Ecological garden water circulation system and method thereof

Abstract

The invention discloses an ecological garden water circulation system and method, and the system comprises a rainwater collection system which is used for collecting rainwater in a garden; the rainwater collection system comprises a sponge facility, and the sponge facility comprises at least one of a rainwater garden, an ecological dry stream, a permeable pavement and an ecological grass planting ditch; the integrated storage-purification-water supply integrated system is used for storing, purifying and supplying the collected rainwater; the integrated storage-purification-water supply integration system is connected with the rainwater collection system; the integrated storage-purification-water supply integrated system comprises a water storage system, a purification system, a water supply system and an irrigation system. According to the ecological garden water circulation system and the method thereof, through a reasonable construction and operation method, rainwater can be effectively collected, stored and purified, cyclic utilization of garden water resources is achieved, and ecological benefits and economic benefits of gardens are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of garden construction, and particularly relates to an ecological garden water circulation system and a method thereof. Background Art

[0002] Gardens play a crucial role in modern society. They can not only meet the needs of urban greening environments, create a clean, beautiful and civilized ecological environment for people, but also provide outdoor leisure places, achieving the synchronous development and virtuous cycle of ecological, social and economic benefits. As an advanced form of garden construction, ecological gardens emphasize the balance and sustainable development of ecological systems, and the construction of a water circulation system plays a key role in maintaining the stability and health of the garden ecosystem.

[0003] With the continuous expansion of the scale and the increasing diversification of functions of ecological gardens, their demand for water resources is also increasing day by day. Plant irrigation, landscape water body maintenance, etc. in gardens all require a large amount of water resource support. However, traditional garden water use mainly relies on the urban water supply system, which not only increases the pressure on urban water supply but also raises the operation cost of gardens.

[0004] Therefore, how to effectively collect, store and utilize rainwater to achieve the recycling of garden water resources has become an urgent problem to be solved in ecological garden construction.

[0005] Problems existing in the existing garden water circulation systems are as follows: 1. Single collection method: Traditional garden rainwater collection methods are often relatively simple, mainly relying on the natural collection of surface runoff, lacking systematic and targeted designs. 2. Imperfect facilities: The layout planning is not reasonable enough, without fully considering the terrain, vegetation distribution and functional zoning of the garden, resulting in low efficiency of collecting rainwater. 3. Poor filtering effect: A large amount of debris and pollutants will be carried during the collection of rainwater, such as leaves, branches, plastic garbage, suspended particles, heavy metals, organic substances and polycyclic aromatic hydrocarbons, etc. Existing rainwater collection systems usually lack effective filtering devices and cannot conduct preliminary purification treatment on rainwater, resulting in these debris and pollutants entering the subsequent storage and utilization links, increasing the difficulty and cost of subsequent treatment.

[0006] In view of the above problems existing in the existing garden water circulation systems, the present invention proposes an ecological garden water circulation system and a method thereof. The system realizes the efficient collection, storage, purification and recycling of rainwater by constructing a rainwater collection system and an integrated storage-purification-supply and return water integrated system. Summary of the Invention

[0007] Objective of the Invention: To overcome the above deficiencies, the objective of the present invention is to provide an ecological garden water circulation system and its method, which is reasonably designed. By constructing a rainwater collection system and an integrated storage-purification-supply and return water integrated system, efficient collection, storage, purification and recycling of rainwater are realized, the recycling of garden water resources is achieved, and the ecological and economic benefits of the garden are improved.

[0008] The objective of the present invention is achieved by the following technical solutions: An ecological garden water circulation system, comprising: A rainwater collection system for collecting rainwater in the garden; the rainwater collection system includes sponge facilities, and the sponge facilities include at least one of a rain garden, an ecological dry stream, a permeable pavement and an ecological grassed swale; An integrated storage-purification-supply water integrated system for storing, purifying and supplying the collected rainwater; the integrated storage-purification-supply water integrated system is connected to the rainwater collection system; the integrated storage-purification-supply water integrated system includes a water storage system, a purification system, a water supply system and an irrigation system.

[0009] Further, for the above ecological garden water circulation system, the rain garden is set in an area with a low terrain in the garden and a catchment area around; the rain garden includes a water storage layer, a planting soil layer and a gravel layer from top to bottom; the thickness of the water storage layer is 200~300mm, and the infiltration rate is controlled at 0.5~1.0 m³ / (m²·h); the planting soil layer uses sandy loam, with a thickness of 300~500 mm and a permeability coefficient ≥ 1×10⁻ 5 m / s, and is planted with water-tolerant herbaceous plants and / or flowers and / or shrubs; the thickness of the gravel layer is 100~200 mm.

[0010] According to the terrain, vegetation distribution and functional zoning of the garden, rain gardens are set in areas with a low terrain and a certain catchment area around. For example, around garden buildings, near parking lots or on both sides of roads to collect the rainwater runoff in these areas. The thickness of the water storage layer is designed to be 200~300mm to ensure there is enough space to store rainwater, and its infiltration rate is controlled at 0.5 1.0 m³ / (m²·h), which can not only ensure the rapid infiltration of rainwater but also avoid the breeding of mosquitoes due to too long water accumulation time. The thickness of the planting soil layer is designed to be 300~500 mm, using sandy loam, with a permeability coefficient ≥ 1×10⁻ 5 m / s, which is beneficial to the infiltration of rainwater and the growth of plant roots. Water-tolerant herbaceous plants, flowers and shrubs such as calamus, canna, amorpha fruticosa, etc. can be planted in the planting soil layer. These plants can not only absorb rainwater and nutrients but also play a role in beautifying the environment. The thickness of the gravel layer is designed to be 100~200 mm, which plays a role in drainage and filtration to prevent soil particles from blocking the drainage pipes.

[0011] Furthermore, in the above ecological garden water circulation system, the ecological dry stream is arranged along the natural slope or drainage direction of the garden; the bottom of the ecological dry stream is paved with cobblestones and / or gravels, and the slope is controlled between 0.5% and 2%; plants tolerant to waterlogging are planted on the banks of the ecological dry stream, and gentle slopes and steps are provided.

[0012] The ecological dry stream is arranged along the natural slope or drainage direction of the garden and can be interconnected to form a coherent drainage system. The ecological dry stream can be designed in a meandering shape to increase the interest and beauty of the landscape. The bottom of the ecological dry stream is paved with cobblestones and gravels, with a rough surface, which is beneficial to slowing down the water flow speed and increasing the infiltration time of rainwater. The slope of the bottom of the dry stream is controlled between 0.5% and 2% to ensure the smooth flow of rainwater. Plants tolerant to waterlogging, such as reeds and cattails, are planted on the banks of the ecological dry stream, which play a role in soil and slope protection and water purification. At the same time, some gentle slopes and steps are provided on the banks to facilitate people's access to nature.

[0013] Furthermore, in the above ecological garden water circulation system, the permeable pavement is arranged in the ground areas where garden personnel are frequently active and load-bearing capacity is required; the porosity of the permeable pavement is 20% - 30%, and the infiltration rate ≥ 1×10⁻ 4 cm / s, and the materials used include but are not limited to permeable bricks, permeable concrete, and permeable asphalt.

[0014] The permeable pavement is arranged on the ground where garden personnel are relatively frequently active and a certain load-bearing capacity is required, including but not limited to sidewalks, squares, parking lots, bicycle lanes, leisure trails, small activity venues, etc. The porosity of the permeable pavement is designed to be 20% - 30%, and the infiltration rate ≥ 1×10⁻ 4 cm / s to ensure that rainwater can quickly penetrate into the ground and reduce surface runoff. Common permeable pavement materials include permeable bricks, permeable concrete, permeable asphalt, etc. According to different use functions and load requirements, appropriate types of permeable pavement are selected.

[0015] Furthermore, in the above ecological garden water circulation system, the ecological grassed swale is arranged on both sides of garden roads, around buildings, or between rain gardens; the bottom of the ecological grassed swale is made of soil and / or paved with gravels, and herbaceous plants are planted; the walls of the ecological grassed swale are designed with gentle slopes, and the slope is controlled between 1:3 and 1:5, and herbaceous plants are planted on the walls.

[0016] Ecological grass swales are set on both sides of the garden paths, around the buildings or between the rain gardens as the collection and transmission channels for rainwater. The length and width of the ecological grass swales are designed according to the catchment area and flow rate. The bottom of the ecological grass swale is made of soil, paved with gravel, and planted with herbaceous plants, including but not limited to bermudagrass, ryegrass, buffalograss, zoysiagrass, tall fescue, etc., which play a role in filtering and purifying rainwater. The slope of the ecological grass swale is designed with a gentle slope, and the slope is controlled between 1:3 and 1:5 to prevent the collapse of the ditch wall. Some herbaceous plants can also be planted on the ditch wall to enhance the landscape effect.

[0017] Furthermore, in the above-mentioned ecological garden water circulation system, rainwater collection ports are set at the low-lying areas of the sponge facilities, and each rainwater collection port is connected by pipelines to form a rainwater collection network, and the rainwater collection network is connected to the water storage system; a grille or filter screen is set at the rainwater collection port.

[0018] Ecological grass swales are set on both sides of the garden paths, around the buildings or between the rain gardens as the collection and transmission channels for rainwater. The length and width of the ecological grass swales are designed according to the catchment area and flow rate. The bottom of the ecological grass swale is made of soil, paved with gravel, and planted with herbaceous plants, including but not limited to bermudagrass, ryegrass, buffalograss, zoysiagrass, tall fescue, etc., which play a role in filtering and purifying rainwater. The slope of the ecological grass swale is designed with a gentle slope, and the slope is controlled between 1:3 and 1:5 to prevent the collapse of the ditch wall. Some herbaceous plants can also be planted on the ditch wall to enhance the landscape effect.

[0019] The water storage system is connected to the rain garden, ecological dry stream, permeable pavement and ecological grass swale through the rainwater collection ports. Rainwater collection ports are set at the low-lying areas of the rain garden, ecological dry stream, permeable pavement and ecological grass swale. These rainwater collection ports are initially filtered by a grille or filter screen to prevent larger debris from entering the pipeline. The pipeline is made of materials such as PVC or HDPE, and each rainwater collection port is connected to form a complete rainwater collection network.

[0020] Furthermore, inspection wells are set at the turning points, intersections and diameter changes of the pipeline to facilitate the inspection and maintenance of the pipeline.

[0021] Furthermore, for the above ecological garden water circulation system, the water storage system includes a main reservoir and several PP module water storage tanks; the main reservoir is set at a low-lying place in the garden and close to the water use area, and the PP module water storage tanks are set under the permeable pavement and the collected rainwater is gathered into the main reservoir through pipeline connection; a grille or filter screen is arranged at the water inlet of the main reservoir; the purification system includes a sand filter layer and an artificial wetland, the sand filter layer is arranged near the water inlet in the main reservoir, the artificial wetland is arranged around or inside the main reservoir and aquatic plants are planted, and microbial agents are regularly put into the main reservoir; the water supply system includes a water pump and a water supply pipeline, and the water pump pumps the water that has been purified and treated out of the main reservoir and transports it to the irrigation system through the water supply pipeline.

[0022] The main reservoir is set at a low-lying place in the garden and close to the water use area, such as the end lawn area (a lawn area at a relatively marginal position and low-lying in the garden, which is the downstream position of the garden drainage and is suitable for building the main reservoir to better collect and utilize rainwater). The scale of the main reservoir is determined according to the area of the garden, rainfall and water use requirements. Under the permeable pavement, multiple PP module water storage tanks can be set to disperse and collect the infiltrated rainwater. These PP module water storage tanks are connected by pipelines to gather the rainwater into the main reservoir. The PP module water storage tanks have the advantages of convenient installation, small occupied space and strong water storage capacity. At the same time, their modular design is convenient for combination and expansion according to actual needs.

[0023] Before the rainwater enters the main reservoir, larger sundries such as leaves, branches, plastic garbage, etc. are intercepted by a grille or filter screen first. The gap size of the grille or filter screen can be selected according to the actual situation. A sand filter layer is arranged at the water inlet in the main reservoir, and the rainwater entering the main reservoir first passes through the sand filter layer. The sand filter layer is composed of sand and gravel layers with different particle sizes, and the particle size gradually decreases from bottom to top. When the rainwater passes through the sand filter layer, finer suspended solids and impurities can be further removed. The thickness of the sand filter layer is designed to be 500 - 800 millimeters.

[0024] At the same time, the aquatic plants and microbial agent packages in the artificial wetland biologically purify the rainwater in the main reservoir, decomposing and transforming the organic matter in the rainwater. When the garden needs irrigation, the water pump starts, and the water that has been purified and treated is transported to the irrigation system through the water supply pipeline (lay the water supply pipeline to connect the main reservoir with each water use area in the garden. The water supply pipeline should be made of corrosion-resistant and pressure-resistant materials such as PE pipes, PVC pipes, etc. Control and measurement devices such as valves and water meters are arranged on the water supply pipeline to facilitate management and maintenance), for irrigating the flowers, shrubs and other plants as well as the lawns and green spaces in the garden.

[0025] Furthermore, for the above ecological garden water circulation system, the main reservoir adopts a reinforced concrete structure; the pool wall and the bottom of the main reservoir are subjected to anti-seepage treatment, and an openable cover plate is provided on the top of the main reservoir; a water level sensor is installed in the main reservoir for real-time monitoring of the water level in the main reservoir; the area of the artificial wetland accounts for 10% - 20% of the area of the main reservoir.

[0026] The main reservoir adopts a reinforced concrete structure to ensure its firmness and durability. Its pool wall and bottom are subjected to anti-seepage treatment to prevent rainwater leakage. An openable cover plate is provided on the top of the pool for easy maintenance and cleaning.

[0027] The water level sensor is installed in the main reservoir to monitor the water level in the main reservoir in real time. When the water level reaches the upper limit, the water level sensor transmits a signal to the control system, and the control system controls the opening of the overflow port in the main reservoir to drain the excess rainwater to a safe area, such as a nearby drainage ditch or a low-lying area, to prevent the main reservoir from overflowing. When the water level is lower than the lower limit, the water level sensor also transmits a signal to the control system, and the control system triggers an automatic alarm device to remind the garden management personnel to take measures in time, such as replenishing water sources, through sound and light.

[0028] Planting soil is laid on the artificial wetland, and aquatic plants are planted, such as reeds, calamus, cannas, etc. The planting density and layout of aquatic plants need to be designed according to the growth characteristics of the plants and the functional requirements of the wetland.

[0029] The irrigation system includes a drip irrigation system and a sprinkler irrigation system. The drip irrigation system slowly drips water into the roots of plants through drip heads, which is suitable for plants such as garden flowers and shrubs. The pipes of the drip irrigation system are laid on the ground or underground near the roots of plants, and drip heads are installed at intervals on the pipes. During installation, the pipes of the drip irrigation system are connected to the water supply pipes to ensure that water can be smoothly delivered to the drip heads. The sprinkler irrigation system evenly sprays water in the irrigation area through sprinkler heads, which is suitable for large areas of lawns and green spaces in the garden. The pipes of the sprinkler irrigation system are laid on the ground or underground, and sprinkler heads are installed at the ends of the pipes. During installation, the pipes of the sprinkler irrigation system are connected to the water supply pipes, and the angles and ranges of the sprinkler heads are adjusted to ensure that water can evenly cover the irrigation area.

[0030] The present invention also relates to a construction method of the above ecological garden water circulation system, including the following steps: (1) Planning and design: Conduct investigations and analyses on the topography, landform, vegetation distribution, and water use requirements of the ecological garden. According to the actual situation, formulate a planning and design scheme for the water circulation system, and determine the layout and scale of the rainwater collection system and the integrated storage-purification-water supply integrated system, including the locations and parameters of the rain garden, ecological dry stream, permeable pavement, ecological grassed swale, water storage system, purification system, water supply system, and irrigation system; (2) Site preparation: According to the planning and design plan, level and transform the site of the ecological garden, clean up sundries and obstacles, excavate the foundation pits for the rainwater collection system and the integrated storage-purification-water supply integrated system, and lay the anti-seepage layer and pipelines; (3) Construction of the rainwater collection system: Construct sponge facilities (such as rain gardens, ecological dry streams, permeable pavements, and ecological grass ditches), and carry out construction according to the design requirements to ensure that the structure and performance of the sponge facilities meet the standards; Set the rainwater collection inlets at the low-lying areas of the rain gardens, ecological dry streams, permeable pavements, and ecological grass ditches, and conduct preliminary filtration using gratings or filters; Connect the pipelines to each rainwater collection inlet and set inspection wells to facilitate the inspection and maintenance of the pipelines; (4) Construction of the integrated storage-purification-water supply integrated system: Construct a water storage system, a purification system, a water supply system, and an irrigation system, and carry out construction according to the design requirements to ensure that the structure and performance of the water storage system, purification system, water supply system, and irrigation system meet the standards; Construct a main reservoir, select a place with a low terrain in the garden and close to the water use area. The main reservoir is made of reinforced concrete structure. Conduct anti-seepage treatment on the pool wall and bottom of the main reservoir, and set an openable cover on the pool top. Install a water level sensor and an overflow pipe in the main reservoir to ensure the safe operation of the reservoir; Install a PP module water storage tank, set it under the permeable pavement, and collect rainwater into the main reservoir through pipeline connection; Install a grating or filter; Install a sand filter layer; Install a water pump and a pipeline system, select the water pump according to the height, distance, and water consumption of the water use area, lay the water supply pipeline with corrosion-resistant and pressure-resistant materials, and set valves, water meter control, and metering devices; Install an irrigation system, including a drip irrigation system and a sprinkler irrigation system; (5) Commissioning and acceptance: After the construction of the water circulation system is completed, conduct system commissioning; Check the operation of each component to ensure normal functions; Detect the water quality, water volume, and water pressure parameters of the water circulation system, and conduct acceptance after meeting the design requirements.

[0031] The present invention also relates to an operation method of the water circulation system of the ecological garden, including the following steps: (1) Rainwater collection stage: During the rainfall process, sponge facilities (such as rain gardens, ecological dry streams, permeable pavements, and ecological grass ditches) collect the rainwater in the garden and then transport it to the water storage system; (2) Rainwater storage and purification stage: After the rainwater enters the water storage system, it is first physically filtered through the grating or filter and the sand filter layer of the purification system, and then biologically purified through the constructed wetland and microbial inoculant of the purification system; (3) Water supply stage: When the garden needs irrigation, the control system starts the water pump of the water supply system. The water pump pumps water out of the water storage system and transports it to the irrigation system through the water supply pipeline of the water supply system. When the irrigation is over, the control system shuts down the water pump and stops the water supply. The drip irrigation system slowly drips water into the roots of plants such as flowers and shrubs, and the sprinkler irrigation system evenly sprays water on large areas of lawns and greenlands. (4) Monitoring and maintenance stage: Regularly monitor the water circulation system, including the detection of water quality, water volume, water level, and equipment operation status parameters. Timely discover and handle problems that occur in the water circulation system. Maintain and service the sponge facilities, water storage system, purification system, water supply system, and irrigation system to ensure the normal operation of the water circulation system. Adjust and optimize the water circulation system according to the actual situation.

[0032] Compared with the prior art, the present invention has the following beneficial effects: The ecological garden water circulation system and its method disclosed by the present invention are reasonably designed. By collecting and utilizing rainwater, it reduces the dependence on the urban water supply system, reduces the operation cost of the garden, and at the same time improves the utilization efficiency of water resources. The water circulation system can effectively purify rainwater, remove impurities and pollutants therein, reduce the pollution of the garden soil and water bodies, and improve the ecological environment of the garden. Through reasonable layout and design, the sponge facilities and landscape water bodies in the water circulation system can become part of the garden landscape, enhancing the landscape effect and ornamental value of the garden. The water circulation system and its method conform to the concept of sustainable development and can provide strong support for the long-term development of the garden. Specific embodiments

[0033] Next, Example 1 and Comparative Example 1 will be combined with specific experimental data to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. Example 1 Select an ecological garden A with an area of 100,000 square meters as the implementation site for Example 1. The ecological garden A contains various vegetation types, such as flowers, shrubs, large areas of lawns and greenlands, etc. The average annual rainfall in the area where it is located is 800 millimeters, and the rainfall is concentrated from May to September.

[0034] The construction of Example 1 is as follows: (1) Rainwater collection system 1. Sponge facilities Rainwater Garden: Rainwater gardens are set at low-lying areas around buildings in Ecological Garden A, near parking lots, and on both sides of roads. The thickness of the water storage layer is 250 mm, the infiltration rate is 0.8 m³ / (m²·h), the planting soil layer uses sandy loam with a permeability coefficient of 1.5×10⁻ 5 m / s. Cattail, canna, and Amorpha fruticosa are planted, and the thickness of the gravel layer is 150 mm.

[0035] Ecological Dry Stream: It is set along the natural slope of Ecological Garden A, winding in shape. The bottom of the stream is paved with cobblestones, the slope is 1%, and reeds and cattails are planted on the stream banks. Gentle slopes and steps are set.

[0036] Permeable Pavement: Permeable bricks are used on the sidewalks, squares, and parking lots in Ecological Garden A. The porosity is 25%, and the infiltration rate is 1.2×10⁻ 4 cm / s.

[0037] Ecological Grass Swale: It is set between the roads on both sides of Ecological Garden A and the rainwater garden. Gravel is paved at the bottom of the swale, and bermudagrass and perennial ryegrass are planted. The slope of the swale wall is 1:4.

[0038] Rainwater Collection Inlet: It is set at the low-lying areas of each sponge facility, and is initially filtered by a grille. The size and quantity are designed according to the catchment area and flow rate.

[0039] Pipes: Made of PVC material, the pipe diameter and slope are determined according to calculations to ensure the smooth conveyance of rainwater.

[0040] Inspection Well: It is set at the pipe bends, intersections, and diameter changes, and the well wall is made of bricks.

[0041] (2) Integrated Storage-Purification-Supply and Return Water Integration System Main Reservoir: Built in the end lawn area of Ecological Garden A, with a volume of 800 cubic meters, made of reinforced concrete structure, the pool wall and bottom are treated with anti-seepage, an openable cover is set on the pool top, and a water level sensor is also installed. When the water level reaches the upper limit, it drains through the overflow pipe, and when it reaches the lower limit, it automatically alarms.

[0042] PP Module Water Storage Tank: Multiple are set under the permeable pavement and are connected to the main reservoir through pipes.

[0043] Physical Filtration: A grille is set at the inlet of the main reservoir, with a grille gap of 15 mm to intercept larger debris. The thickness of the sand filter layer is 600 mm to further filter impurities.

[0044] Biological Purification: An artificial wetland is set around the main reservoir, with an area accounting for 15% of the main reservoir area. Reed, cattail, and canna are planted, and microbial inoculants are regularly put in to promote the decomposition of organic matter.

[0045] Water supply system: A centrifugal pump is selected. The flow rate and head are determined according to the height, distance, and water consumption of the water-using area. The water supply pipeline uses PE pipes, and valves and water meters are installed.

[0046] Irrigation system: Drip irrigation systems are used for flowers and shrubs. The flow rate and spacing of the drippers are adjusted according to the water requirements of the plants. Sprinkler irrigation systems are used for large areas of lawns and green spaces, and sprinkler heads are selected according to the shape and area of the irrigation area.

[0047] The operation of Example 1 is as follows: (1) Daily monitoring Water quality monitoring: The water quality of the main reservoir is detected weekly. The detection indicators include pH value, COD, BOD, and SS, etc. The average pH value in the first three months is 7.2, COD is 30 mg / L, BOD is 15 mg / L, and SS is 20 mg / L, all of which meet the requirements for garden water use.

[0048] Water level monitoring: The water level is monitored in real time to ensure it is within the safe range. During a rainfall process with a rainfall of 50 mm, the water level rises to the upper limit and drains smoothly through the overflow pipe.

[0049] (2) Maintenance and repair Equipment maintenance: Equipment such as pumps, valves, and water meters are inspected monthly to ensure normal operation. No faults occurred in the equipment within half a year of operation.

[0050] Debris cleaning: Debris in the grille, sand filter, and constructed wetland is cleaned quarterly, and the reservoir is dredged once a year.

[0051] (3) Emergency treatment Response to heavy rain: The drainage facilities are inspected before heavy rain to ensure smooth drainage. During a heavy rain process, the system drained normally without waterlogging.

[0052] Equipment failure handling: An emergency plan is formulated. When equipment fails, it can be repaired within 24 hours.

[0053] Comparative Example 1 An ecological garden B with an area similar to that of Example 1 is selected, but the water circulation system of the present invention is not adopted, and only traditional tap water irrigation is relied on.

[0054] The operation of Comparative Example 1 is as follows: Water resource consumption: The average monthly water consumption is 500 cubic meters, which is much higher than the average of 150 cubic meters per month in Example 1 (after rainwater collection and utilization).

[0055] Water quality situation: Due to the use of tap water, the mineral content in the water is relatively high, and long-term irrigation has caused partial soil compaction, which has affected the growth of plants to a certain extent.

[0056] Cost analysis: The annual water fee expenditure is about 30,000 yuan, while in Example 1, due to rainwater collection and utilization, the water fee expenditure is only 0.5 ten thousand yuan.

[0057] In summary, through the comparison between Example 1 and Comparative Example 1 above, it can be seen that the ecological garden water circulation system and its method of the present invention have significant advantages in aspects such as water resource utilization, water quality guarantee, and cost control, and can achieve the sustainable development of ecological gardens.

[0058] There are many specific application ways of the present invention, and the above is only the preferred implementation manner of the present invention. It should be noted that the above examples are only used to illustrate the present invention and do not limit the protection scope of the present invention. For those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements can still be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. An ecological garden water circulation system, characterized in that: include: A rainwater collection system for collecting rainwater in the garden; the rainwater collection system includes a sponge facility, and the sponge facility includes at least one of a rainwater garden, an ecological dry creek, a permeable pavement, and an ecological grass-planted ditch; The integrated water storage-purification-supply system is used to store, purify and supply collected rainwater; the integrated water storage-purification-supply system is connected to the rainwater collection system; the integrated water storage-purification-supply system includes a water storage system, a purification system, a water supply system and an irrigation system.

2. The ecological garden water circulation system according to claim 1 is characterized in that: The rain garden is set in an area with low terrain and surrounding water collection area; the rain garden includes an aquifer, a planting soil layer and a gravel layer from top to bottom; the aquifer is 200-300 mm thick, and the infiltration rate is controlled at 0.5-1.0 m³ / (m²·h); the planting soil layer is made of sandy loam, with a thickness of 300-500 mm and a permeability coefficient of ≥1×10⁻ 5 m / s, and water-resistant herbs and / or flowers and / or shrubs are planted; the thickness of the gravel layer is 100-200 mm.

3. The ecological garden water circulation system according to claim 1 is characterized in that: The ecological dry creek is arranged along the natural slope or drainage direction of the garden; the bottom of the ecological dry creek is paved with pebbles and / or gravel, and the slope is controlled between 0.5% and 2%; the banks of the ecological dry creek are planted with water-resistant plants, and are provided with gentle slopes and steps.

4. The ecological garden water circulation system according to claim 1 is characterized in that: The permeable pavement is set in the ground area where the gardeners are active and need to have bearing capacity; the porosity of the permeable pavement is 20%~30%, and the penetration rate is ≥1×10⁻ 4 cm / s, and the materials used include but are not limited to permeable bricks, permeable concrete, and permeable asphalt.

5. The ecological garden water circulation system according to claim 1 is characterized in that: The ecological grass-planting ditch is arranged on both sides of the garden road, around the building or between the rain gardens; the bottom of the ecological grass-planting ditch is made of soil and / or paved with gravel, and herbaceous plants are planted; the wall of the ecological grass-planting ditch adopts a gentle slope design, the slope is controlled between 1:3 and 1:5, and herbaceous plants are planted on the wall.

6. The ecological garden water circulation system according to claim 1 is characterized in that: A rainwater collection port is provided in a low-lying area of ​​the sponge facility, and each rainwater collection port is connected by a pipe to form a rainwater collection network, and the rainwater collection network is connected to a water storage system; a grille or filter is provided at the rainwater collection port.

7. The ecological garden water circulation system according to claim 1 is characterized in that: The water storage system includes a main water reservoir and several PP module water tanks; the main water reservoir is arranged in a low-lying part of the garden close to the water use area, the PP module water tank is arranged under the permeable pavement, and the collected rainwater is collected into the main water reservoir through a pipe connection; a grid or filter is arranged at the water inlet of the main water reservoir; the purification system includes a sand filter layer and an artificial wetland, the sand filter layer is arranged in the main water reservoir near the water inlet, the artificial wetland is arranged around or inside the main water reservoir and is planted with aquatic plants, and microbial agents are regularly added to the main water reservoir; the water supply system includes a water pump and a water supply pipe, the water pump draws purified water from the main water reservoir and transports it to the irrigation system through the water supply pipe.

8. The ecological garden water circulation system according to claim 7 is characterized in that: The main water reservoir adopts a reinforced concrete structure; the wall and bottom of the main water reservoir are anti-seepage treated, and the top of the main water reservoir is provided with an openable cover; a water level sensor is installed in the main water reservoir for real-time monitoring of the water level in the main water reservoir; the area of ​​the artificial wetland accounts for 10% to 20% of the area of ​​the main water reservoir.

9. The method of the ecological garden water circulation system according to any one of claims 1 to 8, characterized in that: The construction of the ecological garden water circulation system includes the following steps: ()1 Planning and design: Investigate and analyze the topography, landform, vegetation distribution and water demand of the ecological garden, formulate a planning and design plan for the water circulation system according to the actual situation, and determine the layout and scale of the rainwater collection system and the integrated storage-purification-supply system, including the location and parameters of the rainwater garden, ecological dry creek, permeable pavement, ecological grass-planted ditch, water storage system, purification system, water supply system and irrigation system; (2) Site preparation: According to the planning and design plan, the site of the ecological garden shall be leveled and renovated, debris and obstacles shall be cleared, foundation pits for the rainwater collection system and the integrated water storage-purification-supply system shall be dug, and anti-seepage layers and pipelines shall be laid; (3) Construction of rainwater collection system: construct sponge facilities and carry out construction according to design requirements to ensure that the structure and performance of the sponge facilities meet the standards; (4) Construction of an integrated water storage-purification-supply system: Construction of water storage system, purification system, water supply system and irrigation system, and construction in accordance with design requirements to ensure that the structure and performance of the water storage system, purification system, water supply system and irrigation system meet the standards; (5) Debugging and acceptance: After the water circulation system is built, debug the system and check the operation of each component to ensure normal function; The water quality, water quantity and water pressure parameters of the water circulation system are tested and acceptance is carried out after they meet the design requirements.

10. The method of the ecological garden water circulation system according to any one of claims 1 to 8, characterized in that: The operation of the ecological garden water circulation system includes the following steps: (1) Rainwater collection stage: During rainfall, the sponge facilities collect rainwater in the garden and then transport it to the water storage system; (2) Rainwater storage and purification stage: After entering the water storage system, rainwater is first physically filtered through the grille or filter and sand filter layer of the purification system, and then biologically purified through the artificial wetland and microbial agents of the purification system; (3) Water supply stage: When the garden needs irrigation, the control system starts the water pump of the water supply system. The water pump draws water from the water storage system and transports it to the irrigation system through the water supply pipe of the water supply system. When the irrigation is completed, the control system turns off the water pump and stops the water supply. (4) Monitoring and maintenance phase: Regularly monitor the water circulation system, including testing of water quality, water quantity, water level, and equipment operating status parameters; promptly identify and handle problems arising in the water circulation system; maintain and service sponge facilities, water storage systems, purification systems, water supply systems, and irrigation systems to ensure the normal operation of the water circulation system; and adjust and optimize the water circulation system based on actual conditions.