KR20170128921A - Urban rain garden system - Google Patents

Abstract

According to the present specification, an urban rain garden system is disclosed. Provided is the flooding protection type greenery system, wherein the rain garden system comprises a plant unit having a Leercia spp. plant and a Cyperius spp. plant, a penetration unit, and a water storage unit to be designed and installed in an effective space near a building and street trees of an urban, for example, a rooftop and a park in order to reduce flooding and a non-point pollution source and supply water to a vegetation plant when there is no rain to maintain a green space for a long period of time.

Description

Urban Rain Garden System {URBAN RAIN GARDEN SYSTEM}

An urban lane garden system is disclosed herein for flood reduction and non-point source reduction by rainfall runoff.

Recently, the increase of the impervious water layer due to urbanization and the climate change have a serious adverse effect on the aquatic ecosystem pollution caused by the inflow of the urban flood and the inflow of the city non - point pollution source due to the limitation of the urban sewer system. In addition, the increase in the impervious water layer due to urbanization can interfere with the penetration of water into the underground water during rainfall, and consequently it can affect the city's microclimate or underground water level. Therefore, the rainfall garden system is a useful method for the environment - friendly rainwater treatment method, while the study on the leach characteristics and excellent utilization of such rainwater runoff is actively proceeding.

KR 10-1461655 B1

In one aspect, the present disclosure aims to provide a lane garden system for flood reduction and nonpoint pollution source reduction caused by rainfall runoff, which often occurs in the city.

In one aspect, the techniques disclosed herein include a vegetation section comprising vegetation and vegetation soils; A permeation part including a crushed stone layer and formed on the lower part of the vegetation part; And a reservoir formed at a lower portion of the infiltration unit, wherein the vegetation plant includes a Leersia spp. Plant and a Cyperus spp. Plant, and the vegetation soil And a rainfall inflow hole, wherein the crushed stone layer comprises an infiltration part having an infiltration part having an infiltration part for inflow of rainwater.

In an exemplary embodiment, the lane garden system includes an initial good pretreatment tank formed by separation means with vegetation, infiltration, and reservoir portions, and the initial excellent pretreatment tank is provided with an excellent vegetation- And the rainwater can be supplied to the vegetation part and the infiltration part from the initial excellent pre-treatment tank through the excellent inflow hole of the vegetation part and the excellent inflow port part of the penetration part.

In an exemplary embodiment, the lane garden system may further include a water level adjusting portion, wherein the water level adjusting portion is separated from the vegetation portion and the permeating portion by the partitioning means and connected to the storage portion.

In an exemplary embodiment, the water level regulating portion may be connected to an outlet portion through which rainwater is discharged.

In an exemplary embodiment, the vegetation plant is a Lotus corniculatus var. japonicus Regel and Mimulus nepalensis there is. japonica ).

In an exemplary embodiment, the vegetated soil may comprise sand, silt and clay at a weight ratio of 6 to 8: 1 to 3: 1 to 2.

In an exemplary embodiment, the vegetation soil comprises (a) a pH of 7.8 +/- 0.5; (b) Electrical conductivity (EC) 0.61 ± 0.05 mS / cm; (c) Organic matter content 4.35 ± 0.04%; And (d) Cation Exchange Capacity (CEC) of 37.54 ± 0.7 meq / 100 g.

In an exemplary embodiment, the vegetation part well inflow pipe and the infiltration part well inflow pipe may be a high density polyethylene (HDPE) material.

In an exemplary embodiment, the vegetation part well inflow pipe and the infiltration part well inflow pipe may have an average diameter of 40 mm to 80 mm.

In one exemplary embodiment, the vegetation part well inflow conduit may be connected to the landscape water pipe through which the rainwater stored in the storage part is transferred to the vegetated soil.

In an exemplary embodiment, the lane garden system may further include a geotextile between the vegetation part and the infiltration part.

In an exemplary embodiment, the crushed stone layer may comprise at least one waste material selected from the group consisting of charcoal, waste lumber and briquettes along with gravel.

In an exemplary embodiment, the prefabricated reservoir may have a porosity of 90% or greater.

In one exemplary embodiment, the prefabricated reservoir may be made of plastic of polypropylene (PP).

In one aspect, the lane garden system disclosed herein is designed and installed in urban street trees, in idle spaces around buildings, such as on rooftops and parks, to reduce flood and non-point sources of pollution, It is possible to provide a flood defense type recording system capable of maintaining a green space for a long time.

In another aspect, the lane garden system disclosed herein is environmentally friendly, with no emissions of pollutants, and does not interfere with the penetration of water into the ground during rainfall regardless of the rainfall intensity and efficiently removes contaminants to ensure clean reservoir water There is an effect that can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a lane garden system according to an embodiment of the present invention. FIG.
FIG. 2 (a) is a sectional view and FIG. 2 (b) is a plan sectional view of the assembled storage tank of a lane garden system according to an embodiment of the present invention.
FIG. 3 shows the percentage (%) of removal of pollutants according to the type of vegetation.

Hereinafter, the present invention will be described in detail.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having ", and the like, specify that the presence of stated features, integers, steps, operations, elements, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are, unless expressly defined herein, to be construed as an ideal or overly formal sense Do not.

1 shows a cross-sectional structure of a lane garden system according to an embodiment of the present invention.

The lane garden system according to the present disclosure includes an initial rain pre-treatment tank 100, a vegetation part 200, a permeate part 400 and a storage part 500.

The lane garden system further includes a water level control unit 600 which is separated from the vegetation unit 200 and the permeation unit 400 by the fractionation unit and is connected to the storage unit 500, Respectively. The water level control unit is connected to the outlet 700 through which the rainwater is discharged.

The initial pre-treatment tank 100 is separated from the vegetation part 200, the infiltration part 400 and the storage part 500 by means of the fractionation means. In the initial excellent pretreatment tank, the vegetation part excellent inflow pipe 12a and penetration An inlet of the second stormwater inflow pipe 12b is formed so that the rainwater in the first stormwater pre-treatment tank can be supplied to the oil pipe from the inlet.

That is, the lane garden system according to the present invention is a system in which rainwater is discharged from the initial excellent pre-treatment tank 100 to the vegetation part 200 and the penetration part 400 through the vegetation part inflow well pipe 12a and the infiltration part well inflow pipe 12b, As shown in Fig.

In an exemplary embodiment, the cleansing screen 11 is formed on the upper portion of the initial storm pretreatment tank 100, so that the solids contained in the initial storm drainage can be removed first. The detail screen may comprise a net about 1 mm in diameter.

The vegetation part 200 includes a vegetation plant 21 and a vegetation soil 22 as an upper structure of a lane garden system for creating vegetation. The vegetation part 200 includes heavy metals and nutrients (N, P) To remove contaminants contained in rainwater.

The vegetation 21 efficiently removes contaminants, including Leishia spp. Plants and Cyperus spp. Plants.

In an exemplary embodiment, the vegetation plant 21 further comprises Lotus corniculatus var. Japonicus regel and Mimulus nepalensis var. Japonica to more effectively remove contaminants and to control flood and boiling point It has an effect of reducing a pollution source.

The vegetation soil 22 is a soil of the vegetation part 200 and includes a vegetation part excellent inflow pipe 12a into which rainwater flows from the initial excellent pre-treatment tank 100.

In an exemplary embodiment, the vegetated soil 22 may comprise sand, silt and clay. In this case, the sand, silt and clay are formed at a weight ratio of 6: 8: 1 to 3: 1: 2, specifically 7: 2: 1, in terms of pollutant removal, flood and nonpoint pollution reduction, Suitable for system.

In an exemplary embodiment, the physico-chemical characteristics of the vegetated soil 22 are pH 7.8 ± 0.5, electrical conductivity (EC) 0.61 ± 0.05 mS / cm, organic matter content 4.35 ± 0.04% The Cation Exchange Capacity (CEC) of 37.54 ± 0.7 meq / 100g is suitable for the lane garden system of this specification in terms of pollutant removal, flood and nonpoint pollution reduction.

The infiltration part 400 is formed under the vegetation part 200 and includes a crushed layer 41 as an intermediate structure in which rainwater is infiltrated and filtered before the rainwater is finally moved to the storage part 500.

The crushed stone layer (41) includes a penetration-portion good inflow pipe (12b) into which rainwater flows from the initial good pretreatment tank (100).

In an exemplary embodiment, the thickness of the crushed layer 41 suitable for penetration is preferably 20% to 50% of the total depth of the lane garden system.

In addition, the size of the gravel constituting the crushed stone layer 41 is somewhat irregular, but it can be composed of gravel having an average diameter of 2 to 5 cm to remove the residual material contained in the downflow.

The lane garden system disclosed in the present specification can form a biofilm on the gravel surface of the crushed stone layer for a long period of time to remove contaminants by microorganisms. Nitrogen and phosphorus can be further removed by the biofilm formed through the crushed layer.

In one exemplary embodiment, the crushed stone layer 41 may further comprise waste materials suitable for microbial growth, such as charcoal, waste lumber, and briquettes.

In an exemplary embodiment, a mesh (e.g., mesh No. 150) is formed at the inlet of the oil holes 12a and 12b through which the rainwater flows from the initial pre-treatment tank 100, It is possible to remove foreign substances. The inlet port cross-section of the pipe can be seen in Fig. 1 (c).

In an exemplary embodiment, a valve may be formed in the pores 12a, 12b to control the amount of rainwater entering.

In an exemplary embodiment, there is no limitation on the number of the excellent vegetation part inflow pipe 12a and the infiltration part good inflow pipe 12b, and the material may be a high density polyethylene (HDPE) material.

In an exemplary embodiment, the vegetation part stormwater inflow pipe 12a and the infiltration part stormwater inflow pipe 12b may have an average diameter of 40 mm to 80 mm.

In an exemplary embodiment, the holes formed in the vegetation portion stormwater inflow pipe 12a and the infiltration portion stormwater inflow pipe 12b may have an average diameter of 4 mm to 8 mm.

In one exemplary embodiment, the vegetation part well inflow pipe 12a is connected to the landscape water pipe 52 through which the rainwater stored in the storage part 500 or the water level control part 600 is moved to the vegetated soil 22 . The landscape water pipe is a landscape water transport pipe. The landscape water pipe is connected to an excellent inflow pipe of the vegetation part so that the rainwater stored in the storage part or the water level control part can be moved to the vegetated soil, and the amount of landscape water transferred through the pump and the valve can be adjusted.

In one exemplary embodiment, the vegetation part well inflow pipe 12a may be connected to the landscape water pipe 52 at the opposite entrance of the inflow port from which the rainwater is introduced from the initial rainwater pre-treatment tank 100. At this time, the vegetation-rich inflow pipe and the landscape water pipe may be connected through a mesh (for example, mesh No. 150).

The lane garden system according to the present invention may include a geotextile 300 between the vegetation part 200 and the infiltration part 400 to remove fine soil and suspended matter flowing out from the vegetation part.

The geotextile refers to a fiber or polymer material that is woven based on a material having water permeability and is used in environments such as sand, soil, and gravel. The fiber raw materials used are mainly thermoplastic fibers having excellent physical properties, mechanical properties and chemical resistance. In this specification, the geotextile includes web, mat, net, grid, plastic sheet, etc., which include knitted fabrics, woven fabrics and nonwoven fabrics, Is the best concept.

In an exemplary embodiment, the geotextile may be a nonwoven fabric or a mat.

In another exemplary embodiment, the geopolymer may be a polypropylene or polyethylene material.

The storage unit 500 is formed under the infiltration unit 400 and supports the structure of the upper part of the infiltration unit 400. The storage unit 500 includes the assembled storage unit 51 to store and reuse the rainfall runoff.

In an exemplary embodiment, the reservoir 500 may occupy more than 50% by volume of the total volume of the lane garden system.

The prefabricated storage tank 51 refers to a prefabricated storage tank module system in which a plurality of holes through which rainwater can be moved is formed and the shape of the storage tank 51 is not limited as long as the porosity is 90% or more, which is a space occupied by water. For example, the prefabricated reservoir may have a shape of a trapezoid parallel to the upper and lower sides, wherein the upper and lower portions of the prefabricated reservoir may be stacked in a zigzag form. The assembly type storage tank module can be stably fastened through the groove 5 formed in the assembly type storage tank (see FIG. 2B).

In addition, a plurality of grooves are formed on the bottom plate of the assembled storage tank 51 so that gravel and the like can be gathered therein.

In one exemplary embodiment, the prefabricated reservoir 51 may be made of polypropylene (PP) plastic.

The prefabricated reservoir 51 according to the present invention distributes the load at the upper portion evenly to allow the stability of the system to be considerable, and the storage capacity can be ensured and the secured reservoir can be delivered to the pump for non-rainfall, .

The operation of the lane garden system according to the present invention is as follows.

Firstly, the solids contained in the initial stormwater effluent are firstly removed through the limb screen formed at the upper part of the initial stormwater pretreatment tank, and rainwater flowing through the net formed at the inlet of the oil pipe in the early storm pretreatment tank is passed through the pores to the crushed stone layer Finally, it is transferred to the storage tank.

More specifically, the lane garden system according to the present invention is characterized in that a method of supplying a high concentration of initial rainfall from a pre-treatment tank directly to a storage tank through a crushed stone layer in urban rainfall and rainwater falling directly to a rain garden are transferred to a storage tank through a vegetation plant and a crushed stone layer .

Thus, irrespective of the rainfall intensity, the penetration of water into the underground is not obstructed during the rainfall, and it is possible to secure clean reservoir water due to the nitrogen and phosphorus removal by filtration and herbaceous plants, and the adsorption effect on the vegetation plant and crushed stone layer. do.

On the other hand, rainwater stored in the reservoir or water level control unit can be supplied to the plant through the vegetation-rich inflow pipe through the landscape water pipe by using a pump to utilize the reservoir water as landscape water for non-rainfall. Here, landscape water can be designed to be irrigated according to the capillary phenomenon.

The lane garden system for reducing flood and non-point pollutants according to the present invention can be easily applied to limited sites in the city, contributing to improvement of urban landscape ecology, reducing damages due to flood reduction, Which can be effectively processed.

Specifically, by applying the lane garden system according to the present invention to urban sites, it is possible to prevent urban floods such as lowlands, thereby reducing urban floods, and preventing flooding and sedimentation of nonpoint pollution such as roads, parking lots, roads, parks, industrial complexes, It is effective to reduce the non-point pollutant by installing it at the place where the substance is discharged. In addition, the advantages of less power and improvement of urban landscape ecology have the advantage of preventing fundamental ecosystem pollution and securing the safety of urban infrastructure. Rainwater can be reused in non-rainfall, There is an effect that can contribute.

Experimental example.

In order to investigate the effect of removing vegetative vegetation contaminants in the lane garden system of the present invention, a columnar acrylic column having a diameter of about 30 cm and a height of about 60 cm was used for a Leersia spp. Plant, a Cyperus spp. spp.) were planted with planting density of plants, bees are yellow (Lotus corniculatus var. japonicus Regel) , alveolar water Buttercup (Mimulus nepalensis var. japonica), 4 give up / 30 cm Western grass, respectively. The height of the vegetation soil was about 30 cm, and peatmoss, pearlite and general soil were mixed at a weight ratio of 1: 1: 1.

Until the seeds were sown and sprouted, only water was supplied, and pollutants such as nitrogen, phosphorus, and heavy metals discharged from the vegetation soil were discharged from the outflows formed in the lower part. When development began, the water was supplied to the water twice a week by mixing nitrogen (15 ppm), phosphorus (5 ppm) and heavy metals (5 ppm), and the removal rate (%) of nitrogen, phosphorus and heavy metals As shown in Fig. Nitrogen and phosphorus were measured by absorbance and heavy metals were measured by ICP (inductively coupled plasma).

As a result, the removal rates of nitrogen, phosphorus, and heavy metals in Siberian plant, Lycia plant, bee yellow lily, and lily of the Aspergillus were significantly higher than those of American grass, It was confirmed that the pollutants contained in the rainwater can be filtered out by effectively removing the nutrients.

Having described specific portions of the present invention in detail, it will be apparent to those skilled in the art that this specific description is only a preferred embodiment and that the scope of the present invention is not limited thereby. It will be obvious. Accordingly, the actual scope of the present invention will be defined by the appended claims and their equivalents.

100: initial excellent pretreatment tank 200: vegetation part
300: Geo fiber 400: Penetration part
500: storage part 600: water level control part
700: outlet portion 11: refractory screen
12a: an excellent inflow pipe of the vegetation part 12b: an excellent inflow pipe of the penetration part
21: vegetation plant 22: vegetation soil
41: crushed stone layer 51; Prefabricated storage tank
52: landscape water pipe 5; home

Claims (14)

A vegetation section containing vegetation and vegetation soils;
A permeation part including a crushed stone layer and formed on the lower part of the vegetation part; And
And a reservoir portion including a prefabricated reservoir and formed at a lower portion of the permeation portion,
The vegetation plant includes Leissia spp. Plants and Cyperus spp. Plants,
Wherein the vegetated soil includes an excellent inflow pipe of a vegetation part into which rainwater flows,
Wherein the crushed stone layer includes an infiltration portion excellent inflow pipe into which rainwater flows.
The method according to claim 1,
The lane garden system includes an initial excellent pre-treatment tank formed by separating the vegetation part, the infiltration part and the storage part by the fractionation means, and an inlet port for an excellent vegetation-inflow port and an inflow port for an infiltration part are formed in an initial excellent- Rainfall inlet system and Rainfall system Rainfall system is supplied from the initial rainwater pre-treatment tank to the vegetation part and the infiltration part through the rainfall inflow pipe.
The method according to claim 1,
Wherein the lane garden system further comprises a water level adjusting portion, wherein the water level adjusting portion is separated from the vegetation portion and the infiltration portion by the fractionation means and connected to the storage portion.
The method of claim 3,
Wherein the water level adjusting portion is connected to an outlet portion through which rainwater is discharged.
The method according to claim 1,
Wherein the vegetation plant further comprises Lotus corniculatus var. Japonicus Regel and Mimulus nepalensis var. Japonica .
The method according to claim 1,
Wherein the vegetated soil comprises sand, silt and clay at a weight ratio of 6 to 8: 1 to 3: 1 to 2.
The method according to claim 1,
Wherein the vegetation soil has one or more of the following characteristics.
(a) pH 7.8 + 0.5;
(b) Electrical conductivity (EC) 0.61 ± 0.05 mS / cm;
(c) Organic matter content 4.35 ± 0.04%; And
(d) Cation Exchange Capacity (CEC) 37.54 ± 0.7 meq / 100g.
The method according to claim 1,
Wherein the high-density polyethylene (HDPE) material is an excellent inflow pipe for the vegetation part and an excellent inflow pipe for the penetration part.
The method according to claim 1,
Wherein the vegetation part well inflow pipe and the infiltration part good inflow pipe have an average diameter of 40 mm to 80 mm.
The method according to claim 1,
Wherein the vegetation part well inflow conduit is connected to a landscape water pipe through which rainwater stored in the storage part is transferred to the vegetation soil.
The method according to claim 1,
Wherein the lane garden system further comprises a geotextile between the vegetation section and the infiltration section.
The method according to claim 1,
Wherein the crushed stone layer comprises at least one waste material selected from the group consisting of charcoal, waste lumber and briquettes along with gravel.
The method according to claim 1,
Wherein said prefabricated reservoir has a porosity of at least 90%.
The method according to claim 1,
Wherein the prefabricated reservoir is made of polypropylene (PP) plastic.

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