CN107512828A - Riparian Zone and storehouse bank are transformed with depression to cut down the method for water body nitrogen and phosphorus pollution - Google Patents

Riparian Zone and storehouse bank are transformed with depression to cut down the method for water body nitrogen and phosphorus pollution Download PDF

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Publication number
CN107512828A
CN107512828A CN201710868639.5A CN201710868639A CN107512828A CN 107512828 A CN107512828 A CN 107512828A CN 201710868639 A CN201710868639 A CN 201710868639A CN 107512828 A CN107512828 A CN 107512828A
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depression
water
plant
river
phosphorus
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刘文治
王娟
刘贵华
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Wuhan Botanical Garden of CAS
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Wuhan Botanical Garden of CAS
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/40—Protecting water resources
    • Y02A20/402—River restoration

Abstract

Comprised the following steps the invention discloses a kind of transformation Riparian Zone and storehouse bank with depression with cutting down the method for water body nitrogen and phosphorus pollution：S1：Depression form transformation：Multiple depression are chosen, the mean depth in the multiple depression after excavation or landfill is in 0.8 1.0m；S2：Depression water system connection：It will connect between adjacent depression, and will be connected between depression and the upstream in river course；River is flowed freely and flow into depression, and the river purified by depression is then discharged into the downstream in river course by irrigation canals and ditches；S3：Depression Sediment rehabilitation：Lay gravel layer, fine sand layer successively from bottom to up in depression；The long-acting carbon source of denitrification and phosphorus adsorbent are uniformly added in fine sand layer；S4:Aquatic vegetation recovers；S5：Zoobenthos is launched.The present invention has the advantages that simple possible, energy consumption are low and cost is cheap, can be widely applied to river ecological Restoration technical field.

Description

Riparian Zone and storehouse bank are transformed with depression to cut down the method for water body nitrogen and phosphorus pollution
Technical field
The present invention relates to river ecological Restoration technical field, it is more particularly related to a kind of transformation Riparian Zone and Storehouse bank is with depression to cut down the method for water body nitrogen and phosphorus pollution.
Background technology
With the high speed development of industrialization and urbanization in recent decades, the river of China Middle Eastern receives mostly Different degrees of pollution, each river faces quality of water environment deterioration, ornamental hydrophyte declines and ecosystem function declines The ecological problem such as move back.Nitrogen and phosphorus pollutantses are the major pollutants in China major part river.Too high concentration of nitrogen and phosphorus in water body Water quality of river can be caused to decline, endanger aquatic ecological environmental quality and the risk of higher eutrophication and breakout of water bloom be present；
The region that Riparian Zone and storehouse An Daishi rivers and reservoir both sides are flooded by flood influence, periodically, have stronger Nitrogen and phosphorus pollutantses cut down ability.From the 1960s, with external river water environmental protection and pollution control work it is extensive Carry out and deeply carry out, function of the Riparian Zone in terms of pollution of area source is cut down, retain river pollutional load starts to be realized and again Depending on, but substantial amounts of work all concentrates on North America and European Region.The research of Environmental Protection Agency shows that Riparian Zone average energy is gone Except in runoff about 67.5% nitrogen and phosphorus pollutantses, when riverbank bandwidth is more than 50m, its removal efficiency can reach 85.2%.
Riparian Zone and storehouse bank band can be fixed by approach such as plant absorption, bed mud deposition, Anammox and denitrifications Or the nitrogen in removal sewage, wherein denitrification is the most important approach that nitrogen removes.The total amount and quality of carbon source are to influence anti-nitre One of key factor of change effect.All there is the problem of carbon source deficiency and relatively low carbon-nitrogen ratio in current many sewage, cause Riparian Zone It is not high with storehouse bank band denitrification rate and nitric efficiency.The minimizing technology of phosphor in sewage includes electrolysis, chemical precipitation method, at film Logos and absorption method etc., wherein absorption method obtain so that it consumes energy less, effect is good, pollution is small, removes the advantages that fast in terms of dephosphorization Widest application.
Because physical features is gentle, Riparian Zone and the typically development of storehouse bank band are preferable for Plain or knob, but due to adopting sand for a long time, Cause to have left the depression of a large amount of areas and the depth of water not etc. on Riparian Zone and storehouse bank band.These depression are more by exposed gravel and river Sand forms, and not only has a strong impact on Riparian Zone and storehouse bank band landscape and ecosystem function, also exists necessarily when depression backwater It is dangerous.Therefore a kind of simple in construction, easy to implement the method, the cheap Riparian Zone of cost and storehouse bank band improvement of low land side are urgently provided Method, in favor of efficiently cutting down the nitrogen and phosphorus pollution in river, and lift Riparian Zone and the local landscape value of storehouse bank band.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide a kind of simple possible, the transformation Riparian Zone that energy consumption is low and cost is cheap and storehouse Bank is with depression to cut down the method for water body nitrogen and phosphorus pollution.
In order to realize according to object of the present invention and further advantage, there is provided one kind transformation Riparian Zone and storehouse bank band are hollow Ground is comprised the following steps with cutting down the method for water body nitrogen and phosphorus pollution：S1：Depression form transformation：Choose multiple depression, through excavate or The mean depth in the multiple depression after landfill is in 0.8-1.0m；S2：Depression water system connection：It will connect between adjacent depression It is logical, and will be connected between depression and the upstream in river course；River is flowed freely and flow into depression, and the river by depression purification is then The downstream in river course is discharged into by irrigation canals and ditches；S3：Depression Sediment rehabilitation：Lay gravel layer, fine sand layer successively from bottom to up in depression； The long-acting carbon source of denitrification and phosphorus adsorbent are uniformly added in fine sand layer；S4:Aquatic vegetation recovers：Emergent aquactic plant is planted In the region of the depression depth of water 0-20cm；By submerged plant planting in the region of the depression depth of water 50-120cm；By floating leaf Planting is in depression depth of water 50-100cm region；Emergent aquactic plant, submerged plant and floatingleaved plant are seedling and plantation is close Degree is 3-10 strains/m2；S5：Zoobenthos is launched：Snail, shellfish, bivalves, the snail are launched on the fine sand layer top layer in depression For 0.05-0.2kg/m2, the shellfish is 0.1-0.5kg/m2, the bivalves is 0.1-0.5kg/m2。
For any one of depression, the depth capacity in depression is no more than 1.5m, the face in the depression Product 10-100m2。
Preferably, the long-acting carbon source of the denitrification and phosphorus adsorbent account for the 5-10% of fine sand layer volume, the denitrification length Effect carbon source is charcoal, and the phosphorus adsorbent is cinder, and the particle diameter of the charcoal and cinder is 2-5mm.
Preferably, the emergent aquactic plant be cattail, calamus, arrowhead, Scirpus tabernaemontani, Paspalum distichum, Lythrum salicaria, Hemarthria compressa, scirpus triqueter, One or more in wild rice and water pepper；The submerged plant is eel grass, potamogeton malaianus, hornwort, Potamogeton pectinatus L, spike fox One or more in tail algae and water caltrop；The floatingleaved plant is one in water lily, gold and silver lotus flower, floating heart, spatterdock and wild water chestnut Kind is a variety of.
Preferably, described transformation Riparian Zone and storehouse bank with depression to cut down the method for water body nitrogen and phosphorus pollution, in addition to：It is hollow Ground final-period management；Specifically include：Water plant being reseeded and clearing up so that the overall coverage of the water plant is maintained at More than 50%；Autumn and winter periodically gathers in plant residue；Timely ditch cleaning silt and rubbish after flood season, it is ensured that river energy Flowed freely in the system of depression.
Preferably, the gravel thickness 5-10cm；The fine sand thickness 10-15cm.
Preferably, the irrigation canals and ditches width is 30-60cm, and depth is no more than 0.5m.
The present invention comprises at least following beneficial effect：
This method is simple and easy, easy to operate, realizes Riparian Zone and storehouse bank distributing rationally with water plant, improves Riparian Zone and storehouse bank bio-diversity and ecological functions with depression, effectively improve water quality of river, General Promotion Riparian Zone With the landscape value of storehouse bank band, the healthy and stable development of Riparian Zone and storehouse bank with the ecosystem is promoted.Compared with the prior art The invention has the advantages that：
First, efficient, unpowered ecological purification system is built using the existing depression of Riparian Zone and storehouse bank band, can subtracted The soil of few sewage disposal and energy resource consumption, reduce input of the government department in river water environmental improvement.
2nd, collaboration constructs Riparian Zone and storehouse bank band depression aquatic vegetation and benthic fauna, significantly improves The bio-diversity of Riparian Zone and storehouse bank band.
3rd, the aquatic higher plants of plantation all pass through Large-scale Screening, have higher nitrogen phosphorus absorbability and landscape valency Value, and can effectively lift the landscape effect of Riparian Zone and storehouse bank band.
4th, fine sand layer with the addition of cheap charcoal as denitrifying carbon source and cinder as phosphorus adsorbent, can grow Phase efficiently cuts down the nitrogen and phosphorus pollution of water body.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is the schematic diagram in depression of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text Word can be implemented according to this.
It should be noted that experimental method described in following embodiments, is conventional method unless otherwise specified, institute Reagent and material are stated, unless otherwise specified, is commercially obtained；In the description of the invention, term " transverse direction ", " vertical To ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", the instruction such as " outer " side Position or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplify description, It is not instruction or implies signified device or element there must be specific orientation, with specific azimuth configuration and operation, because This is not considered as limiting the invention.
As shown in figure 1, the present invention provides a kind of transformation Riparian Zone and storehouse bank with depression to cut down the side of water body nitrogen and phosphorus pollution Method, comprise the following steps：S1：The form transformation of depression 2：Multiple depression 2 are chosen, the multiple depression 2 after excavation or landfill Mean depth in 0.8-1.0m；S2：The water system connection of depression 2：It will connect between adjacent depression 2, and by depression 2 and river course Connected between upstream；River is flowed freely and flow into depression 2, and the river purified by depression 2 is then discharged into river course by irrigation canals and ditches 1 Downstream；S3：Depression Sediment rehabilitation：Lay gravel layer 5, fine sand layer 4 successively from bottom to up in depression 2；In fine sand layer 4 It is even to add the long-acting carbon source of denitrification and phosphorus adsorbent；S4:Aquatic vegetation recovers：Emergent aquactic plant 8 is planted in the depression 2 Depth of water 0-20cm region；Submerged plant 10 is planted in the region of the depth of water 50-120cm of depression 2；By 9 kinds of floatingleaved plant It is implanted in the depth of water 50-100cm of depression 2 region；Emergent aquactic plant 8, submerged plant 10 and floatingleaved plant 9 are seedling and planting density It is 3-10 strains/m2；S5：Zoobenthos 11 is launched：Snail, shellfish, bivalves, the spiral shell are launched on the top layer of fine sand layer 4 in depression 2 Class is 0.05-0.2kg/m2, the shellfish is 0.1-0.5kg/m2, the bivalves is 0.1-0.5kg/m2.In the river that physical features is gentle Bank band and storehouse bank region, choose self-assembling formation or adopt the depression 2 that sand is left, it is possible to reduce it is artificial, reduce cost.The present invention is suitable Close and promoted the use of in southern Plain or knob Riparian Zone and storehouse bank with the region that wetland development is preferable, physical features is gentle.This hair It is bright that the depression 2 that sand leaves with self-assembling formation or is mainly adopted based on Riparian Zone and storehouse bank, according to landform to the local form of depression 2 Transformed, and in the depression internal build ecosystem of river course the same side, river is introduced into the ecosystem in depression 2 and purified Afterwards, then it is introduced back river course downstream.Microorganism, adsorbent in aquatic vegetation, zoobenthos and water body are engaged, by river In pollutant, particularly nitrogen and phosphorus pollutantses purify, and polluted river leads back river after being cleaned in the ecosystem in depression Road.
For any one of depression 2, the depth capacity in depression 2 is no more than 1.5m, the area in the depression 2 10-100m2.For the security consideration of river course surrounding resident, the depth capacity and area in each depression are defined.
The long-acting carbon source of the denitrification and phosphorus adsorbent account for the 5-10% of the volume of fine sand layer 4, the long-acting carbon source of denitrification For charcoal 6, the phosphorus adsorbent is cinder 7, the particle diameter of the charcoal 6 and cinder 7 is 2-5mm.Charcoal 6 and cinder 7 It is easily obtained, is cheap.Charcoal is rich in micropore, can not only supplement the content of organics of soil, can also effectively protect Water point and nutriment.Cinder can be used as adsorbent, the phosphorus in adsorbed water body, purifying water body.
The emergent aquactic plant 8 is cattail, calamus, arrowhead, Scirpus tabernaemontani, Paspalum distichum, Lythrum salicaria, Hemarthria compressa, scirpus triqueter, wild rice and water One or more in knotweed；The submerged plant 10 is eel grass, potamogeton malaianus, hornwort, Potamogeton pectinatus L, spike watermifoil With the one or more in water caltrop；The floatingleaved plant 9 be water lily, gold and silver lotus flower, floating heart, spatterdock and one kind in wild water chestnut or It is a variety of.The nitrogen phosphorus absorbability and landscape value of the common water plant of systematic analysis technique China, have filtered out suitable southern gas Time condition, the aquatic higher plants more than 20 with higher nitrogen phosphorus absorbability and ornamental value are planted.When selection recovers species, The complexity of river or reservoir hydrologic situation is taken into full account, selects the water plant of one's native land of resistance to long-term water logging, and is kept higher Plant Diversity.At present, aquatic plant species are various, and contain substantial amounts of external and invasive species, to avoid producing ecology Risk, external and invasive species are avoided in option of species.Recover aquatic vegetation and be favorably improved water body dissolved oxygen content and transparent Degree, strengthen the nitrification and denitrification ability of the ecosystem of depression 2, lift Riparian Zone and the landscape value of storehouse bank band.It is in addition, aquatic Plant can also absorb substantial amounts of nitrogen and phosphorus pollutantses.Aquatic vegetation can not only purify sewage, improve the ecological environment, and may be used also Economic benefit is obtained for use as biomass energy, also provides environmental condition for the existence of some aquatiles.
Described transformation Riparian Zone and storehouse bank with depression to cut down the method for water body nitrogen and phosphorus pollution, in addition to：The depression later stage Management；Specifically include：Water plant being reseeded and clearing up so that the overall coverage of the water plant be maintained at 50% with On；Autumn and winter periodically gathers in plant residue；The timely silt of ditch cleaning 1 and rubbish after flood season, it is ensured that river can be in low-lying area Flowed freely in the system of ground 2.
The 5 thick 5-10cm of gravel layer；The 4 thick 10-15cm of fine sand layer.
The width of irrigation canals and ditches 1 is 30-60cm, and depth is no more than 0.5m.
In order to be better understood from the present invention, the present invention is described in further detail with reference to specific implementation case.This Embodiment method is implemented on the domestic Danjiangkou Reservoir storehouse bank band in Xichun County of Henan Province.Danjiangkou Reservoir is Middle Line Project For Transferring Water From South To North work The water head site of journey, but its quality of water environment allows of no optimist at present, and total nitrogen content is well beyond the II of center line water diversion project requirement Class water standard.Disturbed due to adopting sand, swag blazons in trial zone, and swag does not connect mutually with river course, and the water body 3 in depression can not be certainly By flowing, summer often emits bad smell.Before improvement, depression 2 is weedy in implementation area, and swag is deep mixed, and aquatic vegetation is sparse, Bio-diversity, ecological functions and landscape value are all than relatively low.
Embodiment 1：
A kind of to transform Riparian Zone and storehouse bank with depression to cut down the method for water body nitrogen and phosphorus pollution, its step is：
1st, depression form is transformed：5 are chosen on the bank band of storehouse and is separated by nearer depression 2, and depression 2 is made by excavation or landfill Mean depth is maintained at 1m or so, and the bosom of depression 2 is no more than 1.5m, and the average area of depression 2 is 55m2。
2nd, depression water system connects：Depression 2 is connected with neighbouring river course by ditching or laying concrete culvert pipe with great, made certainly The river that stream enters can flow freely in the system of depression 2, and be discharged into reservoir by irrigation canals and ditches 1.The width of irrigation canals and ditches 1 is 50cm, depth No more than 0.5m；Culvert pipe internal diameter is 40cm.
3rd, depression Sediment rehabilitation：Gravel layer 5 thick lower floor laying about 10cm, gravel average grain diameter are about in depression 2 3cm, fine sand layer 4 thick upper strata laying 10cm, gravel and fine sand are taken from local storehouse bank band.Uniformly added in fine sand layer 4 The granular biological charcoal 6 and cinder 7 of 10% volume are as the long-acting carbon source of denitrification and phosphorus adsorbent；Granular biological charcoal 6 and cinder 7 Average grain diameter is 2mm.
4th, aquatic vegetation recovers：Include the plantation of emergent aquactic plant 8, submerged plant 10 and floatingleaved plant 9.Emergent aquactic plant 8 be cattail, Paspalum distichum and Lythrum salicaria, allocation ratio 5：3：2, it is planted in water level 0-20cm region；Submerged plant 10 is Eel grass, hornwort and Potamogeton pectinatus L, allocation ratio 1：1：1, it is planted in water level 50-120cm region；Floatingleaved plant 9 is Water lily, it is planted in depth of water 50-100cm region；Water plant planting uses seedling replanting method, the planting density of emergent aquactic plant 8 For 10 plants/m2, the planting density of submerged plant 10 is 6 plants/m2, the planting density of floatingleaved plant 9 is 2 plants/m2。
5th, zoobenthos 11 is launched：Snail, shellfish, bivalves are launched on the fine sand top layer of depression 2, the snail throw-in density is 0.1kg/m2, the shellfish throw-in density is 0.3kg/m2, the bivalves throw-in density is 0.3kg/m2。
6th, depression final-period management：After water plant planting, observed 1 time per two weeks, the density of submerged plant 10 is entered when excessive Row is appropriate to be removed, and to be reseeded when density is excessively dilute, the overall coverage of Growing season water plant will be maintained at more than 50%；Autumn Winter periodically gathers in plant residue；The timely silt of ditch cleaning 1, rubbish and other debris after each flood, it is ensured that river Water can flow freely in the system of depression 2.
The monitoring result of continuous 6 months shows, after restoration of the ecosystem, water quality and water outlet in the depression 2 of storehouse bank band The water quality of irrigation canals and ditches be significantly better than Reservoir Water Quality, the dissolved oxygen content and transparency of the water body 3 in depression have also obtained certain lifting.Change Storehouse bank after making has higher reduction efficiency to water body nitrogen and phosphorus pollutantses with the ecosystem of depression 2, and wherein total nitrogen is averaged Except rate is 52.5%, the average removal rate of total phosphorus is 68.3%, and the water body after processing reaches《Water environment quality standard》 (GB3838-2002) lake storehouse Group III water standard.
The top layer silt sample of the depression ecosystem, it is determined by acetylene inhibition-gas chromatography after collection transformation Denitrification rate, show every km2The annual minimum removable 6920kg in depression 2 nitrogen, the charcoal of fine sand layer addition effectively increases The strong denitrification denitrogenation ability of the depression ecosystem.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, it is of the invention and unlimited In specific details and shown here as the legend with description.

Claims (7)

1. a kind of transform Riparian Zone and storehouse bank with depression to cut down the method for water body nitrogen and phosphorus pollution, it is characterised in that including following Step：
S1：Depression form transformation：Multiple depression are chosen, the mean depth in the multiple depression after excavation or landfill is in 0.8- 1.0m；
S2：Depression water system connection：It will connect between adjacent depression, and will be connected between depression and the upstream in river course；Enable river Free-flowing flows into depression, and the river purified by depression is then discharged into the downstream in river course by irrigation canals and ditches；
S3：Depression Sediment rehabilitation：Lay gravel layer, fine sand layer successively from bottom to up in depression；Uniformly added in fine sand layer The long-acting carbon source of denitrification and phosphorus adsorbent；
S4:Aquatic vegetation recovers：Emergent aquactic plant is planted in the region of the depression depth of water 0-20cm；By submerged plant kind It is implanted in the region of the depression depth of water 50-120cm；Floatingleaved plant is planted in depression depth of water 50-100cm region；Very water is planted Thing, submerged plant and floatingleaved plant are seedling and planting density is 3-10 strains/m2；
S5：Zoobenthos is launched：Snail, shellfish, bivalves are launched on the fine sand layer top layer in depression, the snail is 0.05- 0.2kg/m2, the shellfish is 0.1-0.5kg/m2, the bivalves is 0.1-0.5kg/m2。
2. Riparian Zone and storehouse bank are transformed as claimed in claim 1 with depression to cut down the method for water body nitrogen and phosphorus pollution, its feature It is, for any one of depression, the depth capacity in depression is no more than 1.5m, the area 10- in the depression 100m2。
3. Riparian Zone and storehouse bank are transformed as claimed in claim 1 with depression to cut down the method for water body nitrogen and phosphorus pollution, its feature It is, the long-acting carbon source of the denitrification and phosphorus adsorbent account for the 5-10% of fine sand layer volume, and the long-acting carbon source of denitrification is made a living Thing charcoal, the phosphorus adsorbent are cinder, and the particle diameter of the charcoal and cinder is 2-5mm.
4. Riparian Zone and storehouse bank are transformed as claimed in claim 1 with depression to cut down the method for water body nitrogen and phosphorus pollution, its feature It is, the emergent aquactic plant is in cattail, calamus, arrowhead, Scirpus tabernaemontani, Paspalum distichum, Lythrum salicaria, Hemarthria compressa, scirpus triqueter, wild rice and water pepper One or more；The submerged plant is eel grass, potamogeton malaianus, hornwort, Potamogeton pectinatus L, spike watermifoil and water caltrop In one or more；The floatingleaved plant is the one or more in water lily, gold and silver lotus flower, floating heart, spatterdock and wild water chestnut.
5. Riparian Zone and storehouse bank are transformed as claimed in claim 1 with depression to cut down the method for water body nitrogen and phosphorus pollution, its feature It is, in addition to：Depression final-period management；Specifically include：
Water plant being reseeded and clearing up so that the overall coverage of the water plant is maintained at more than 50%；
Autumn and winter periodically gathers in plant residue；
Timely ditch cleaning silt and rubbish after flood season, it is ensured that river can flow freely in the system of depression.
6. Riparian Zone and storehouse bank are transformed as claimed in claim 1 with depression to cut down the method for water body nitrogen and phosphorus pollution, its feature It is, the gravel thickness 5-10cm；The fine sand thickness 10-15cm.
7. Riparian Zone and storehouse bank are transformed as claimed in claim 1 with depression to cut down the method for water body nitrogen and phosphorus pollution, its feature It is, the irrigation canals and ditches width is 30-60cm, and depth is no more than 0.5m.
CN201710868639.5A 2017-09-22 2017-09-22 Riparian Zone and storehouse bank are transformed with depression to cut down the method for water body nitrogen and phosphorus pollution Pending CN107512828A (en)

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CN108002666A (en) * 2018-01-15 2018-05-08 上海山恒生态科技股份有限公司 Ecological filter in a kind of Water Ecological Recovery
WO2020114039A1 (en) * 2018-12-04 2020-06-11 浙江大学 System and method for intercepting nitrogen and phosphorus in countryside landscape type ecological ditch
CN111718076A (en) * 2020-07-03 2020-09-29 四川省内江市农业科学院 Method for treating small water eutrophication in hilly areas
CN112064569A (en) * 2020-09-04 2020-12-11 野趣生境环境设计（成都）研究院（有限合伙） Method for constructing pond suitable for frog inhabitation in green land

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CN103819002A (en) * 2013-12-13 2014-05-28 上海市南洋模范中学 Biomass carbon source release combination type ecological floating bed water purifying device
CN105254021A (en) * 2015-11-24 2016-01-20 中国科学院武汉植物园 Method for purifying polder area multiple sewage by using polder area ditch-pond ecological system
CN106277334A (en) * 2016-08-08 2017-01-04 中冶华天工程技术有限公司 Clear water type ecosystem and construction method thereof

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CN103819002A (en) * 2013-12-13 2014-05-28 上海市南洋模范中学 Biomass carbon source release combination type ecological floating bed water purifying device
CN105254021A (en) * 2015-11-24 2016-01-20 中国科学院武汉植物园 Method for purifying polder area multiple sewage by using polder area ditch-pond ecological system
CN106277334A (en) * 2016-08-08 2017-01-04 中冶华天工程技术有限公司 Clear water type ecosystem and construction method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108002666A (en) * 2018-01-15 2018-05-08 上海山恒生态科技股份有限公司 Ecological filter in a kind of Water Ecological Recovery
WO2020114039A1 (en) * 2018-12-04 2020-06-11 浙江大学 System and method for intercepting nitrogen and phosphorus in countryside landscape type ecological ditch
US11352279B2 (en) 2018-12-04 2022-06-07 Zhejiang University Rural landscape-type nitrogen and phosphorus ecological interception ditch system and farmland drainage nitrogen and phosphorus interception method using the same
CN111718076A (en) * 2020-07-03 2020-09-29 四川省内江市农业科学院 Method for treating small water eutrophication in hilly areas
CN112064569A (en) * 2020-09-04 2020-12-11 野趣生境环境设计（成都）研究院（有限合伙） Method for constructing pond suitable for frog inhabitation in green land

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