Storage and drainage dual-mode tunnel system for cooperatively solving non-point source pollution control and urban inland inundation

Abstract

The invention discloses a storage and drainage dual-mode tunnel system for cooperatively solving non-point source pollution control and urban inland inundation, which comprises a control system, a monitoring system, a drainage tunnel main body and the like, wherein the drainage tunnel main body is divided into a plurality of galleries along the drainage direction; the drainage tunnel body is provided with a rainwater / sewage treatment facility water inlet and outlet pipeline system and an initial polluted rainwater intercepting pipe system in a matched mode. The drainage tunnel is divided into the multiple galleries and provided with the intelligent control system, and the'storage 'and'drainage' states of all the galleries can be regulated and controlled in a graded mode according to the rainfall intensity; in light rain, the tunnel is closed to regulate and store initial polluted rainwater; the regulation and storage and flood discharge proportion is dynamically allocated in moderate rain; flood discharge is preferentially carried out in heavy rain, and residual capacity is used for regulation and storage; and when the standard is exceeded, full-channel flood discharge is carried out. The system effectively solves the problems that a traditional drainage tunnel is single in function, high in land resource occupancy rate and insufficient in non-point source pollution control, and collaborative optimization of function superposition, land saving and double targets of pollution control and flood control and drainage is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water pollution control and flood control and drainage, and particularly relates to a storage and drainage dual-mode tunnel system for controlling non-point source pollution and cooperatively solving urban waterlogging. BACKGROUND

[0002] With the acceleration of urbanization, the hardening rate of urban land surface is significantly improved, leading to a sharp increase in rainwater runoff. The drainage and flood control of urban built-up area rivers and creeks are facing severe challenges. In rainy weather, rivers and creeks in high-density urban built-up areas are prone to urban waterlogging due to poor drainage, which seriously affects the life of citizens and urban safety. Under the requirement of resilient city construction, the construction standard of urban flood control and drainage system is getting higher and higher, and most of the existing rivers are limited by surrounding urban construction, and it is difficult to achieve river widening in most cases, which limits the improvement of river drainage capacity. By constructing drainage tunnels, the drainage capacity of the existing rivers can be supplemented, thereby achieving the purpose of flood control and drainage. However, the drainage tunnel has the problems of high construction cost and low utilization frequency. At the same time, with the continuous improvement of urban river water quality, non-point source pollution control has become a key link to maintain the stability of river water quality. Among various treatment methods, temporary storage and treatment of initial pollution rainwater by constructing storage tanks is an effective technical path to control non-point source pollution. However, such storage facilities have significant shortcomings: not only do they occupy a large area, but also the construction cost is relatively high. This problem is particularly prominent in high-density built-up areas - due to the extreme shortage of land resources, the sharp land use conflict directly leads to the actual landing of the initial rainwater storage tank to face many obstacles.

[0003] The traditional drainage tunnel mainly has the following defects: in terms of facility utilization, the traditional drainage tunnel has a single function, and the tunnel is idle during small and medium rain, and the river can meet the demand of flood control and drainage as a drainage passage, and the drainage tunnel cannot fully play the role of initial pollution rainwater storage and has a high idle rate; in terms of pollution control, the traditional drainage tunnel only discharges flood without storage or the construction of storage tanks is blocked, so that the initial pollution rainwater (containing a large amount of pollutants) is directly discharged into the water body, causing deterioration of river water quality; in terms of system regulation, there is no grading response mechanism for different rainfall intensities, and the strategy of "storage" and "discharge" cannot be dynamically adjusted according to the change of rainfall, so the actual effect is greatly reduced.

[0004] The core contradiction of the current technical system is that on the one hand, it needs to cope with the flood control and drainage pressure brought by rainfall (especially in extreme weather conditions), and on the other hand, it needs to solve the problem of construction of storage facilities under the constraint of land resources. Therefore, the development of drainage systems for controlling non-point source pollution of urban rivers and improving flood control and drainage capacity has become an important research direction in the field of water pollution control and flood control and drainage. SUMMARY

[0005] In view of this, the purpose of the present application is to provide a kind of face source pollution control and urban waterlogging collaborative solution's storage and discharge dual-mode tunnel system to solve the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the present application is realized by the following technical scheme:

[0007] A kind of face source pollution control and urban waterlogging collaborative solution's storage and discharge dual-mode tunnel system is provided, including rainwater sewage treatment facilities, initial pollution rainwater interception pipe system, control system, monitoring system and drainage tunnel main body separated into several corridors along drainage direction, adjacent The corridor is separated by partition, the import end, export end of each corridor is provided with gate respectively, and the export end of each corridor is configured with lifting pump, the monitoring system includes sensing device, the sensing device is connected with the gate and the lifting pump and is used to monitor rainfall intensity, river water level, tunnel water level and initial pollution rainwater interception standard related parameters, the control system is signal connected with the sensing device and realizes hierarchical control by controlling the opening and closing of the gate and the lifting pump.

[0008] As the face source pollution control and urban waterlogging collaborative solution's storage and discharge dual-mode tunnel system, hierarchical control includes: when light rain, drainage tunnel is used as closed space to store initial pollution rainwater, when moderate rain, the proportion of initial pollution rainwater storage and excess runoff flood discharge is dynamically adjusted, when heavy rain, flood discharge function is preferentially guaranteed, and the remaining corridor space continues to store part of initial pollution rainwater, when rainfall exceeds design standard, all corridors are opened to meet the maximum flood discharge demand.

[0009] As the face source pollution control and urban waterlogging collaborative solution's storage and discharge dual-mode tunnel system, the drainage tunnel main body includes corridor A, corridor B and corridor C;

[0010] Under light rain condition, when initial pollution rainwater interception system is stored, close all corridor import end, export end gate, preferentially make initial pollution rainwater enter corridor A and store;After corridor A is full, subsequent corridors are sequentially enabled until initial pollution rainwater within design interception standard is all stored;If initial pollution rainwater stored in river is heavy, only import end gate of corridor A should be opened, and all export end gates of corridors should be closed;After corridor A is full, its import end gate is closed, and subsequent corridors are sequentially enabled until all initial pollution rainwater within design interception standard is stored;

[0011] Under moderate rain conditions, drainage is prioritized through the river's own discharge capacity. When the river flow exceeds the river's drainage capacity, the gates at the inlet and outlet ends of the corridor that have not been regulated for initial polluted rainwater are opened as auxiliary flood discharge channels. If the river flow continues to increase, the regulated initial polluted rainwater is prioritized for pumping to treatment facilities. Secondly, the gates at the inlet and outlet ends of the regulated corridor are opened directly to convert it into a flood discharge channel until the river's discharge demand during moderate rain is met.

[0012] Under heavy rain conditions, in accordance with the urban flood control and drainage requirements under the design standards, priority should be given to using drainage tunnels and corridors as flood discharge channels to ensure flood control and drainage of rivers; if there is still completely unused corridor space in the drainage tunnels, then some of the initial polluted rainwater will continue to be stored.

[0013] When rainfall exceeds the design standard, the gates at the inlet and outlet of all corridors will be opened, and all corridors of the drainage tunnel will be used as flood discharge channels to meet the maximum flood discharge demand of the river.

[0014] The dual-mode tunnel system for coordinating non-point source pollution control and urban flooding is described above. The control system includes a command and control center, and the sensing devices include a rainfall sensor, a river water level sensor, a tunnel water level sensor, and an input module for obtaining standard parameters for initial polluted rainwater interception.

[0015] The dual-mode tunnel system for coordinating non-point source pollution control and urban flooding is described above. The monitoring system further includes an upstream automatic monitoring system, a midstream automatic monitoring system, a downstream automatic monitoring system, an urban rainfall monitoring system, an automatic monitoring system for the initial pollution stormwater interception pipe system, and automatic monitoring instruments configured within the corridor.

[0016] The dual-mode tunnel system for coordinating non-point source pollution control and urban flooding is described above, wherein the main body of the drainage tunnel utilizes the renovation of existing drainage tunnels in urban waterways or adopts a newly constructed intensive drainage tunnel structure.

[0017] The beneficial effects of the technical solution of this invention are:

[0018] By dividing the drainage tunnel into multiple corridors and configuring an intelligent control system, the "storage" and "discharge" status of each corridor can be adjusted according to the rainfall intensity: during light rain, the tunnel is closed to store initial polluted rainwater; during moderate rain, the ratio of storage to flood discharge is dynamically allocated; during heavy rain, flood discharge is prioritized and the remaining capacity is used for storage; and when rainfall exceeds the standard, all channels are used for flood discharge. This system effectively solves the problems of traditional drainage tunnels, such as single function, high land resource occupation, and insufficient control of non-point source pollution, and achieves synergistic optimization of functional superposition, land saving, and the dual objectives of pollution control and flood prevention and drainage. Attached Figure Description

[0019] To further illustrate the above-mentioned objectives, structural features, and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram illustrating the system application of a preferred embodiment of the present invention;

[0021] In the diagram: 1-Upper reaches of urban river, 2-Middle reaches of urban river, 3-Lower reaches of urban river, 4-Drainage tunnel, 5-Urban built-up area, 6-Stormwater / sewage treatment facilities, 7-Drainage system command and control center, 8-Initial pollution stormwater interception pipe system, 401-Corridor A, 402-Corridor B, 403-Corridor C, 101-Inlet gate of Corridor A, 102-Inlet gate of Corridor B, 103-Inlet gate of Corridor C, 104-Communication line between the inlet gate of Corridor A and the control center, 105-Communication line between the inlet gate of Corridor B and the control center, 106-Communication line between the inlet gate of Corridor C and the control center, 107-Automatic monitoring instrument of Corridor A. Table 108 - Automatic monitoring instruments for Corridor B; 109 - Automatic monitoring instruments for Corridor C; 110 - Communication lines between automatic monitoring instruments and the control center for Corridor A; 111 - Communication lines between automatic monitoring instruments and the control center for Corridor B; 112 - Communication lines between automatic monitoring instruments and the control center for Corridor C; 113 - Initial pollution rainwater booster pump for Corridor A; 114 - Initial pollution rainwater booster pump for Corridor B; 115 - Initial pollution rainwater booster pump for Corridor C; 116 - Communication lines between initial pollution rainwater booster pump and the control center for Corridor A; 117 - Communication lines between initial pollution rainwater booster pump and the control center for Corridor B; 118 - Initial pollution rainwater booster pump for Corridor C... Communication lines between the polluted rainwater lift pump and the control center; 119 - Corridor A outlet gate; 120 - Corridor B outlet gate; 121 - Corridor C outlet gate; 122 - Communication lines between the corridor A outlet gate and the control center; 123 - Communication lines between the corridor B outlet gate and the control center; 124 - Communication lines between the corridor C outlet gate and the control center; 125 - Rainwater / sewage treatment facility inlet pipeline system; 126 - Rainwater / sewage treatment facility outlet pipeline system; 127 - Communication lines between the rainwater / sewage treatment facility and the control center; 201 - Upstream automatic monitoring system; 202 - Midstream automatic monitoring system; 203 - Downstream automatic monitoring system. 204 - Communication line between upstream monitoring system and control center; 205 - Communication line between midstream monitoring system and control center; 206 - Communication line between downstream monitoring system and control center; 207 - Urban rainfall monitoring system; 208 - Communication line between urban rainfall monitoring system and control center; 209 - Automatic monitoring system for initial polluted rainwater interception pipe system; 210 - Communication line between monitoring system and control center for initial polluted rainwater interception pipe system; 211 - Communication line between terminal control gate / valve group of initial polluted rainwater interception pipe system; 212 - Communication line between terminal control gate / valve group of initial polluted rainwater interception pipe system and control center. Detailed Implementation

[0022] The terms “invention” and “the present invention” used in this specification are intended to broadly refer to all subject matter of this specification and any of the following patent claims. Statements containing these terms should not be construed as limiting the subject matter described herein or limiting the meaning or scope of any of the following patent claims. Furthermore, this specification does not attempt to describe or limit the subject matter covered by any claim of any particular component, paragraph, statement, or drawing of this application. The subject matter should be understood with reference to the entire specification, all drawings, and any of the following claims. The invention may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the wording and terminology used herein are for illustrative purposes and should not be considered limiting.

[0023] The details of the invention will now be discussed with reference to the accompanying drawings, which are illustrated by way of example only. In the drawings, similar features or components may be labeled using the same reference numerals.

[0024] The use of the terms "comprising," "having," and "including," and variations thereof, herein means to include the items listed herein and their equivalents and additional items. While reference may be made in the description of the drawings to directions such as above, below, upward, downward, backward, bottom, top, front, rear, etc., for convenience, reference is made relative to the drawings. These directions are not intended to literally accept or limit the invention in any form. Furthermore, terms such as "first," "second," "third," etc., are used herein for illustrative purposes and are not intended to indicate or imply importance or significance.

[0025] Explanation of rainfall level terminology: When terms such as "light rain", "moderate rain", and "heavy rain" are used, the rainfall level indicated is based on the definition of this patent and is only for the convenience of describing the present invention and simplifying the expression. It does not indicate or imply the quantity or scale of a specific standard. In actual implementation, it can be adjusted according to the specific circumstances and does not constitute a limitation on the present invention.

[0026] See Figure 1 As shown, the present invention provides a dual-mode tunnel system for the coordinated solution of non-point source pollution control and urban flooding, including a drainage tunnel 4, rainwater / sewage treatment facilities 6, a drainage system command and control center 7, and an initial pollution rainwater interception pipe system 8.

[0027] The drainage tunnel 4 includes three sections: A 401, B 402, and C 403. The number of sections (not limited to three) and their size distribution (equal or unequal division) can be adjusted according to actual needs. Gates are installed at the inlet of drainage tunnel 4: gate 101 for section A, gate 102 for section B, and gate 103 for section C, to control the water storage and drainage status of each section. Each gate is connected to the drainage system command and control center 7 via dedicated communication lines (104 - communication line between gate A and the control center; 105 - communication line between gate B and the control center; 106 - communication line between gate C and the control center) for centralized control.

[0028] Automatic monitoring instrument configuration for the drainage tunnels: Automatic monitoring instruments are installed in each tunnel of drainage tunnel 4. Automatic monitoring instruments (liquid level, AR, etc.) are installed in tunnel A (Automatic Monitoring Instrument 107 for Tunnel A), tunnel B (Automatic Monitoring Instrument 108 for Tunnel B), and tunnel C (Automatic Monitoring Instrument 109 for Tunnel C) to monitor parameters such as liquid level and operating status within the tunnels. Monitoring data is transmitted to the drainage system command and control center 7 via dedicated communication lines (communication line 110 between the automatic monitoring instruments in tunnel A and the control center, communication line 111 between the automatic monitoring instruments in tunnel B and the control center, and communication line 112 between the automatic monitoring instruments in tunnel C and the control center).

[0029] Initial polluted rainwater pump configuration at the outlet: Initial polluted rainwater pumps are installed at the outlet of drainage tunnel 4, namely, initial polluted rainwater pump 113 in corridor A, initial polluted rainwater pump 114 in corridor B, and initial polluted rainwater pump 115 in corridor C. These pumps are used to transport the stored initial polluted rainwater to the rainwater / sewage treatment facility 6 through the rainwater / sewage treatment facility inlet pipeline system 125. Each initial polluted rainwater pump is connected to the drainage system command and control center 7 via dedicated communication lines (communication line 116 between the initial polluted rainwater pump of corridor A and the control center, communication line 117 between the initial polluted rainwater pump of corridor B and the control center, and communication line 118 between the initial polluted rainwater pump of corridor C and the control center) to achieve remote control.

[0030] Outlet gate configuration: Outlet gates are installed at the outlet ends of drainage tunnel 4, namely outlet gate 119 for corridor A, outlet gate 120 for corridor B, and outlet gate 121 for corridor C, to control the water storage and drainage status of each corridor. Each gate is connected to the drainage system command and control center 7 via dedicated communication lines (communication line 122 between outlet gate A and the control center, communication line 123 between outlet gate B and the control center, and communication line 124 between outlet gate C and the control center) to achieve remote control.

[0031] Water inlet and outlet pipeline system: Drainage tunnel 4 is equipped with a rainwater / sewage treatment facility inlet pipeline system 125. This pipeline system is connected to the outlet end of the initial polluted rainwater lifting pumps of each corridor (initial polluted rainwater lifting pump 113 of corridor A, initial polluted rainwater lifting pump 114 of corridor B, and initial polluted rainwater lifting pump 115 of corridor C), which transports the initial polluted rainwater to the rainwater / sewage treatment facility 6 for treatment and pollutant reduction. After reaching the standard, it is discharged into the water body through the rainwater / sewage treatment facility outlet pipeline system 126.

[0032] Automatic River Monitoring System: Drainage tunnel 4 is equipped with an upstream automatic monitoring system 201 (water quality, water level, etc.), a midstream automatic monitoring system 202 (water quality, water level, etc.), and a downstream automatic monitoring system 203 (water quality, water level, etc.) in the upstream, midstream, and downstream sections of the urban river, respectively. These systems are used to monitor water quality, water level, and other data of the urban river. The monitoring results are transmitted to the drainage system command and control center 7 via dedicated communication lines (upstream monitoring system communication line 204, midstream monitoring system communication line 205, and downstream monitoring system communication line 206).

[0033] Urban Rainfall Monitoring System: Urban rainfall monitoring system 207 (single or multiple locations) is installed in typical areas of the drainage tunnel area in the urban built-up area 5 to monitor rainfall data in the area where the drainage tunnel is located. The data is transmitted to the drainage system command and control center 7 through the communication line 208 between the urban rainfall monitoring system and the control center.

[0034] Monitoring and control of the initial polluted rainwater interception pipe system: An automatic monitoring system 209 (water quality, water level, etc.) for the initial polluted rainwater interception pipe system 8 is installed at important nodes in the drainage tunnel 4. This system is used to monitor the water quality and quantity of the intercepted initial polluted rainwater and transmits the data to the drainage system command and control center 7 through the initial polluted rainwater interception pipe system monitoring system communication line 210. At the same time, a control gate / valve group (initial polluted rainwater interception pipe system end control gate / valve group 211) is installed at the end of the initial polluted rainwater interception pipe system 8 to control the delivery of the intercepted initial polluted rainwater to the drainage tunnel for storage. This control gate / valve group communicates with the drainage system command and control center 7 through the control center communication line (initial polluted rainwater interception pipe system end control gate / valve group and control center communication line 212).

[0035] Drainage System Command and Control Center: The drainage system command and control center 7 serves as the centralized control hub for the entire system. It communicates with the rainwater / sewage treatment facility 6 via the control center communication line (rainwater / sewage treatment facility and control center communication line 127). Simultaneously, it connects to and controls the following components via the aforementioned communication lines: drainage tunnel inlet gates (gate 101 for tunnel A, gate 102 for tunnel B, and gate 103 for tunnel C), drainage tunnel automatic monitoring instruments (automatic monitoring instrument 107 for tunnel A, automatic monitoring instrument 108 for tunnel B, and automatic monitoring instrument 109 for tunnel C), and initial pollution rainwater lift pumps for the drainage tunnel (tunnel). The system is interconnected and controlled by the following components: the initial pollution rainwater lift pump 113 of corridor A, the initial pollution rainwater lift pump 114 of corridor B, the initial pollution rainwater lift pump 115 of corridor C, the drainage tunnel corridor outlet gates (exit gate 119 of corridor A, outlet gate 120 of corridor B, outlet gate 121 of corridor C), the river water quality and level automatic monitoring system (upstream automatic monitoring system 201 of river, midstream automatic monitoring system 202 of river, downstream automatic monitoring system 203 of river), the urban rainfall monitoring system 207, the initial pollution rainwater interception pipe system water quality and level automatic monitoring system 209, and the initial pollution rainwater interception pipe system end control gate / valve group 211, so as to realize the overall system scheduling.

[0036] Explanation of preferred embodiments:

[0037] ① When the urban rainfall monitoring system 207 detects light rain and meets the following conditions: all / part of the drainage tunnel 4 is empty (confirmed by the automatic monitoring instrument 107 of the corridor, the automatic monitoring instrument 108 of the corridor B, and the automatic monitoring instrument 109 of the corridor C), and there is initial polluted rainwater that needs to be stored in the initial polluted rainwater interception pipe system 8 (monitored by the initial polluted rainwater interception pipe system automatic monitoring system 209).

[0038] Storage and regulation phase: The drainage system command and control center 7 issues an instruction to first close the inlet and outlet gates of corridor A 401 in drainage tunnel 4 (corridor A inlet gate 101, corridor A outlet gate 119), and open the gates / valve of corridor A 401 at the end of the initial polluted rainwater interception pipe system (initial polluted rainwater interception pipe system end control gate / valve group 211), transporting the polluted rainwater intercepted by the initial polluted rainwater interception pipe system 8 to corridor A 401 for storage and regulation, until all the initial polluted rainwater within the design interception standard is stored in the empty corridor of drainage tunnel 4. This fully utilizes the storage and regulation capacity of drainage tunnel 4 to achieve the storage and regulation of initial polluted rainwater containing a large amount of non-point source pollutants.

[0039] Post-rainfall treatment: After the light rain ends, when the drainage system command and control center 7 detects that the rainwater / sewage treatment facility 6 has the capacity to treat the initial polluted rainwater stored in the drainage tunnel 4, the initial polluted rainwater lift pump (initial polluted rainwater lift pump 113 in corridor A 401) in the drainage tunnel is first activated. The initial polluted rainwater is transported to the rainwater / sewage treatment facility 6 through the rainwater / sewage treatment facility inlet pipeline system 125. After emptying, the initial polluted rainwater lift pump (initial polluted rainwater lift pump 113 in corridor A) is shut off. The treated effluent from the rainwater / sewage treatment facility 6 is discharged into the water body through the rainwater / sewage treatment facility outlet pipeline system 126, thereby reducing pollutants in the stored initial polluted rainwater, reducing pollutants entering the river, and improving the river water quality.

[0040] Technical advantages: Drainage tunnel 4 does not need to be used as a flood discharge channel, making full use of its idle space to store initial polluted rainwater, thus avoiding the land occupation and increased investment problems of traditional storage ponds. In practical applications, the number and functional allocation of corridors can be adjusted according to needs (e.g., corridor B 402 of drainage tunnel 4 can also be used as storage space).

[0041] ② When the urban rainfall monitoring system 207 detects moderate rain, and the aforementioned conditions for idling and interception of light rain are met:

[0042] Storage and regulation phase: Similar to light rain conditions, priority will be given to using corridor A 401 to store initial polluted rainwater.

[0043] During the flood discharge coordination phase: The drainage system command and control center 7 receives real-time data feedback from the upstream automatic monitoring system 201 (water quality, water level, etc.), the midstream automatic monitoring system 202 (water quality, water level, etc.), and the downstream automatic monitoring system 203 (water quality, water level, etc.). When the river water level exceeds the natural discharge capacity, the drainage system command and control center 7 opens the inlet and outlet gates of corridor C403 (corridor C inlet gate 103 and corridor C outlet gate 121) as a supplementary flood discharge channel. When the river water level continues to rise, the inlet and outlet gates of corridor B402 (corridor B inlet gate 102 and corridor B outlet gate 120) are further opened. It is worth noting that in this embodiment, only the space of drainage tunnel 4 corridor A 401 is used as the storage space for initial polluted rainwater, and corridors B 402 and C 403 are used as flood discharge channels during moderate rain. In actual implementation, the number and functional allocation of corridors can be adjusted according to actual needs, prioritizing the coordinated realization of storage and flood discharge functions, and ensuring the safety of river flood discharge is the primary goal in case of conflict.

[0044] Post-rainwater treatment: Similar to the light rain condition, start the initial polluted rainwater lift pump (initial polluted rainwater lift pump 113 in corridor A 401) to transport the initial polluted rainwater to the rainwater / sewage treatment facility 6 through the rainwater / sewage treatment facility inlet pipeline system 125. After emptying, shut down the initial polluted rainwater lift pump (initial polluted rainwater lift pump 113 in corridor A). The treated effluent from the rainwater / sewage treatment facility 6, meeting the standards, is discharged into the water body through the rainwater / sewage treatment facility outlet pipeline system 126, thereby reducing pollutants in the initial polluted rainwater, decreasing pollutants entering the river, and improving the river water quality. Corridors B402 and C403 are returned to an empty state.

[0045] Technical advantages: By dynamically allocating corridor functions, the "storage" and "drainage" are coordinated, giving full play to the space utilization efficiency of the tunnel.

[0046] ③ When the city's rainfall monitoring system 207 detects heavy rain or above:

[0047] Priority flood discharge: The drainage system command and control center 7 ensures that all corridors of drainage tunnel 4 are empty (confirmed by the automatic monitoring instruments of the corridors (automatic monitoring instrument 107 for corridor A, automatic monitoring instrument 108 for corridor B, and automatic monitoring instrument 109 for corridor C)). Based on the data feedback from the upstream automatic monitoring system 201 (water quality, water level, etc.), the midstream automatic monitoring system 202 (water quality, water level, etc.), and the downstream automatic monitoring system 203 (water quality, water level, etc.), the inlet and outlet gates of corridor C 403 (inlet gate 103 and outlet gate 121) and the inlet and outlet gates of corridor B 402 (inlet gate 102 and outlet gate 120) are opened sequentially until all corridors of drainage tunnel 4 are opened to meet the flood discharge needs of the river. In actual implementation, the number and functional allocation of corridors can be adjusted according to actual needs. For example, if corridor A 401 has already stored initial polluted rainwater, corridors B 402 and C 403 should be used first for flood discharge to meet both storage and flood discharge functions as much as possible. However, when conditions are limited, the initial polluted rainwater stored in corridor A 401 can be transported to rainwater / sewage treatment facility 6. If it cannot be treated in time, it can be discharged directly to meet the flood discharge needs of the river and ensure the safety of the river.

[0048] Technical advantages: It ensures maximum flood discharge capacity during extreme rainfall, while also taking into account emergency handling of rainwater storage, prioritizing urban flood control safety. Simultaneously, it utilizes the flood discharge flow to hydraulically flush the corridors, and if necessary, sets longitudinal slopes along the water flow direction to prevent siltation and blockage, thus maintaining the corridors to a certain extent.

[0049] ④ When the area does not have an initial pollution stormwater interception pipe system 8, it is possible to directly intercept the river water containing more non-point source pollution formed by the initial runoff in the river channel during the rainfall, and then discharge it after treatment by the stormwater / sewage treatment facility 6, so as to achieve pollutant reduction and river water quality improvement.

[0050] ⑤ To prevent the sediment and pollutants already deposited at the bottom of the drainage tunnel 4 from re-entering the river water due to hydraulic flushing when storing initial polluted rainwater or river water containing non-point source pollution, the initial polluted rainwater lifting pumps of each drainage tunnel corridor (initial polluted rainwater lifting pump 113 of corridor A, initial polluted rainwater lifting pump 114 of corridor B, and initial polluted rainwater lifting pump 115 of corridor C) should preferentially select pumps with stirring functions, or, provided that flood discharge is not affected, consider installing stirring devices or hydraulic flushing devices in the corridors to ensure that the intercepted pollutants enter the rainwater / sewage treatment facilities 6 to reduce the total amount of pollution.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-mode tunnel system for synergistic control of non-point source pollution and urban flooding, characterized in that, The system includes a control system, a monitoring system, and a main body of a drainage tunnel divided into several corridors along the drainage direction. Adjacent corridors are separated by partition walls. The main body of the drainage tunnel is equipped with an inlet and outlet pipeline system for rainwater and sewage treatment facilities and an initial polluted rainwater interception pipe system. Each corridor is equipped with a gate at its inlet and outlet, and a booster pump at its outlet. The monitoring system includes sensing devices connected to the gates and the booster pumps to monitor rainfall intensity, river water level, tunnel water level, and relevant parameters of the initial polluted rainwater interception standard. The control system is connected to the sensing devices and achieves graded regulation by controlling the opening and closing of the gates and the booster pumps.

2. The dual-mode tunnel system for synergistic solution of non-point source pollution control and urban flooding as described in claim 1, characterized in that, The tiered control measures include: during light rain, the drainage tunnels will be used as closed spaces to store initial polluted rainwater; during moderate rain, the ratio of initial polluted rainwater storage to excess runoff discharge will be dynamically adjusted; during heavy rain, the discharge function will be prioritized, and the remaining corridor space will continue to store some initial polluted rainwater; when the rainfall exceeds the design standard, all corridors will be opened to meet the maximum discharge demand.

3. The dual-mode tunnel system for synergistic solution of non-point source pollution control and urban flooding as described in claim 2, characterized in that, The main body of the drainage tunnel includes corridor A, corridor B and corridor C; Under light rain conditions, when regulating the intercepted water of the initial polluted rainwater interception system, close all inlet and outlet gates of the corridors, and prioritize allowing the initial polluted rainwater to enter the corridor A for regulation; after the corridor A is full, the subsequent corridors are activated in sequence until all the initial polluted rainwater within the design interception standard is regulated; if the initial non-point source pollution of the intercepted water in the regulation channel is relatively heavy, only the inlet gate of corridor A should be opened, while all outlet gates of the corridors should be closed at the same time; after the corridor A is full, close its inlet gate, and then activate the subsequent corridors in sequence until all the intercepted water within the design interception standard is regulated. Under moderate rain conditions, drainage is prioritized through the river's own discharge capacity. When the river flow exceeds the river's drainage capacity, the gates at the inlet and outlet ends of the corridor that have not been regulated for initial polluted rainwater are opened as auxiliary flood discharge channels. If the river flow continues to increase, the regulated initial polluted rainwater is prioritized for pumping to treatment facilities. Secondly, the gates at the inlet and outlet ends of the regulated corridor are opened directly to convert it into a flood discharge channel until the river's discharge demand during moderate rain is met. Under heavy rain conditions, in accordance with the urban flood control and drainage requirements under the design standards, priority should be given to using drainage tunnels and corridors as flood discharge channels to ensure flood control and drainage of rivers; if there is still completely unused corridor space in the drainage tunnels, then some of the initial polluted rainwater will continue to be stored. When rainfall exceeds the design standard, the gates at the inlet and outlet of all corridors will be opened, and all corridors of the drainage tunnel will be used as flood discharge channels to meet the maximum flood discharge demand of the river.

4. The dual-mode tunnel system for synergistic solution of non-point source pollution control and urban flooding as described in claim 1, characterized in that, The control system includes a command and control center, and the sensing devices include a rainfall sensor, a river water level sensor, a tunnel water level sensor, and an input module for obtaining standard parameters for initial polluted rainwater interception.

5. The dual-mode tunnel system for synergistic solution of non-point source pollution control and urban flooding as described in claim 4, characterized in that, The monitoring system also includes an upstream automatic monitoring system, a midstream automatic monitoring system, a downstream automatic monitoring system, an urban rainfall monitoring system, an automatic monitoring system for the initial pollution stormwater interception pipe system, and automatic monitoring instruments configured in each of the corridors.

6. The dual-mode tunnel system for synergistic solution of non-point source pollution control and urban flooding as described in claim 1, characterized in that, The main body of the drainage tunnel is achieved by modifying existing drainage tunnels in urban waterways or by constructing a new, intensive drainage tunnel structure.

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