CN105000748B - Typical agricultural non -point pollution thing " point-line-surface " comprehensively cuts control system - Google Patents

Typical agricultural non -point pollution thing " point-line-surface " comprehensively cuts control system Download PDF

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CN105000748B
CN105000748B CN201510218288.4A CN201510218288A CN105000748B CN 105000748 B CN105000748 B CN 105000748B CN 201510218288 A CN201510218288 A CN 201510218288A CN 105000748 B CN105000748 B CN 105000748B
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ditches
pond
ecological
canal
irrigation canals
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CN105000748A (en
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孙井梅
陈育超
张志钢
许丹宁
汤茵琪
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Water Utilities Technology Popularization Center Jinnan District Tianjin
Tianjin University
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Water Utilities Technology Popularization Center Jinnan District Tianjin
Tianjin University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

The present invention discloses a kind of typical case's agricultural non -point pollution thing " point-line-surface " and comprehensively cuts control system, it is provided with an irrigation canals and ditches between farmland, between fish pond or between farmland and fish pond, rainfall runoff is pooled to tap drain canal by an irrigation canals and ditches, again river course is entered by tap drain canal, be provided with flood storage ecological pond between tap drain canal and river course;In each irrigation canals and ditches mouth and flood storage ecological pond entrance, irrigation canals and ditches and river surface region respectively, be spaced or be staggeredly equipped with three-dimensional plant grid;Described irrigation canals and ditches are all ecological canal, in flood storage ecological pond and enter and be arranged in parallel floodway between the culvert of river;Flood storage ecological pond and whole river surface region are provided with solar energy aeration biological floating bed, are additionally provided with photochemical catalytic oxidation plate to remove persistent organic pollutants.The present invention is widely used in the improvement of various agricultural non -point pollution, and starts with from " point-line-surface " various pieces, cuts control from source, has both alleviated the waterlogging-resistant pressure of flood control, has processed the larger early-stage rainwater of pollutional load again.

Description

Typical agricultural non -point pollution thing " point-line-face " comprehensively cuts control system
Technical field
The present invention is to administer with regard to Farmland Flow Pollution thing, particularly to a kind of for typical agricultural non -point pollution thing Comprehensive section of control system.
Background technology
Widespread pollution from the overuse of fertilizers and pesticides in rural area is agricultural nonpoint source pollution, mainly includes Agricultural chemical pollution (chemical fertilizer, pesticide etc.), intensive Change the aspects such as plant's pollution, domestic sewage in rural areas pollution.Show according to national Pollutant source investigation data for the first time, main in China In pollutant discharge amount, COD, N, P that agricultural production (industry containing livestock culture, culture fishery and planting industry) is discharged etc. are mainly dirty Dye thing amount, has exceeded well over industry and life source, has become first of polluter.
In widespread pollution from the overuse of fertilizers and pesticides in rural area, the farmland face source based on farmland is due to material used for agriculture such as pesticide, chemical fertilizer, mulch films not Rationally and be excessively used, during precipitation or irrigation, pollutant are entered by agricultural surface runoff, agricultural drain and subsurface wastewater infiltration system Water body near entering, causes water pollution, the widespread pollution from the overuse of fertilizers and pesticides in rural area problem leading to becomes increasingly conspicuous, becomes water pollution, lake Fu Ying The main cause of fosterization, has badly influenced quality of water environment, the ecological environment health of China, has constrained China's economic society Sustainable development.Control to widespread pollution from the overuse of fertilizers and pesticides in rural area not only becomes the most important thing of water pollution control, also progressively becomes Modern Agriculture Industry and the key subjects of social sustainable development.
The at present Traditional Ecological measure of reply agricultural non -point pollution have wetland engineering technology, Riparian Buffer Zone control technology, Manually many pools technology etc., these measures all have obvious effect, but all also there is the restriction in some defects and the suitability.Main Problems with to be included:(1) situation in different croplands pollution of area source region is different, and the ecological control of use is also more numerous and diverse, Do not form unified effectively cutting and control thinking, lead to much areas to there is technology when selecting ecological intercepting measure uncomfortable Close, process the problems such as not up to standard, occupation of land is unreasonable;(2) do not have the overall situation forming " point-line-face " to cut control to see, interception measure is set When only embody a portion.Such as the source of farmland face, earliest source should be field enter irrigation canals and ditches point, a lot Ecological intercepting measure does not start to cut control from basic source;(3) do not think better of the sky of farmland face source runoff pollution Between output characteristic, intercept measure setting there is no specific aim.Runoff SS and TN (total nitrogen) of little watershed, TP (total phosphorus) have Well linear dependence, therefore, little watershed, should arrange nearby to cut the facilities such as ecological revetment based on dirt;Big charge for remittance Region, should arrange the facilities such as delaying basin based on ecological fall dirt, ecological canal;(4) to farmland face source runoff pollution Time output characteristic is held not, does not handle the early-stage rainwater relation waterlogging-resistant with flood control well.The pollutant such as SS, N, P are respectively provided with Certain first flush effects are it is therefore desirable to emphasis is processed, and often in the case of heavy rain, because safety problem, need to drain off floodwaters Based on flood discharge, therefore occur in that early-stage rainwater without the abundant situation processing directly discharge.
For solving problem above it is proposed that a kind of typical case's agricultural non -point pollution " point-line-face " comprehensively cuts control system.
Agricultural non -point pollution region generally includes the dissimilar boxed area such as farmland, fish pond, forest land, has ditch between region When canal, rainfall or irrigation, the water major part that these regions fail to accommodate is introduced into an irrigation canals and ditches, then imports tap drain canal, the most laggard River course near entering or lake.Therefore, there is certain typicality in agricultural non -point pollution region so that design is a kind of general Pollution control system is possibly realized.
Rainfall is also the key factor of impact agricultural non -point pollution.In water yield feature, heavy or torrential rain is due to short time internal diameter Streamflow is excessive, and overriding concern flood control is waterlogging-resistant, needs to set up flood storage facility or carries out flood discharge;On water quality characteristicses, rainfall is to soil The impact of earth brings the pollutant such as SS, nitrogen, phosphorus into runoff, and is directly entered river water body with runoff, and rainfall is to pollutant There are obvious first flush effects, the output of the pollutant such as SS, nitrogen, phosphorus concentrates on the rainfall initial stage.Therefore, it is necessary to comprehensive examine Consider the storm runoff water yield, water quality output characteristic, to design the control measure that cuts accordingly.
Content of the invention
The purpose of the present invention, is not form unified effectively comprehensive section of control for most of agricultural non -point pollution region at present Measure, and do not handle early-stage rainwater and waterlogging-resistant relation of controlling flood well, the time and space feature that pollutant export is held not Present situation, propose a kind of typical case's agricultural non -point pollution " point-line-face " and comprehensively cut control system, different agricultures can be widely used in Field pollution of area source region, also solves the problem that above-mentioned Problems Existing.
This comprehensively cuts in control technology, " point " corresponding be 1. farmland, fish pond etc. enter irrigation canals and ditches point;That 2. props up irrigation canals and ditches enters tap drain Canal point;3. tap drain canal enter heavy rain flood storage ecological pond point;4. enter river mouth." line " is corresponding to be 1. to prop up irrigation canals and ditches;2. tap drain canal." face " Corresponding is the heavy rain flood storage ecological pond that 1. tap drain canal end connects;2. river mouth river surface region and whole river arterial highway river surface area are entered Domain.Corresponding " point ", " line ", " face " three different parts, have several different processing units, these units can basis respectively Field condition and need to be arranged in different positions.These processing units have targetedly played different cutting in different positions Control acts on, and to form unified effectively comprehensive cutting and to control.
The present invention is achieved by following technical solution.
A kind of typical case's agricultural non -point pollution thing " point-line-face " comprehensively cuts control system, including farmland, fish pond, irrigation canals and ditches and river Road is it is characterised in that between described farmland and farmland, be provided with Zhigou between fish pond and fish pond or farmland and fish pond Canal 2, rainfall runoff passes through farmland and the irrigation canals and ditches mouth in fish pond enters an irrigation canals and ditches 2, then is pooled to tap drain canal 1 by an irrigation canals and ditches 2 respectively; Be provided with flood storage ecological pond 3 between the end of tap drain canal 1 and river course 4, be provided with the entrance river course 4 of flood storage ecological pond 3 into River culvert 5, the porch entering river culvert 5 is provided with clough;
Enter an irrigation canals and ditches mouth in farmland, irrigation canals and ditches mouth become owner of by irrigation canals and ditches, tap drain canal enters flood storage ecological pond mouth and is respectively arranged with solid Plant grid 6;And in irrigation canals and ditches with tap drain canal arranged for interval three-dimensional plant grid 6, the river surface region outside entering river culvert 5 Interior interlaced arrangement three-dimensional plant grid 6;
Described three-dimensional plant grid 6 is the ship type stereochemical structure of a hollow trapezoid shape, and its top is provided with rectangle upper side frame, its Bottom is provided with rectangle boundary frame area, is connected by perpendicular doorjamb between upper side frame and boundary frame area, and the long side of upper side frame is more than boundary frame area The long side of correspondence;Three-dimensional plant grid be internally provided with enough soft wickers;
Described tap drain canal 1 and an irrigation canals and ditches 2 are all ecological canal, and the cross section of this ecological canal is inverted trapezoidal, and canal wall is Middle part right hexagonal steel-concrete brick with holes pours and forms, and canal bottom is laid by rubble or cobble, and Qu Bi and canal bottom are filled Mold, mold is planted emergent aquactic plant;
Described flood storage ecological pond 3 is aerobic-simultaneous oxygen the ecology pond systems, the surrounding of this aerobic-simultaneous oxygen the ecology pond systems Bank slope and bottom are provided with impermeable building block, and the central authorities of impermeable building block arrange fluted and planting plants;This system passes through two bafflings Ecological pond is divided into aerobic zone 7, floating bed area 8 and mattress area 9, floating bed area 8 and mattress area 9 composition aerobic area, three regions by wall For staged, there is different water depth;The water surface in floating bed area is provided with aeration biological floating bed 11, plants emergent aquactic plant above it;Heavy The ecological mattress 12 of setting in the water in bed area, plants submerged plant above it;The porch of flood storage ecological pond 3 is provided with check gate And three-dimensional plant grid 6, the exit of flood storage ecological pond 3 is also equipped with check gate;Restraining in the porch of flood storage ecological pond 3 Before lock and enter to be arranged in parallel floodway 10 between river culvert 5, to draw in time when exceeding flood storage ecological pond capacity of flood storage Walk flood peak;The porch of this floodway 10 is also equipped with check gate and three-dimensional plant grid 6;
In flood storage ecological pond, that the river surface region that enters river culvert and whole river surface region are provided with solar energy aeration is ecological floating Bed 11;It is provided with solar panels on solar energy aeration is biological floating bed, the aerator for floating bed provides power;It is additionally provided with light Catalysis oxidation plate is to remove persistent organic pollutants.
The emergent aquactic plant of described ecological canal is water spinach, Herba Oenanthes Javanicae, the emergent aquactic plant of Caulis Zizaniae caduciflorae class.
Described ecological canal can placement part Bellamya quadrata, Carassius auratuss, the shallow water aquatic products of Misgurni anguillicaudati class.
Aerobic-simultaneous oxygen the ecology pond systems of described flood storage ecological pond 3, its aerobic zone 7 mean depth is 0.8m, floating bed area 8 Mean depth is 1.2m, and mattress area 9 mean depth is 1.5m.
Compared with the present invention cuts control measure with traditional agricultural non -point pollution, there is provided one kind is widely used in various farmlands The synthesis of pollution of area source cuts control system, and starts with from " point-line-face " various pieces, targetedly devises different cutting and controls Facility, has accomplished to cut control from source;In addition, for the space output characteristic of agricultural non -point pollution, for little watershed, nearby Setting to cut the facility such as three-dimensional plant grid based on dirt, for big watershed, ecological ditch based on ecological fall dirt for the setting The facilities such as canal, ecological pond;Finally, it is also directed to the time output characteristic in farmland face source, is provided with flood storage ecological pond, both alleviated anti- The waterlogging-resistant pressure of flood, has processed the larger early-stage rainwater of pollutional load again.
Brief description
Fig. 1 is the structural representation that the present invention a kind of typical case agricultural non -point pollution thing " point-line-face " comprehensively cuts control system;
Fig. 2 three-dimensional plant grid structural representation;
Fig. 3 be ecological canal structural representation;
Fig. 4 is the structural representation of flood storage ecological pond;
Fig. 5 is biological floating bed structural representation.
The reference of the present invention is as follows.
12, tap drain canal irrigation canals and ditches
3 flood storage ecological pond 4 river course
5 enter river culvert 6 three-dimensional plant grid
7 aerobic zone 8 floating bed area
9 mattress area 10 floodway
The biological floating bed 12 ecological mattress of 11 aerations
Specific embodiment
With reference to being embodied as case, the present invention is further elaborated, and this embodiment is merely to illustrate the present invention, and Do not limit the range of the present invention.
Specific embodiment is a piece of farmland region, is made up of some pieces of rice terraces, irrigation canals and ditches, and branch canal imports tap drain canal, tap drain Canal is connected with entering river culvert.After the main pollution of area source in this area comes from rainfall, rainfall runoff carry SS in rice terrace, N, The pollutant such as P import irrigation canals and ditches and a tap drain canal, and import river course (referring to Fig. 1) eventually through entering river culvert.
Comprehensively cut this pollution of area source of control system using area source pollutants " point-line-face ", first rice terrace enter irrigation canals and ditches mouth, Branch canal is become owner of irrigation canals and ditches mouth and is entered the positions such as river culvert and be respectively provided with three-dimensional plant grid, and interval 50m sets in tap drain canal Put three-dimensional plant grid.When rainfall is carried out, water in rice terrace is through the interception of three-dimensional plant grid, particulate form pollutant such as SS Fully retained, cut simultaneously and leave N, the P being attached on SS.Due to the detention effect of three-dimensional plant grid, flow rate of water flow subtracts Slowly, the time in charge for remittance remittance river course is extended, and the hydraulic detention time in irrigation canals and ditches increases, the willow stem in three-dimensional plant grid Leaf is degraded to the dissolved N, P.Three-dimensional plant grid serves drop effect to current, increased oxygen in water concentration, Also improve treatment effect.Setting three-dimensional plant grid, improves the soil erosion under rain fall and pollution of area source, takes simultaneously Easily, cost is relatively low for material, makes simple, mobile, dismounting, reclaim more convenient, especially suitable in rural area.Setting is three-dimensional to plant After thing grid, the clearance of SS is 15~25%, TP clearance up to 15~25% up to 60~75%, TN clearance.
Above-mentioned three-dimensional plant grid by diameter about 10cm thick willow branch with the thin wire fourth of the twelve Earthly Branches become hollow ship type structure (see Fig. 2), enough soft wickers are internally filled in.The actual size of grid determines according to the size of the position placed and irrigation canals and ditches, When placing in irrigation canals and ditches, height of grid is slightly above wet season irrigation canals and ditches height of water level.The reference dimension that farmland enters irrigation canals and ditches mouth grid is: Long 50cm, wide 40cm, high 40cm;In irrigation canals and ditches, the reference dimension of grid is:Long 100cm, wide 60cm, high 60cm;Enter at the culvert of river The reference dimension of grid is:Long 200cm, wide 120cm, high 120cm.
Three-dimensional plant grid may be arranged at each position corresponding to " point ", and that is, farmland enters irrigation canals and ditches mouth, irrigation canals and ditches become owner of by irrigation canals and ditches Mouth, tap drain canal enter flood storage ecological pond mouth, separately arranged for interval in irrigation canals and ditches, and are entering river mouth river surface region interlaced arrangement.
This three-dimensional plant grid has the characteristics that:
(1) particulate matter such as this three-dimensional plant grid SS obvious to first flush effects has preferable retention and makees With having retained the nitrogen being attached on SS, phosphorus simultaneously.
(2) except trapped particles state pollutant, wicker and willow branch are respectively provided with stronger energy for growth in water, its leaf Piece and root system have certain removal ability to the nitrogen of the dissolved, phosphorus.
(3) thick wicker is irregular, and three-dimensional plant grid framework has natural space, and internal soft wicker also has natural Space, has certain resistance to water-flow but does not interfere with the needs drainning off floodwaters.Therefore this three-dimensional plant grid has alleviation local water The effect of flow velocity degree, increases the process time of ecological canal and subsequent treatment measure.
(4) three-dimensional plant height of grid sets according to wet season irrigation canals and ditches height of water level, can cross flow go over when the water yield is larger, Also drop on a small scale can be formed, increase oxygen-enriched effect.
(5) this three-dimensional plant grid is drawn materials easily, and cost is relatively low, makes simple, mobile, dismounting, reclaim more convenient.
In addition, original tap drain canal is reconstructed into ecological canal, during discharge series, current have certain in ecological canal The water conservancy time of staying, the plant and animal in irrigation canals and ditches has carried out sufficient degraded to pollutant such as N, P.Simultaneously Concrete brick and The laying of cobble decreases water and soil and washes away.The tap drain canal of this ecological canal is 15~30%, TN clearance to the clearance of SS It is 20~35% for 25~40%, TP clearance.
As shown in figure 3, cross section is inverted trapezoidal, canal wall is middle part regular hexagon coagulation with holes to improved ecological canal Cob brick block pours and forms, and canal bottom is laid by rubble or cobble, Qu Bi and canal bottom filling mold, plantation water spinach, Herba Oenanthes Javanicae, The emergent aquactic plants such as Caulis Zizaniae caduciflorae, in addition can the shallow water aquatic products such as placement part Bellamya quadrata, Carassius auratuss, Misgurni anguillicaudati.
Ecological canal has the characteristics that:
(1) canal wall is laid with Concrete brick with holes, can not only reduce current and trench sidewall is washed away, and can ensure The matter energy exchange of trench sidewall both sides, ecological canal side wall has a large amount of holes, is conducive to Crop diversity to grow, coagulation Hole in the middle part of cob brick block has the good performance such as ventilative, permeable, permeates plant desired nutritional, adapts to green plantss growth, can Carry out vegetation operation, there is environmental protection, improve the function of ecological condition.
(2) the ditch wetland ecosystem being made up of emergent aquactic plant, shallow water aquatic products etc., to the silt in agricultural run-off, Nitrogen, phosphorus have preferable rejection effect.
(3) the shallow water aquatic products such as Bellamya quadrata, Carassius auratuss, Misgurni anguillicaudati are parts for wetlands ecosystems, and their addition is conducive to Stablizing of ditch wetland ecosystem, promotes the purification of irrigation canals and ditches draining pollutant
(4) nutrient substance such as nitrogen, phosphorus promotes emergent aquactic plant and the growth of shallow water aquatic products, there is provided certain agriculture, fishing Product, after the harvesting of plant also avoids plant decay, pollutant return water body.
(5) in ecological canal each 50-100m about one three-dimensional plant grid of setting, slow down water velocity, increase The hydraulic detention time of ecological canal, and form drop, increased dissolved oxygen concentration, improve treatment effect.
Secondly, it is to be provided with flood storage ecological pond, that is, aerobic-simultaneous oxygen the ecology pond systems (as shown in Figure 4) in tap drain canal end. Its surrounding bank slope and bottom are provided with impermeable building block, and the central authorities of impermeable building block arrange fluted and planting plants;By two bafflings Ecological pond is divided into aerobic zone, floating bed area and mattress area by wall, and floating bed area becomes aerobic area with mattress district's groups, and three regions are ladder Formula, has different water depth, and aerobic zone 7 mean depth is 0.8m, and floating bed area 8 mean depth is 1.2m, and mattress area 9 mean depth is 1.5m;It is biological floating bed that the water surface in floating bed area is provided with aeration, plants emergent aquactic plant above it;It is ecological heavy to arrange in the water in mattress area Bed, plants submerged plant above it.At the rainfall initial stage, play capacity of flood storage, it is to avoid excessively have not enough time to treated during heavy rain The higher early-stage rainwater of pollution level is directly entered river course.If rain time is longer, rainfall is larger, then wait to store full early-stage rainwater Afterwards, open the floodway leading directly to into river culvert mouth, less for pollution level later stage rainwater is directly discharged into river course.In ecological pond Water can be discharged into river course again after processing some skies or carry out farmland recharge.Flood storage ecological pond also has attractive in appearance, floor space The high feature of little, treatment effeciency, using deflected current wall segmentation pool body thus increased hydraulic detention time, three subregions can increase Nitrogen, phosphorus treatment effeciency, improve ecological pond stability and capacity of resisting impact load, using biological floating bed and ecological mattress compound mode Improve plant total amount, improve Pollutant Treatment ability further, by the plant in reasonable disposition ecological pond, animal, increase life The state pool is attractive in appearance and recreational, sets up the complex ecological pool system of biological, chemistry integration aquatic animals and plants.Single flood storage is ecological The pool to the removal ability of TN up to 15~30%, to the clearance of TP up to 15~30%.
This flood storage ecological pond has the characteristics that:
(1) the maximum feature of flood storage ecological pond is can flexibly to tackle different rain fall.At the rainfall initial stage, play flood storage energy Power, it is to avoid excessively have not enough time to the higher early-stage rainwater of treated pollution level during heavy rain and be directly entered river course.If rainfall Time is longer, and rainfall is larger, then, after storing full early-stage rainwater, open the floodway leading directly to into river culvert mouth, by pollution level relatively Little later stage rainwater is directly discharged into river course.Water in ecological pond can be discharged into river course again after processing some skies or carry out farmland Recharge.
(2) this flood storage ecological pond has the characteristics that attractive in appearance, floor space is little, treatment effeciency is high, splits the pool using deflected current wall Thus increased hydraulic detention time, three subregions can increase nitrogen, phosphorus treatment effeciency to body, improves ecological pond stability and anti-impact Hit load-bearing capacity, plant total amount is improved using biological floating bed and ecological mattress compound mode, improve Pollutant Treatment energy further Power, by the plant in reasonable disposition ecological pond, animal, increase ecological pond is attractive in appearance and recreational, sets up biological, chemistry integration Aquatic animals and plants complex ecological pool system.
Finally, in flood storage ecological pond, the river surface region and the whole river surface region arrangement aeration that enter river mouth are biological floating bed.? Increased solar panels, the aerator for floating bed provides power, has in addition attempted visible ray on the basis of Traditional Ecological floating bed The design of catalysis oxidation, removes persistent organic pollutants (referring to Fig. 5).
Biological floating bed have the characteristics that:
(1) flexible arrangement, can enter river mouth river surface region and whole Haihe River river surface region flexible arrangement as needed, river Mouth region domain has agricultural non -point pollution thing to import, and organic concentration is higher, is conducive to the growth of floating bed plant and microorganism.
(2) solar panels provide the aerator of power to increased oxygen in water.
(3) visible light catalytic oxidation technology can remove hardly degraded organic substance.
The synthesis of the present invention cuts control system, starts with from " point-line-face " various pieces, targetedly devises different Cut control facility, accomplished to cut control from source;In addition, for the space output characteristic of agricultural non -point pollution, for little watershed, Arrange to cut the facility such as three-dimensional plant grid based on dirt nearby, for big watershed, life based on ecological fall dirt for the setting The facilities such as state irrigation canals and ditches, ecological pond;Finally, it is also directed to the time output characteristic in farmland face source, be provided with flood storage ecological pond, both alleviated The waterlogging-resistant pressure of flood control, has processed the larger early-stage rainwater of pollutional load again.This synthesis section control system can to the clearance of SS Reach 75~80%, the clearance removing TN up to 30~45%, to the clearance of TP up to 35~40%.

Claims (4)

1. typical agricultural non -point pollution thing " point-line-face " comprehensively cuts control system, and including farmland, fish pond, irrigation canals and ditches and river course, it is special Levy and be, between described farmland and farmland, between fish pond and fish pond or farmland and fish pond, be provided with an irrigation canals and ditches (2), Rainfall runoff passes through farmland and the irrigation canals and ditches mouth in fish pond enters an irrigation canals and ditches (2), then is pooled to tap drain canal by an irrigation canals and ditches (2) respectively (1);It is provided with flood storage ecological pond (3), the entrance river course of flood storage ecological pond (3) between the end of tap drain canal (1) and river course (4) (4) place is provided with into river culvert (5), and the porch entering river culvert (5) is provided with clough;
Enter an irrigation canals and ditches mouth in farmland, irrigation canals and ditches mouth become owner of by irrigation canals and ditches, tap drain canal enters flood storage ecological pond mouth and is respectively arranged with three-dimensional plant Grid (6);And in irrigation canals and ditches with tap drain canal arranged for interval three-dimensional plant grid (6), the river surface area outside entering river culvert (5) Interlaced arrangement three-dimensional plant grid (6) in domain;
Described three-dimensional plant grid (6) is the ship type stereochemical structure of a hollow trapezoid shape, and its top is provided with rectangle upper side frame, under it Portion is provided with rectangle boundary frame area, is connected by perpendicular doorjamb between upper side frame and boundary frame area, and the long side of upper side frame is more than boundary frame area Corresponding long side;Three-dimensional plant grid be internally provided with enough soft wickers;
Described tap drain canal (1) and an irrigation canals and ditches (2) are all ecological canal, and the cross section of this ecological canal is inverted trapezoidal, and canal wall is Middle part right hexagonal steel-concrete brick with holes pours and forms, and canal bottom is laid by rubble or cobble, and Qu Bi and canal bottom are filled Mold, mold is planted emergent aquactic plant;
Described flood storage ecological pond (3) is aerobic-simultaneous oxygen the ecology pond systems, the surrounding bank of this aerobic-simultaneous oxygen the ecology pond systems Slope and bottom are provided with impermeable building block, and the central authorities of impermeable building block arrange fluted and planting plants;This system passes through two deflected current walls Ecological pond is divided into aerobic zone (7), floating bed area (8) and mattress area (9), floating bed area (8) and mattress area (9) form aerobic area, Three regions are staged, have different water depth;The water surface in floating bed area is provided with aeration biological floating bed (11), and plantation above it is endured Water plant;Ecological mattress (12) is set in the water in mattress area, above it, plants submerged plant;Entrance in flood storage ecological pond (3) Place is provided with check gate and three-dimensional plant grid (6), and the exit of flood storage ecological pond (3) is also equipped with check gate;In flood storage life Before the check gate of porch on the state pool (3) and enter to be arranged in parallel floodway (10) between river culvert (5), to exceed storage Timely carrying-off flood peak during big vast ecological pond capacity of flood storage;The porch of this floodway (10) is also equipped with check gate and three-dimensional plant lattice Grid (6);
In flood storage ecological pond, that the river surface region that enters river culvert and whole river surface region are provided with solar energy aeration is biological floating bed (11);It is provided with solar panels on solar energy aeration is biological floating bed, the aerator for floating bed provides power;It is additionally provided with light Catalysis oxidation plate is to remove persistent organic pollutants.
2. typical case's agricultural non -point pollution thing " point-line-face " according to claim 1 comprehensively cut control system it is characterised in that The emergent aquactic plant of described ecological canal is water spinach, Herba Oenanthes Javanicae, the emergent aquactic plant of Caulis Zizaniae caduciflorae class.
3. typical case's agricultural non -point pollution thing " point-line-face " according to claim 1 comprehensively cut control system it is characterised in that Described ecological canal can placement part Bellamya quadrata, Carassius auratuss, the shallow water aquatic products of Misgurni anguillicaudati class.
4. typical case's agricultural non -point pollution thing " point-line-face " according to claim 1 comprehensively cut control system it is characterised in that Aerobic-simultaneous oxygen the ecology pond systems of described flood storage ecological pond (3), its aerobic zone (7) mean depth is 0.8m, and floating bed area (8) put down All the depth of water is 1.2m, and mattress area (9) mean depth is 1.5m.
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