CN104926032A - Multistage compound strengthening and purifying method for tidal waterway in coastal city - Google Patents

Multistage compound strengthening and purifying method for tidal waterway in coastal city Download PDF

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Publication number
CN104926032A
CN104926032A CN201510315727.3A CN201510315727A CN104926032A CN 104926032 A CN104926032 A CN 104926032A CN 201510315727 A CN201510315727 A CN 201510315727A CN 104926032 A CN104926032 A CN 104926032A
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district
water
adjustable type
tidal
river
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CN104926032B (en
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彭文启
渠晓东
张晶
吴文强
解莹
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China Institute of Water Resources and Hydropower Research
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China Institute of Water Resources and Hydropower Research
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/40Protecting water resources
    • Y02A20/402River restoration

Abstract

The invention discloses a multistage compound strengthening and purifying method for a tidal waterway in a coastal city. The method comprises the following steps: at the aim of the requirements of ecological restoration to tidal waterways in coastal cities, regional division is performed on the tidal waterway, and the tidal waterway is divided into a region A, a region B, a region C, a region D and a region E in sequence; a first front setting tank is arranged in the region A, intensifying and clarifying tanks are formed in the region B and the region C, and a plurality of artificial aquatic-plant regions and artificial aeration regions are arranged in the intensifying and clarifying tanks; an ecological restoration and landscape repairing regions are arranged in the region C; porous ecological walls are arranged on the frontiers of the region B, the region C and the region D. The method provided by the invention is also suitable for ecological management to common city river ways, is particularly suitable for ecological restoration and treatment to tidal river courses influenced by sea water in coastal cities, has a remarkable effect for enhancing the landscape function of city river reach, and is classified as a scientific, effective and sustainable environment friendly treatment method.

Description

A kind of tidal waterway, coastal cities multistage composite intensified purification method
Technical field
The present invention relates to river channel ecology technical field, particularly tidal waterway, a kind of coastal cities multistage composite intensified purification method.
Background technology
In the river course flowing through population accumulation area, a large amount of pollutent is unprocessed just directly enters river and makes water body suffer severe contamination.City is in order to the needs of flood control-discharge dyke, how to consider river regulation from engineering viewpoint, by river cutoff, three, two sides, river are solidified by cement steel, such facility has completely cut off the connection of river and riverbed and riverbank system, the environment being applicable to more biological existences is disappeared, its ecological functions and detergent power are also degenerated thereupon, large number of biological in river course is directly caused to disappear, the disposal of pollutants of high loading makes the inner ecosystem collapse of river water body disintegrate easily, so present stage city river mostly become not only black but also smelly, become typical sewage ditch, alluvial seriously also loses function of flood drainage substantially.Add that the riverbank of solidification lacks hydrophilic facility, people are gradually away from river course.
Coastal cities are also faced with another difficult problem that urban river is repaired, city inland river restoration of the ecosystem current is exactly configured to master with Freshwater ecosystems, during high tide, seawater intrusion can have a strong impact on the survival of repairing limnobios in section, destroys the eubiosis of aquatic ecosystem artificial constructed in river.
In view of foregoing description, urgently there is one to be suitable for tidal waterway, coastal cities multistage composite intensified purification method, repair river ecosystem and improve streamside and coastal ecological environment, the urban environment beautified.
Summary of the invention
One of the object of the invention is to provide a kind of effective tidal waterway, coastal cities restoration technique, the method of river course multistage composite aquatic ecosystem effectively can reduce urban river water body suspended substance, reduce river Organic pollutants, cut down water body eutrophication degree, the inventive method is also applicable to the ecological treatment method in common river course, being specially adapted to the ecological management of tidal waterway, coastal cities, is a kind of scientific and effective, the environmentally friendly administering method of Sustainable development.
Two of the object of the invention is to provide a kind of metastable urban river aquatic ecosystem constructing technology method, the stable ecosystem that Water quality restoration district is formed, long-acting organism and eutrophication removal function can be played, its advantage of lower cost safeguarded, and go up the landscape effect of river training largely, form the city river view restorative procedure of the clear scape U.S. of water.
For achieving the above object and some other objects, the technical solution used in the present invention is:
A kind of tidal waterway, coastal cities multistage composite intensified purification method, it is characterized in that, utilize the method for river course subregion, the river of high-pollution load is made to enter repair system step by step, form the water quality complex repairation system that suspended substance sedimentation-organic matter removal-nitrogen and phosphorus load is cut down, and in conjunction with the design of artificial Ecology view, reach city river water quality and repair the object with beautification of landscape, mainly comprise the following steps:
Step one, carries out Region dividing by tidal waterway, described coastal cities, is divided into A district, B district, C district, D district and E district from its estuario successively to upstream;
Step 2, arranges the first adjustable type retaining dam between described A district and downstream tidal river reach, and described A district and B interval arrange the second adjustable type retaining dam; E district and D interval arrange the 3rd adjustable type retaining dam, arrange the 4th adjustable type retaining dam between E district and upper river; The first adjustable type retaining dam in A district directly invades Water quality restoration district for intercepting downstream salt water at the incoming tide, and the 4th paramodulant retaining dam in E district directly enters Water quality restoration district for intercepting upstream burst Pollution thing, affects the stability of the Freshwater ecosystem; Second and the 3rd adjustable type retaining dam be mainly used in urban waterlogging and immense floods prevail time, the maintenance of river course flood discharge function;
The seawater that first retaining dam in A district is mainly used in intercepting downstream high salinity at the incoming tide directly invades Water quality restoration district, and the seawater Freshwater ecosystem of supersalinity has destructive impact; 4th retaining dam in E district directly enters Water quality restoration district for intercepting upstream high loading pollutent, high loading polluted-water directly enters Water quality restoration district, water transparency can be caused to decline, algae grows reduction Dissolved Oxygen in Water in a large number, directly affects the stability of the aquatic macrophyte in Water quality restoration district, zoobenthos and Fish Communities etc.;
Step 3, arranges first near the second adjustable type retaining dam place and blocks dirty airflow fence in described A district, arranges second block dirty airflow fence in described E district near the 3rd adjustable type retaining dam place;
Step 4, forms heavy pond before first in described A district, and before described first, heavy pond is arranged on described first adjustable type retaining dam and described first and blocks between dirty airflow fence; Form heavy pond before second in E district, and before described second, heavy pond is arranged on described 4th adjustable type retaining dam and described second and blocks between dirty airflow fence;
First adjustable type retaining dam-four adjustable type retaining dam also plays the effect maintaining and regulate and control water level in A district, B district, C district, D district and E district; the artificial aquatic ecosystem that Conservative restoration section builds maintains enough water levels, and the Freshwater ecosystem in protection Water quality restoration district is brought into normal play function.
Step 5, forms strengthened purification pond in described B district and D district, arranges multiple artificial aquatic weed section and multiple artificial aeration's section in each strengthened purification pond respectively; Described artificial aquatic weed section and artificial aeration's section are mainly used in reducing the organic content in water body, the river in B district described in strengthened purification and D district;
Artificial aeration's section is increased by dissolved oxygen amount in river water by the means of aerator forced aeration, to provide oxygen to the bacterium be arranged on the artificial aquatic weed of two artificial aeration zone sections, form microbial film, on a biomembranous section, by outer and in define aerobic, amphimicrobian and anaerobism three kinds of reaction zones.In aerobic zone, mineralized nitrogen is nitrate by aerobic bacteria, and small organic molecule be converted into carbonic acid gas and water (inorganic phosphorus be converted into ATP in cell paste); In anaerobic zone, nitrate is converted into nitrogen and oxygen (larger molecular organics that difficulty is decomposed is decomposed into degradable small organic molecule) by anerobe.Final pollution group is just decomposed and changes into the N of effusion water body 2, CO 2and H 2o.
Ecological grass microbial film mounting means be by coagulation stake river course drift type lay, stake is precast reinforced coagulation structure, ecological grass microbial film specification be every bar 1 meter long, 0.05 meter wide.Often arrange ecological grass microbial film to be worn into by every bar ecological grass microbial film by rope, every bar ecological grass is biomembranous is spaced apart 0.1 meter.Often arrange ecological grass microbial film to be fixed by Prefabricated Reinforced Concrete Square Pile.
Step 6, multiple submerged plant and emergent are planted in the riverbed in described C district; Its water surface arranges stereo ecological platform plantation watercress; To release in described C district multiple fish and Benthic Aquatic; In described C district and described B interval, described C district and described D district critical part arrange porous Ecological Wall;
Porous ecological brick forms through roasting for main raw material with clay, shale, coal gangue, flyash, be mainly used in the brick of weight bearing area, external form is right angle hexahedron, and technical process is: determine masoning method → mixing mortar → profit brick → select brick and row's brick → masonry panel.The upper and lower fissure of displacement of masonry, inside and outside take block, adopt and one build form along a fourth, plum blossom fourth or three along a header.
After the purifying treatment at two ends, C district, in river course, Water quality reaches waterplant and zoic needs substantially, therefore in C district, arranges multiple stereo ecological platform, and suitably plants planting submerged plant and floatingleaved plant.Wherein, submerged plant can absorb in water the effect of imitating oxygen with the nutritive substance such as nitrogen, phosphorus in substrate, feedwater height, reducing water body recovery technology concentration, suppressing the development of algae and construction lake surface view in a large number; Floating leaf flower plant not only has good beautification of landscape effect, and root system and floating leaf back can absorb the nutritive substance in water body and mud, have certain detergency to upper strata water body; Stereo ecological platform utilizes the combined action of microorganism in emergent, plant root-zone microorganism, biofilm carrier to the absorption of water body Middle nutrition material and pollution substance, decomposition, digestion to realize the object of purification of water quality.
Wherein, described first ~ four adjustable type retaining dam is when running into urban waterlogging and sudden flood, and regulating gate is opened completely, completes prevention waterlogging of drainning off floodwaters, and all the other Timing discharges, to provide metastable water surrounding, support the stable of the Freshwater ecosystem.
Preferably, it is 1.5% that the length in described A district or described E district accounts for the length percent of tidal waterway minimum, is 5% to the maximum; It is 15% that the length in described B district or described D district accounts for the length percent of tidal waterway minimum, is 20% to the maximum; Residue section is described C district.
Preferably, the height of described first adjustable type retaining dam, leads to the maximum value of the nearly 10 years tide records in coastal cities; The height of the second adjustable type retaining dam, higher than the maximum value of coastal cities history tide record; The height of the 3rd adjustable type retaining dam, higher than the maximum stage value of wet season river course upland water; The height of described 4th adjustable type retaining dam, higher than the maximum stage value of wet season river course upland water.
Preferably, described first block dirty airflow fence or described second block dirty airflow fence by being arranged on the float of upper end, the weight of the mesh sheet at middle part and lower end is interconnected to form, and by the connection of soft contact rope between described adjacent net pieces.
Arrange like this and described first can be made to block dirty airflow fence or described second block the fluctuation with the fluctuation of water body water level of dirty airflow fence, effectively stop floating matter, described first block dirty airflow fence or described second and block dirty airflow fence there is water flow controlling effect simultaneously.
Preferably, the riverbed of described B district and D district artificial aeration section is provided with atomization aeration tube by pipeline communication to riverbank being arranged on the aerator pump in plenum chamber.
Preferably, in described C district, flow path direction arranges a water lift aerator every 70-100 rice along the river; At least one plugflow aeration machine is respectively provided with at regular intervals to plug-flow aeration in the middle part of C district at the two ends in described C district.
Preferably, bottom the riverbank in the middle part of described C district, be also provided with allogenic water drainage tube, when water level is too low, introduce allogenic water every day at times to the water body water distribution of C district, the stability of the artificial aquatic ecosystem constructed by guarantee.
Preferably, the overall footprint of described stereo ecological platform is at least 25 ~ 30% of C district river course water surface area.
Preferably, one or more in parasol grass, calamus, cattail, Spiked Loosestrife and iris are planted in described stereo ecological platform upper end, and lower end hangs artificial aquatic weed.
Preferably, described submerged plant be black algae, comb tooth Herba potamogetonis distincti, hornwort and watermifoil one or more.
For protection water quality; improve the species diversity of water ecosystem; improve the biologic chain of water ecosystem; nutritive element for river course exports and creates conditions; except improving Submerged plant communities structure, improving except the function that purifies water of Submerged plant communities in river course; the kind being of value to ecosystem water purification function and playing must being increased, eating the fish silver carp of algae as put filter in right amount in a suitable place to breed, ingest the snakehead etc. of considering broken close silver xenocypris to be worth doing and eating small fish, to control the generation of " blue-green alga bloom ".Forbid to put herbivorous fishes in a suitable place to breed as grass carp etc.
The invention has the beneficial effects as follows:
Before first, before heavy pond or second, heavy pond is set to the flow velocity slowing down water body, the silt etc. carried in water body is settled down, improve the clarity of water body, and block dirty airflow fence or second by first to block dirty airflow fence floating matter is tackled, rough purification filtration is carried out to the streamflow flowing through tidal city;
Second and the 3rd adjustable type retaining dam not only play the effect of water level in maintenance, regulation and control B district, C district and D district; and pour in down a chimney when effectively can stop upstream high pollution river and high tide into reparation district, river course, the envrionment conditions needed for the Freshwater ecosystem that protection builds maintains is not by strong disturbance and destruction.
Artificial aeration's section is increased by dissolved oxygen amount in river water by the means of aerator forced aeration, to provide oxygen to the bacterium be arranged on the artificial aquatic weed of two artificial aeration zone sections, smooth formation microbial film, carry out conversion to ammonia nitrogen in water body and small organic molecule to decompose, final pollution group is just decomposed and changes into the N of effusion water body 2, CO 2and H 2o.
In a word, the inventive method in conjunction with ecological method, urban life highly polluted for coastal cities tidal river reach and production waste is carried out purifying treatment by sectional, not only effectively reduce the discharge of city rivers pollution thing and enter river mouth, and river, beautifying city to a great extent, indirectly improve city river social service function.
Accompanying drawing explanation
Fig. 1 is the structural representation of multistage composite strengthened purification system in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method.
Fig. 2 first blocks the structural representation that dirty airflow fence or second blocks dirty airflow fence in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method.
Fig. 3 be B section and D section in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method strengthened purification pond in the floor map of artificial aquatic weed section.
Fig. 4 be B section and D section in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method strengthened purification pond in the aerating apparatus structural representation of artificial aeration's section.
Fig. 5 be B section and D section in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method strengthened purification pond in external water source to meet an urgent need supplementary device structural representation.
Fig. 6 is the two dimensional structure schematic diagram in the Water quality restoration district of C section in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method.
Fig. 7 is the Water quality restoration district submerged plant planting distribution schematic diagram of C section in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method.
Fig. 8 is the Water quality restoration district floatingleaved plant plantation distribution schematic diagram of C section in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method.
Fig. 9 is the schematic diagram of the Water quality restoration district ecological floating island set-up mode of C section in an embodiment of tidal waterway, coastal cities of the present invention multistage composite intensified purification method.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
As shown in Figure 1,
In one embodiment, a kind of tidal waterway, coastal cities multistage composite intensified purification method, utilize the method for river course subregion, the river of high-pollution load is made to enter repair system step by step, form the water quality complex repairation system that suspended substance sedimentation-organic matter removal-nitrogen and phosphorus load is cut down, and in conjunction with the design of artificial Ecology view, reach city river water quality and repair the object with beautification of landscape, mainly comprise the following steps:
Step one, carries out Region dividing by tidal waterway, described coastal cities, is divided into A district 1, B district 2, C district 3, D district 4 and E district 5 from its estuario successively to upstream;
Step 2, arranges the first adjustable type retaining dam 6 between described A district and downstream tidal river reach, and described A district and B interval arrange the second adjustable type retaining dam 7; E district and D interval arrange between the 3rd adjustable type retaining dam 8, E district and upper river and arrange the 4th adjustable type retaining dam; The first adjustable type retaining dam in A district directly invades Water quality restoration district for intercepting downstream salt water at the incoming tide, and the 4th paramodulant retaining dam in E district directly enters Water quality restoration district for intercepting upstream burst Pollution thing, affects the stability of the Freshwater ecosystem; Second and the three the second and the 3rd adjustable type retaining dam is mainly used in urban waterlogging and immense floods prevail time, the maintenance of river course flood discharge function;
The seawater that first retaining dam in A district is mainly used in intercepting downstream high salinity at the incoming tide directly invades Water quality restoration district, and the seawater Freshwater ecosystem of supersalinity has destructive impact; 4th retaining dam in E district directly enters Water quality restoration district for intercepting upstream high loading pollutent, high loading polluted-water directly enters Water quality restoration district, water transparency can be caused to decline, algae grows reduction Dissolved Oxygen in Water in a large number, directly affects the stability of the aquatic macrophyte in Water quality restoration district, zoobenthos and Fish Communities etc.;
Step 3, arranges first near the second adjustable type retaining dam place and blocks dirty airflow fence 12 in described A district, arranges second block dirty airflow fence 13 in described E district near the 3rd adjustable type retaining dam place;
Step 4, forms heavy pond 10 before first in described A district, and before described first, heavy pond is arranged on described first adjustable type retaining dam and described first and blocks between dirty airflow fence; Form heavy pond 11 before second in E district, and before described second, heavy pond is arranged on described 4th adjustable type retaining dam and described second and blocks between dirty airflow fence; (as shown in Figure 2)
First adjustable type retaining dam-four adjustable type retaining dam also plays the effect maintaining and regulate and control water level in A district, B district, C district, D district and E district; the artificial aquatic ecosystem that Conservative restoration section builds maintains enough water levels, and the Freshwater ecosystem in protection Water quality restoration district is brought into normal play function.
Step 5, forms strengthened purification pond in described B district and D district, arranges multiple artificial aquatic weed section and multiple artificial aeration's section in each strengthened purification pond respectively; Described artificial aquatic weed section 14 and artificial aeration's section 15 are mainly used in reducing the organic content in water body, the river in B district described in strengthened purification and D district;
As shown in Figure 4, in an embodiment, artificial aeration's section is increased by dissolved oxygen amount in river water by the means of aerator forced aeration, wherein, existing aerator comprises resistance control valve 26, air compressor machine 27, gas tank 28, under meter 29 and aeration total pipeline 30, to provide oxygen to the bacterium be arranged on the artificial aquatic weed of two artificial aeration zone sections, forms microbial film, on a biomembranous section, by outer and in define aerobic, amphimicrobian and anaerobism three kinds of reaction zones.
In aerobic zone, mineralized nitrogen is nitrate by aerobic bacteria, and small organic molecule be converted into carbonic acid gas and water (inorganic phosphorus be converted into ATP in cell paste); In anaerobic zone, nitrate is converted into nitrogen and oxygen (larger molecular organics that difficulty is decomposed is decomposed into degradable small organic molecule) by anerobe.Final pollution group is just decomposed and changes into the N of effusion water body 2, CO 2and H 2o.
As shown in Figure 3, in an embodiment, ecological grass microbial film mounting means be by coagulation stake river course drift type lay, stake is precast reinforced coagulation structure, ecological grass microbial film specification be every bar 1 meter long, 0.05 meter wide.Often arrange ecological grass microbial film 23 to be worn into by every bar ecological grass microbial film by rope 24, every bar ecological grass is biomembranous is spaced apart 0.1 meter.Often arrange ecological grass microbial film to be fixed by Prefabricated Reinforced Concrete Square Pile 25.
Step 6, multiple submerged plant and emergent are planted in the riverbed in described C district; Its water surface arranges stereo ecological platform plantation watercress 44; To release in described C district multiple fish and Benthic Aquatic; In described C district and described B interval, described C district and described D district critical part arrange porous Ecological Wall 18;
As shown in Figure 9, in one embodiment, the riverbed in C district is planted multiple submerged plant and emergent 44, wherein, submerged plant is black algae 40, comb tooth Herba potamogetonis distincti 41, hornwort 42 and watermifoil 43 spaced apart plantation successively; And arrange artificial aquatic weed in the below of stereo ecological platform, artificial aquatic weed is formed for connecting many ecological grass microbial films 23 by rope 24.
Porous ecological brick forms through roasting for main raw material with clay, shale, coal gangue, flyash, be mainly used in the brick of weight bearing area, external form is right angle hexahedron, and technical process is: determine masoning method → mixing mortar → profit brick → select brick and row's brick → masonry panel.The upper and lower fissure of displacement of masonry, inside and outside take block, adopt and one build form along a fourth, plum blossom fourth or three along a header.
As shown in Figure 6 and Figure 7, after the purifying treatment at two ends, C district, in river course, Water quality reaches waterplant and zoic needs substantially, therefore in C district, arranges multiple stereo ecological platform 38, and suitably plants planting submerged plant and floatingleaved plant.Wherein, submerged plant can absorb in water the effect of imitating oxygen with the nutritive substance such as nitrogen, phosphorus in substrate, feedwater height, reducing water body recovery technology concentration, suppressing the development of algae and construction lake surface view in a large number; Floating leaf flower plant 39 not only has good beautification of landscape effect, and root system and floating leaf back can absorb the nutritive substance in water body and mud, have certain detergency to upper strata water body; Stereo ecological platform utilizes the combined action of microorganism in emergent, plant root-zone microorganism, biofilm carrier to the absorption of water body Middle nutrition material and pollution substance, decomposition, digestion to realize the object of purification of water quality.
Wherein, described first ~ four adjustable type retaining dam is when running into urban waterlogging and sudden flood, and regulating gate is opened completely, completes prevention waterlogging of drainning off floodwaters, and all the other Timing discharges, to provide metastable water surrounding, support the stable of the Freshwater ecosystem.
In one embodiment, it is 1.5% that the length in described A district or described E district accounts for the length percent of tidal waterway minimum, is 5% to the maximum; It is 15% that the length in described B district or described D district accounts for the length percent of tidal waterway minimum, is 20% to the maximum; Residue section is described C district.
In one embodiment, the height of described first adjustable type retaining dam, leads to the maximum value of the nearly 10 years tide records in coastal cities; The height of the second adjustable type retaining dam, higher than the maximum value of coastal cities history tide record; The height of the 3rd adjustable type retaining dam, higher than the maximum stage value of wet season river course upland water; The height of described 4th adjustable type retaining dam, higher than the maximum stage value of wet season river course upland water.
As shown in Figure 2, wherein, in an embodiment, described first block dirty airflow fence or described second block dirty airflow fence by being arranged on the float 19 of upper end, the weight 22 of the mesh sheet 21 at middle part and lower end is interconnected to form, and connected by soft contact rope 20 between described adjacent net pieces.
Arrange like this and described first can be made to block dirty airflow fence or described second block the fluctuation with the fluctuation of water body water level of dirty airflow fence, effectively stop floating matter, described first block dirty airflow fence or described second and block dirty airflow fence there is water flow controlling effect simultaneously.
In one embodiment, the riverbed of described B district and D district artificial aeration section is provided with atomization aeration tube and is communicated to the aerator pump 16 riverbank is arranged in plenum chamber by pipeline 17.
In one embodiment, in described C district, flow path direction arranges a water lift aerator 36 every 70-100 rice along the river; At least one plugflow aeration machine 35 is respectively provided with at regular intervals to plug-flow aeration in the middle part of C district at the two ends in described C district.
In one embodiment, allogenic water drainage tube is also provided with and external water source enters river mouth 37 bottom riverbank in the middle part of described C district, when water level is too low, introduce allogenic water every day at times to the water body water distribution of C district, the stability of the artificial aquatic ecosystem constructed by guarantee.As shown in Figure 5, a kind of external water source is met an urgent need supplementary device, it comprise external water source enter river pipeline 34 and control discharge disposed thereon rotary valve 31, reel rope 32 and trapped line pressure valve 33.
In one embodiment, the overall footprint of described stereo ecological platform is at least 25 ~ 30% of C district river course water surface area.
As shown in Figure 8, in one embodiment, one or more in parasol grass, calamus, cattail, Spiked Loosestrife and iris are planted in described stereo ecological platform upper end, and lower end hangs artificial aquatic weed.
As shown in Figure 8, in one embodiment, described submerged plant be black algae 40, comb tooth Herba potamogetonis distincti 41, hornwort 42 and watermifoil 43 one or more.
For protection water quality; improve the species diversity of water ecosystem; improve the biologic chain of water ecosystem; nutritive element for river course exports and creates conditions; except improving Submerged plant communities structure, improving except the function that purifies water of Submerged plant communities in river course; the kind being of value to ecosystem water purification function and playing must being increased, eating the fish silver carp of algae as put filter in right amount in a suitable place to breed, ingest the snakehead etc. of considering broken close silver xenocypris to be worth doing and eating small fish, to control the generation of " blue-green alga bloom ".Forbid to put herbivorous fishes in a suitable place to breed as grass carp etc.
The invention has the beneficial effects as follows:
Before first, before heavy pond or second, heavy pond is set to the flow velocity slowing down water body, the silt etc. carried in water body is settled down, improve the clarity of water body, and block dirty airflow fence or second by first to block dirty airflow fence floating matter is tackled, rough purification filtration is carried out to the streamflow flowing through tidal city;
Second and the 3rd adjustable type retaining dam not only play the effect of water level in maintenance, regulation and control B district, C district and D district; and pour in down a chimney when effectively can stop upstream high pollution river and high tide into reparation district, river course, the envrionment conditions needed for the Freshwater ecosystem that protection builds maintains is not by strong disturbance and destruction.
Artificial aeration's section is increased by dissolved oxygen amount in river water by the means of aerator forced aeration, to provide oxygen to the bacterium be arranged on the artificial aquatic weed of two artificial aeration zone sections, smooth formation microbial film, carry out conversion to ammonia nitrogen in water body and small organic molecule to decompose, final pollution group is just decomposed and changes into the N of effusion water body 2, CO 2and H 2o.
In a word, the inventive method in conjunction with ecological method, urban life highly polluted for coastal cities tidal river reach and production waste is carried out purifying treatment by sectional, not only effectively reduce the discharge of city rivers pollution thing and enter river mouth, and river, beautifying city to a great extent, indirectly improve city river social service function.
For protection water quality; improve the species diversity of water ecosystem; improve the biologic chain of water ecosystem; nutritive element for river course exports and creates conditions; except improving Submerged plant communities structure, improving except the function that purifies water of Submerged plant communities in river course; the kind being of value to ecosystem water purification function and playing must being increased, eating the fish silver carp of algae as put filter in right amount in a suitable place to breed, ingest the snakehead etc. of considering broken close silver xenocypris to be worth doing and eating small fish, to control the generation of " blue-green alga bloom ".Forbid to put herbivorous fishes in a suitable place to breed as grass carp etc.
Be more than the healthy ecology environment tentatively being built tidal city river by the inventive method, the permanently effective development of ecotope be kept also to need to carry out reasonable management and maintenance to ecological engineering:
After Health-Ecosystem based on aquatic vegetation is set up, the maintenance management of the long-acting management of the ecosystem, especially aquatic vegetation particularly submerged vegetation is the most important, only has and has managed aquatic vegetation, the structure of the ecosystem just can be made more reasonable, and function more effectively plays.
Organize content mainly contains following several aspect:
1. aquatic vegetation management
1. regulate and control the structure of community of submerged plant, ensureing that Submerged plant communities structure is based on warm-season plant, is auxiliary with cold season plant;
2. regulate and control distribution and the coverage of aquatic vegetation, make it meet the demand maintaining healthy water body ecosystem balance;
3. the thread algae etc. affecting submerged plant growth is removed in time;
4. remove the deadwood and rotten leaf of submerged plant and littoral floatingleaved plant in lake in time, prevent secondary pollution, export N, P nutritive substance simultaneously, reduce water nutrition load;
2. the management of hydrocoles
1. according to the Population fluctuation situation of hydrocoles, by fishing for or put in a suitable place to breed its Population fluctuation of multiplication regulatory;
2. must pay close attention to predacious fish and the Population fluctuation eating chip fish, under any circumstance all must ensure that they have enough population quantities and diversity;
3. preferably delimiting the fishing game preserve closed in waters, mustn't go fishing with external water area in this region;
4. must ensure that bed mud top layer is in aerobic state.
3. aerator and microbial film management
1. make regular check on artificial bio-membrane's membrane carrier, should repair if any damage in time or change;
2. according to biofilm development situation, with manually stirring support methods gently peels off aging microbial film.
3. make regular check on aerator and aeration tube, should repair if any damage in time or change;
4. water lift aerator and submersible plugflow aeration machine should be opened by day, and close in the evening, if when running into emergency case as heavy rain weather, need to close each aerator in time;
4. water body environment management
1. forbid to throw to water body lose rubbish, leftover and void excreta;
2. the water surface and water-bed dry branches and fallen leaves, plastics and various rubbish is removed in time;
3. algae, water silk floss, bristle algae etc. are removed in time.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and shown here embodiment.

Claims (10)

1. the multistage water quality complex intensifying in tidal waterway, coastal cities purifying method, it is characterized in that the method utilizing river course subregion, the river of high-pollution load is made to enter repair system step by step, form the water quality complex repairation system that suspended substance sedimentation-organic matter removal-nitrogen and phosphorus load is cut down, mainly comprise the following steps:
Step one, carries out Region dividing by tidal waterway, described coastal cities, is divided into A district, B district, C district, D district and E district from its estuario to upstream successively;
Step 2, arranges the first adjustable type retaining dam between described A district and downstream tidal river reach, and described A district and B interval arrange the second adjustable type retaining dam; E district and D interval arrange the 3rd adjustable type retaining dam, arrange the 4th adjustable type retaining dam between E district and upper river;
Step 3, arranges first near the second adjustable type retaining dam place and blocks dirty airflow fence in described A district, arranges second block dirty airflow fence in described E district near the 3rd adjustable type retaining dam place;
Step 4, forms heavy pond before first in described A district, and before described first, heavy pond is arranged on described first adjustable type retaining dam and described first and blocks between dirty airflow fence; Form heavy pond before second in E district, and before described second, heavy pond is arranged on described 4th adjustable type retaining dam and described second and blocks between dirty airflow fence; ;
Step 5, forms strengthened purification pond in described B district and D district, arranges multiple artificial aquatic weed section and multiple artificial aeration's section in each strengthened purification pond; Described artificial aquatic weed section and artificial aeration's section are mainly used in reducing the organic content in water body, and the organism in described B district and D district in river is removed in strengthening;
Step 6, multiple submerged plant and emergent are planted in the riverbed in described C district; Its water surface arranges stereo ecological platform plantation happiness water class plant; To release in described C district multiple fish and Benthic Aquatic; In described C district and B interval, described C district and the interval critical part of D arrange porous Ecological Wall;
Wherein, described first ~ four adjustable type retaining dam is when running into urban waterlogging and sudden flood, and regulating gate is opened completely, completes prevention waterlogging of drainning off floodwaters, and all the other Timing discharges, to provide metastable water surrounding, support the stable of the Freshwater ecosystem.
2. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 1, is characterized in that, it is 1.5% that the length in described A district or described E district accounts for the length percent of tidal waterway minimum, is 5% to the maximum; It is 15% that the length in described B district or described D district accounts for the length percent of tidal waterway minimum, is 20% to the maximum; Residue section is described C district.
3. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 2, it is characterized in that, the height of described first adjustable type retaining dam, leads to the maximum value of the nearly 10 years tide records in coastal cities; The height of the second adjustable type retaining dam, higher than the maximum value of coastal cities history tide record; The height of the 3rd adjustable type retaining dam, higher than the maximum stage value of wet season river course upland water; The height of described 4th adjustable type retaining dam, higher than the maximum stage value of wet season river course upland water.
4. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 3, it is characterized in that, described first block dirty airflow fence or described second block dirty airflow fence by being arranged on the float of upper end, the weight of the mesh sheet at middle part and lower end is interconnected to form, and being connected by soft contact rope between described adjacent net pieces, promoting particulate matter sedimentation by affecting partial water dynamic condition.
5. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 5, is characterized in that, the riverbed of described B district and D district artificial aeration section is provided with atomization aeration tube by pipeline communication to riverbank being arranged on the aerator pump in plenum chamber.
6. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 5, it is characterized in that, in described C district, flow path direction arranges a water lift aerator every 70-100 rice along the river; At least one plugflow aeration machine is respectively provided with at regular intervals to plug-flow aeration in the middle part of C district at the two ends in described C district.
7. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 6, it is characterized in that, allogenic water drainage tube is also provided with bottom riverbank in the middle part of described C district, when water level is too low, introduce allogenic water every day at times to the water body water distribution of C district, the stability of the artificial aquatic ecosystem constructed by guarantee.
8. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 6, it is characterized in that, the overall footprint of described stereo ecological platform is at least 25 ~ 30% of C district river course water surface area.
9. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 6, is characterized in that, one or more in described stereo ecological platform upper end plantation parasol grass, calamus, cattail, Spiked Loosestrife and iris, and lower end hangs artificial aquatic weed.
10. tidal waterway, coastal cities multistage composite intensified purification method as claimed in claim 6, is characterized in that, described submerged plant be black algae, comb tooth Herba potamogetonis distincti, hornwort and watermifoil one or more.
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