One-way water passing device for separating rainwater drainage outlet of river and lake, simulation method and application thereof

Abstract

The present application relates to a kind of one-way water passing device and simulation method and application of separating into river and lake rainwater drain, belong to resource and environmental protection technical field, the single water passing device includes arc blind ditch top, a row or several rows of water holes are set in arc blind ditch top at fixed interval, for drainage;Blind ditch top is connected with cuboid float, so that device is suspended.The bottom of the device is fixed at the bottom of the pool.The simulation method is to construct artificial simulation river and lake rainwater drain, and multiple one-way water passing devices are arranged in the drain.The application is to apply the one-way water passing device to river and lake rainwater drain.The present application has good wave dissipation effect, and the bottom is fixed and flexible waterproof enclosure, which has strong wind and wave resistance, strong sealing, prevents leakage and high durability.According to the design process, one-way water passing is realized, and hydraulic retention time is flexibly adjusted according to liquid level change.The float has wave dissipation performance to some extent.The water passing hole can adjust flow rate and flow according to actual situation, so as to adjust hydraulic retention time.

Description

TECHNICAL FIELD

[0001] The present application relates to a one-way water passing device for separating rainwater discharge into a river or lake and a simulation method and application thereof, and belongs to the technical field of resource and environmental protection. BACKGROUND

[0002] With the national black and odorous water body treatment reaching the end stage, urban sewage treatment facilities are gradually improved, and urban water pollution treatment gradually shifts from point source pollution to non-point source pollution control. With the increase of urbanization density, the impermeability of the underlying surface gradually increases, the accumulation of pollutants increases, and the accumulation rate increases. The average concentration of pollutants in a rainfall event is increasing, and the initial rainwater runoff effect makes the initial rainwater pollution more serious. The initial rainwater contains particulate matter in the air during rainfall, heavy metals and pollutants scattered on the underlying surface during runoff. These pollutants come from atmospheric dry and wet deposition, motor vehicle emissions and solid debris, and are discharged into the receiving water body through urban drainage network after rainwater and artificial scouring. The urban non-point source pollution of initial rainwater caused by rainfall has become a major factor restricting the improvement of urban water environmental quality.

[0003] In order to overcome the above problems, the currently more applied technology is to add floating bed and enclosure at the rainwater discharge port to purify the rainwater into the river or lake. This method uses the purification function of plants to purify the pollution load carried by rainwater to a certain extent, but the general rainwater discharge port is under the water surface, and the in-situ construction of the lake and reservoir is difficult. At the same time, the current treatment process measures cannot pass water in one direction according to the design process, cannot control the hydraulic retention time and the effect of plant contact purification, and affects the overall treatment effect. On the other hand, the current non-fixed device in the lake and reservoir has poor wind and wave resistance, and is easy to fall. Therefore, there is currently a lack of technology that can effectively solve the above needs, especially mature technology with low investment and basically no operating cost. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a one-way water passing device for separating rainwater discharge into a river or lake and a simulation method and application thereof, and the specific technical scheme is as follows:

[0005] A one-way water passing device for separating rainwater discharge into a river or lake, comprising a blind ditch plate (1), a floating cylinder (3) and a waterproof enclosure (4), wherein the floating cylinder (3) is arranged below the blind ditch plate (1), and the waterproof enclosure (4) is arranged below the floating cylinder (3) and extends downward to the surface of underwater sediment;

[0006] The blind ditch plate (1) is a long strip shape with a top arc-shaped arch, the blind ditch plate (1) is provided with a row of water passing holes (7) distributed equidistantly along the length direction, the water inlet end of the water passing hole (7) is located on the side of the arc-shaped arch facing the upstream, the water outlet end is located on the side of the arc-shaped arch facing the downstream, and the horizontal height of the water inlet end of the water passing hole (7) is higher than that of the water outlet end.

[0007] Further, the water passing hole (7) is located in the radial section of the blind ditch plate (1).

[0008] Further, the water inlet end of the water passing hole (7) is located at the position close to the top of the arc-shaped arch of the blind ditch plate (1), and the water outlet end of the water passing hole (7) is located at the position close to the downstream side edge of the blind ditch plate (1).

[0009] Further, the water passing hole (7) is in a straight line shape or a downward arc-shaped concave shape from the water inlet end to the water outlet end.

[0010] Further, the waterproof enclosure (4) includes a waterproof cloth and an enclosure frame, the waterproof cloth and the enclosure frame are connected, the bottom of the enclosure frame is provided with a support, the support includes a wooden pile and a bamboo pole, the wooden pile is perpendicular to the ground and is driven into the pool bottom, the bamboo pole is horizontally connected to adjacent wooden piles to form a whole cube.

[0011] Further, the waterproof enclosure (4) includes a waterproof cloth and an enclosure frame, the waterproof cloth and the enclosure frame are connected, the bottom of the enclosure frame is provided with a fixed rope and a fixed pile, the fixed rope connects all the enclosure frames, the fixed pile is fixed in the pool bottom, the fixed rope is fixedly connected with the fixed pile, and a stone cage is arranged on the fixed rope between two adjacent fixed piles, and the stone cage sinks into the pool bottom by pressing the fixed rope.

[0012] A one-way water passing simulation method for separating river and lake rainwater discharge outlets, comprising the following steps:

[0013] Step one: build a fence with more than one inflow port and more than one outflow port as a simulation river and lake, and put the corresponding river and lake water body and bottom mud into the simulation river and lake, the water depth and the bottom mud depth match the river and lake of the simulation section;

[0014] Step two: set an ecological enclosure opposite to the inflow port in the simulation river and lake, the ecological enclosure is closed on three sides, one side faces the inflow direction, the ecological enclosure is divided into a sedimentation zone, an ecological elastic filter bed zone and an ecological purification zone from the inflow direction to the downstream, respectively, and a one-way water passing device is arranged between each zone, and the inflow port of the sedimentation zone is also provided with a one-way water passing device;

[0015] Step three: fix the bottom of the support on the pool bottom, after the wooden pile is driven, dig a straight and narrow ditch above 0.5m between the two adjacent wooden piles; the waterproof enclosure (4) is wrapped around the four wooden piles outside the wooden piles, so that the whole support is isolated from water, the upper edge of the waterproof cloth is fixed tightly with the float, the lower edge is wrapped with bricks or mud, and is buried in the dug ditch and is buried straight and compacted;

[0016] Step four: combine the waterproof enclosure (4) with the blind ditch plate (1) and the float (3) on the upper part of the waterproof enclosure (4) into a complete body, so that the water inlet end of the water passing hole of the blind ditch plate (1) faces the upstream side of the water passing, the arc-shaped top of the blind ditch plate (1) is above the water surface, so that the water flow passes through the water passing hole and enters the next area smoothly, and the float is arranged and fixed on the lower surface of the blind ditch plate (1);

[0017] Step five: the height of the waterproof enclosure (4) is greater than the water depth, and the flexible enclosure mantle of the waterproof enclosure (4) has wrinkles;

[0018] Step six: water flow is introduced into the simulated ecological enclosure from the flow port, and the flow rate and flow velocity of the water flow are matched with the river and lake of the simulation section.

[0019] Further, the wall is at least one glass wall or acrylic wall, and the other walls are concrete walls.

[0020] An application of a one-way water passing device for separating river and lake rainwater discharge ports, ecological enclosures are arranged at water inlets and / or water outlets of rivers and lakes, and a plurality of spaced one-way water passing devices are arranged in the ecological enclosures.

[0021] The application has the following beneficial effects:

[0022] The circular arc-shaped blind ditch top has good wave dissipation effect, the bottom is fixed, and the flexible waterproof enclosure has strong wind and wave resistance. According to the designed flow process, one-way water passing is realized, the hydraulic retention time is flexibly adjusted according to the liquid level height, and extreme conditions such as strong convection weather can be coped with. The compatibility is strong, and the device can adapt to various river and lake storage systems. The cost is low, the layout is simple, the processing is easy, the durability is strong, the applicability is strong, the investment is low, and basically no operation cost is needed. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a longitudinal sectional view of the one-way water passing dam of the application,

[0024] Figure 2 is a three-dimensional schematic view of the one-way water passing dam of the application,

[0025] Figure 3 is a whole plan view of the test application of the application,

[0026] Figure 1In the middle: 1-blind drain plate, 11-inlet blind drain plate, 12-outlet blind drain plate, 3-float, 4-waterproof enclosure, 5-inlet water passage hole, 6-outlet outlet, 7-water passage hole, 8-concrete wall, 9-ecological enclosure, 10-acrylic wall or glass wall, 13-one-way dam. Detailed Implementation

[0027] The technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0028] like Figure 1 and 2 As shown, the unidirectional water passage device, also called a unidirectional water passage dam, consists of four parts: a buoy, a blind drain plate, an arc-shaped blind drain top, and a waterproof enclosure. The arc-shaped blind drain top, buoy, and PVC waterproof enclosure are connected sequentially from top to bottom. The water passage holes and outlet holes are installed inside the blind drain top along the water flow direction using a drilling device. The bottom fixing device is fixed to the bottom of the river or lake by the enclosure bracket and PVC waterproof cloth. The unidirectional water passage and the control of hydraulic residence time are achieved through the design of the buoy and the water passage holes arranged at different heights.

[0029] As a preferred option, the pontoon is directly molded from HDPE, with a hollow cuboid shape and a certain thickness to achieve the best suspension effect.

[0030] The density of the buoy can be changed by adding liquid, thereby adjusting the suspension depth according to the suspension state.

[0031] The pontoons and the top of the arched blind drain and the surrounding waterproof fabric are tightly connected to prevent water leakage.

[0032] As a preferred option, the arched elongated shape at the top of the circular blind drain can be obtained by nesting the plastic blind drain within a shaping frame, and then combined with a float to float in the water.

[0033] The area below the water inlet is submerged in water, while the area above it is exposed above the water surface to achieve the desired water flow.

[0034] As a preferred option, the waterproof enclosure should be made of polyvinyl chloride (PVC) and its length should be slightly longer than the designed water depth to ensure that the waterproof enclosure can allow water to pass through in one direction after it is stretched.

[0035] Depending on the designed water depth, the lower enclosure of the device needs to be connected to the outer enclosure in an elastic manner.

[0036] The waterproof enclosure is arranged below the floating pontoon and extends downward to the underwater bottom surface; the bottom waterproof enclosure is fixed firmly at the connection with the whole device to ensure that the lower part of the water dam is not leaking.

[0037] As a preference, the water passing hole adopts a circular design. The arc is arranged on the radial section of the blind ditch top, the water inlet end of the water passing hole is located near the arc-shaped arched top of the blind ditch plate, and the water outlet end of the water passing hole is located near the downstream side edge of the blind ditch plate.

[0038] One row is arranged with not less than 10, each size is not less than 5mm, the aperture size is in a 1:10 proportional relationship with the top view width of the arc-shaped blind ditch plate, and the specific size is determined according to the required hydraulic retention time through the height difference arrangement.

[0039] As a preference, the device bottom fixing mode 1 includes fixed ropes and fixed piles, bamboo poles and gabions are placed between the two fixed ropes.

[0040] The bamboo poles or steel piles are placed with a spacing, and the gabions in the middle are placed in the river bottom to strengthen the fixation.

[0041] As a preference, the device bottom fixing mode 2 uses a PVC waterproof cloth to wrap the support.

[0042] The support is composed of wooden piles, green bamboos, bamboo poles and the like to form a plane.

[0043] The wooden piles of each enclosure are positioned and driven into the pool bottom, after the wooden piles are driven, a 0.5m or more deep, straight and narrow ditch is dug on the connecting line between the two piles; the enclosure is surrounded on the support along the outer side of the wooden pile, the upper edge of the waterproof cloth is fixed tightly with the floating pontoon, the lower edge is wrapped with bricks or mud blocks, and is buried in the dug ditch, buried straight and compacted, the height of the enclosure is slightly longer than the designed water depth, so that it maintains an elastic state at the normal water depth, and the specific length is determined according to the designed water depth and the required depth of liquid level change.

[0044] Now a kind of application scene of the application will be briefly introduced: as shown in the figure, Figure 2 The water passing dam is used to realize one-way flow passing and control the hydraulic retention time in the region. Two sets of rectangular water channels are arranged in parallel in the device, two groups of the device are arranged in parallel in the pool body to establish relatively independent regions for water body segmentation, and PVC enclosures are selected to block the exchange of water bodies between the environment and the device regions.

[0045] The application will be further described in detail in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the application in a schematic manner, and therefore only show the structures related to the application.

[0046] As shown in the figure, Figure 3As shown, the whole structure of the application can be observed macroscopically, which is a one-way water passing device of the multi-stage regulating and purifying unit separated into river and lake rainwater discharge ports. In actual application, the device can be placed in different partitions, the bottom is fixed, and different ways can be adopted according to the specific requirements of liquid leakage. When a tight fixed way is adopted, the device can be fixed according to the design of the device to minimize the bottom leakage, so that the liquid in different partitions does not exchange at the bottom to affect the regulating and purifying effect.

[0047] The following specifically introduces each independent structure of the application:

[0048] The application comprises an inlet end blind ditch plate 11, an outlet end blind ditch plate 12, a float 3, a waterproof cloth 4, an inlet end water passing hole 5 and an outlet end outlet hole 6.

[0049] The inlet end blind ditch plate 11 and the outlet end blind ditch plate 12 jointly constitute a circular arc blind ditch top, which can be obtained from a plastic blind ditch nest and a shaping frame, and is combined with the float to be shaped and suspended in water. Further, the water passing hole inlet is submerged in water below and exposed above the water surface to achieve the water passing effect.

[0050] The float 3 is directly formed by HDPE, is a hollow cuboid with a certain thickness to achieve the best suspension effect. Under the pressure of the blind ditch plate, the water depth of the float 3 should be controlled at 1 / 2R, at this time, in order to make the device float stably in the water body, the inner and outer diameters of the float should satisfy the following formula:

[0051] 1 / 2ρ 水 π(R 2 -r 2 )Lg=G+ρ HDPE πr 2 Lg, wherein G is the weight of the dam body, ρ HDPE is the density of HDPE, ρ 水 is the density of the water body, R is the outer diameter of the float, r is the inner diameter of the float, and the length is L.

[0052] Further, the density of the float can also be changed by adding liquid to adjust the suspension depth according to the suspension state.

[0053] The waterproof cloth 4 is made of polyvinyl chloride (PVC), and the length needs to be slightly longer than the designed water depth to ensure that the waterproof enclosure can achieve one-way water passing after being straightened. Further, according to the designed water depth, the lower enclosure of the device needs to be connected with the outer enclosure in an elastic state. Further, the bottom waterproof enclosure is fixedly connected with the whole device to ensure that the lower part of the water passing dam does not leak.

[0054] The water passing hole is composed of a water inlet end water passing hole 5 and a water outlet end overflow 6, adopts a circular design, is arranged in an arc shape on the blind ditch top, and makes water flow smoothly into the next partition according to the water flow direction. Further, a row of not less than 10 is arranged, each with a size not less than 5 mm, the hole diameter size is in a 1:10 proportional relationship with the width of the arc blind ditch plate, and is arranged through the height difference, and the specific size is determined according to the required hydraulic retention time (HRT). The hydraulic retention time calculation formula is as follows:

[0055] HRT = V / Q, wherein V is the water storage tank volume, and Q is the water inflow.

[0056] Further, considering that the water passing hole is easy to be blocked, when indoor or field tests are carried out, a grid should be arranged in front of the one-way water dam for preliminary interception; in open water, a fine iron mesh or fishing net is covered on the water passing hole according to the on-site material selection, and is replaced regularly.

[0057] Device bottom fixing method 1:

[0058] It includes fixed ropes and fixed piles, bamboo poles or steel piles are placed at intervals, gabions are placed between the two fixed ropes, and the riverbed bottom contacts the gabions to enhance fixation.

[0059] Method 2:

[0060] The support is wrapped with PVC waterproof cloth. The support is composed of wooden piles, green bamboos, bamboo poles and the like to form a plane. The wooden piles of each enclosure are positioned and driven into the pool bottom, after the wooden piles are driven, a 0.5 m or more deep, straight and narrow ditch is dug on the connecting line between the two piles; the upper edge of the waterproof cloth is tightly fixed with the float, the lower edge is wrapped with bricks or mud blocks, and is buried in the dug ditch, buried straight and compacted, the enclosure height is slightly longer than the design water depth, so that it maintains an elastic state at normal water depth, and the specific length is determined according to the design water depth and the required depth of liquid level change.

[0061] A one-way water passing device of a multi-stage regulation and storage purification unit for separating rainwater discharge outlets into rivers and lakes, which is composed of a float, a blind ditch plate, a circular arc blind ditch top and a waterproof enclosure, can realize one-way water permeation between units of the in-situ rainwater discharge outlet purification system in the lake and reservoir, and comprises the following steps:

[0062] Step one: the device can be placed between different partitions, as shown in Figure 3 , and is respectively arranged at the upstream of the sedimentation zone, between the sedimentation zone and the ecological flexible filter bed, and between the ecological flexible filter bed and the ecological purification zone. When a close fixed method is adopted, the device can be fixed according to the design of the device to minimize the bottom leakage, so that the liquid in different partitions does not exchange at the bottom to affect the regulation and storage purification effect.

[0063] Step two: after the bottom is fixed, combine the enclosure with the upper part of each structure into a complete body, set the float so that the water inlet of the arc-shaped blind ditch top just reaches the water surface, and make the water flow smoothly through the next area.

[0064] Step three: when the water level changes, the height of the flexible enclosure mantle needed will change, so the flexible enclosure mantle in the water will form wrinkles or be straightened out. To prevent the enclosure from losing or weakening its effectiveness or even being damaged, the bottom needs to be fixed tightly according to the method described above.

[0065] In this embodiment: the three partitions of the device are separated by the one-way water dam 13, and the stable water flow and the height difference of the liquid level ensure one-way water flow. The three partitions are surrounded by the ecological enclosure 9, and the water bodies do not interfere with each other.

[0066] Specifically, the ecological enclosure is composed of PVC waterproof cloth and an enclosure frame, and the device bottom fixing structure uses PVC waterproof cloth. The upper edge of the waterproof cloth is fixed tightly with the float, and the lower edge is wrapped with bricks or mud and buried in the dug ditch. The buried straight and compacted enclosure has a height slightly longer than the designed water depth, so that it remains in a non-straightened state at normal water depth. The specific length is determined according to the designed water depth and the required depth of liquid level change.

[0067] In this embodiment: the one-way water dam bottom enclosure is closely combined with the ecological enclosure, and the combination ensures the flexibility of the bottom enclosure up and down, i.e. it can be stretched and contracted with the liquid level height driven by the float, ensuring that the bottom does not leak water.

[0068] The wall has at least one glass wall or acrylic wall 10, and the other walls are concrete walls 8.

[0069] In this embodiment: to ensure water flow between regions and prevent water overflow, the size and aperture size of the water dam need to be adjusted according to the maximum water storage capacity of each region. In this embodiment, the one-way water dam needs to achieve a water flow rate of 80%, and the water flow rate calculation formula is as follows:

[0070] W 过水 =Q 出水 / Q 进水 ﹡100%, where Q 出水 is the outflow, and Q 进水 is the inflow.

[0071] The working principle and use process are as follows:

[0072] Place the one-way water dam and the ecological enclosure in the lake area to be used, adjust the water inlet and outlet of the one-way water dam and the suspension effect of the float according to the designed water depth of different partitions, and achieve one-way water flow. Note that the bottom enclosure should be connected tightly to ensure flexibility and prevent water exchange between partitions; the ecological outer enclosure should be higher than the liquid level inside the device to prevent external water from entering the purification device.

[0073] The above-described embodiments according to the present application are intended to be illustrative only. Changes can be made by those skilled in the art, without departing from the scope of the present application, which is defined by the following claims. The technical scope of the present application is not limited to the above-described embodiments. The technical scope of the present application must be determined based on the scope of the claims.

Claims

1. A one-way water passing device for separating the rainwater discharge into a river or lake, characterized in that: It comprises blind ditch board (1), float (3), waterproof enclosure (4), the float (3) is arranged below blind ditch board (1), waterproof enclosure (4) is arranged below float (3), and it extends to underwater bottom mud surface downwards; The blind ditch board (1) is arc-shaped arch up long strip shape at top, it is provided with a row of equidistantly distributed water passing holes (7) along its length direction, the water inlet end of water passing hole (7) is located at the side of arc-shaped arch up towards upstream, and the water outlet end is located at the side of arc-shaped arch up towards downstream, and the horizontal height of water inlet end of water passing hole (7) is higher than water outlet end.

2. The one-way water-passing device for separating rainwater into a river-lake rainwater discharge port according to claim 1, characterized in that: The water passing hole (7) is located in the radial section of blind ditch board (1).

3. The one-way water-passing device for separating the rainwater discharge into a river-lake according to claim 1, characterized in that: The water inlet end of water passing hole (7) is located at the position close to the top of arc-shaped arch up of blind ditch board (1), and the water outlet end of water passing hole (7) is located at the position close to the downstream side edge of blind ditch board (1).

4. The one-way water-passing device for separating rainwater into a river-lake rainwater discharge port according to claim 1, characterized in that: The water passing hole (7) is linear shape or downward arc-shaped concave shape from water inlet end to water outlet end.

5. The one-way water-passing device for separating rainwater into a river-lake rainwater discharge port according to claim 1, characterized in that: The waterproof enclosure (4) comprises waterproof cloth and enclosure frame, and the waterproof cloth and the enclosure frame are connected, the bottom of the enclosure frame is provided with a support, the support comprises wooden piles and bamboo poles, the wooden piles are perpendicular to the ground, and the bamboo poles are horizontally connected to adjacent wooden piles to form a cube as a whole.

6. The one-way water-passing device for separating rainwater into a river-lake rainwater discharge port according to claim 1, characterized in that: The waterproof enclosure (4) comprises waterproof cloth and enclosure frame, and the waterproof cloth and the enclosure frame are connected, the bottom of the enclosure frame is provided with a fixed rope and a fixed stake, the fixed rope is connected to all the enclosure frames, and the fixed stake is fixed in the pool bottom, the fixed rope is fixedly connected to the fixed stake, and a stone cage is arranged on the fixed rope between two adjacent fixed stakes, and the stone cage is sunk into the pool bottom while pressing the fixed rope.

7. A one-way water passing simulation method for separating the rainwater discharge port of a river lake, characterized in that: It comprises the following steps: Step one: build a fence with more than one inflow port and more than one outflow port as a simulated river or lake, and put the water body and bottom mud of the corresponding river or lake in the simulated river or lake, wherein the water depth and the bottom mud depth are matched with the river or lake of the simulation section; Step two: set an ecological enclosure in the simulated river or lake, which is opposite to the inflow port, and is closed on three sides, and one side faces the inflow direction, and the ecological enclosure is divided into a sedimentation zone, an ecological elastic filter bed zone and an ecological purification zone from the inflow direction to the downstream, and a one-way water passing device as claimed in any one of claims 1-6 is arranged between each zone, and the inflow port of the sedimentation zone is also provided with a one-way water passing device as claimed in any one of claims 1-6; Step three: fix the bottom of the support to the pool bottom, dig a straight and narrow ditch with a depth of more than 0.5 m between two adjacent wooden piles after the wooden piles are driven, wrap four wooden piles outside the wooden piles with the waterproof enclosure (4) to isolate the whole support from water, tightly fix the upper edge of the waterproof cloth to the float, wrap the lower edge of the waterproof cloth with bricks or mud blocks, and bury the waterproof cloth in the dug ditch; Step four: combine the waterproof enclosure (4) with the blind ditch board (1) and the float (3) above the waterproof enclosure (4) to form a complete body, make the water inlet end of the water passing hole of the blind ditch board (1) face the upstream side of water passing, make the arc-shaped top of the blind ditch board (1) be above the water surface to make the water flow smoothly through the water passing hole into the next zone, and fix the float to the lower surface of the blind ditch board (1). Step five: the height of the waterproof enclosure (4) is greater than the water depth, and the flexible enclosure mantle of the waterproof enclosure (4) has a wrinkle; Step six: water is introduced into the simulated ecological enclosure from the inflow port, and the flow rate and flow velocity of the water are matched with the river or lake of the simulation section.

8. The one-way flow simulation method for separating the stormwater into the river and lake according to claim 7, wherein: The wall is at least one glass wall or acrylic wall, and the other walls are concrete walls.

9. A one-way water passing application for separating the rainwater discharge into a river or lake, characterized in that: An ecological enclosure is arranged at the water inlet and / or water outlet of the river or lake, and a plurality of spaced one-way water passing devices as claimed in any one of claims 1-6 are arranged in the ecological enclosure.

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