CN110002705A - The endogenous nitrogen load cutting method of lakeside zone bed mud based on water-level fluctuation - Google Patents

The endogenous nitrogen load cutting method of lakeside zone bed mud based on water-level fluctuation Download PDF

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CN110002705A
CN110002705A CN201910284114.6A CN201910284114A CN110002705A CN 110002705 A CN110002705 A CN 110002705A CN 201910284114 A CN201910284114 A CN 201910284114A CN 110002705 A CN110002705 A CN 110002705A
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bed mud
water
lakeside zone
level fluctuation
eutrophy
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刘成
杜奕衡
陈开宁
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Nanjing Institute of Geography and Limnology of CAS
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Nanjing Institute of Geography and Limnology of CAS
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/02Biological treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/16Nitrogen compounds, e.g. ammonia
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007Contaminated open waterways, rivers, lakes or ponds

Abstract

The present invention discloses a kind of endogenous nitrogen load cutting method of the lakeside zone bed mud based on water-level fluctuation, according to lakeside zone water-level fluctuation situation, by carrying out to eutrophy bed mud after eutrophy bed mud in situ or dredging, nature is exposed, turns over, is exposed to the sun, oxidative degradation, remold lakeside zone gentle slope substrate, the heavy water-of very water-is made in substrate after remodeling floats leaf multi-series aquatic plant system, it constructs the endogenous nitrogen load of lakeside zone bed mud and cuts down system, to reduce burst size and settling flux amount of the Nitrogen In Sediment to overlying water, improve water eutrophication situation.This technology implementation is simple, cost is relatively low, it can be not only used for cutting down the original endogenous nitrogen load of eutrophy bed mud in lakeside zone waters, it can also be used for closing on the lakeside zone low cost disposing task of eutrophy bed mud after waters is dredged, the release iron of eutrophy bed mud endogenous nitrogen can effectively be cut down, the settling flux for inhibiting eutrophy bed mud, the lakeside zone waters violent suitable for bed mud and water eutrophication outstanding problem, water-level fluctuation.

Description

The endogenous nitrogen load cutting method of lakeside zone bed mud based on water-level fluctuation
Technical field
The invention belongs to water ecologies to restore field, and in particular to a kind of lakeside zone bed mud endogenous nitrogen based on water-level fluctuation Load cutting method.
Background technique
Water eutrophication is the environment difficulties that the current whole world is faced with.Water eutrophication it is main the reason is that water The excessive buildup of nitrogen, phosphorus in body, causes the phytoplanktons such as cyanobacteria to be largely proliferated, and causes wawter bloom and water hypoxia, can cause when serious Keep fishes and shrimps dead.Excessive nitrogen, phosphorus usually have external loadings and the big main source of endogenous polyamine two in water body, wherein external loadings It mainly include the pollution of area source such as domestic pollution discharge, industrial pollution discharge, agricultural discharge etc.;Endogenous polyamine then refers mainly in bed mud Nitrogen and phosphorus element is to the release of overlying water, settling flux and the spontaneous phytoplankton blooms of water body etc..It is existing a large number of studies show that ( et al.2005,Nürnberg et al.2012,Et al.2003), if bed mud can not be inhibited Middle endogenous nitrogen, the release of phosphorus and settling flux, even if external loadings are cut in, the eutrophication and algal tufa of water body are still unable to get Effectively control.Therefore, bed mud endogenous polyamine is controlled and cuts down to cut down with important water eutrophication regulation and algal tufa Meaning.
Nitrogen is the one of the chief elements for leading to water eutrophication and algal tufa, and wherein ammonia nitrogen is that algae can preferentially utilize again Main nitrogen form (Glibert et al.2016, Paerl&Downes 1978).Eutrophy bed mud is higher due to usually containing Organic matter, degradation causes bed mud to be generally in anaerobic state and black is presented, and ammonia-nitrogen content is caused in bed mud to rise.Bed mud The nitrogen of middle excessive buildup can be entered in overlying water by way of spreading, dissolving, and can also be dwelt at stormy waves, bottom or artificial disturbance Under, entered in overlying water by settling flux form with particulate form, aggravates Eutrophication Status.Currently, Sediment Dredging is It removes one of the main technology of bed mud endogenous nitrogen (101962961 B of CN), but the human and material resources cost that Sediment Dredging expends It is high, and the eutrophy bed mud after dredging still remains and is difficult to the problem of disposing.Therefore, the original position of nitrogen load endogenous for bed mud Control all has significance in economic, society and environmentally.The control of bed mud endogenous polyamine with in-situ passivation or is covered at present Based on lid technology (103469762 B of CN 101811811 B, CN 202284288 U, CN), in-situ passivation or soverlay technique exist Control with appositional pattern recycle based on Internal phosphorus load in terms of there is obvious action, however, in control bed mud endogenous nitrogen In terms of load, in view of the presence of a variety of reactions such as nitration denitrification, Anammox in bed mud nitrogen cycle so that this method for The effect of bed mud endogenous nitrogen load control system is not as good as the control to phosphorus load.In addition, in some shallow lakes and river, stormy waves, Water flow, shipping, fishery etc. think that perturbation action will cause sediments greatly to disturb, thus caused sediments disturbance And settling flux is incited somebody to action so that covering and curing materials lose due effect, and cause eutrophic loose sediments re-suspension is supreme to cover It in water body, constitutes a threat to overlying water, this phenomenon is especially prominent in the violent lakeside region of long-term wave disturbance.
For current published patent or the report of document, to the release of bed mud endogenous nitrogen and the control and reduction of settling flux Larger deficiency is still remained, the release of bed mud endogenous nitrogen and settling flux pair not yet can be effectively solved under lower economic and social cost The threat of water eutrophication also not can effectively solve the handling problems of high preservation nitrogen in a large amount of bed muds in dystopy disposal process.
Summary of the invention
In view of deficiency of the prior art in terms of bed mud endogenous nitrogen load control system, the present invention is intended to provide a kind of be based on water level The endogenous nitrogen load cutting method of the lakeside zone bed mud of fluctuation, according to lakeside zone water-level fluctuation situation, by eutrophy bottom in situ Eutrophy bed mud progress nature is exposed after mud or dredging, turns over, is exposed to the sun, oxidative degradation, sufficiently promotes bed mud oxidation environment, reduces Its moisture content and porosity promote its stability, and are remolded by substrate, form lakeside zone gentle slope substrate.Base after remodeling The heavy water-of very water-to be made on bottom floats leaf multi-series aquatic plant system, the endogenous nitrogen load of building lakeside zone bed mud cuts down system, from And ammonia nitrogen in bed mud, total nitrogen are reduced to the burst size of overlying water, improve water eutrophication situation.
The present invention is directed to be cut down by simple technical solution, lower economic cost, the endogenous nitrogen load of effective bed mud Effect weakens or solves the threat that the endogenous polluted by nitrogen of bed mud constitutes water eutrophication, and solves a large amount of high nitrogens taxes after dredging Deposit the disposal difficulties of bed mud.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of endogenous nitrogen load cutting method of lakeside zone bed mud based on water-level fluctuation, includes the following steps:
Step 1: obtaining the endogenous nitrogen flux and anniversary water-level fluctuation feature, endogenous nitrogen flux > 0, and anniversary water of bed mud Region of the position fluctuating range within the scope of 0.5~2m is target area;When endogenous nitrogen flux > 0, ammonia nitrogen or total nitrogen in bed mud are indicated It is discharged into overlying water, needs to control release iron;Conversely, then ammonia nitrogen or total nitrogen collect into bed mud in overlying water. When water-level fluctuation is too low, being unable to satisfy shore bank band, bed mud is exposed and substrate remodeling demand;When water-level fluctuation is excessively high, it is unable to satisfy lake The building of system is cut down with the endogenous nitrogen load of bed mud in shore.
Step 2: target area exposes eutrophy bed mud when being in low water level, turned over, be exposed to the sun under natural lighting, Oxidative degradation operation;The low water level is bed mud depth of immersion in 10cm or less;
Step 3: target area is under high water level flood eutrophy bed mud after, construct multi-series aquatic plant system, surely Gu and pollution degradation bed mud;The multi-series aquatic plant system includes enduring from lakeside zone bank toward what middle of a lake direction was set gradually Water plant, submerged plant and floatingleaved plant;The high water level is bed mud depth of immersion in 0.5m or more;Meanwhile in the polyphyly Bulwark is established in the middle of a lake direction side of column aquatic plant system, prevents disturbance and settling flux of the stormy waves to polluted bed mud.Finally, It forms the endogenous nitrogen load of lakeside zone bed mud under water-level fluctuation and cuts down system.
Further, in the step 1, the endogenous nitrogen flux is the release iron of ammonia nitrogen or total nitrogen to overlying water.
Further, the endogenous nitrogen flux of bed mud is obtained described in step 1 in annual June to October (summer to autumn, flux It is higher) period progress.
Further, in the step 1, the endogenous nitrogen flux obtains that (model is at new etc., sea using the method for static release Ocean and lakes and marhshes, 2002).That is, after the column bed mud sample overlying water of in-situ acquisition is pumped, the slow, nothing along bed mud column sample side wall The water sample of the addition in-situ acquisition of disturbance, water sample depth are 20cm, the water bath with thermostatic control culture 72h at 25 DEG C, respectively 0,12, 24,36,48,60 and 72h takes overlying water sample, takes 50mL overlying water sample every time and supplements the original position 50mL water sample and then passes through Following formula calculate bed mud endogenous nitrogen release iron:
In formula: r is nitrogen release iron, and dimension is mg/ (m2·d);V is in bed mud column sample in nitrogen release iron acquisition process Overlying water total volume, dimension L;Cn、C0And Cj-1Respectively n-th, when initial and j-1 time samples in overlying water nitrogen concentration, Dimension is mg/L;CaFor the concentration of nitrogen in the raw water sample of addition, dimension mg/L;Vj-1For -1 sampling volume of jth (50mL), Dimension is L;A is the area of water sludge interface in bed mud column sample, dimension m2;T is the time that release experiment carries out, dimension d.
Further, in step 2 and step 3, the bed mud depth of immersion be bed mud substrate elevation and the water surface away from Deviation.
Preferably, it turns over, be exposed to the sun described in step 2, oxidative degradation operation continues 25 days altogether.
Preferably, in the step 2, turn over, be exposed to the sun, during oxidative degradation operation described, every 5 days by 10cm~ Anaerobic bottom mud at 50cm is turned over to surface layer, and is mixed well, the oxidative degradation under natural lighting.
Further, in the step 2, the eutrophy bed mud is the original eutrophy bed mud of lakeside zone or Its Adjacent Waters The eutrophy bed mud disposed is difficult to after environmental dredging.
Preferably, step 2 was carried out in annual 2 months to during April, cut down system to meet the endogenous nitrogen load of lakeside zone bed mud Building.
Preferably, turn over described in the step 2, be exposed to the sun, oxidative degradation operation while to substrate elevation in lakeside zone 200m It is remolded, foundation slope is made to be down to 15 ° or less.
In step 2, under low water level eutrophy bed mud by it is exposed, turn over, be exposed to the sun, after oxidative degradation, bed mud moisture content can 50% is down to hereinafter, bed mud porosity is down to 0.7 or less.Bed mud is that grey is changed into yellowish-brown again by black transitions, in bed mud The supersaturated oxide layer of surface layer formation 5mm to 10mm.
Preferably, the plantation width of emergent aquactic plant described in step 3 is 100m, and planting density is 10 plants/m2, emergent aquactic plant lid Degree is 100%;The plantation width of the submerged plant is 50m, and planting density is 10~15 plants/m2, submerged plant cover degree exists 80% or more;The plantation width of the floatingleaved plant is 50m, and planting density is 4~6 plants/m2, floatingleaved plant cover degree 50% with On.The plantation width is planting area from shore bank band large size emergent aquactic plant growing area toward the distance on the direction of the middle of a lake.
Preferably, emergent aquactic plant described in step 3 is reed or cattail.
Preferably, the submerged plant band is spike watermifoil, p.malaianus or eel grass.
Preferably, the 15 plants/m of planting density of the spike watermifoil2, 10 plants of the planting density of the p.malaianus/ m2, the planting density of the eel grass is 10 plants/m2
Preferably, the floatingleaved plant is floating heart or water lily.
Preferably, the planting density of the floating heart is 6 plants/m2, the planting density of the water lily is 4 plants/m2
Preferably, the floatingleaved plant is stable in bed mud using coarse wool bamboo frame and polyethylene hawser, prevent stormy waves and Artificial disturbance.
Further, the cable length is greater than water-level fluctuation amplitude 50cm, to cope with water-level fluctuation.
Further, in step 3, the bulwark is apart from the multi-series aquatic plant system 10m.
Preferably, the bulwark is made of townhouse fir pile, fir pile spacing 10cm.
Preferably, the fir pile diameter is 15cm, long 3.5m, wherein penetrating length in bed mud is 1m, is revealed under high water level The long 20cm or more in water outlet face part.
Further, the endogenous nitrogen load cutting method of the lakeside zone bed mud based on water-level fluctuation further includes to multi-series The reinforcing of the management of each water plant and floatingleaved plant in aquatic plant system.
Further, the management of the water plant is to be reseeded, within planting later six months to guarantee aquatic plant Object cover degree reaches requirement.
Further, the management of the water plant is included in annual November, carries out to very water and floatingleaved plant residuum Harvesting, to reduce influence of its residuum to water quality.
Further, the endogenous nitrogen load cutting method of the lakeside zone bed mud based on water-level fluctuation further include: described In 3 years after the endogenous nitrogen load cutting method implementation of lakeside zone bed mud based on water-level fluctuation, annual March and November are to floating leaf Plant is checked and is safeguarded twice, and after 3 years, the multi-series aquatic plant system implants can voluntarily succession.
The beneficial effects of the present invention are:
This technology can solve the endogenous nitrogen load of lakeside zone eutrophy bed mud to water body richness by simple and easy implementation method The influence of nutrient laden, and restore the lakeside wetland ecosystem.Suitable for bed mud and water eutrophication outstanding problem, water level wave Dynamic lakeside zone waters violent, wave disturbance is strong.This technology can be not only used for shore bank in situ of cutting down with the original eutrophy bottom in waters The endogenous nitrogen load of mud, it can also be used to which the on the one hand lakeside zone low cost disposing task for closing on eutrophy bed mud after the dredging of waters may be used Effectively to solve the release of lakeside zone bed mud endogenous nitrogen and settling flux under lower economic and social cost to water eutrophication It threatens, on the other hand can also effectively solve the disposal difficulties of a large amount of high preservation nitrogen Dredged bed muds.Application of the invention will be helpful to The regulation of disposition and water eutrophication to water eutrophication substrate sludge nitrogen.
Detailed description of the invention
Fig. 1 is the endogenous nitrogen load cutting method schematic diagram of lakeside zone bed mud based on water-level fluctuation.
Wherein, 1 is lake shore protection band, and 2 be terrestrial plant on the shore protection band of lakeside, and 3 be large-scale emergent vegetation zone, and 4 be low water The substrate that the lower eutrophy bed mud exposed in position is formed after disposition and remodeling, 5 be submerged plant band, and 6 be floatingleaved plant band, 7 It is the fixed hawser of floatingleaved plant, 8 be bulwark, and 9 be water-level fluctuation range, and 10 be water surface site under lowest water level.
Fig. 2 is specific implementation region anniversary ordinary water level fluctuation situation;
Fig. 3 is acid volatile sulfide (AVS) content in the bed mud under low water level after disposition and the bed mud without disposition Variation;
Fig. 4 is that ammonia nitrogen release iron changes in the bed mud under low water level after disposition and the bed mud without disposition;
Fig. 5 is that total nitrogen release iron changes in the bed mud under low water level after disposition and the bed mud without disposition;
Fig. 6 is that the endogenous nitrogen load of lakeside zone bed mud is cut down in system under water-level fluctuation and ammonia nitrogen expands in the bed mud without disposition Dissipate flux change in long term.
Fig. 7 is that the endogenous nitrogen load of lakeside zone bed mud is cut down in system under water-level fluctuation and total nitrogen expands in the bed mud without disposition Dissipate flux change in long term.
Specific embodiment
Below with reference to specific implementation case, the present invention is further explained.It should be understood that these case study on implementation are merely to illustrate this It invents rather than limits the scope of the invention.
It is endogenous to construct the bed mud based on water-level fluctuation for lakeside zone eutrophy bed mud in Chaohu northwestward lakeside zone Nitrogen load cuts down system, is cut down bed mud endogenous nitrogen release iron and settling flux.Meanwhile in the region closed on, setting Control zone, specific embodiment are as follows:
(1) the endogenous nitrogen flux assessment of eutrophy bed mud and anniversary water-level fluctuation feature obtain
In June to October, the assessment of substrate sludge nitrogen release iron persistently is carried out to target area and control zone, uses static state The method of release obtains ammonia nitrogen and total nitrogen in bed mud to the release iron of overlying water in 115mg m-2d-1More than, in bed mud Nitrogen release pollution in source protrudes, and threatens overlying water water quality, and black smelly and anaerobic state is presented in bed mud.
Target area (Chaohu northwestward lakeside zone) long-term waterlevel data is investigated, obtains region anniversary ordinary water level undulating Condition is as shown in Fig. 2, anniversary ordinary water level fluctuating range is about 2m.
(2) eutrophy bed mud is exposed under low water level, and is turned over, is exposed to the sun, oxidative degradation repeatedly under natural lighting Work:
Target area anniversary ordinary water level fluctuates situation according to Fig.2, when April, water level was minimum, water level 8.5m, at this time Water level reaches position shown in 10 in Fig. 1, sufficiently exposed, the width 200m of lakeside zone eutrophy bed mud 4.To sufficiently exposed lakeside 25 days turn over repeatedly is carried out with eutrophy bed mud 4, is exposed to the sun, oxidative degradation, during which, every 5 days by detesting at 10cm~50cm Oxygen bed mud is turned over to surface layer, and is mixed well, the oxidative degradation under natural lighting.It is exposed to eutrophy bed mud 4 under low water level, turn over It ploughs, be exposed to the sun, in Oxidative Degradation Process, substrate elevation in lakeside zone 200m is remolded, foundation slope is made to be down to 15 °.
Meanwhile the control zone closed on due to the gradient it is larger, the identical black smelly bed mud of pollution situation is in waterflooding shape always State does not make any disposition.
Lakeside zone eutrophy bed mud 4 by 25 days it is exposed, turn over, be exposed to the sun, oxidative degradation, bed mud moisture content by 75% drop To 40%, bed mud porosity is down to 0.65.Meanwhile the black smelly acid of bed mud is indicated in the lakeside zone eutrophy bed mud 4 by disposition Volatile sulphur (AVS) content persistently reduces (Fig. 3) in disposal process, the control bed mud disposed is not done substantially less than, through locating The lakeside zone eutrophy bed mud 4 postponed is that grey is changed into yellowish-brown again by black transitions.
Lakeside zone eutrophy bed mud 4 by 25 days it is exposed, turn over, be exposed to the sun, oxidative degradation, bed mud ammonia nitrogen and total nitrogen release Flux persistently reduces (Fig. 4, Fig. 5), by original 115mg m-2d-1Above near 0 hereinafter, bed mud switchs to nitrogen by the release of nitrogen It absorbs.
(3) multi-series aquatic plant system and bulwark are constructed:
In low water level in April, lakeside zone eutrophy bed mud 4 by 25 days it is exposed, turn over, be exposed to the sun, after oxidative degradation, It is reed and cattail, shape that emergent aquactic plant emergent aquactic plant, which is arranged, toward middle of a lake direction from lakeside zone bank in substrate first after remodeling At emergent vegetation zone 3, plantation width is 100m, and planting density is 10 plants/m2
Into May, water level is begun to ramp up, the lakeside strip substrate 4 after flooding remodeling again, then, from emergent vegetation zone 3 Toward middle of a lake direction, submerged plant band 5, width 50m are set.Submerged plant includes spike watermifoil, p.malaianus and eel grass, 15 plants/m of spike watermifoil planting density2, 10 plants/m of p.malaianus planting density2, eel grass planting density is 10 plants/m2
While the 5 kinds of plants of submerged plant band, drown oneself water vegetational zone 5 often the middle of a lake direction setting 50m wide floatingleaved plant, Including 6 plants/m2Floating heart, 4 plants/m2Water lily, formed floatingleaved plant band 6, floatingleaved plant use 10cm coarse wool bamboo frame and poly- second Alkene hawser 7 is stable in bed mud, and 7 length of hawser is 2.5m.
At multi-series aquatic plant system outward 10m, bulwark is constructed using townhouse fir pile, fir pile diameter is 15cm, long 3.5m, wherein penetrating length in bed mud is 1m, and expose the surface part 50cm, fir pile spacing 10cm under high water level.
Meanwhile the control zone closed on does not make any disposition.
(4) under water-level fluctuation bed mud endogenous nitrogen load cut down system maintenance.
In May to October, persistently to endured in the endogenous nitrogen load reduction system of lakeside zone bed mud under water-level fluctuation water, heavy water and The all types of water plants such as floating leaf are reseeded and are safeguarded that after growing naturally, 3 cover degree of emergent vegetation zone reaches 100%, are sunk 5 cover degree of water vegetational zone reaches 85%, and floatingleaved plant cover degree reaches 55%.
Bed mud endogenous nitrogen load cuts down system construction and completes in two years, persistently to release bed mud endogenous nitrogen under water-level fluctuation It puts flux and bed mud disturbance settling flux situation is observed, the results showed that, bed mud endogenous nitrogen load cuts down body under water-level fluctuation Under system, mainly endogenous ammonia nitrogen and total nitrogen release iron are continuously maintained in 0 hereinafter, illustrating that bed mud shows as the absorption shape of nitrogen to bed mud State.And the release iron of ammonia nitrogen and total nitrogen is continuously maintained in high level in untreated bed mud.In addition, respectively under water-level fluctuation The endogenous nitrogen load of bed mud is cut down sediments re-suspension situation in system and the control systems closed on and is investigated, as a result, it has been found that, Under water-level fluctuation in bed mud endogenous nitrogen load reduction system, sediments re-suspension amount is maintained at 30g/m for a long time-2d-1Hereinafter, and Untreated control zone is closed on, sediments re-suspension amount is maintained at 1000g/m for a long time-2d-1Left and right, illustrates structure according to the present invention Bed mud endogenous nitrogen load cuts down system and not only effectively reduces lakeside zone bed mud endogenous nitrogen release iron under the water-level fluctuation built, also The settling flux for effectively reducing pollution effectively reduces the endogenous nitrogen load of lakeside zone eutrophy bed mud, is lake eutrophication control Contribution is produced.

Claims (10)

1. a kind of endogenous nitrogen load cutting method of lakeside zone bed mud based on water-level fluctuation, which comprises the steps of:
Step 1: obtaining the endogenous nitrogen flux and anniversary water-level fluctuation feature of bed mud, endogenous nitrogen flux > 0, and anniversary water level wave Dynamic region of the amplitude within the scope of 0.5 ~ 2m is target area;
Step 2: target area exposes eutrophy bed mud when being in low water level, is turned over, be exposed to the sun, aoxidized under natural lighting Degradation operation;The low water level is bed mud depth of immersion in 10cm or less;
Step 3: target area is under high water level flood eutrophy bed mud after, construct multi-series aquatic plant system;It is described more Serial aquatic plant system includes that the emergent aquactic plant set gradually from lakeside zone bank toward middle of a lake direction, submerged plant and floating leaf are planted Object;The high water level is bed mud depth of immersion in 0.5m or more;Meanwhile in the middle of a lake direction of the multi-series aquatic plant system Bulwark is established in side.
2. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 1 based on water-level fluctuation, feature exist In the endogenous nitrogen flux for obtaining bed mud described in step 1 carries out in annual June to during October.
3. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 1 based on water-level fluctuation, feature exist In, turn over, be exposed to the sun described in step 2, oxidative degradation operation continue 25 days altogether.
4. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 1 based on water-level fluctuation, feature exist In in the step 2, the eutrophy bed mud is that the original eutrophy bed mud of lakeside zone or Its Adjacent Waters are difficult after environmental dredging With the eutrophy bed mud of disposition.
5. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 1 based on water-level fluctuation, feature exist In step 2 was carried out in annual 2 months to during April.
6. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 1 based on water-level fluctuation, feature exist In, turn over described in the step 2, be exposed to the sun, oxidative degradation operation while substrate elevation in lakeside zone 200m is remolded, make base Bottom sloping is down to 15 ° or less.
7. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 1 based on water-level fluctuation, feature exist In the plantation width of emergent aquactic plant described in step 3 is 100m, and planting density is 10 plants/m2, emergent aquactic plant cover degree is 100%;Institute The plantation width for stating submerged plant is 50m, and planting density is 10 ~ 15 plants/m2, submerged plant cover degree is 80% or more;The floating leaf The plantation width of plant is 50m, and planting density is 4 ~ 6 plants/m2, floatingleaved plant cover degree is 50% or more.
8. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 1 based on water-level fluctuation, feature exist In emergent aquactic plant described in step 3 is reed or cattail;The submerged plant band is spike watermifoil, p.malaianus or eel grass; The floatingleaved plant is floating heart or water lily.
9. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 8 based on water-level fluctuation, feature exist In the 15 plants/m of planting density of the spike watermifoil2, the 10 plants/m of planting density of the p.malaianus2, the eel grass Planting density is 10 plants/m2;The planting density of the floating heart is 6 plants/m2, the planting density of the water lily is 4 plants/m2
10. the endogenous nitrogen load cutting method of the lakeside zone bed mud according to claim 1 based on water-level fluctuation, feature exist In in step 3, the bulwark is apart from the multi-series aquatic plant system 10m.
CN201910284114.6A 2019-04-10 2019-04-10 The endogenous nitrogen load cutting method of lakeside zone bed mud based on water-level fluctuation Pending CN110002705A (en)

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