CN104429529B - A kind of construction method of buffer area ecology Riparian zone - Google Patents

A kind of construction method of buffer area ecology Riparian zone Download PDF

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CN104429529B
CN104429529B CN201410723661.7A CN201410723661A CN104429529B CN 104429529 B CN104429529 B CN 104429529B CN 201410723661 A CN201410723661 A CN 201410723661A CN 104429529 B CN104429529 B CN 104429529B
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pool
layer
plant
gabion
riparian zone
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CN104429529A (en
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孙荣
李修明
邓伟琼
姚敏峰
颜文涛
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Chongqing University
Huaqiao University
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Chongqing University
Huaqiao University
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01GHORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G22/00Cultivation of specific crops or plants not otherwise provided for
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B3/00Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/02Stream regulation, e.g. breaking up subaqueous rock, cleaning the beds of waterways, directing the water flow
    • 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/11Hard structures, e.g. dams, dykes or breakwaters
    • 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/40Protecting water resources
    • Y02A20/402River restoration
    • 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
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention discloses the construction method of a kind of gentle slope local area ecological Riparian zone, the method includes gabion+low level pool+many pools+delay canal structure.Its concrete steps: (1) gabion band builds: meet river ordinary water level and 2 years one and build gabion between flood level, gabion gap plantation emergent aquactic plant;(2) the low level pool builds: met flood level at 2 years one and builds less than gabion band 20cm and the low lying areas of Duo Tang pool base 20cm between chance flood level for 20 years one;(3) many pools system: build two row's water-locking effect in the middle of region, the low level pool, carry out substrate transformation, dense planting submerged plant in the pool, pool base and pool week plantation emergent aquactic plant;(4) it is detained canal: met along 20 years one to build outside flood level and be detained canal.The present invention effectively solves the ecological problems such as pollution of area source serious, view is poor, bio-diversity reduction, the soil erosion that region, gentle slope, river faces, and recovery and reconstruction for falling zone provide feasible and effective restoration of the ecosystem measure.

Description

A kind of construction method of buffer area ecology Riparian zone
Technical field
The invention belongs to Ecological Restoration Works technical field, the optimization being specifically related to a kind of buffer area ecology Riparian zone builds mould Formula, is particularly suitable for degeneration Riparian zone ecosystem restoration and reconstruction.Reducing with biological mode of this patent comprehensive utilization physics Flow through the rainwash flow velocity of Riparian zone, cut down pollutant and recover bio-diversity to a certain extent, for degeneration Riparian zone Ecological recovery provides technical support.
Background technology
Riparian ecosystem is contact land and the tie of aquatic two big class ecosystems, and high for land and rudimentary plant are synthesized by it Organic substance, rock decay thing, soil product and terrestrial ecosystems in convert material continually enter river, become The important sources of the nutrient substance of river ecosystem.Start till now from the seventies, about the concept on riverbank successively have broad sense and Narrow sense two kinds.Referring broadly to the phytobiocoenose directly affected by current and growing environment, the many degree of the composition of its plant population, kind And equivalent neighboring area, microhabitat is significantly different;Refer to from river-intersection both sides, land in the narrow sense, until the ground that river impact disappears Band, the Riparian Zone of most research indications is the Riparian Zone of narrow sense.
Increasing recently as population, industrialization progress and the development of society, the river ecosystem including Riparian Zone is subject to The interference of mankind's activity and there is serious degradation.The thing followed be degraded ecosystem recovery with recover ecological international, Domestic development, comparatively speaking, China is the weakest to Riparian Zone and degraded ecosystem reconstruction theory thereof and practical studies.Though The most in recent years, the river ecological harnessing project as representative such as river, Shanghai river regulation, Three Gorges Reservoir improvement is turned with Beijing All carried out Riparian Zone considering, Eco-Design, but these rivers mostly are city river, and to substantial amounts of river outside of the city, Sections etc. lack research.On the other hand, until today, substantial amounts of river course is still cut-off, " three light ", " pleasing both parties " Carrying out process, cause river ecosystem to be degenerated, river pollution is serious, as the river of the main interceptor of rainwash pollutant Bank band disappears in a large number, in the case, the present invention is directed to the region of gentle gradient in Riparian Zone, the general gradient river less than 15 ° Bank band carries out novel ecological Riparian zone structure.
Summary of the invention
It is an object of the invention to provide the construction method of gentle slope, a kind of river local area ecological Riparian zone.
To achieve the above object, the present invention uses techniques below measure:
The forming types of a kind of gentle slope local area ecological Riparian zone, the steps include:
A. scope is built: river ecological Riparian zone of the present invention is met between flood between river ordinary water level and 20 years one, described General gradient < in region, gentle slope, river 15 °;
B. gentle slope belt environmental survey: the River Hydrology of gentle slope belt, topography and geomorphology, the gradient, width, 20 annual flood position area above The situations such as present status of land utilization carry out probe, determine that this ecology Riparian zone needs the plant species ecological characteristic of screening in building;
C. gabion band builds: the envirment factor determined according to early stage on-site investigation, and regional climate meteorological factor, determines gabion The kind of the plant of height, width and the middle ware kind of band and quantity, it is ensured that the localization of gabion band plant, variation;
D. the low level pool builds: in Project Areas, transformed by substrate and prepartion of land, and plantation Bermuda grass group or other deep root systems are resistance to Short-term water logging plant;
The most pools are built: in Project Areas, use the mode digging the pool, build small-sized pool, and transform at the bottom of the pool, and the heavy water of plantation is planted Thing and pool base and Tang Zhou emergent aquactic plant group;
F. be detained canal construction: Project Areas with around the most adjacent region, highland, dig canal and formed and be detained canal, filling gravel, and using Turf covers;
G. the management of ecological Riparian zone is safeguarded: solid refuse, silt etc. after ecology Riparian zone of the present invention especially needed concern flood To region, the low level pool, the covering in Duo Tang region or alluvial, need periodically to clear up, the most periodically to being grown in many pools and low level The vegetation in region, the pool, prevents it from decaying, rots to cause the secondary pollution of environment;Furthermore it is detained the pipe of canal after needing to add strong rainstorms Reason, preventing from being detained canal is that silt etc. covers, and needs the moment to note being detained the growing state of canal top Bermuda grass turf, prevents Braiding channel is exposed, turf is destroyed, and notices that turf aerial parts height not can exceed that 20cm, strengthens building maintenance etc..
Wherein, river ecological Riparian zone of the present invention is met between flood between river ordinary water level and 20 years one, described river General gradient < in region, gentle slope 15 °
Wherein, described gabion band is met between flood level river ordinary water level and 2 years one, by the block stone of particle diameter 0.15-0.5m Composition, the cobblestone of block stone central filler particle diameter 0.05-0.10m, this block stone and cobblestone by through 5% zinc-aluminium-rare-earth alloy Anticorrosion, tensile strength is more than 1500MPa, and unit are bearing strength is more than 35kN/m2,The steel mesh cage of diameter 2mm Parcel, cylinder mould aperture 10cm, gabion uses wire gauze area 25m2, volume 5m3, gabion buried depth 1.5m, protects width 2.0m。
Wherein, hole is planted the emergent aquactic plants, such as Herba Typhae, Dong Fangxiang such as Typhaceae, JUNCACEAE and grass family in the middle of gabion The emergent aquactic plant such as Pu, Medulla Junci, wild Medulla Junci, phragmites communis, Arundo donax;
Wherein, the low level pool was met flood levels and 20 years one and is met between flood level at 2 years one, the low level pool by aquifer+cover layer+ Vegetation and plantation soil layer+hand-stuff layer+barrier layer+gravel layer are constituted.Wherein aquifer, less than gabion band and Duo Tang pool base 15-20 cm;Cover layer, uses all standing such as bark or sawdust, thickness 5-8cm;Vegetation and plantation soil layer, use infiltration coefficient bigger Sandy soil (sand 60~85%, organic 5%~10%, clay 5%), planting soil thickness 25cm, plant deep root system Grass, such as Bermuda grass;Hand-stuff layer, the natural or artificial material that employing permeability is stronger, thick 30~50cm, May select and be not less than 10 with the plantation consistent sandy soil formed of soil layer or infiltration coefficient-5The slag of m/s or gravel;Barrier layer, Between packing layer and gravel layer, spread geotextiles or one layer of fine sand layer thick for 15cm, form barrier layer;Gravel layer, by diameter not Gravel composition more than 5cm, thickness 20-30cm.The grass of the deep root system of low level pool region all standing, such as Bermuda grass, After substrate layer is transformed, the mode of sowing is used to plant, after item area consolidation, according to 500g/20m2 Standard plantation.
Wherein, many pools are built, the Riparian zone that many pools were met between flood level and 20 years one chance flood levels at 2 years, the deep 50cm in the pool, Moment keeps depth of water 20cm, all standing submerged plant, including Hydrocharctaceae, Lentibulariaceae, the plant of Potamogetonaceae, such as Herba vallisneriae Spiralis, Downgrade Herba vallisneriae Spiralis, Herba Potamogetonis Pectinati, water caltrop, Hemerocallis citrina Baroni bladderwort etc.;Pool base, by submerged plant planting soil layer, covers 1-5cm's at the bottom of the pool Submerged plant planting soil;Hand-stuff layer, uses the stronger natural or artificial material of permeability, thick 30~50cm, optional with Sandy soil or infiltration coefficient that plantation soil layer unanimously forms are not less than 10-5The slag of m/s or gravel;Layer of sand, is to play resistance The auxiliary layer of gravel layer, thick 5-10cm is entered every soil particle;Gravel layer, the diameter gravel composition less than 5cm, thickness 20-30cm.Pool base and the plantation of the pool week JUNCACEAE, Cyperaceae, the plant of Typhaceae, such as Medulla Junci, wild Medulla Junci, stream The one or more combination of sedge, Herba Typhae, typha minima etc..
Wherein, the outside meeting flood level along ecological Riparian zone 20 years builds wide 0.5m, a deep 0.5m, fills gravel, overlying Deep root system grass, such as Bermuda grass turf, vegetation design height about 15cm, periodically gathers in.
The present invention solves the ecosystem that gentle slope, river Riparian Zone causes due to rainwash etc. that soil erosion, heavy rain wash away and breaks Bad, the problems such as bio-diversity lowers, surface water pollution.Utilizing works measure, plant measures matched combined effectively to slow Slope Riparian Zone carries out effective pollutant purification, interception and biodiversity restoration.One aspect of the present invention is alleviated by engineering measure Soil erosion;On the other hand cut down the pollutant by Riparian zone by plant measures, increase bio-diversity, thus become and change The important Ecological Measures of kind region, gentle slope Riparian Zone.
The material that the present invention selects, is easily acquisition, easily use, easy combined material, and the plant of selection with local Native species is Main, or there is the plant of efficient pollutant detergent power on a small quantity, adapt to home environment, survival rate is high, and cost performance is high, views and admires Property strong, the solid native ability many-side such as by force considers, and considers the economy of the final-period management maintenance after this technology has been applied Property and operation convenience.
The present invention is by the basis of laboratory simulation experiment, pilot scale place application experiment, according to Riparian Zone envirment factor, river Hydrologic condition etc., summary and induction goes out gentle slope, the river local area ecological Riparian zone forming types of complete set, build including delay canal, The combination technique of four kinds of engineering measures such as the shallow water pool, polysaccharide system, gabion, mutually coordinated collocation and become a set of rationally effective Ecological Riparian zone forming types.
The present invention compared with the prior art, has the following advantages and effect:
(1) it is detained canal, when the rainwash on highland, 20 years one chance flood level peripheries is after being detained canal, through irrigation canals and ditches itself Precipitation, infiltration, then the biodegradation filtering via the deep root system grass on top layer, intercepting and be detained in canal, to fall The flow velocity of low rainwash and reduction pollutant have remarkable result.
(2) the low level pool involved by this invention through substrate transform, surface Canis familiaris L. eye with and the biological agent of other deep root system plants, Can effectively reduce the rainwash flow velocity flowing through this region, accelerate to ooze under rainwash, remove particle, Organic substance and His poisonous and harmful substance;
(3) many pools system that this technology relates to, keeps lowest water level 20cm throughout the year, and transforms through substrate, on the one hand can There is provided stable water source for region, to ensure that regional vegetation will not be dead because of drought and water shortage throughout the year;On the other hand change through substrate Make and act on submerged plant, the filtration of emergent aquactic plant, absorption, sluggishness etc., effectively reduce and flow through the rainwater of this system and river Pollutant.Selected submerged plant, pool week emergent aquactic plant and wetland plant is this locality and has the cleanest dirty ability species, with Time there is suitable landscape effect, be the optimum vegetation arrangement of applicable one's respective area;
(4) gabion band involved by this technology builds, and uses local material, it is easy to acquisition, low price, simple for production, its Among this locality wetland and emergent aquactic plant, having significantly keeps the flood in check washes away, it is provided that the effect of Regional Biodiversity, also has There is significant landscape effect;
(5) gentle slope, the river local area ecological Riparian zone constructing technology of the present invention, based on river Riparian Zone natural conditions, the gradient is low, The feature that physical features is flat, constructs and meets Riparian zone system, the Riparian Zone forming types broken traditions so that it is both had significant dirt Dye thing clean-up effect, has again enhancing bio-diversity, improves the effect that Regional Landscape is aesthstic, and cheap, has reached true Positive is ecological harmonious, has ecology, Social and economic benef@..
The present invention is not only able to effectively reduce the rainwash flow velocity flowing through Riparian Zone, moreover it is possible to defaulted, cut down pollutant therein, The strongest water-retention, purifying contaminated thing ability are played in the low level pool through substrate transformation simultaneously, add the gabion band of Waterfront areas, Effectively river can be washed away by Riparian Zone.The structure of whole ecological Riparian zone not only has good pollutant fluxes and purifies energy Power, also has bio-diversity and the aesthetic of landscape effect of being significantly improved.
Detailed description of the invention
Volt cattle small stream overview:
Volt Niu Xi is positioned at Dadukou District, Chongqing City, total length 7.2km, drainage area 16.0km2, the slope of river 16.78 ‰, for many years Average discharge is 0.245m3/s.In basin by uneven planar water body (Young Pioneer reservoir, pocket ditch reservoir, yellow square rafter fort reservoir, Sun gulf reservoir) and width differ wire water body (small stream ditch, river) constitute.Owing to being arranged by littoral sanitary sewage, industrial wastewater The impact put, water quality impact is the most serious.2013, volt Niu Xishui domain-functionalities classification was cancelled in Dadukou District.
Situation before recovery:
One's respective area is positioned at society of Fu Niuxi citizen village 1, is a fillet trapezoid, the long 15m of minor face, long length of side 45m, the long 30m of hypotenuse, Area about 1000m2.Riverbank mean inclination 15 °, mud, flour sand Riparian Zone, herb coverage 90%, predominantly grass (85% Cover degree), Herba Erigerontis Canadensis (cover degree 3%), Radix Rumicis Crispi (5%) is main, have at edge, riverbank a small amount of Alternanthera philoxeroides and Herba Eichhorniae.
Forming types gabion+low level pool+many pools+delay canal structure, as follows:
(1) between low water level and ordinary water level, build gabion band, share building stones 150m3(being contained in gabion box), steel wire 1500 M (volume gabion), plants stream sedge 45m2, recruitment 40 man day.
(2) 300m is built in Project Areas2The low level pool.As follows with material: Bermuda grass plantation 300m2, gravel 75m3, carefully Sand 45m3, slag 75m3, planting soil 75m3, cover layer 18m3, loose clay 30m3, recruitment 30 man day.The low level pool is certainly Upper and under be followed successively by aquifer, cover layer, vegetation and plantation soil layer, hand-stuff layer, barrier layer, gravel layer.
(3) 9, many pools not of uniform size are constructed in Project Areas, area 400m altogether2.As follows with material: gravel 100m3, Fine sand 40m3, slag 60m3, planting soil 20m3, water caltrop and dwarfing Herba vallisneriae Spiralis 400m2, recruitment 30 man day.When running 1 year Interior guarantee lowest water level 20cm, deep water level 50cm.It is followed successively by submerged plant planting soil layer in the pool from top to bottom, manually fills out The bed of material, layer of sand, gravel layer.
(4) it is detained canal, wide 0.5m, deep 0.5m, long 50m.As follows with material: gravel 12.5m3, Bermuda grass 25m2, Recruitment 6 man day.Bermuda grass turf covers and is being detained above canal, cover degree 100%.
Recovery effects
In August, 2014, field monitoring showed that item area vegetation coverage reaches 90% after this system constructing runs 10 months Above, demonstration area biodiversity index more than 1.5, local species ratio more than 80%, rainwash flow velocity cuts down 50% Above, initial stage rainwash enters the suspended particulate substance in river course and reduces more than 75%, and TP clearance more than 25%, TN removes Rate more than 20%, ammonia nitrogen removal frank more than 30%, COD clearance more than 15%.
The inventive method is simple, easy and simple to handle, and floristics is this locality, it is achieved that the structure of region, gentle slope Riparian zone, The ecological recovery of region, gentle slope, river Riparian zone is provided a kind of good pattern.The successful implementation of this project significantly improves weight The bio-diversity of celebrating volt Niu Xi gentle slope Riparian Zone, improves the pollutant purification ability in region, gentle slope, efficiently solves gentle slope district Overseas source is seriously polluted, the phenomenon of soil erosion aggravation, provides feasible and effectively ecological for clear-cutting forestland and the reconstruction in river Reclamation activities.

Claims (7)

1. a construction method for gentle slope local area ecological Riparian zone, the steps include:
A. gentle slope belt environmental survey: probe gentle slope belt situation including River Hydrology, topography and geomorphology, the gradient, width, 20 annual flood position area above present status of land utilizations, determines that ecological Riparian zone needs the plant species ecological characteristic of screening in building;
B. gabion band builds: the envirment factor determined according to early stage on-site investigation, and regional climate meteorological factor, determines kind and the quantity of the plant of the height of gabion band, width and middle ware kind, it is ensured that the localization of gabion band plant, variation;
C. the low level pool builds: in Project Areas, transformed by substrate and prepartion of land, plantation Bermuda grass group or other deep root systems resistance to short-term water logging plant;
The most pools are built: in Project Areas, use the mode on the pool of digging, build small-sized pool, and transform at the bottom of the pool, plant planting submerged plant and pool base and Tang Zhou emergent aquactic plant group;
E. be detained canal construction: Project Areas with around the most adjacent region, highland, dig canal and formed and be detained canal, filling gravel, and use turf to cover;
F. the management of ecological Riparian zone is safeguarded: after ecological Riparian zone especially needed concern flood, solid refuse, silt are to region, the low level pool, the covering in Duo Tang region or alluvial, need periodically to clear up, simultaneously periodically to being grown in many pools and the vegetation in region, the low level pool, prevent it from decaying, rot to cause the secondary pollution of environment;Furthermore it is detained the management of canal after needing to add strong rainstorms, preventing from being detained canal is that silt covers, and needs the moment to note being detained the growing state of canal top Bermuda grass turf, prevents that braiding channel is exposed, turf is destroyed, and notice that turf aerial parts height not can exceed that 20cm, strengthen building maintenance.
The construction method of gentle slope the most according to claim 1 local area ecological Riparian zone, it is characterized in that: described gabion band is met between flood level river ordinary water level and 2 years one, it is made up of the block stone of particle diameter 0.15-0.5m, the cobblestone of block stone central filler particle diameter 0.05-0.10m, this block stone is wrapped up by steel mesh cage with cobblestone, steel wire through 5% zinc-aluminium-rare-earth alloy anticorrosion, tensile strength be more than 1500MPa, unit are bearing strength be more than 35kN/m2 , diameter 2mm, cylinder mould aperture 10cm, gabion uses steel wire area 25m2, volume 5m3, gabion buried depth 1.5m, protects width 2.0m.
The construction method of gentle slope the most according to claim 1 local area ecological Riparian zone, is characterized in that: plantation emergent aquactic plant including Typhaceae, JUNCACEAE and grass family in hole in the middle of step B gabion.
The construction method of gentle slope the most according to claim 3 local area ecological Riparian zone, is characterized in that: step B emergent aquactic plant includes at least one in Herba Typhae, typha orientalis, Medulla Junci, wild Medulla Junci, phragmites communis, Arundo donax.
The construction method of gentle slope the most according to claim 1 local area ecological Riparian zone, it is characterized in that: the step C low level pool was met flood level and within 20 years one, meets between flood level at 2 years one, the low level pool includes aquifer+cover layer+vegetation and plantation soil layer+hand-stuff layer+barrier layer+gravel layer;Wherein aquifer, less than gabion band and Duo Tang pool base 15-20cm;Cover layer, uses bark or sawdust all standing, thickness 5-8cm;Vegetation and plantation soil layer, use the sandy soil that infiltration coefficient is bigger, planting soil thickness 25cm, the grass of the plantation deep root system including Bermuda grass;Hand-stuff layer, uses the natural or artificial material that permeability is stronger, thickness 30~50cm, and material includes that and the plantation consistent sandy soil formed of soil layer or infiltration coefficient is not less than 10-5The slag of m/s or gravel;Barrier layer, spreads geotextiles or one layer of fine sand layer thick for 15cm between packing layer and gravel layer, forms barrier layer;Gravel layer, is made up of the diameter gravel less than 5cm, thickness 20-30cm;The grass of the low level pool region all standing deep root system including Bermuda grass, after substrate layer is transformed, uses the mode of sowing to plant, after item area consolidation, according to 500g/20m2Standard plantation.
The construction method of gentle slope the most according to claim 1 local area ecological Riparian zone, it is characterized in that: many pools are built, flood level and the Riparian zone met between flood level for 20 years were met in many pools at 2 years one, the deep 50cm in the pool, moment keeps depth of water 20cm, all standing submerged plant, including Hydrocharctaceae, Lentibulariaceae, the plant of Potamogetonaceae, described plant includes Herba vallisneriae Spiralis, downgrades Herba vallisneriae Spiralis, Herba Potamogetonis Pectinati, water caltrop, Hemerocallis citrina Baroni bladderwort;Pool base, by submerged plant planting soil layer, covers the submerged plant planting soil of 1-5cm at the bottom of the pool;Hand-stuff layer, uses the natural or artificial material that permeability is stronger, thickness 30~50cm, selects the sandy soil that form consistent with planting soil layer or infiltration coefficient not less than 10-5The slag of m/s or gravel;Layer of sand, is the auxiliary layer playing and intercepting soil particle entrance gravel layer, thick 5-10cm;Gravel layer, the diameter gravel composition less than 5cm, thickness 20-30cm;Pool base and the plantation of the pool week JUNCACEAE, Cyperaceae, the plant of Typhaceae, described plant includes Medulla Junci, wild Medulla Junci, stream sedge, Herba Typhae, the one or more combination of typha minima.
The construction method of gentle slope the most according to claim 1 local area ecological Riparian zone, it is characterized in that: the outside meeting flood level along ecological Riparian zone 20 years builds wide 0.5m, a delay canal of deep 0.5m, fills gravel, overlying deep root system grass, vegetation design height 15cm, periodically gathers in.
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