A multifunctional coupling system for early rainwater in mountainous areas

Abstract

The application provides a mountainous region initial rainwater multifunctional coupling system, comprising: a interception energy dissipation initial rainwater purification module, an ecological retention deep purification module and a clear water recycling module; the interception energy dissipation initial rainwater purification module is used for intercepting the initial rainwater of the mountainous region, and the intercepted initial rainwater is subjected to energy dissipation and purification; the ecological retention deep purification module is used for receiving and processing the water body from the interception energy dissipation initial rainwater purification module, and the suspended solids in the water body are promoted to precipitate by prolonging the residence time of the water body; the clear water recycling module is used for conveying the purified water body to each water use point. The four functions of interception-energy dissipation-purification-landscape are integrated into one, not only solving the problem of mountainous region initial rainwater treatment, but also realizing the fundamental change from passive prevention to active production of water resources.

Description

Technical Field

[0001] This application relates to the fields of environmental protection and municipal engineering technology, and in particular to a multifunctional coupling system for initial rainwater in mountainous areas. Background Technology

[0002] With the acceleration of urbanization, the development and construction of mountain cities are increasing. Due to their unique topography, mountainous areas present the following prominent problems during rainfall: rapid runoff velocity and large peak flow.

[0003] Currently, initial stormwater treatment typically employs traditional intercepting wells, storage ponds, and constructed wetlands, focusing on water storage or purification. However, high-energy stormwater runoff has tremendous scouring force, easily leading to damage or inefficiency of treatment facilities. For energy dissipation, traditional structures such as energy dissipation sills and drop structures are used, focusing on interception and energy dissipation without purification and reuse functions. There is a lack of systematic consideration for the entire process of "interception-purification-energy dissipation-reuse," and the overall layout is scattered, occupying a large area, with high construction and maintenance costs, and failing to organically combine ecological benefits with landscape value. Furthermore, traditional mountain drainage facilities (such as concrete drainage ditches, steep channels, and stilling basins) have a single function, focusing only on drainage and energy dissipation, with a rigid and abrupt appearance that is incompatible with the surrounding natural ecological environment and destroys the natural landscape aesthetics of the mountains.

[0004] Therefore, there is an urgent need for a systematic solution that can organically couple the four functions of interception, energy dissipation, purification and landscape creation of initial rainwater in mountainous areas into one system, so as to achieve multiple goals of efficient space utilization, cost-effectiveness optimization and ecological landscape enhancement. Summary of the Invention

[0005] The purpose of this application is to provide a multi-functional coupling system for initial rainwater runoff in mountainous areas, including the system itself, electronic equipment, and storage medium. This system can solve the problems of existing technologies failing to organically couple the four functions of interception, energy dissipation, purification, and landscape creation of initial rainwater runoff in mountainous areas into a single system, resulting in inefficient space utilization, high maintenance costs, and a disconnect between the ecological landscape and the surrounding environment.

[0006] In a first aspect, embodiments of this application provide a multifunctional coupling system for initial rainfall in mountainous areas, comprising:

[0007] The interception and energy dissipation initial rainwater purification module (2) is used to intercept the initial rainwater in mountainous areas and to dissipate and purify the intercepted initial rainwater.

[0008] The ecological retention deep purification module (3) is used to receive and process water from the interception and energy dissipation initial rainwater purification module (2), and promotes the sedimentation of suspended solids in the water by extending the water's residence time; the outlet of the interception and energy dissipation initial rainwater purification module (2) is connected to the inlet of the ecological retention deep purification module (3);

[0009] The clean water reuse module (4) is used to transport the purified water to each water use point; the end outlet of the ecological retention deep purification module (3) is connected to the clean water reuse module (4).

[0010] Optionally, the interception and energy dissipation initial rainwater purification module (2) includes: an initial rainwater interception unit (21), an energy dissipation landscape stacked stone unit (22), a multi-stage extended diameter purification unit (23), and an elevated landscape water storage overflow unit (24).

[0011] The initial rainwater interception unit (21) is used to intercept initial rainwater in mountainous areas;

[0012] The energy-dissipating landscape stacked stone unit (22) is arranged above the initial rainwater interception unit (21) and is used to dissipate energy in the water body by means of water flow top flushing;

[0013] The multi-stage extended-path purification unit (23) is used to receive the water after energy dissipation and extend the path of the water;

[0014] The elevated landscape water storage overflow unit (24) is used to receive the water flowing out of the energy dissipation landscape stacked stone unit (22) and form a multi-level extended water flow path through the water storage structure; the treated water overflows through the drop weir on the outer ring of the elevated landscape water storage overflow unit (24) and enters the ecological retention deep purification module (3).

[0015] Optionally, the rainwater interception unit (21) consists of a rainwater pipe outlet dam (211), a rainwater pipe (212), a flushing pipe (213), and a flushing control valve (214);

[0016] The rainwater pipe outlet pier (211) is made of reinforced concrete to effectively resist the impact and vibration of high-speed water flow;

[0017] The rainwater pipe (212) is used to receive initial rainwater in mountainous areas;

[0018] The flushing pipe (213) connects the multi-stage extended diameter purification unit (23) and the rainwater pipe (212).

[0019] The flushing control valve (214) is used to control the water flow in the flushing pipe (213); by controlling the water in the flushing pipe (213), the sediment in the rainwater pipe (212) is cleaned regularly, and the multi-stage extended diameter purification unit (23) is maintained for siltation.

[0020] Optionally, the energy-dissipating landscape stacked stone unit (22) is composed of landscape stacked stones (221), top impact plate (222), supporting column (223), high-strength wear-resistant and impact-resistant stainless steel plate (224) and corrugated multi-stage elongated weathering steel plate (225).

[0021] The top impact plate (222) and the high-strength wear-resistant and impact-resistant stainless steel plate (224) are used to receive the potential energy of the water flowing out of the rainwater pipe (212) and to dissipate the energy of the water.

[0022] The corrugated multi-stage elongated weathering steel plate (225) is used to extend the flow path of water.

[0023] The supporting column (223) is used to support the top plate (222) and the landscape stacked stones (221).

[0024] The landscape rockery (221) is used to provide a landscape.

[0025] Optionally, the high-strength wear-resistant and impact-resistant stainless steel plate (224) is made of high-strength stainless steel; the corrugated multi-stage elongated weathering steel plate (225) is made of weathering steel and designed as a corrugated structure.

[0026] Optionally, the multi-stage extended diameter purification unit (23) is composed of a gravel interception layer (231), a zeolite adsorption purification layer (232), and an emergent plant layer (233).

[0027] The gravel trapping layer (231) is located at the front end of the multi-stage extended diameter purification unit (23) and is used to trap large suspended particles in the water.

[0028] The zeolite adsorption purification layer (232) is located after the gravel interception layer (231) and is used to filter fine particles in the water and adsorb dissolved pollutants.

[0029] The emergent plant layer (233) is planted on the surface of the multi-level extended diameter purification unit (23) to deepen purification through the root system of the emergent plants and provide a landscape.

[0030] Optionally, the elevated landscape water storage overflow unit (24) consists of a circular water storage base (241), a pebble ecological finish (242), a silt drain pipe (243), a silt drain control valve (244), and an elevated landscape support pier (245).

[0031] The circular water storage substrate (241) is used to provide a purification container and hydraulic conditions for the multi-stage extended diameter purification unit (23);

[0032] The pebble ecological finish (242) is used to enhance structural durability and landscape integration;

[0033] The sludge discharge pipe (243) is connected to the circular water storage substrate (241) and works in conjunction with the sludge discharge control valve (244) to clean and maintain the sediment in the circular water storage substrate (241);

[0034] The elevated landscape support pier (245) provides structural support for the elevated landscape water storage overflow unit (24) and provides visual landscape.

[0035] Optionally, the ecological retention deep purification module (3) includes an aquatic plant layer (31) and a submerged plant layer (32); the roots of the plants in the aquatic plant layer (31) and the submerged plant layer (32) slow down the flow rate of the water and prolong the retention of the water.

[0036] Optionally, the clean water reuse module (4) includes: an inlet pipe (41), a reuse well (42), a reuse pump (43), a butterfly valve well (44), a butterfly valve (45), and an outlet pipe (46).

[0037] The inlet pipe (41) is used to guide the purified water into the reuse well (42).

[0038] The purified water in the reuse well (42) is pumped into the butterfly valve well (44) after being lifted by the reuse pump (43), and then enters the outlet pipe (46) through the butterfly valve (45).

[0039] The outlet pipe (46) is used to transport the purified water to each water point.

[0040] Optionally, the water usage points include at least: greening irrigation water usage points, landscape water replenishment water usage points, and road sweeping water usage points.

[0041] Compared with the prior art, the embodiments of this application have the following advantages:

[0042] In this embodiment, the multifunctional coupled system for initial rainwater runoff in mountainous areas includes: an interception and energy dissipation initial rainwater purification module, an ecological retention and deep purification module, and a clean water reuse module. The interception and energy dissipation initial rainwater purification module is used to intercept initial rainwater in mountainous areas and to dissipate and purify the intercepted initial rainwater. The ecological retention and deep purification module is used to receive and treat the water from the interception and energy dissipation initial rainwater purification module, promoting the sedimentation of suspended solids in the water by extending the water's residence time. The clean water reuse module is used to transport the purified water to various water use points. By integrating the four functions of "interception, energy dissipation, purification, and landscaping," this system not only solves the problem of initial rainwater treatment in mountainous areas but also achieves a fundamental shift from passive prevention to active "production" of water resources. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic plan view of a multifunctional coupling system for initial rainwater in mountainous areas provided in an embodiment of this application;

[0045] Figure 2 This is a cross-sectional schematic diagram of a multifunctional coupling system for initial rainwater in mountainous areas provided in an embodiment of this application;

[0046] Figure 3 This is another cross-sectional schematic diagram of a multi-functional coupling system for initial rainwater in mountainous areas provided in an embodiment of this application;

[0047] Figure 4 This is a plan view of a rainwater interception and energy dissipation module for initial rainwater purification provided in an embodiment of this application;

[0048] Figure 5 This is a cross-sectional schematic diagram of an initial rainwater purification module for interception and energy dissipation provided in an embodiment of this application.

[0049] Attached label: 1-Multifunctional coupling system for initial rainwater runoff in mountainous areas; 2-Interception and energy dissipation initial rainwater purification module; 3-Ecological retention and deep purification module; 4-Clear water reuse module; 21-Initial rainwater interception unit; 22-Energy dissipation landscape stacked stone unit; 23-Multi-stage extended-diameter purification unit; 24-Elevated landscape water storage and overflow unit; 211-Rainwater pipe outlet pier; 212-Rainwater pipe; 213-Flue and silt-removing pipe; 214-Sludge control valve; 221-Landscape stacked stones; 222-Top flushing plate; 223-Supporting column; 224-High-strength wear-resistant and impact-resistant stainless steel plate; 225-Corrugated multi-stage elongated weathering steel plate; 231-Gravel interception layer; 232-Zeolite adsorption and purification layer; 233-Emerging plants; 241-Circular water storage substrate; 242-Pebble ecological finish; 243-Sludge drain pipe; 244-Sludge drain control valve; 245-Elevated landscape support; 31-Aquatic plants; 32-Submerged plants; 41-Inlet pipe; 42-Reuse well; 43-Reuse pump; 44-Butterfly valve well; 45-Butterfly valve; 46-Outlet pipe. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0052] The following description, in conjunction with the accompanying drawings, details a multi-functional coupling system for initial rainwater runoff in mountainous areas, provided by this application, through specific embodiments and application scenarios.

[0053] With the acceleration of urbanization, the development and construction of mountain cities are increasing. Due to their unique topography, mountainous regions face the following prominent problems during rainfall:

[0054] 1. High runoff velocity and large peak flow: The steep slope and rapid flow cause rainwater runoff to accumulate quickly, putting enormous impact pressure on downstream drainage networks and river channels, which can easily lead to waterlogging and soil erosion.

[0055] 2. Severe pollution from initial rainwater runoff: In the early stages of rainfall, rainwater washes away pollutants from surfaces such as roads, roofs, and mountains, carrying large amounts of pollutants such as mud, organic matter, grease, and heavy metals. Its pollution load is much higher than that of rainwater runoff in the middle and later stages. If it is directly discharged into natural water bodies, it will cause serious pollution.

[0056] 3. Limited Functionality: Currently, initial stormwater treatment typically employs traditional intercepting wells, storage ponds, and constructed wetlands, primarily focusing on water storage or purification. However, these methods can easily damage or reduce the efficiency of treatment facilities due to the significant scouring force of high-potential-energy stormwater runoff. Energy dissipation is addressed using traditional structures such as energy dissipation sills and drop structures, which mainly focus on interception and energy dissipation without purification and reuse capabilities. While these measures are effective, they are often fragmented and lack a systematic consideration of the entire process of interception-purification-energy dissipation-reuse. Furthermore, their dispersed layout results in large land areas, high construction and maintenance costs, and a failure to organically combine ecological benefits with landscape value.

[0057] 4. Incompatibility between ecology and landscape: Traditional mountain drainage facilities (such as concrete drainage ditches, steep channels, stilling basins, etc.) often have a single function, focusing only on drainage and energy dissipation. Their appearance is rigid and abrupt, which is out of place with the surrounding natural ecological environment and destroys the natural landscape beauty of the mountains.

[0058] Therefore, there is an urgent need in this field for a systematic solution that can organically couple the four functions of interception, energy dissipation, purification and landscape creation of initial rainwater in mountainous areas into one system, so as to achieve multiple goals of efficient space utilization, cost-effectiveness optimization and ecological landscape enhancement.

[0059] Reference Figures 1 to 3 This application illustrates a multifunctional coupling system for initial rainwater runoff in mountainous areas, comprising: an interception and energy dissipation initial rainwater purification module (2), an ecological retention and deep purification module (3), and a clean water reuse module (4); the interception and energy dissipation initial rainwater purification module (2) is used to intercept initial rainwater in mountainous areas and to dissipate and purify the intercepted initial rainwater; the ecological retention and deep purification module (3) is used to receive and process water from the interception and energy dissipation initial rainwater purification module (2) and promote the sedimentation of suspended solids in the water by extending the water's residence time; the outlet of the interception and energy dissipation initial rainwater purification module (2) is connected to the inlet of the ecological retention and deep purification module (3); the clean water reuse module (4) is used to transport the purified water to various water use points; the end outlet of the ecological retention and deep purification module (3) is connected to the clean water reuse module (4).

[0060] In this embodiment, the multi-functional coupling system for initial rainwater in mountainous areas achieves full-process purification of initial rainwater through multi-functional coupling and systematic integration. It integrates four major functions: interception, energy dissipation, purification, and landscaping. Through the series design of the initial rainwater purification module (2), the ecological retention deep purification module (3), and the clean water reuse module (4), a complete and continuous initial rainwater treatment system for mountains is constructed, from source control and process treatment to resource reuse. This system not only solves the problem of initial rainwater treatment in mountains, but also realizes a fundamental transformation from passive prevention to active "production" of water resources.

[0061] In some embodiments, refer to Figures 4 to 5 The illustration shows the interception and energy dissipation initial rainwater purification module provided in the embodiment of this application. The interception and energy dissipation initial rainwater purification module (2) includes: initial rainwater interception unit (21), energy dissipation landscape stacked stone unit (22), multi-stage extended diameter purification unit (23) and elevated landscape water storage overflow unit (24).

[0062] The initial rainwater interception unit (21) is used to intercept initial rainwater in mountainous areas;

[0063] The energy-dissipating landscape stacked stone unit (22) is arranged above the initial rainwater interception unit (21) and is used to dissipate energy in the water body by means of water flow top flushing;

[0064] The multi-stage extended-path purification unit (23) is used to receive the water after energy dissipation and extend the path of the water;

[0065] The elevated landscape water storage overflow unit (24) is used to receive the water flowing out of the energy dissipation landscape stacked stone unit (22) and form a multi-level extended water flow path through the water storage structure; the treated water overflows through the drop weir on the outer ring of the elevated landscape water storage overflow unit (24) and enters the ecological retention deep purification module (3).

[0066] In its implementation, the initial rainwater interception unit (21) initially intercepts the initial rainwater in the mountainous area; the energy-dissipating landscape stacked stone unit (22) is arranged above the initial rainwater interception module. Since the water introduced from the initial rainwater in the mountainous area flows from high to low and has gravitational potential energy, it will gush upwards after passing through the initial rainwater interception unit (21). Therefore, the energy-dissipating landscape stacked stone unit (22) can utilize this situation to dissipate the energy of the water by the top flow, and combine the top energy-dissipating and anti-erosion structure to set up landscape stacked stones, which also has the functions of landscape. Aesthetic and environmental functions; Multi-stage extended-path purification unit (23) receives water after energy dissipation, and achieves primary purification of initial rainwater by extending the water path and multi-stage purification treatment; Elevated landscape water storage overflow unit (24) is used to receive the water outflow of the energy dissipation landscape stacked stone module, and forms a multi-stage extended-path water flow path through its water storage structure, providing purification container and hydraulic conditions for the multi-stage extended-path purification module; The treated water overflows through the drop weir on the outer ring of the module and enters the ecological retention pond. This module has both landscape viewing and water storage functions.

[0067] In some embodiments, the rainwater interception unit (21) consists of a rainwater pipe outlet dam (211), a rainwater pipe (212), a flushing pipe (213), and a flushing control valve (214);

[0068] The rainwater pipe outlet pier (211) is made of reinforced concrete to effectively resist the impact and vibration of high-speed water flow;

[0069] The rainwater pipe (212) is used to receive initial rainwater in mountainous areas;

[0070] The flushing pipe (213) connects the multi-stage extended diameter purification unit (23) and the rainwater pipe (212).

[0071] The flushing control valve (214) is used to control the water flow in the flushing pipe (213); by controlling the water in the flushing pipe (213), the sediment in the rainwater pipe (212) is cleaned regularly, and the multi-stage extended diameter purification unit (23) is maintained for siltation.

[0072] In practice, the initial rainwater in the mountainous area is collected into the system through the rainwater pipe (212) and first enters the initial rainwater interception unit (21). The rainwater pipe outlet pier (211) at the entrance of the unit is made of reinforced concrete cast on site. Its weight and structure can effectively resist the impact and vibration of high-speed water flow, ensuring the long-term stability of the rainwater inlet and providing a reliable foundation for subsequent treatment processes.

[0073] When it is necessary to clean the sediment in the rainwater pipe (212) regularly, the sediment in the rainwater pipe (212) is cleaned regularly by controlling the water in the flushing pipe (213), and the multi-stage extended diameter purification unit (23) is maintained for siltation.

[0074] In some embodiments, the energy-dissipating landscape stacked stone unit (22) is composed of landscape stacked stones (221), top impact plate (222), support column (223), high-strength wear-resistant and impact-resistant stainless steel plate (224) and corrugated multi-stage elongated weathering steel plate (225);

[0075] The top impact plate (222) and the high-strength wear-resistant and impact-resistant stainless steel plate (224) are used to receive the potential energy of the water flowing out of the rainwater pipe (212) and to dissipate the energy of the water.

[0076] The corrugated multi-stage elongated weathering steel plate (225) is used to extend the flow path of water.

[0077] The supporting column (223) is used to support the top plate (222) and the landscape stacked stones (221).

[0078] The landscape rockery (221) is used to provide a landscape.

[0079] Since the water introduced from the initial rainwater in the mountainous area has gravitational potential energy as it flows from high to low, it will gush upward after passing through the initial rainwater interception unit (21). Therefore, it is necessary to carry out landscape energy dissipation treatment on the water body through the energy dissipation landscape stacked stone unit (22).

[0080] In the specific implementation, after the water flows into the energy dissipation landscape stacked stone unit (22), it will first impact the top impact plate (222) and the high-strength wear-resistant and impact-resistant stainless steel plate (224) to dissipate energy. The high-strength wear-resistant and impact-resistant stainless steel plate (224) is made of high-strength stainless steel. Subsequently, the water flow path is extended and the purification channel is enhanced by the corrugated multi-stage extended diameter weathering steel plate (225). The corrugated multi-stage extended diameter weathering steel plate (225) is made of weathering steel and designed as a corrugated structure.

[0081] Considering the strong impact force of water on the top impact plate (222), landscape stacked stones (221) are set above the top impact plate (222). The weight provided by the landscape stacked stones (221) optimizes the structural stability and prevents the top impact plate (222) from shaking due to the impact force of water. On the other hand, it provides a visual landscape effect, realizing the multi-functional synergy of energy reduction, pollution control and ecological beautification.

[0082] This embodiment achieves the step-by-step removal of pollutants and integration with the landscape through a "tiered collaborative" interception and energy dissipation technology: Inside the initial rainwater purification module (2) of interception and energy dissipation, a four-level collaborative purification architecture (interception → energy dissipation → extended path purification → overflow storage) is adopted to achieve the step-by-step removal of pollutants from coarse to fine. In particular, the energy dissipation landscape stacked stone unit (22) adopts a combination of high-strength wear-resistant and impact-resistant stainless steel plate (224) and corrugated multi-level extended path weathering steel plate (225). While efficiently dissipating energy and extending the hydraulic path, the engineering facilities are transformed into a natural landscape through the configuration of landscape stacked stones (221).

[0083] In some embodiments, the multi-stage extended diameter purification unit (23) is composed of a gravel interception layer (231), a zeolite adsorption purification layer (232), and an emergent plant layer (233).

[0084] The gravel trapping layer (231) is located at the front end of the multi-stage extended diameter purification unit (23) and is used to trap large suspended particles in the water.

[0085] The zeolite adsorption purification layer (232) is located after the gravel interception layer (231) and is used to filter fine particles in the water and adsorb dissolved pollutants.

[0086] The emergent plant layer (233) is planted on the surface of the multi-level extended diameter purification unit (23) to deepen purification through the root system of the emergent plants and provide a landscape.

[0087] In a more specific implementation, the water body after energy dissipation enters the multi-stage extended-path purification unit (23). The multi-stage extended-path purification unit is equipped with a multi-stage filtration mechanism. First, large particulate suspended matter in the water body is intercepted through the gravel interception layer (231). Then, fine particles and dissolved pollutants in the water body are filtered through the zeolite adsorption purification layer (232). Finally, the water body is further purified through the roots of the emergent plants planted in the emergent plant layer (233) and provides a landscape, thus achieving deep purification that is both ecological and landscape-oriented.

[0088] This embodiment utilizes a multi-stage extended-diameter purification unit (23) with a composite structure consisting of a gravel interception layer (231), a zeolite adsorption purification layer (232), and emergent plants (233). This achieves synergistic purification through physical filtration, adsorption, and plant absorption, deeply integrating purification functions with ecological landscape construction. Furthermore, all units emphasize landscape beautification, achieving a unity of pollution removal and filtration functions, ecological restoration, and landscape value.

[0089] In some embodiments, the elevated landscape water storage overflow unit (24) consists of a circular water storage base (241), a pebble ecological finish (242), a sludge discharge pipe (243), a sludge discharge control valve (244), and an elevated landscape support (245);

[0090] The circular water storage substrate (241) is used to provide a purification container and hydraulic conditions for the multi-stage extended diameter purification unit (23);

[0091] The pebble ecological finish (242) is used to enhance structural durability and landscape integration;

[0092] The sludge discharge pipe (243) is connected to the circular water storage substrate (241) and works in conjunction with the sludge discharge control valve (244) to clean and maintain the sediment in the circular water storage substrate (241);

[0093] The elevated landscape support pier (245) provides structural support for the elevated landscape water storage overflow unit (24) and provides visual landscape.

[0094] After energy dissipation and purification, the water body provides a purification container and hydraulic conditions for the multi-stage extended diameter purification unit through the circular water storage base (241). Its pebble ecological veneer (242) can improve the durability of the structure and the integration with the landscape. The elevated landscape support (245) provides structural support for the water storage facility, while creating visual landscape nodes and enhancing the spatial hierarchy and ecological aesthetics.

[0095] Furthermore, by laying a flushing and siltation pipe network at the bottom of the elevated landscape water storage overflow unit (24), the unique elevation difference potential energy of the mountainous area is used to transform it into a precise and automatic siltation driving force. Without the need for external energy supply, the multi-stage extended diameter purification unit (23) can be periodically flushed and silted, thus achieving long-term, efficient, and low-maintenance sustainable operation of the system.

[0096] The ecological retention deep purification module (3) includes an aquatic plant layer (31) and a submerged plant layer (32); the roots of the plants in the aquatic plant layer (31) and the submerged plant layer (32) slow down the flow of water and prolong the retention of water.

[0097] The purified water enters the ecological retention deep purification module (3) through overflow. In the ecological retention deep purification module (3), the flow velocity of the water is slowed down by energy dissipation and filtration, and suspended solids will further settle. The aquatic and submerged plants planted in the ecological retention deep purification module (3) can deeply purify the water through their roots. By extending the hydraulic retention time, the sedimentation of suspended solids is promoted. The ecological means of the aquatic plant layer (31) and the submerged plant layer (32) are used for deep purification. While significantly improving the quality of the effluent, the plant landscape effect is integrated to achieve the synergy of purification and landscape functions.

[0098] In some embodiments, the clean water reuse module (4) includes: an inlet pipe (41), a reuse well (42), a reuse pump (43), a butterfly valve well (44), a butterfly valve (45), and an outlet pipe (46).

[0099] The inlet pipe (41) is used to guide the purified water into the reuse well (42).

[0100] The purified water in the reuse well (42) is pumped into the butterfly valve well (44) after being lifted by the reuse pump (43), and then enters the outlet pipe (46) through the butterfly valve (45).

[0101] The outlet pipe (46) is used to transport the purified water to each water point.

[0102] After being purified by the ecological retention deep purification module (3), the water enters the reuse well (42) through the inlet pipe (41), is lifted by the reuse pump (43), and passes through the butterfly valve well (44) and butterfly valve (45) in sequence. Finally, it is transported to the end of the water supply through the outlet pipe (46) for use in greening irrigation, landscape water replenishment, road sweeping and ecological water replenishment, etc., realizing the sustainable use of water resources.

[0103] After the system has been running for a period of time, the management personnel can perform flushing and maintenance regularly (e.g., quarterly). During operation, first open the flushing control valve (214). The system uses the kinetic energy of the upstream water to form a high-speed jet at the bottom of the multi-stage extended diameter purification unit (23) through the flushing pipe (213), stirring and flushing the deposited silt. Then, simultaneously open the discharge control valve (244), and the stirred-up turbid mud-water mixture is discharged through the discharge pipe (243) to remove the regularly flushed sediment. The entire process requires no additional power and can be completed by the system's own hydraulic power, effectively solving the industry pain points of high cost and long cycle of manual dredging, and ensuring the continuous and efficient operation of the system.

[0104] This implementation achieves closed-loop water resource recycling, practices low-carbon and sustainable development, and transforms initial rainwater from a "burden" into a "second water source for the city". Through the end-of-pipe clean water reuse module (4), the water body is treated and reused on-site, and directly used for greening irrigation, landscape water replenishment, etc., which greatly reduces the dependence on municipal water supply. This not only creates direct economic benefits, but also builds an energy-saving, carbon-reducing, and self-sufficient water resource recycling micro-unit.

[0105] The multifunctional coupled system for initial rainwater runoff in mountainous areas, as described in this application, includes: an interception and energy dissipation initial rainwater purification module, an ecological retention and deep purification module, and a clean water reuse module. The interception and energy dissipation initial rainwater purification module intercepts initial rainwater in mountainous areas and dissipates and purifies the intercepted initial rainwater. The ecological retention and deep purification module receives and processes water from the interception and energy dissipation initial rainwater purification module, promoting the sedimentation of suspended solids in the water by extending its residence time. The clean water reuse module transports the purified water to various water usage points. By integrating the four functions of "interception, energy dissipation, purification, and landscaping," this system not only solves the problem of initial rainwater treatment in mountainous areas but also achieves a fundamental shift from passive prevention to active "production" of water resources.

[0106] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0107] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0108] The above are merely preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A multi-functional coupling system for initial rainwater in mountainous areas, characterized in that, include: The interception and energy dissipation initial rainwater purification module (2) is used to intercept the initial rainwater in mountainous areas and to dissipate and purify the intercepted initial rainwater. The ecological retention deep purification module (3) is used to receive and process water from the interception and energy dissipation initial rainwater purification module (2), and promotes the sedimentation of suspended solids in the water by extending the water's residence time; the outlet of the interception and energy dissipation initial rainwater purification module (2) is connected to the inlet of the ecological retention deep purification module (3); The clean water reuse module (4) is used to transport the purified water to each water use point; the end outlet of the ecological retention deep purification module (3) is connected to the clean water reuse module (4); The interception and energy dissipation initial rainwater purification module (2) includes: an initial rainwater interception unit (21), an energy dissipation landscape stacked stone unit (22), a multi-stage extended-path purification unit (23), and an elevated landscape water storage and overflow unit (24); the initial rainwater interception unit (21) is used to intercept the initial rainwater in the mountainous area; the energy dissipation landscape stacked stone unit (22) is arranged on the upper part of the initial rainwater interception unit (21) and is used to dissipate the water body by means of water flow top flushing; the multi-stage extended-path purification unit (23) is used to receive the water body after energy dissipation and extend the path of the water body; the elevated landscape water storage and overflow unit (24) is used to receive the water body flowing out of the energy dissipation landscape stacked stone unit (22) and form a multi-stage extended-path water flow through the water storage structure; the treated water body overflows and is discharged through the drop weir on the outer ring of the elevated landscape water storage and overflow unit (24) and enters the ecological retention deep purification module (3). The energy-dissipating landscape stacked stone unit (22) is composed of landscape stacked stones (221), a top impact plate (222), a supporting column (223), a high-strength wear-resistant and impact-resistant stainless steel plate (224), and a corrugated multi-stage extended diameter weathering steel plate (225). The top impact plate (222) and the high-strength wear-resistant and impact-resistant stainless steel plate (224) are used to receive the potential energy of the water flowing out of the rainwater pipe (212) and dissipate the energy of the water. The corrugated multi-stage extended diameter weathering steel plate (225) is used to extend the flow path of the water. The supporting column (223) is used to support the top impact plate (222) and the landscape stacked stones (221). The landscape stacked stones (221) are used to provide a landscape.

2. The system of claim 1, wherein, The initial rainwater interception unit (21) consists of a rainwater pipe outlet dam (211), a rainwater pipe (212), a flushing pipe (213), and a flushing control valve (214); The rainwater pipe outlet pier (211) is made of reinforced concrete to resist the impact and vibration of high-speed water flow; The rainwater pipe (212) is used to receive initial rainwater in mountainous areas; The flushing pipe (213) connects the multi-stage extended diameter purification unit (23) and the rainwater pipe (212). The flushing control valve (214) is used to control the water flow in the flushing pipe (213); by controlling the water in the flushing pipe (213), the sediment in the rainwater pipe (212) is cleaned regularly, and the multi-stage extended diameter purification unit (23) is maintained for siltation.

3. The system of claim 1, wherein, The high-strength wear-resistant and impact-resistant stainless steel plate (224) is made of high-strength stainless steel; the corrugated multi-stage elongated weathering steel plate (225) is made of weathering steel and designed as a corrugated structure.

4. The system of claim 1, wherein, The multi-stage extended diameter purification unit (23) consists of a gravel interception layer (231), a zeolite adsorption purification layer (232), and an emergent plant layer (233). The gravel trapping layer (231) is located at the front end of the multi-stage extended diameter purification unit (23) and is used to trap large suspended particles in the water. The zeolite adsorption purification layer (232) is located after the gravel interception layer (231) and is used to filter fine particles in the water and adsorb dissolved pollutants. The emergent plant layer (233) is planted on the surface of the multi-level extended diameter purification unit (23) to deepen purification through the root system of the emergent plants and provide a landscape.

5. The system of claim 1, wherein, The elevated landscape water storage and overflow unit (24) consists of a circular water storage base (241), a pebble ecological finish (242), a silt drain pipe (243), a silt drain control valve (244), and an elevated landscape support pier (245). The circular water storage substrate (241) is used to provide a purification container and hydraulic conditions for the multi-stage extended diameter purification unit (23); The pebble ecological finish (242) is used to enhance structural durability and landscape integration; The sludge discharge pipe (243) is connected to the circular water storage substrate (241) and works in conjunction with the sludge discharge control valve (244) to clean and maintain the sediment in the circular water storage substrate (241); The elevated landscape support pier (245) provides structural support for the elevated landscape water storage overflow unit (24) and provides visual landscape.

6. The system of claim 1, wherein, The ecological retention deep purification module (3) includes an aquatic plant layer (31) and a submerged plant layer (32); the roots of the plants in the aquatic plant layer (31) and the submerged plant layer (32) slow down the flow of water and prolong the retention of water.

7. The system of claim 1, wherein, The clean water reuse module (4) includes: an inlet pipe (41), a reuse well (42), a reuse pump (43), a butterfly valve well (44), a butterfly valve (45), and an outlet pipe (46). The inlet pipe (41) is used to guide the purified water into the reuse well (42). The purified water in the reuse well (42) is pumped into the butterfly valve well (44) after being lifted by the reuse pump (43), and then enters the outlet pipe (46) through the butterfly valve (45). The outlet pipe (46) is used to transport the purified water to each water point.

8. The system of claim 7, wherein, The water usage points include at least: greening irrigation water points, landscape water replenishment water points, and road sweeping water points.

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