CN102992486A

CN102992486A - Small ecological corridor for intercepting and purifying runoff pollutants in rivers

Info

Publication number: CN102992486A
Application number: CN2012103777963A
Authority: CN
Inventors: 刘福兴; 宋祥甫; 邹国燕; 付子轼; 刘娅琴; 王金庆
Original assignee: Shanghai Academy of Agricultural Sciences
Current assignee: Shanghai Academy of Agricultural Sciences
Priority date: 2012-09-28
Filing date: 2012-09-28
Publication date: 2013-03-27

Abstract

The invention provides a small ecological corridor for blocking and purifying runoff pollutants in rivers, which is composed of an intercepting and collecting system and a purifying system, wherein the intercepting and collecting system consists of an intercepting and collecting corridor frame (1) and intercepting and collecting filling matrix (2); and the purifying system consists of a purifying matrix (3) and purifying plants (4). The ecological corridor can effectively intercept and purify the runoff pollutants in the rivers, particularly in catchment areas of rural rivers, and besides, the used materials have no any ecological risk; and the small ecological corridor is simple in design, low in cost and low in running and maintaining cost.

Description

A kind of small-sized ecology corridor that purifies the river Runoff contaminants for retardance

Technical field

The present invention relates to environmental protection technical field, relate in particular to a kind of small-sized ecology corridor that purifies the river Runoff contaminants for retardance.

Background technology

Draining in the main originates from life of the water pollutant in river course and all kinds of production process and rainfall runoff two large classes.Wherein, living is easy to artificial adjustment and purification relatively with the draining in all kinds of production processes, and in the Rural areas, and rainfall runoff is then more difficult to be regulation and control, generally all enters river, unordered discharging nearby.Current, adopt the ecological canal system of inside, farmland or the wetland purification system of bank band to administer for channel flow pollution in rural area is general, although can partly tackling, the ecological canal technology purifies the inner Runoff contaminants in farmland, but large at instantaneous delivery, when Pollutant levels are higher, because it can't satisfy the suitable residence time, causes processing efficiency lower; Wetland purification is by in the larger zone of bank band, river course, make up undercurrent or surface stream wetland, by the layout of making rational planning for to these section watershed irrigation canals and ditches, runoff is imported in the wet land system, can continue interception and high-efficient purification to Runoff contaminants in the water catchment area, coastal belt, but because the structure of wet land system needs larger land area, and maintenance management is comparatively complicated, therefore can only and there be the zone that makes up the space to implement in the relatively large river course of scale, have limited the promotion and application of this technology.Simultaneously, above-mentioned technology is not dissolved into river course self in the treatment system when processing river course charge for remittance runoff pollution, only tackles and purifies with regard to runoff, although sometimes can obtain higher processing efficiency, processing cost is also higher.

Summary of the invention

The invention provides and a kind ofly purify the small-sized ecology corridor of river Runoff contaminants for retardance, it is comprised of with gathering system and pollutant purification system the runoff obstruction, and wherein runoff is stopped and gathering system is comprised of gallery framework and filling substrate; Purification system is comprised of decontamination substrate and plant.

Wherein said small-sized ecology corridor length and channel length are basically identical, and configuration of surface is parallel with the river course, and section width is at 0.50 ~ 1.15m, and the degree of depth is at 0.30 ~ 0.60m;

Wherein the runoff obstruction is formed by timber, plastic sheet and gabion box structure with the gallery framework of gathering system; Filling substrate is shredded coconut meat or palm silk;

Wherein the decontamination substrate of purification system is comprised of shredded coconut meat or palm silk, and the above lays gravel; Plant is the type plant (such as Bermuda grass) that crawls.

The small-sized ecology corridor that purifies the river Runoff contaminants for retardance of the present invention, can effectively tackle and purify the especially runoff pollution of water catchment area, river course, rural area of river course, can combine together with river course bank band simultaneously, realize the combination of ecological pollution treatment and restoration of the ecosystem.

The small-sized ecology corridor that purifies the river Runoff contaminants for retardance of the present invention is when being used for interception and purifying runoff pollution, gallery main body framework is structured on the river course maximum water level, distance is controlled at 2.0 ~ 4.0m between the two, and the gallery configuration of surface is curved with the river course, straight consistent, parallel laying.Runoff is stopped with the gathering system gallery after excavating on request, and interior lateral frame is inserted plastic sheet, and inboard plastic sheet is connected with gabion box, gabion box is made the U font in advance, according to local soil condition, at a certain distance piling is fixing, inserts shredded coconut meat or palm silk between the interior outside; Purification system is to lay certain thickness shredded coconut meat or palm silk in the gallery bottom, the above lays certain thickness gravel, in the gravel slit, adopt the mode of soilless culture to transplant plant, plant is adopted the type plant that crawls, selection principle be drought resisting, waterlogging-resistant, biomass is low, for example Bermuda grass or Manila are careless, the purification system sectional arranges that segments can be determined according to conditions such as water catchment areas, but every section purification system length is not less than 8.0m.Wherein obstruction and gathering system and purification system in use, both are separated from each other in space layout, runoff is successively by obstruction and gathering system and purification system, two system interactions realize that interception purifies the effect of Runoff contaminants jointly.

The mechanism of action for blocking the small-sized ecology corridor that purifies the river Runoff contaminants provided by the invention is: suspend and the larger characteristics of colloidal attitude pollutent proportion according to runoff, the dispersion or the concentrated runoff pollution that river course land-based area " vertically " are entered the river concentrate also " parallel " radiation to enter the river again, realize simultaneously the rough purification of pollutent in intercept process.The two-layer design of its interception and gathering system, can fully tackle and hold stagnant runoff, and the laying by shredded coconut meat or palm silk, change flow shape, filter the suspended matter in the runoff, increased the hydraulic detention time of runoff before entering the river, under the condition that changeable and residence time prolongs in the pollutants transfer path, utilize the filteration of decontamination substrate in the purification system, adsorption is removed pollutent, simultaneously, the step-by-step design of purification system, the propagation of aerobic microbiological in the interior water body of gallery and the optimization of biological community structure have been promoted, improved the Degradation of microorganism, the setting of plant not only can directly absorb pollutent, also promoted simultaneously the procreation of microorganism, therefore, the present invention is by changing the direction of a stream of water, be added to the hydraulic detention time before the river, and pass through hypothallus, edaphic filtration, absorption, the comprehensive actions such as plant absorbing utilization and microbiological deterioration realize interception and the purification to Runoff contaminants, simultaneously, and natural physical material, such as shredded coconut meat or palm silk, the organic assembling of gravel and gallery framework and design have ensured continuing of ecology corridor, steady running.On the whole, the present invention uses for reference the part mechanism of the technology such as ecological canal, artificial swamp and builds thinking, a kind of measure that the river course external source import pollutes that purifies of tackling is provided, can be in limited space, flow to by changing runoff, retardance purifying contaminated thing, gallery can effectively combine together with Channel slope after implementing, do not affect the ecologic structure of Riparian Zone, and finally become the important component part of river channel ecology system.

The invention has the advantages that: small-sized ecology corridor provided by the invention can realize interception and the purification to water catchment area, river course runoff pollution, and the while material therefor is without any ecological risk, and simplicity of design, and with low cost, operation expense is low.

The present invention is on the basis that considers the conditions such as river course, rural area periphery land use pattern, bank band form, from the river course and the integral body of watershed, use for reference the principle of ecological canal and artificial swamp and build thinking, a kind of easy runoff interception and control techniques are provided, this technology is not is not occupied the farmland, be need not special maintenance, construction and running cost are low, and can combine together with the bank band, become the linking link that regional runoff pollution is processed.

Description of drawings

Fig. 1. the section structure synoptic diagram of small-sized ecology corridor

Wherein:

1, gallery framework

2, filling substrate

3, decontamination substrate

4, plant

Embodiment

Embodiment 1

Fig. 1 is a kind of embodiment of the present invention, is by the gallery framework 1 of runoff obstruction with gathering system, the filling substrate 2 of obstruction and gathering system, and the decontamination substrate 3 of pollutant purification system, and plant 4 forms.

Gallery framework 1 and filling substrate are stopped and gathering system for 2 common compositions, are positioned at main body gallery both sides on the section structure, and the runoff inflow side is higher than opposite side 0.15m, and two portions width is 0.20m, and significant depth is 0.50m, and the gallery total length is 80m; Gallery framework 1 is followed successively by fixedly (the Taizhou plain Huangyan glad garden supplies factory customization of speaking of timber, plastic sheet from outside to inside, Taizhou of Zhejiang) and plastic gabion box (Wuxi Kuangwei Metal Products Co., Ltd., jiangsu wuxi), wherein plastic gabion box is converted into U-shaped according to depth requirements in advance, be lining between the plastic sheet, going to the bottom becomes the bottom of gallery purification system, and timber diameter 80mm moves towards interval 0.50m along gallery and arranges; Stopping with collecting filling substrate 2 is palm silk (the big Environmental Protection Technology Co., Ltd in sea, Ningbo City, Ningbo of Zhejiang), and depth of cracking closure is 0.50m, not compacting.

Decontamination substrate 3 and plant 4 form purification system, and step-by-step arrangement arranges 6 sections altogether, every segment length is 10m, be evenly arranged, middle dead band length is 4.0m, and decontamination substrate 3 is made of palm silk and gravel, palm silk (above the gabion box) is laid in the bottom, palm silk laying depth is 0.08m after the gravel compacting, upper laying gravel (the Shanghai bright stone material of speed company limited, Songjiang, Shanghai), gravel diameter is 60mm, and laying depth is 0.25m; Purifying plant 4 adopts Bermuda grass, 20 ~ 40 clumps/m ², plant root is embedded in the gravel bottom.

Claims

1. one kind is used for the small-sized ecology corridor that retardance purifies the river Runoff contaminants, it is characterized in that it is comprised of obstruction and gathering system and purification system, wherein obstruction is comprised of gallery framework (1) and filling substrate (2) with gathering system, and purification system is comprised of decontamination substrate (3) and plant (4).

2. retardance according to claim 1 purifies the small-sized ecology corridor into the river Runoff contaminants, it is characterized in that described gallery framework (1) is formed by timber, plastic sheet and gabion box structure; Filling substrate (2) is shredded coconut meat or palm silk.

3. purification system according to claim 1 is characterized in that decontamination substrate (3) is comprised of shredded coconut meat or palm silk, and gravel is laid on top.