Passenger water rainwater pollution control facility

Abstract

The utility model discloses a guest water and rainwater pollution control facility, which belongs to the technical field of water ecological management and comprises an energy dissipation sedimentation tank and a percolation ditch. The energy dissipation sedimentation tank is used for carrying out energy dissipation and filtering pretreatment on peripheral guest water and rainwater; the percolation ditch is communicated with the energy dissipation sedimentation tank through the communication pipeline, guest water and rainwater pretreated by the energy dissipation sedimentation tank can be collected by the perforated collection pipe buried in the percolation ditch to a downstream rainwater recycling facility to be recycled, and can be subjected to infiltration purification in the percolation ditch to supplement underground water. And the water which is not infiltrated in time can overflow into a downstream rainwater recycling facility along the slope of the surface of the infiltration ditch. According to the guest water and rainwater pollution control facility, the problems of runoff pollution and water accumulation caused by the fact that peripheral guest water and rainwater in many areas cannot be well controlled are solved, the guest water and rainwater pollution control facility can be well matched with other rainwater recycling facilities, the application range is wide, and the rainwater treatment process meets the requirements of green ecological facilities.

Description

Technical Field

[0001] The utility model belongs to the technical field of water ecological management, and specifically relates to a guest water and rainwater pollution control facility. Background Art

[0002] Guest water, also known as guest rainwater, refers to rainwater from outside the region, that is, it is not precipitation generated in the region, but is formed by natural processes such as rainfall or snowmelt in other regions, flowing into the region through rivers, channels, ground, etc. In many areas, if the guest water from the periphery is not controlled, it will lead to runoff pollution and waterlogging in the area.

[0003] At present, rainwater collection and purification projects in cities often use traditional "grey" facilities such as pipes and pumping stations to collect and discharge rainwater, which easily leads to waste and pollution of rainwater resources. When heavy rains occur, a large amount of rainwater runoff and pollutants carried are transported to the end of the pipes in a short period of time, resulting in an increased risk of waterlogging in the area. Moreover, the functions of existing guest water and rainwater control facilities are relatively simple, and most of them only have the function of collecting and discharging rainwater and guest water, which cannot meet the requirements of green ecological facilities. Utility Model Content

[0004] In view of this, the utility model provides a guest water and rainwater pollution control facility, which solves the problems of runoff pollution and water accumulation caused by the inability to well control the peripheral guest water and rainwater.

[0005] The utility model adopts the following technical solutions:

[0006] A guest water and rainwater pollution control facility, including an energy dissipation sedimentation tank and a percolation ditch;

[0007] The energy dissipation sedimentation tank is used to dissipate energy and filter pre-process the peripheral guest water and rainwater;

[0008] The infiltration ditch is connected to the energy dissipation sedimentation tank through a connecting pipe. The guest rainwater pre-treated in the energy dissipation sedimentation tank can be collected by the perforated collection pipe buried in the infiltration ditch to the downstream rainwater reuse facility for reuse, and can infiltrate and purify in the infiltration ditch to replenish groundwater. The water that does not have time to infiltrate can overflow along the slope of the infiltration ditch surface into the downstream rainwater reuse facility.

[0009] Furthermore, the energy dissipation sedimentation tank is arranged in a low-lying area, and a rainwater grate is provided on the top of the energy dissipation sedimentation tank;

[0010] The paved surface of the low-lying land is provided with a slope inclined toward the rainwater grate, which is used to collect the guest rainwater of the peripheral runoff. The guest rainwater of the periphery can fall into the energy dissipation sedimentation tank through the rainwater grate after being collected by the low-lying land.

[0011] Furthermore, a trash screen is provided above the energy dissipation sedimentation tank, and a sediment and sand settling area is provided at the bottom of the energy dissipation sedimentation tank. The rainwater falling into the energy dissipation sedimentation tank through the rainwater grate first falls onto the trash screen and then into the sediment and sand settling area;

[0012] When the rainwater in the energy dissipation sedimentation tank overflows the connecting pipe, the rainwater in the energy dissipation sedimentation tank flows into the infiltration trench through the connecting pipe.

[0013] Furthermore, the infiltration trench is provided with a slope inclined towards the downstream rainwater reuse facility, and the infiltration trench is provided with a replacement soil layer. Green plants are planted on the replacement soil layer, and a gravel layer is laid on the replacement soil layer. Rainwater can infiltrate downwards along the gravel layer to the replacement soil layer;

[0014] The perforated collection pipe is buried in the replacement soil layer, and one end of the perforated collection pipe buried in the replacement soil layer is in a blocked state.

[0015] Furthermore, a side geotextile is provided on one side of the infiltration trench close to the energy dissipation sedimentation tank, a bottom geotextile is provided below the replacement soil layer at the bottom of the infiltration trench, and a top geotextile is provided below the gravel layer at the top of the infiltration trench.

[0016] Furthermore, a water distribution weir is further included;

[0017] The water distribution weir is arranged at one end of the connecting pipe close to the infiltration trench. The rainwater in the energy dissipation sedimentation tank flows into the water distribution weir through the connecting pipe and then is distributed by the water distribution weir and flows into the infiltration trench.

[0018] Furthermore, the longitudinal section of the infiltration trench is trapezoidal, and the upper base of the trapezoid is larger than the lower base.

[0019] Furthermore, a dike is provided between the infiltration trench and the energy dissipation sedimentation tank, and the connecting pipe is arranged below the dike.

[0020] Furthermore, a fence is provided on the dike.

[0021] Beneficial effects:

[0022] 1. The guest water and rainwater pollution control facility can first dissipate energy and pre-treat the peripheral guest water and rainwater by sedimentation and filtration, and then purify the relatively clean rainwater after pre-treatment through infiltration ditch. The purified rainwater can effectively replenish groundwater, and can also be collected along the perforated collection pipe to the downstream rainwater reuse facility for reuse. When the rainwater does not have time to infiltrate, it can overflow along the slope of the infiltration ditch surface and enter the downstream rainwater reuse facility for reuse, which solves the problem of runoff pollution and water accumulation caused by the poor control of peripheral guest water and rainwater in many areas. Moreover, the guest water and rainwater pollution control facility can cooperate well with other rainwater reuse facilities, has a wide range of applications, and the rainwater treatment process meets the requirements of green ecological facilities.

[0023] 2. The rainwater grate can intercept the larger dirt floating in the runoff rainwater. By setting the energy dissipation sedimentation tank in a low-lying area and designing an inclined slope on the pavement surface of the low-lying area, the facility can naturally collect the guest water rainwater from the peripheral runoff, thereby improving the efficiency of rainwater collection. In addition, the rainwater grate covering the energy dissipation sedimentation tank also plays a role in protecting and closing the sedimentation tank, allowing rainwater to flow smoothly into the tank, further promoting the collection and preliminary treatment of rainwater. This design utilizes the natural terrain and structural characteristics to optimize the guidance and concentration of rainwater, and provides convenience for subsequent energy dissipation and sedimentation treatment.

[0024] 3. By setting up a trash screen and a silt settling area in the energy dissipation sedimentation tank, the facility can more effectively remove suspended solids and large particle pollutants in the guest rainwater. The trash screen first intercepts larger solid debris to prevent them from entering the energy dissipation sedimentation tank, while the silt settling area uses gravity to deposit solid particles, thereby purifying the rainwater. In addition, when the water level in the energy dissipation sedimentation tank exceeds the height of the connecting pipe, the excess rainwater can flow smoothly into the infiltration ditch through the pipe. This design not only improves the efficiency of rainwater treatment, but also avoids overflow or functional failure of the facility due to excessive rainwater, ensuring the continuous operation and stability of the entire rainwater pollution control system.

[0025] 4. By setting a slope in the infiltration ditch that is inclined toward the downstream rainwater reuse facility, the flow direction and infiltration process of rainwater are optimized. The replacement soil layer in the infiltration ditch provides an environment suitable for plant growth and enhances the infiltration capacity of rainwater. Green plants help purify rainwater and improve the ecological environment, while the gravel layer increases the permeability of the infiltration ditch and promotes rapid infiltration of rainwater. In addition, the perforated collection pipe is set in the replacement soil layer, which effectively collects the preliminarily purified rainwater and provides a water source for the downstream rainwater reuse facility. One end of the perforated collection pipe buried in the replacement soil layer is in a blocked state, which can reduce the risk of blockage of the perforated collection pipe due to sediment accumulation, thereby improving the long-term operation efficiency and ease of maintenance of the entire rainwater collection system.

[0026] 5. By arranging geotextiles on the sides, bottom, and top of the percolation trench respectively, the anti-seepage performance of the percolation trench is enhanced, preventing the loss of soil particles and avoiding the penetration of pollutants, ensuring the stability of the internal structure of the percolation trench and the purification effect of the water body. The geotextile on the side helps reduce soil erosion on the trench wall and avoid seepage to one side of the energy dissipation sedimentation tank. The geotextile at the bottom can prevent the underlying soil from being scoured by the water flow, while the geotextile on the top helps protect the green plants planted on the gravel layer and maintain the stability of their growth environment. The arrangement of these geotextiles together improves the durability of the entire rainwater pollution control facility and the reliability of its long-term operation.

[0027] 6. By arranging a water distribution weir, the purpose of evenly distributing the rainwater flowing out of the energy dissipation sedimentation tank is achieved, ensuring that the rainwater can be reasonably allocated before entering the percolation trench. The design of the water distribution weir helps optimize the distribution of the water flow, avoiding erosion or scouring caused by excessive water volume in local areas, and at the same time improving the treatment efficiency of the rainwater in the percolation trench. In addition, the design of the water distribution weir also helps reduce the direct impact of the water flow on the percolation trench, protecting the filter media and vegetation in the trench, extending the service life of the facility and maintaining its ecological function. In this way, the rainwater has been more effectively managed and utilized before entering the percolation trench, improving the performance of the entire rainwater pollution control system.

[0028] 7. By designing the longitudinal section of the percolation trench as a trapezoid, the effective guidance and control of the water flow are achieved. The trapezoidal longitudinal section is characterized by a wider upper base than the lower base. Such a design helps form a larger water flow contact area in the trench, thereby increasing the contact time between the water flow and the media in the trench and improving the infiltration and purification efficiency of the rainwater. At the same time, the trapezoidal structure is also beneficial to reducing the lateral pressure of the water flow on the trench wall, reducing the erosion risk, and maintaining the stability of the ditch.

[0029] 8. By arranging a dike between the percolation trench and the energy dissipation sedimentation tank, the water flow control ability of the entire rainwater management facility is enhanced. The presence of the dike helps prevent excessive rainwater from overflowing or flowing over in high-flow situations, ensuring the orderly flow and treatment of rainwater in the facility. In addition, the connecting pipes arranged on the dike allow rainwater to flow from the energy dissipation sedimentation tank to the percolation trench under controlled conditions, maintaining the continuity and stability of the water flow. The design of the dike also helps reduce the erosion of the surrounding area caused by rainwater scouring, protecting the surrounding environment and soil structure. Arranging the dike is an important measure to improve the safety and efficiency of the rainwater management facility.

[0030] 9. Fences are set up on the dike to provide additional security and protection measures. Fences can prevent the entry of foreign matter, animals or unauthorized personnel, thereby protecting the normal operation of the infiltration ditch and energy dissipation sedimentation tank, and avoiding damage to facilities or increased maintenance costs due to external interference. In addition, fences help prevent garbage or other pollutants from entering the rainwater treatment area, ensuring that the quality of collected and treated rainwater is not polluted, and improving the safety of rainwater reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of a guest water and rainwater pollution control facility provided by the utility model;

[0032] Figure 2 A top view of a guest water and rainwater pollution control facility provided by the utility model;

[0033] Figure 3 for Figure 1 Schematic diagram of the longitudinal section of the middle drainage pipe;

[0034] Among them, 1-infiltration ditch, 2-perforated collection pipe, 3-bottom geotextile, 4-plain soil layer, 5-gravel layer, 6-top geotextile, 7-side geotextile, 8-water distribution weir, 9-energy dissipation sedimentation tank, 10-mud and sand settling area, 11-paved surface, 12-rainwater grate, 13-trash net, 14-embankment, 15-connecting pipe, 16-fence. DETAILED DESCRIPTION

[0035] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0036] Reference Figures 1 to 3 , a guest water and rainwater pollution control facility, comprising an energy dissipation sedimentation tank 9 and a percolation ditch 1, wherein:

[0037] The energy dissipation sedimentation tank 9 is used to dissipate energy and filter pre-treatment of peripheral guest rainwater; the infiltration ditch 1 is connected to the energy dissipation sedimentation tank 9 through a connecting pipe 15, and the guest rainwater pre-treated by the energy dissipation sedimentation tank 9 can be collected by the perforated collection pipe 2 buried in the infiltration ditch 1 to the downstream rainwater reuse facility for reuse, and can be infiltrated and purified in the infiltration ditch 1 to replenish groundwater, and the water that does not have time to infiltrate can overflow along the slope of the surface of the infiltration ditch 1 into the downstream rainwater reuse facility. The downstream rainwater reuse facility can be an infiltration pipe, an infiltration well, a purification type rainwater garden or a rainwater pond, etc.

[0038] In this way, the guest water and rainwater pollution control facility can first dissipate energy and pre-treat the peripheral guest water and rainwater by sedimentation and filtration, and then infiltrate and purify the relatively clean rainwater after pretreatment through the infiltration ditch 1. The purified rainwater can effectively replenish groundwater, and can also be collected along the perforated collection pipe 2 to the downstream rainwater reuse facility for reuse. When the rainwater does not have time to infiltrate, it can overflow along the surface slope of the infiltration ditch 1 and enter the downstream rainwater reuse facility for reuse, which solves the problem of runoff pollution and water accumulation caused by the poor control of peripheral guest water and rainwater in many areas. Moreover, the guest water and rainwater pollution control facility can cooperate well with other rainwater reuse facilities, has a wide range of applications, and the rainwater treatment process meets the requirements of green ecological facilities.

[0039] In the present embodiment, the energy dissipation sedimentation tank 9 is arranged in a low-lying area, and a rainwater grate 12 is arranged on the top of the energy dissipation sedimentation tank 9. The pavement surface 11 of the low-lying area is provided with a slope inclined toward the rainwater grate 12, which is used to collect the guest water rainwater of the peripheral runoff. The guest water rainwater of the periphery can fall into the energy dissipation sedimentation tank 9 through the rainwater grate 12 after being collected in the low-lying area. In this way, the rainwater grate 12 can intercept the relatively large dirt floating in the runoff rainwater. By arranging the energy dissipation sedimentation tank 9 in a low-lying area and designing an inclined slope on the pavement surface 11 of the low-lying area, the facility can naturally collect the guest water rainwater of the peripheral runoff, thereby improving the efficiency of rainwater collection. In addition, the rainwater grate 12 covering the top of the energy dissipation sedimentation tank 9 also plays a role in protecting and closing the sedimentation tank, allowing rainwater to flow smoothly into the tank, further promoting the collection and preliminary treatment of rainwater. This design utilizes natural terrain and structural characteristics to optimize the guidance and concentration of rainwater, facilitating subsequent energy dissipation and sedimentation treatment.

[0040] Reference Figure 1 In this embodiment, a trash screen 13 is provided above the energy dissipation sedimentation tank 9, and a mud and sand settling area 10 is provided at the bottom of the energy dissipation sedimentation tank 9. Rainwater falling into the energy dissipation sedimentation tank through the rainwater grate first falls into the trash screen 13, and then falls into the mud and sand settling area 10; when the rainwater in the energy dissipation sedimentation tank 9 overflows the connecting pipe 15, the rainwater in the energy dissipation sedimentation tank 9 flows into the infiltration ditch 1 through the connecting pipe 15. In this way, by providing the trash screen 13 and the mud and sand settling area 10 in the energy dissipation sedimentation tank 9, the facility can more effectively remove suspended matter and large particle pollutants in the guest rainwater. The trash screen 13 first intercepts larger solid debris to prevent them from entering the energy dissipation sedimentation tank 9, while the mud and sand settling area 10 uses gravity to deposit solid particles, thereby purifying the rainwater. In addition, when the water level in the energy dissipation sedimentation tank 9 exceeds the height of the connecting pipe 15, the excess rainwater can flow smoothly into the infiltration ditch 1 through the pipe 15. This design not only improves the efficiency of rainwater treatment, but also avoids overflow or functional failure of facilities caused by excessive rainwater, ensuring the continuous operation and stability of the entire rainwater pollution control system.

[0041] Reference Figure 1 In this embodiment, the infiltration ditch is provided with a slope inclined towards the downstream rainwater reuse facility, and a replacement soil layer (or sandy soil layer) is laid in the infiltration ditch 1. Green plants are planted on the replacement soil layer, and a gravel layer 5 is laid on the replacement soil layer. Rainwater can infiltrate through the gravel layer 5 to the replacement soil layer; the perforated collection pipe 2 is buried in the replacement soil layer. Reference Figure 3 One end of the perforated collection pipe 2 buried in the replacement soil layer is in a sealed state. In this way, by setting a slope inclined towards the downstream rainwater reuse facility in the infiltration ditch 1, the flow direction and infiltration process of rainwater are optimized. The replacement soil layer in the infiltration ditch 1 provides an environment suitable for plant growth and enhances the infiltration capacity of rainwater. The green plants contribute to the purification of rainwater and the improvement of the ecological environment, while the gravel layer 5 increases the water permeability of the infiltration ditch 1 and promotes the rapid infiltration of rainwater. In addition, the perforated collection pipe 2 is arranged in the replacement soil layer, effectively collecting the preliminarily purified rainwater and providing a water source for the downstream rainwater reuse facility. One end of the perforated collection pipe 2 buried in the replacement soil layer is in a sealed state, which can reduce the risk of blockage of the perforated collection pipe 2 caused by sediment accumulation, thereby improving the long-term operation efficiency and maintenance simplicity of the entire rainwater collection system.

[0042] More specifically, reference Figure 1 In this embodiment, a side geotextile 7 is provided on one side of the infiltration ditch 1 close to the energy dissipation sedimentation tank 9, a bottom geotextile 3 is provided below the bottom of the infiltration ditch 1 in the replacement soil layer, a compacted plain soil layer 4 is below the bottom geotextile 3, and a top geotextile 6 is provided below the gravel layer 5 at the top of the infiltration ditch 1. In this way, by setting geotextiles on the side, bottom and top of the infiltration ditch 1 respectively, the anti-seepage performance of the infiltration ditch 1 is enhanced, the loss of soil particles is prevented, and the penetration of pollutants is avoided, ensuring the stability of the internal structure of the infiltration ditch 1 and the purification effect of the water body. The side geotextile 7 helps to reduce soil erosion on the ditch wall and avoid infiltration on one side of the energy dissipation sedimentation tank 9. The bottom geotextile 3 can prevent the underlying soil from being washed away by the water flow, while the top geotextile 6 helps to protect the green plants planted on the gravel layer 5 and maintain the stability of their growth environment. The setting of these geotextiles together improves the durability of the entire rainwater pollution control facility and the reliability of long-term operation.

[0043] Reference Figure 1, in this embodiment, it further includes a water distribution weir 8. The water distribution weir 8 is arranged at one end of the connecting pipe 15 close to the infiltration trench 1. The rainwater in the energy dissipation sedimentation tank 9 flows into the water distribution weir 8 through the connecting pipe 15 and then is distributed by the water distribution weir 8 and flows into the infiltration trench 1. In this way, by setting the water distribution weir 8, the purpose of evenly distributing the rainwater flowing out of the energy dissipation sedimentation tank 9 is achieved, ensuring that the rainwater can be reasonably allocated before entering the infiltration trench 1. The design of the water distribution weir 8 helps to optimize the distribution of water flow, avoid erosion or scouring in local areas due to excessive water volume, and at the same time improve the treatment efficiency of rainwater in the infiltration trench 1. In addition, the design of the water distribution weir 8 also helps to reduce the direct impact of water flow on the infiltration trench 1, protect the filtering medium and vegetation in the trench, extend the service life of the facility and maintain its ecological function. In this way, the rainwater has been more effectively managed and utilized before entering the infiltration trench 1, improving the performance of the entire rainwater pollution control system.

[0044] Refer to Figure 1 , in this embodiment, the longitudinal section of the infiltration trench 1 is trapezoidal, and the upper base of the trapezoid is larger than the lower base. In this way, by designing the longitudinal section of the infiltration trench 1 to be trapezoidal, the effective guidance and control of water flow are achieved. The characteristic of the trapezoidal longitudinal section is that the upper base is wider than the lower base. Such a design helps to form a larger water flow contact area in the trench, thereby increasing the contact time between the water flow and the medium in the trench and improving the infiltration and purification efficiency of rainwater. At the same time, the trapezoidal structure is also beneficial to reducing the lateral pressure of the water flow on the trench wall, reducing the erosion risk and maintaining the stability of the ditch.

[0045] Refer to Figure 1 And Figure 2 , in this embodiment, a dike 14 is also provided between the infiltration trench 1 and the energy dissipation sedimentation tank 9. The connecting pipe is arranged below the dike 14. In this way, by setting the dike 14 between the infiltration trench 1 and the energy dissipation sedimentation tank 9, the water flow control ability of the entire rainwater management facility is enhanced. The existence of the dike 14 helps to prevent excessive rainwater from overflowing or flowing over under high flow conditions, ensuring the orderly flow and treatment of rainwater in the facility. In addition, the connecting pipe 15 arranged on the dike 14 allows rainwater to flow from the energy dissipation sedimentation tank 9 to the infiltration trench 1 under controlled conditions, maintaining the continuity and stability of the water flow. The design of the dike 14 also helps to reduce the erosion of the surrounding area caused by rainwater scouring, protecting the surrounding environment and soil structure. Setting the dike 16 is an important measure to improve the safety and efficiency of the rainwater management facility.

[0046] In addition, refer to Figure 1, in this embodiment, a fence 16 is provided on the dike 14, which provides additional safety and protection measures. The fence 16 can prevent the entry of foreign substances, animals or unauthorized personnel, thus protecting the normal operation of the infiltration ditch 1 and the energy dissipation sedimentation tank 9, and avoiding facility damage or increased maintenance costs caused by external interference. In addition, the fence helps prevent garbage or other pollutants from entering the rainwater treatment area, ensures that the quality of the collected and treated rainwater is not polluted, and improves the safety of rainwater reuse.

[0047] Generally speaking, this embodiment proposes a comprehensive facility for controlling the pollution of external rainwater. Through the combined action of the energy dissipation sedimentation tank 9 and the infiltration ditch 1, this facility realizes the efficient treatment of external rainwater. The energy dissipation sedimentation tank 9 is responsible for the preliminary energy dissipation and filtration pretreatment of rainwater to remove pollutants with larger particles. The infiltration ditch 1 further collects the pretreated rainwater and transports the rainwater to the downstream rainwater reuse facility through the buried perforated collection pipe 2, realizing the resource utilization of rainwater. The specific functions include:

[0048] Energy dissipation and pretreatment: After the rainwater enters the system, it is first treated by the energy dissipation sedimentation tank 9, reducing the energy and speed. At the same time, larger suspended solids are filtered out, improving the efficiency of subsequent treatment.

[0049] Connectivity: The energy dissipation sedimentation tank 9 is connected to the infiltration ditch 1 through the connecting pipe 15 to ensure the smooth transfer of rainwater.

[0050] Infiltration and purification: The infiltration ditch 1 is designed to allow rainwater to infiltrate in the ditch, and further purify the rainwater through the natural filtration of the soil, while replenishing the groundwater resources.

[0051] Overflow management: For the rainwater that fails to infiltrate in time, through the slope design of the surface of the infiltration ditch 1, it overflows orderly to the downstream rainwater reuse facility, avoiding rainwater accumulation and possible flood risks.

[0052] Resource recovery: Through the perforated collection pipe 2, the purified rainwater is collected, providing reusable water resources for downstream facilities and increasing the utilization efficiency of rainwater.

[0053] The design of this facility takes into account the collection, treatment, purification, reuse and overflow management of rainwater, forming a complete rainwater management and utilization system, effectively controlling the pollution problem brought by external rainwater, and promoting the sustainable utilization of rainwater resources.

[0054] In summary, the above is only a preferred embodiment of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A guest water and rainwater pollution control facility, characterized in that: Including energy dissipation sedimentation tank and infiltration ditch; The energy dissipation sedimentation tank is used to dissipate energy and filter pre-process the peripheral guest water and rainwater; The infiltration ditch is connected to the energy dissipation sedimentation tank through a connecting pipe. The guest rainwater pre-treated in the energy dissipation sedimentation tank can be collected by the perforated collection pipe buried in the infiltration ditch to the downstream rainwater reuse facility for reuse, and can infiltrate and purify in the infiltration ditch to replenish groundwater. The water that does not have time to infiltrate can overflow along the slope of the infiltration ditch surface into the downstream rainwater reuse facility.

2. A guest water and rainwater pollution control facility according to claim 1, characterized in that: The energy dissipation sedimentation tank is arranged in a low-lying area, and a rainwater grate is arranged on the top of the energy dissipation sedimentation tank; The paved surface of the low-lying land is provided with a slope inclined toward the rainwater grate, which is used to collect the guest rainwater of the peripheral runoff. The guest rainwater of the periphery can fall into the energy dissipation sedimentation tank through the rainwater grate after being collected by the low-lying land.

3. A guest water and rainwater pollution control facility according to claim 2, characterized in that: A trash screen is arranged above the energy dissipation sedimentation tank, and a mud and sand settling area is arranged at the bottom of the energy dissipation sedimentation tank. Rainwater falling into the energy dissipation sedimentation tank through the rainwater grate first falls into the trash screen and then falls into the mud and sand settling area. When the rainwater in the energy dissipation sedimentation tank overflows the connecting pipe, the rainwater in the energy dissipation sedimentation tank flows into the infiltration ditch through the connecting pipe.

4. A guest water and rainwater pollution control facility according to claim 3, characterized in that: The infiltration ditch is provided with a slope inclined toward the downstream rainwater recycling facility, and the infiltration ditch is provided with a replacement soil layer, green plants are planted on the replacement soil layer, and a gravel layer is laid on the replacement soil layer, and rainwater can infiltrate into the replacement soil layer along the gravel layer; The perforated collecting pipe is buried in the replacement soil layer, and one end of the perforated collecting pipe buried in the replacement soil layer is in a blocked state.

5. A guest water and rainwater pollution control facility according to claim 4, characterized in that: A side geotextile is provided on the infiltration ditch near the energy dissipation sedimentation tank, a bottom geotextile is provided at the bottom of the infiltration ditch below the replacement soil layer, and a top geotextile is provided at the top of the infiltration ditch below the gravel layer.

6. A guest water and rainwater pollution control facility according to claim 4 or 5, characterized in that: It also includes water distribution weirs; The water distribution weir is arranged at one end of the connecting pipe close to the infiltration ditch. Rainwater in the energy dissipation sedimentation tank flows into the water distribution weir through the connecting pipe and then flows into the infiltration ditch through the water distribution weir.

7. A guest water and rainwater pollution control facility according to claim 6, characterized in that: The longitudinal section of the infiltration ditch is a trapezoid, and the upper base of the trapezoid is larger than the lower base.

8. A guest water and rainwater pollution control facility according to claim 7, characterized in that: A dike is provided between the infiltration ditch and the energy dissipation sedimentation tank, and the communication pipeline is provided below the dike.

9. A guest water and rainwater pollution control facility according to claim 8, characterized in that: A fence is arranged on the dike.

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