A method for creating and optimizing drainage of a sponge-type urban landscape site integration

Abstract

The application provides a sponge-type urban landscape site integrated construction and drainage optimization method, which comprises the following steps: constructing a three-stage diversion path; laying a plurality of layers of substrates in the site from top to bottom, laying a perforated water collecting pipe at the bottom layer of the substrates, and then planting landscape plant communities on the surface layer of the substrates according to the terrain height difference. The sponge-type urban landscape site integrated construction and drainage optimization method provided by the application can collect real-time meteorological monitoring data and meteorological forecast data, realize early judgment of rainfall intensity, switch the drainage path according to different rainfall intensities, form a hierarchical regulation of open water storage and reuse in light rain, underground closed water storage and consumption reduction in moderate rain, and overflow regulation in heavy rain, prevent the problems of resource waste in light rain and easy waterlogging in heavy rain, and further improve the rainwater storage, water quality purification and runoff diversion capacity of the sponge landscape site by means of gradient structure setting and the water retention, adsorption interception and water and soil conservation of the plant communities.

Description

Technical Field

[0001] This application relates to the field of sponge city governance technology, and in particular to a method for integrated creation and drainage optimization of sponge city landscape sites. Background Technology

[0002] Sponge city landscape sites are new types of urban green spaces created based on the low-impact development concept of sponge cities. They use landscape green spaces, dry streams, landscape ponds, and walkways as carriers, integrating ecological landscape creation and natural rainwater storage functions. Through site topography optimization, matrix structure layout, vegetation configuration, and coordinated storage and drainage facilities, they can achieve rainwater absorption, infiltration, purification, storage, and slow release, taking into account urban landscape beautification, stormwater management, and rainwater resource utilization. They are the core carriers for urban ecological water management, alleviating urban flooding, and restoring the urban hydrological cycle.

[0003] Existing urban landscape site drainage primarily relies on the natural infiltration of rainwater through the pores of the topsoil. Excess rainwater that cannot infiltrate flows into storm drains via the site's slope, achieving passive drainage. However, during periods of continuous rainfall, the infiltration rate of rainwater into the soil is lower than the surface runoff rate. The soil pores are quickly filled with water and reach saturation, significantly reducing the site's original rainwater retention, regulation, and infiltration capacity. Furthermore, during peak rainfall periods, the instantaneous runoff volume surges, causing large areas of surface runoff to converge at drainage outlets, leading to water accumulation, runoff congestion, and drainage obstruction. Consequently, the drainage function of sponge landscape sites is limited. Summary of the Invention

[0004] This application aims to at least partially solve one of the technical problems in the aforementioned technologies.

[0005] Therefore, one objective of this application is to propose an integrated method for creating and optimizing drainage in sponge-type urban landscape sites. This method can predict rainfall intensity in advance and switch drainage paths according to different rainfall intensities, forming a hierarchical regulation system for open water storage and reuse during light rain, closed underground water storage and energy saving during medium rain, and regulation and overflow during heavy rain. This prevents resource waste during light rain and waterlogging during heavy rain.

[0006] To achieve the above objectives, the first aspect of this application proposes a method for integrated creation and drainage optimization of sponge city landscape sites, comprising the following steps:

[0007] Step 1. Construct a three-level traffic routing path

[0008] Multiple layers of substrate are laid from top to bottom on the site. Perforated water collection pipes are laid at the bottom layer of the substrate. Then, landscape plant communities are planted on the surface substrate according to the terrain elevation difference.

[0009] Step 2. Construct a water storage unit

[0010] An open landscape water storage unit and an underground prefabricated water storage unit are set up. The open landscape water storage unit and the underground prefabricated water storage unit are connected through a control valve. Liquid level sensors and water quality sensors are installed in the open landscape water storage unit and the underground prefabricated water storage unit. Then, the open landscape water storage unit is connected to the perforated water collection pipe through a control valve.

[0011] Step 3. Real-time data acquisition and transmission

[0012] Establish a stable data transmission network to transmit the current weather information and weather forecast information collected by the sensors to the data center to determine the intensity of future rainfall;

[0013] Step 4. Develop optimization strategies

[0014] Based on the judgment, the on / off state of the control valve is adjusted to switch the runoff path and water outlet direction in advance, and the excess runoff is discharged after the underground prefabricated water storage unit is saturated.

[0015] Step 5. Landscape Maintenance

[0016] Routine pruning and cleaning of dead branches and leaves, and quarterly soil loosening and aeration operations in green areas to break up the surface crust and restore the infiltration rate.

[0017] In addition, the integrated construction and drainage optimization method for sponge city landscape sites proposed in this application may also have the following additional technical features:

[0018] Specifically, the steps for constructing the three-level diversion path described in step 1 are as follows:

[0019] Step 1-1. Laying the substrate

[0020] The vertical micro-topography was modified along the direction of the site's water flow, and then the planting soil layer, composite modified matrix layer and broken soil layer were deployed from top to bottom;

[0021] Step 1-2. Deploy perforated water collection pipes

[0022] Deploy perforated water collection pipes within the broken soil layer, then point the inlet holes on the perforated water collection pipe walls upwards, and connect the outlet end of the perforated water collection pipes to the open landscape water storage unit via a control valve;

[0023] Steps 1-3. Planting landscape plant communities

[0024] Plant emergent wetland plants along the direction of water flow on the water-facing side, plant moisture-tolerant perennial flowers in the middle, and plant mesophytic ground cover at the edge of the site.

[0025] Specifically, permeable geotextiles are laid between adjacent layers of the planting soil layer, the composite modified matrix layer, and the crushed stone layer. The composite modified matrix layer is made of zeolite, biochar, and modified ceramsite mixed in a volume ratio of 3:2:1, and the thickness of the composite modified matrix layer is 40-60cm.

[0026] Specifically, the open landscape water storage unit includes a landscape pool, a dry stream, or a landscape regulating pond. The inlet of the open landscape water storage unit is equipped with a bypass interface and a purified water interface. The bypass interface directly receives runoff water from the site, and the purified water interface is connected to the outlet of the perforated water collection pipe through a control valve.

[0027] Specifically, the underground prefabricated water storage unit is located below the green space or walkway of the site. The water inlet of the underground prefabricated water storage unit is connected to the water outlet of the perforated water collection pipe through a control valve, and the underground prefabricated water storage unit is equipped with an overflow outlet.

[0028] Specifically, in the real-time data acquisition and transmission described in step 3, the establishment of a stable data transmission network includes a transmission architecture with redundant wireless sensor networks and wired transmission networks, providing data transmission channels for the sensors of each data acquisition node.

[0029] Specifically, the current weather information includes real-time rainfall status, real-time rainfall amount, and real-time rainfall intensity, while the weather forecast information includes the probability of rainfall occurring within a preset time period, rainfall intensity level, cumulative forecast rainfall amount, peak rainfall intensity, and duration of rainfall.

[0030] Specifically, the opening and closing of the regulating control valve, which switches the runoff path and water outlet direction in advance, and discharges excess runoff after the underground prefabricated water storage unit is saturated, includes: when the rainfall intensity is less than a first preset threshold, opening the control valve between the open landscape water storage unit and the perforated water collection pipe to guide rainwater into the open landscape water storage unit for storage; when the rainfall intensity is greater than a second preset threshold, opening the control valve between the underground prefabricated water storage unit and the open landscape water storage unit to lower the water level of the open landscape water storage unit; during the rainfall process, when the real-time water level of the underground prefabricated water storage unit reaches saturation, automatically opening the control valve at the overflow outlet to discharge excess water into the surrounding natural water bodies and municipal stormwater pipe network through the overflow outlet.

[0031] Specifically, when the rainfall intensity is between the first preset threshold and the second preset threshold, the control valve between the underground prefabricated water storage unit and the perforated water collection pipe is opened, and the control valve between the open landscape water storage unit and the perforated water collection pipe is closed, so that the rainwater is introduced into the underground prefabricated water storage unit for storage.

[0032] Specifically, in the landscape maintenance described in step 5, the depth of the soil loosening and drilling in the green area is 15cm-20cm, and the spacing between the holes is 8-12cm.

[0033] Compared with existing technologies, this application has the following beneficial effects: The integrated construction and drainage optimization method for sponge-type urban landscape sites proposed in this application realizes the advance judgment of rainfall intensity by collecting real-time meteorological monitoring data and meteorological forecast data, and switches the drainage path according to different rainfall intensities, forming a hierarchical regulation of open water storage and reuse for light rain, underground closed water storage and consumption reduction for medium rain, and regulation and overflow for heavy rain. This prevents the waste of resources in light rain and the easy occurrence of waterlogging in heavy rain, and improves the utilization rate of rainwater resources. At the same time, through the gradient structure setting, the layered water retention, adsorption and interception and soil and water conservation functions of plant communities are utilized to further improve the rainwater retention, water purification and runoff diversion capacity of sponge landscape sites while improving the aesthetics of sponge-type urban landscape sites.

[0034] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0035] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0036] Figure 1 This is a flowchart illustrating the steps of an integrated method for creating and optimizing drainage in a sponge-type urban landscape according to an embodiment of this application. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0038] The following describes an embodiment of the present application of a method for integrated creation and drainage optimization of sponge-type urban landscape sites, with reference to the accompanying drawings.

[0039] like Figure 1 As shown in the embodiment of this application, a method for integrated creation and drainage optimization of sponge city landscape sites is characterized by the following steps:

[0040] Step 1. Construct a three-level traffic routing path

[0041] Multiple layers of substrate are laid from top to bottom on the site. Perforated water collection pipes are installed at the bottom layer of the substrate. Then, landscape plant communities are planted on the surface substrate according to the terrain elevation difference.

[0042] Step 1, constructing a three-level traffic routing path, involves the following steps:

[0043] Step 1-1. Laying the substrate

[0044] The vertical micro-topography was modified along the direction of the site's water flow, and then the planting soil layer, composite modified matrix layer and broken soil layer were deployed from top to bottom;

[0045] Step 1-2. Deploy perforated water collection pipes

[0046] Deploy perforated water collection pipes within the broken soil layer, then point the inlet holes on the perforated water collection pipe wall upwards, and connect the outlet end of the perforated water collection pipe to the open landscape water storage unit through a control valve;

[0047] Steps 1-3. Planting landscape plant communities

[0048] Plant emergent wetland plants along the direction of water flow on the water-facing side, plant moisture-tolerant perennial flowers in the middle, and plant mesophytic ground cover at the edge of the site.

[0049] Permeable geotextiles are laid between adjacent layers of planting soil, composite modified matrix, and gravel. The composite modified matrix is ​​made of zeolite, biochar, and modified ceramsite mixed in a volume ratio of 3:2:1, and the thickness of the composite modified matrix is ​​40-60cm.

[0050] To illustrate, firstly, a bottom layer of gravel is laid, and perforated water collection pipes are installed inside the gravel layer with the inlet holes facing upwards to ensure that infiltrated rainwater can flow into the perforated water collection pipes. Next, a composite modified substrate layer and a planting soil layer are laid on the gravel layer in sequence, and a permeable geotextile is laid between each layer to achieve water isolation and prevent fine soil particles from the upper layer from moving down and clogging the pores of the lower gravel layer. After the substrate is laid, plant communities are planted in sections along the direction of water flow. Among them, emergent wetland plants such as Thalia dealbata and aquatic iris are given priority on the water-facing side of the site, and moisture-tolerant perennial flowers such as iris and Sedum spectabile are planted in the central area of ​​the site to enrich the landscape layers. Mesophytic ground cover plants such as Kentucky bluegrass and Zoysia japonica are planted at the edge of the site to improve the stability of rainwater infiltration and drainage.

[0051] Step 2. Construct a water storage unit

[0052] An open landscape water storage unit and an underground prefabricated water storage unit are set up. The open landscape water storage unit and the underground prefabricated water storage unit are connected through a control valve. Liquid level sensors and water quality sensors are installed in the open landscape water storage unit and the underground prefabricated water storage unit. Then, the open landscape water storage unit is connected to the perforated water collection pipe through a control valve.

[0053] The underground prefabricated water storage unit is located under the green space or walkway of the site. The water inlet of the underground prefabricated water storage unit is connected to the water outlet of the perforated water collection pipe through a control valve, and the underground prefabricated water storage unit is equipped with an overflow outlet.

[0054] For example, the open landscape water storage unit can directly collect surface runoff rainwater through a bypass interface, while the purified water interface connects to the outlet of the perforated collection pipe through a control valve to achieve separate collection of purified rainwater. The underground prefabricated water storage unit is set in the empty soil layer under the green space or walkway of the site, without occupying the ground landscape space. With the help of built-in liquid level sensors and water quality sensors, the water level, turbidity and pollution indicators of the stored water can be monitored in real time. Drainage can be dynamically adjusted according to the water storage capacity and water quality status. In addition, when the rainfall is heavy and the water storage unit reaches its saturation capacity, the excess rainwater can be orderly introduced into the municipal rainwater pipe network or the surrounding natural water bodies to avoid backflow and accumulation of runoff on the site, thus achieving optimized control of landscape water storage, water purification, regulation and emergency drainage.

[0055] Step 3. Real-time data acquisition and transmission

[0056] Establish a stable data transmission network to transmit the current weather information and weather forecast information collected by the sensors to the data center to determine the intensity of future rainfall.

[0057] In step 3, real-time data acquisition and transmission, a stable data transmission network is established, including a transmission architecture with redundant wireless sensor networks and wired transmission networks, providing data transmission channels for the sensors of each data acquisition node.

[0058] Current weather information includes real-time rainfall status, real-time rainfall amount, and real-time rainfall intensity. Weather forecast information includes the probability of rainfall occurring within a preset time period, rainfall intensity level, cumulative forecast rainfall, peak rainfall intensity, and duration of rainfall.

[0059] To illustrate with an example, firstly, by collecting real-time on-site rainfall data and meteorological forecast data, parameters such as the probability of rainfall occurrence, intensity level, cumulative rainfall, peak intensity, and duration of rainfall within a preset time period can be obtained. By analyzing the real-time and forecast data, the upcoming rainfall conditions and water catchment pressure can be assessed before the rainfall peak arrives, allowing for preventative measures to be taken in advance. This improves the drainage effect of sponge city landscape sites and avoids problems such as rainwater retention and drainage obstruction.

[0060] Step 4. Develop optimization strategies

[0061] Based on the judgment, the on / off state of the control valve is adjusted to switch the runoff path and water outlet direction in advance, and the excess runoff is discharged after the underground prefabricated water storage unit is saturated.

[0062] The system adjusts the opening and closing of the control valve to switch the runoff path and outflow direction in advance, and discharges excess runoff after the underground prefabricated water storage unit is saturated. This includes: when the rainfall intensity is less than the first preset threshold, opening the control valve between the open landscape water storage unit and the perforated water collection pipe to guide rainwater into the open landscape water storage unit for storage; when the rainfall intensity is greater than the second preset threshold, opening the control valve between the underground prefabricated water storage unit and the open landscape water storage unit to lower the water level of the open landscape water storage unit; during rainfall, when the real-time water level of the underground prefabricated water storage unit reaches saturation, automatically opening the control valve at the overflow outlet to discharge excess water into the surrounding natural water bodies and municipal stormwater pipe network through the overflow outlet.

[0063] When the rainfall intensity is between the first preset threshold and the second preset threshold, the control valve between the underground prefabricated water storage unit and the perforated water collection pipe is opened, and the control valve between the open landscape water storage unit and the perforated water collection pipe is closed, so that the rainwater is introduced into the underground prefabricated water storage unit for storage.

[0064] For example, when the real-time rainfall intensity is less than a first preset threshold, the control valve between the open landscape water storage unit and the perforated collection pipe is opened, and the inlet valve of the underground prefabricated water storage unit is closed. The rainwater, after infiltration and purification, is then introduced into the open landscape water storage unit for daily landscape irrigation and water replenishment, thus realizing the utilization of rainwater resources. When the rainfall intensity is between the first and second preset thresholds, the control valve connecting the open landscape water storage unit and the perforated collection pipe is closed, and the inlet control valve of the underground prefabricated water storage unit is opened, allowing the rainwater to be introduced into the underground sealed water storage unit for storage. The open landscape water storage unit is only used to collect surface runoff rainwater to improve water storage efficiency. When the rainfall intensity exceeds the second threshold, the connection control valve between the open landscape water storage unit and the underground prefabricated water storage unit is opened simultaneously. When the water level reaches the saturation threshold, the overflow outlet control valve is opened to discharge the rainwater that cannot be stored into the surrounding natural water bodies or municipal rainwater pipe network. This avoids the problems of water accumulation and rainwater overflow on the site, solves the problems of poor rainfall adaptability, peak drainage congestion, and water overflow in traditional sponge sites, and improves the rainwater absorption and safe drainage capacity of sponge-type urban landscape sites.

[0065] Step 5. Landscape Maintenance

[0066] Routine pruning and cleaning of dead branches and leaves, and quarterly soil loosening and aeration operations in green areas to break up the surface crust and restore the infiltration rate.

[0067] In step 5 of landscape maintenance, the depth of soil loosening and drilling in green areas should be 15cm-20cm, and the spacing between holes should be 8-12cm.

[0068] For example, firstly, in the daily maintenance process, timely cleaning of dead branches, fallen leaves, weeds, debris, and silt is carried out to prevent vegetation residue from accumulating and covering the surface or seeping into the matrix pores and causing blockage. In addition, targeted soil loosening and aeration operations are carried out once a quarter to unclog the internal pores of the planting soil layer and the composite modified matrix layer, slow down the rate of matrix blockage and functional degradation, and ensure the long-term stable operation of the drainage system in the sponge-type urban landscape.

[0069] In summary, this application's integrated method for creating and optimizing drainage in sponge-type urban landscape sites, by collecting real-time meteorological monitoring and forecast data, enables advance assessment of rainfall intensity. Based on different rainfall intensities, drainage paths are switched, forming a tiered control system: open-type water storage and reuse for light rain, closed-type underground water storage and energy conservation for moderate rain, and overflow regulation for heavy rain. This prevents resource waste during light rain and waterlogging during heavy rain, improving rainwater resource utilization. Furthermore, through a gradient structure, the stratified water retention, adsorption, interception, and soil and water conservation functions of plant communities are utilized, enhancing the aesthetic appeal of sponge-type urban landscape sites while further improving their rainwater retention, water purification, and runoff diversion capabilities.

[0070] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for integrated creation and drainage optimization of sponge-type urban landscape sites, characterized in that, Includes the following steps: Step 1. Construct a three-level traffic routing path Multiple layers of substrate are laid from top to bottom on the site. Perforated water collection pipes are laid at the bottom layer of the substrate. Then, landscape plant communities are planted on the surface substrate according to the terrain elevation difference. Step 2. Construct a water storage unit An open landscape water storage unit and an underground prefabricated water storage unit are set up. The open landscape water storage unit and the underground prefabricated water storage unit are connected through a control valve. Liquid level sensors and water quality sensors are installed in the open landscape water storage unit and the underground prefabricated water storage unit. Then, the open landscape water storage unit is connected to the perforated water collection pipe through a control valve. Step 3. Real-time data acquisition and transmission Establish a stable data transmission network to transmit the current weather information and weather forecast information collected by the sensors to the data center to determine the intensity of future rainfall; Step 4. Develop optimization strategies Based on the judgment, the on / off state of the control valve is adjusted to switch the runoff path and water outlet direction in advance, and the excess runoff is discharged after the underground prefabricated water storage unit is saturated. Step 5. Landscape Maintenance Routine pruning and cleaning of dead branches and leaves, and quarterly soil loosening and aeration operations in green areas to break up the surface crust and restore the infiltration rate.

2. The method for integrated construction and drainage optimization of sponge city landscape sites according to claim 1, characterized in that, The specific steps for constructing the three-level traffic routing path described in step 1 are as follows: Step 1-1. Laying the substrate The vertical micro-topography was modified along the direction of the site's water flow, and then the planting soil layer, composite modified matrix layer and broken soil layer were deployed from top to bottom; Step 1-2. Deploy perforated water collection pipes Deploy perforated water collection pipes within the broken soil layer, then point the inlet holes on the perforated water collection pipe walls upwards, and connect the outlet end of the perforated water collection pipes to the open landscape water storage unit via a control valve; Steps 1-3. Planting landscape plant communities Plant emergent wetland plants along the direction of water flow on the water-facing side, plant moisture-tolerant perennial flowers in the middle, and plant mesophytic ground cover at the edge of the site.

3. The method for integrated construction and drainage optimization of sponge city landscape sites according to claim 2, characterized in that, The adjacent layers of the planting soil layer, the composite modified matrix layer and the crushed stone layer are respectively laid with permeable geotextile, and the composite modified matrix layer is made of zeolite, biochar and modified ceramsite mixed in a volume ratio of 3:2:1, and the thickness of the composite modified matrix layer is 40-60cm.

4. The integrated construction and drainage optimization method for sponge city landscape sites according to claim 3, characterized in that, The open landscape water storage unit includes a landscape pool, a dry stream, or a landscape regulating pond. The water inlet of the open landscape water storage unit is equipped with a bypass interface and a purified water interface. The bypass interface directly receives runoff water from the site, and the purified water interface is connected to the outlet of the perforated water collection pipe through a control valve.

5. The integrated construction and drainage optimization method for sponge city landscape sites according to claim 4, characterized in that, The underground prefabricated water storage unit is located below the green space or walkway of the site. The water inlet of the underground prefabricated water storage unit is connected to the water outlet of the perforated water collection pipe through a control valve, and the underground prefabricated water storage unit is equipped with an overflow outlet.

6. The method for integrated construction and drainage optimization of sponge city landscape sites according to claim 5, characterized in that, In step 3, the real-time data acquisition and transmission involves establishing a stable data transmission network, which includes a transmission architecture with redundant wireless sensor networks and wired transmission networks, providing data transmission channels for the sensors at each data acquisition node.

7. The integrated construction and drainage optimization method for sponge city landscape sites according to claim 6, characterized in that, The current weather information includes real-time rainfall status, real-time rainfall amount, and real-time rainfall intensity. The weather forecast information includes the probability of rainfall occurring within a preset time period, rainfall intensity level, cumulative forecast rainfall amount, peak rainfall intensity, and duration of rainfall.

8. The method for integrated construction and drainage optimization of sponge city landscape sites according to claim 7, characterized in that, The opening and closing of the regulating control valve switches the runoff path and outlet direction in advance, and discharges excess runoff after the underground prefabricated water storage unit is saturated, including: When the rainfall intensity is less than the first preset threshold, the control valve between the open landscape water storage unit and the perforated water collection pipe is opened to guide the rainwater into the open landscape water storage unit for storage. When the rainfall intensity exceeds the second preset threshold, the control valve between the underground prefabricated water storage unit and the open landscape water storage unit is opened to lower the water level of the open landscape water storage unit. During the rainfall, when the real-time water level of the underground prefabricated water storage unit reaches saturation, the control valve at the overflow outlet is automatically opened to discharge the excess water into the surrounding natural water bodies and municipal stormwater pipe network through the overflow outlet.

9. The method for integrated construction and drainage optimization of sponge city landscape sites according to claim 8, characterized in that, When the rainfall intensity is between the first preset threshold and the second preset threshold, the control valve between the underground prefabricated water storage unit and the perforated water collection pipe is opened, and the control valve between the open landscape water storage unit and the perforated water collection pipe is closed, so that the rainwater is introduced into the underground prefabricated water storage unit for storage.

10. The method for integrated construction and drainage optimization of sponge city landscape sites according to claim 9, characterized in that, In the landscape maintenance described in step 5, the depth of the soil loosening and drilling in the green area is 15cm-20cm, and the spacing between the holes is 8-12cm.

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