported by the municipal water pipe and transported to the inlet water distribution ditch of the sedimentation pond. It is filtered by galvanized steel wire mesh and connected to the sedimentation pond. It is then transported to the rainwater purification system through the outlet water distribution ditch of the sedimentation pond.

[0040] (2) The water from the sedimentation pond outlet water distribution ditch is transported to the wet pond through the rainwater purification treatment system. The water is then separated by inserting cedar stakes at both ends of the sedimentation pond outlet water distribution ditch and by using the wetland treatment unit to treat the water in the wet pond.

[0041] (3) The water treated by the wetland treatment unit is transported to the filter tank through the connecting pipe via the filtration system, and the filter tank is separated from the buffer tank by cedar piles.

[0042] (4) Through the buffer system, the water treated by the filter pool is transported to the buffer pool through the connecting pipe, and connected to the Caohai Lake of Dianchi Lake through the overflow weir.

[0043] Specifically, the system constructed by this invention patent becomes a multi-level ecological rainwater wetland system, achieving functions such as rainwater retention and Dianchi Lake water circulation and purification. Through multi-level retention and filtration, rainwater and pollutants in Dianchi Lake are purified through plant absorption and microbial degradation, thereby reshaping the rainwater wetland landscape system along Dianchi Lake and restoring the ecological environment of Dianchi Lake.

[0044] The construction of the ecological revetment system includes three methods;

[0045] The first type of ecological revetment system consists of a protective forest belt, an ecological planting belt, and a rainwater system pond from top to bottom;

[0046] The second type of ecological revetment system consists of a revetment forest belt, a gravel breakwater, an ecological planting belt, a gentle slope leading into the water, a demolished hard retaining wall, an underwater buffer zone, and a water body, arranged from top to bottom.

[0047] The third type of ecological revetment system consists of a protective forest belt, an ecological planting belt along the pond embankment, a gentle slope leading into the water, and a rainwater system pond, arranged from top to bottom.

[0048] Please refer to Figure 2 The diagram shown is a schematic representation of the rainwater wetland system construction provided in an embodiment of the present invention; by Figure 2 As can be seen, the rainwater wetland system includes, from top to bottom, a pretreatment system, a rainwater purification system, and a filtration system;

[0049] The pretreatment system includes a grass-sea water lifting pump, which is connected to the inlet water distribution ditch of the sedimentation pond. The inlet water distribution ditch of the sedimentation pond is connected to the sedimentation pond, and a galvanized steel wire mesh is set between the inlet water distribution ditch of the sedimentation pond and the sedimentation pond. The sedimentation pond is connected to the outlet water ditch of the sedimentation pond.

[0050] The rainwater purification system includes a wet pond, which is connected to the outlet ditch of a sedimentation pond. Fir wood stakes are installed at both ends of the outlet ditch of the sedimentation pond to separate the sedimentation pond from the wet pond. The wet pond is connected to the wetland treatment unit through a connecting pipe, and the wet pond and the connecting pipe are equipped with fir wood stakes.

[0051] The filtration system includes a connecting pipe that connects the filtration tank to the wetland treatment unit. A buffer system is separated from the filtration system by fir wood piles. The buffer system includes a buffer tank connected to the filtration tank via the connecting pipe and connected to the Dianchi Caohai area via an overflow weir. A galvanized steel wire mesh is installed on the gentle slope of the inlet distribution ditch of the sedimentation pond; specifically, the height of the galvanized steel wire mesh should be greater than the normal water level of the sedimentation pond. The connecting pipe is installed between wetland treatment units, between wetland treatment units and the filtration tank, and between the filtration tank and the buffer tank. Specifically, the connecting pipe is a steel pipe with a diameter of 800mm, and gratings are installed on both sides of the pipe opening.

[0052] The following are several implementation methods for ecological revetment systems provided in this solution. Please refer to them. Figure 3 The diagram shown is a schematic diagram of the first type of ecological revetment system provided in an embodiment of the present invention; by Figure 3 As can be seen, the ecological revetment system is set up from top to bottom. The ecological revetment system first sets up a revetment forest belt, and then plants an ecological planting belt of pond embankment at the lower end of the revetment forest belt. At the lower end of the ecological planting belt, a rainwater system pond is set up.

[0053] This plan designs the original revetment with a gentle slope into the water at a ratio of 1:6. The forest belt can select trees such as *Celtis yunnanensis*, *Cinnamomum yunnanensis*, *Machilus yunnanensis*, and *Magnolia denudata*. Ground cover plants will consider the transition between the wetland and its surroundings, primarily using mixed sowing of wildflowers, such as *Zephyranthes candida*, *Zinnia galanga*, *Oxalis corniculata*, *Zephyranthes candida*, and *Verbena officinalis*, to form continuous patches of ground cover flowers or create a wild-looking flower border. The ecological planting zone will select plants such as *Carex*, *Onion*, *Acorus calamus*, *Typha orientalis*, *Phragmites australis*, *Umbrella grass*, *Lythrum salicaria*, and *Juncus effusus*. Low-growing plants will be planted in a mixed planting pattern to enhance the degradation effect of the rainwater system ponds. Taller plants will be planted in blocks of single species, taking into account the different root depths to reduce competition between plants. The rainwater system ponds will select floating and submerged plants such as *Potamogeton crispus*, *Vallisneria natans*, *Potamogeton malaianus*, *Hydrilla verticillata*, and *Alisma plantago-aquatica*.

[0054] Please refer to Figure 4 The diagram shown is a schematic representation of a second type of ecological revetment system provided in an embodiment of the present invention; by Figure 4 As can be seen, the ecological revetment system is set up from top to bottom. The ecological revetment system first sets up a revetment forest belt, then connects the lower end of the revetment forest belt to the rocky beach drawdown zone, and sets up an ecological planting zone at the lower end of the rocky beach drawdown zone. The stones removed from the original revetment stone wall are stacked and connected to the underwater buffer zone.

[0055] This plan involves constructing a 1000mm wide gravel breakwater, sowing grass seeds among the gravel to form an ecological planting zone, and mitigating soil erosion. The original terrain is reshaped, with a gentle slope designed to enter the water at a ratio of 1:4. The existing retaining wall and revetment are removed down to 100mm below the low water level, and the removed gravel is piled up to form an underwater buffer zone with a width of ≥2000mm. The ecological planting zone can be planted with erosion-resistant plants such as loosestrife, calamus, cattail, iris, and canna lily.

[0056] Please refer to Figure 5 The diagram shown is a schematic representation of the third type of ecological revetment system provided in an embodiment of the present invention; by Figure 5 As can be seen, the ecological revetment system is set up from top to bottom: the ecological revetment system first sets up a revetment forest belt, and then plants an ecological planting belt on the pond embankment at the lower end of the revetment forest belt, so that rainwater can be transported into the rainwater system pond through the gentle slope leading into the water.

[0057] This plan designs the original revetment with a gentle slope into the water at a ratio of 1:4. Plants for the ecological planting belt on the pond embankment can include water plantain, reed, water onion, and variegated reed.

[0058] Please refer to Figure 6 A schematic diagram of the sedimentation pond effluent channel in the pretreatment system; the sedimentation pond effluent channel includes, from bottom to top, a reinforced concrete foundation, two rows of closely spaced anti-corrosion treated fir piles, and two layers of anti-corrosion treated fir wood; specifically, each 120mm diameter fir pile is anti-corrosion treated and inserted into the concrete foundation, and fixed with bolts in two closely spaced rows with a spacing of 2000mm between the two rows and a height difference of 600mm, forming a channel; 1800mm long, 100mm diameter anti-corrosion treated fir wood is fixed in the channel with bolts, divided into upper and lower layers, arranged horizontally at a spacing of 1580mm.

[0059] Please refer to Figures 7 to 8 A schematic diagram of the fir wood piles in the rainwater purification and filtration system; the fir wood piles are densely packed with 120mm diameter and 3100mm high fir wood piles that have undergone anti-corrosion treatment, and the part inserted into the soil to a depth of 150mm is coated with asphalt.

[0060] Please refer to Figure 9A schematic diagram of the overflow weir in the buffer zone; the overflow weir includes, from bottom to top, a crushed stone cushion layer, a concrete cushion layer, a rubble retaining wall, a clay wall, and a stainless steel water-retaining plate; specifically, after the subgrade soil is compacted, a 200mm thick crushed stone cushion layer and a 100mm thick concrete cushion layer are laid in sequence, a 600mm thick rubble retaining wall is built, the outer clay wall is compacted in layers, and a 5mm thick stainless steel water-retaining plate is installed on the overflow weir.

[0061] On rainy days, rainwater can flow into the inlet energy dissipation pool through municipal stormwater pipes, then into the wetland through the sedimentation pond and water distribution ditch. Rainwater can also flow directly into the wetland. After retention and filtration, the water flows from the upper layer to the lower layer and is finally discharged into the Dianchi Lake system. When there is no rain and the water level is very low, the water can be pumped into the wetland pool through the Caohai water lifting pump station, thus forming a circulating water source, improving water quality, and maintaining the landscape effect.

[0062] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for reshaping the rainwater wetland landscape system along Dianchi Lake, characterized in that: The rainwater wetland landscape system along Dianchi Lake includes a rainwater wetland system and an ecological revetment system, with the rainwater wetland system supplying water to the ecological revetment system; The aforementioned rainwater wetland system includes a pretreatment system, a rainwater purification system, a filtration system, and a buffer system from upstream to downstream. The pretreatment system includes a grass-sea water lifting pump, which is connected to the sedimentation pond inlet water distribution ditch. The sedimentation pond inlet water distribution ditch is connected to the sedimentation pond, and a galvanized steel wire mesh is set between the sedimentation pond inlet water distribution ditch and the sedimentation pond. The sedimentation pond is connected to the sedimentation pond outlet water distribution ditch. The rainwater purification system includes a wet pond, which is connected to the effluent distribution ditch of the sedimentation pond. Fir wood piles are installed at both ends of the effluent distribution ditch to separate the sedimentation pond from the wet pond. The wet pond is connected to the wetland treatment unit through a connecting pipe. The filtration system includes a connecting pipe that connects the filtration tank to the wetland treatment unit, and a buffer system that is separated from the filtration system by cedar stakes. The buffer system includes a buffer pool, which is connected to a filter pool via a connecting pipe and to the Caohai Lake in Dianchi Lake via an overflow weir. The working principle of the rainwater wetland landscape system is as follows: The pretreatment system in the rainwater wetland system connects the seaweed water lift pump to the seaweed water, which is then transported to the inlet energy dissipation tank, mixed with municipal water transported by the municipal water pipe, and then transported to the sedimentation pond inlet water distribution ditch for filtration through galvanized steel wire mesh. It is then connected to the sedimentation pond and transported to the rainwater purification system through the sedimentation pond outlet water distribution ditch. The rainwater purification system transports the water from the sedimentation pond's outlet distribution ditch to the wet pond. Fir wood stakes are inserted at both ends of the sedimentation pond's outlet distribution ditch, and fir wood stakes are also inserted in the wet pond to separate the wet pond from the wetland treatment unit. The wetland treatment unit then treats the water in the wet pond. The water treated by the wetland treatment unit is transported to the filter tank through a connecting pipe via a filtration system, and the filter tank is separated from the buffer tank by cedar piles. The water treated by the filter pool is transported to the buffer pool through the connecting pipe through the buffer system, and then connected to the Caohai Lake of Dianchi Lake through the overflow weir, supplying water to the ecological revetment system along the way. The construction of the ecological revetment system includes the following three methods: The first type of ecological revetment system consists of a revetment forest belt, an ecological planting belt along the pond ridge, and a rainwater system pond from top to bottom; Alternatively, the second type of ecological revetment system consists of a revetment forest belt, a gravel breakwater, an ecological planting belt along the pond embankment, a gentle slope leading into the water, a demolished hard retaining wall, an underwater buffer zone, and a water body, arranged from top to bottom. Alternatively, the third type of ecological revetment system consists of a protective forest belt, an ecological planting belt along the pond embankment, a gentle slope leading into the water, and a rainwater system pond, arranged from top to bottom.

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