CN211470935U - Shallow water artificial lake ecological restoration structure of system - Google Patents
Shallow water artificial lake ecological restoration structure of system Download PDFInfo
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- CN211470935U CN211470935U CN201922094975.6U CN201922094975U CN211470935U CN 211470935 U CN211470935 U CN 211470935U CN 201922094975 U CN201922094975 U CN 201922094975U CN 211470935 U CN211470935 U CN 211470935U
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- 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
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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Abstract
The utility model provides a shallow water artificial lake ecological remediation structure of system, include: arranging a marsh artificial wetland beside the original artificial lake and a plant grid arranged at the lake inlet of the original artificial lake; cofferdams are arranged around the repaired artificial lake to separate the artificial lake from the artificial wetland; planting soil is laid at the bottom of the artificial lake after dredging, and an underwater forest is planted at the bottom of the lake; arranging a fountain aerator in the artificial lake; aquatic plants are planted in the bottom mud with high water content in the cofferdam, ground cover plants are densely planted at the top of the cofferdam, and emergent aquatic plants are densely planted on the side slope. The utility model discloses can reduce artifical lake outside non-point source effectively and pollute, improve water self-purification ability, resume biological diversity, reinforcing ecosystem functional stability promotes the ecological landscape effect in lake region.
Description
Technical Field
The utility model relates to a shallow water artificial lake ecological remediation structure of system.
Background
With the development of socio-economic and the improvement of living environment of people, people are increasingly aware of the important role of park water systems in regulating microclimate, beautifying landscape and protecting biodiversity. Therefore, the construction party increasingly uses the landscape water system of the garden as the construction spot of public activity parks, school parks, office parks, residential parks and the like, and related cases are more and more.
However, due to the shortage of the ecological construction technology and the water pollution control technology research by the construction party, the water quality of the domestic park water system is often deteriorated, the ecological system is degraded and the like, and the ecological landscape effect is high. Particularly, the landscape lake, namely the shallow artificial lake, which is taken as the core of the water system in the park has more outstanding problems due to the slow water flow rate, the longer water changing period and the like.
The shallow water artificial lake ecological restoration technology widely adopted at present mainly comprises three types: the method is a physical method, namely mechanical algae removal, sediment dredging, water diversion dilution and the like are carried out through engineering measures, but the method usually addresses both the symptoms and causes but not the root causes, and can only be used as an emergency measure for dealing with sudden water body pollution; the second is a chemical method, such as adding chemical agents to kill algae, adding iron salts to promote the precipitation of phosphorus, adding lime to denitrify, and the like, but the cost is high and secondary pollution is easy to cause; and thirdly, a biological-ecological method, such as stocking algae-controlling organisms, constructing artificial wetlands and aquatic vegetation, is a current research hotspot, but the currently domestic biological-ecological method is usually the application or simple combination of a single technology, and a systematic technical system for ecological restoration and function reconstruction of the shallow artificial lake is lacked.
SUMMERY OF THE UTILITY MODEL
For solving the artifical lake water quality of shallow water of garden and worsening and ecosystem degradation problem, the utility model provides a shallow water artifical lake ecological remediation structure of system can reduce artifical lake outside non-point source effectively and pollute, improves water self-purification ability, resumes biological diversity, reinforcing ecosystem functional stability, promotes the ecological landscape effect in lake district.
In order to achieve the above object, the utility model provides a pair of shallow water artificial lake ecological remediation structure of system, its technical scheme is:
the utility model provides a shallow water artificial lake ecological remediation structure of system which characterized in that includes:
arranging a marsh artificial wetland beside the original artificial lake and a plant grid arranged at the lake inlet of the original artificial lake; cofferdams are arranged around the repaired artificial lake to separate the artificial lake from the artificial wetland;
planting soil is laid at the bottom of the artificial lake after dredging, and an underwater forest is planted at the bottom of the lake;
arranging a fountain aerator in the artificial lake;
aquatic plants are planted in the bottom mud with high water content in the cofferdam, ground cover plants are densely planted at the top of the cofferdam, and emergent aquatic plants are densely planted on the side slope.
Furthermore, plant fences arranged at the lake inlet adopt closely planted emergent aquatic plants.
Further, the bottom sludge in the artificial wetland is formed by removing sludge with the thickness of 30-50 cm from the bottom of the artificial lake and then feeding the sludge into the artificial wetland.
The marsh wetland is located in a bay where the artificial lake is silted or basically silted before being repaired.
Further, according to the water quality on-line monitoring data, when the dissolved oxygen in water is less than a threshold value, the aeration device is started.
Furthermore, the bottom of the artificial lake is disinfected after dredging, and the planting soil is laid on the disinfected bottom mud.
Furthermore, the planting area of the submerged plants is 45-60% of the lake surface area.
Furthermore, in the repaired slope, most of the slope is grass slope entering water natural revetments, part of the serious scouring section is pine pile revetments, and the length of the pine pile revetments is not more than 30% of the total revetments.
Further, the average water depth of the artificial lake in autumn and winter is controlled to be 1.0-1.2 m, and the average water depth of the artificial lake in spring and summer is controlled to be 1.2-1.5 m.
The utility model systematically combs and optimizes the combination according to the technical characteristics and advantages of each measure in the biological-ecological method, and can effectively play the synergy between each measure. The ecological restoration structure of the artificial lake has self-restoration capability and self-purification capability, and has the advantages of low construction cost, low operation cost, obvious pollution control effect, ecological benefit and beautification effect; the method constructs the marsh wetland from the removed sludge in the lake bay, and realizes effective unification of garbage resource recycling and ecological landscape improvement.
Drawings
Fig. 1 is a general plan view of ecological restoration of a shallow artificial lake according to an embodiment of the present invention.
Fig. 2 is a typical sectional view of ecological restoration of bank slope of the embodiment of the utility model.
Fig. 2a is a typical section view of ecological restoration of a bank slope by adding pine piles on a revetment line on the basis of fig. 2.
Fig. 3 is a typical cross-sectional view of a plant fence according to an embodiment of the present invention.
Fig. 4 is a typical section view of the marsh wetland of the embodiment of the utility model.
Detailed Description
As shown in the figure, the ecological restoration structure of the shallow artificial lake comprises a marsh artificial wetland 101 arranged beside an original artificial lake and a plant grid 104 arranged at the lake inlet of the original artificial lake; cofferdams are arranged around the repaired artificial lake to separate the artificial lake from the artificial wetland; after dredging, planting soil 200 is laid at the bottom of the artificial lake, and an underwater forest 102 is planted at the bottom of the lake; a fountain aerator 105 is arranged in the artificial lake; aquatic plants 201 are planted in the high-water-content bottom mud in the cofferdam, emergent aquatic plants 202 are densely planted in the side slope, and ground cover plants 203 are densely planted at the top of the cofferdam.
Detecting a water body pollution index and a sediment pollution index of the shallow artificial lake before repairing; the water body pollution indexes comprise pH, conductivity, turbidity, chemical oxygen demand, ammonia nitrogen, total phosphorus, permanganate index and chlorophyll, and the sediment pollution indexes comprise organic matters and mercury.
The marsh gas artificial wetland 101 is positioned in a bay where the artificial lake is silted or basically silted before restoration. Constructing the cofferdam at the bay and removing and conveying the lake bottom sludge to the site selection of the marsh constructed wetland 101 when the shallow water artificial lake bottom sludge treatment and disposal comprises sludge removal with the thickness of 30-50 cm and substrate improvement; aquatic plants are planted on high-water-content bottom mud in the cofferdam, ground cover plants are densely planted on the top of the cofferdam, emergent aquatic plants are densely planted on the side slope, the improvement of the bottom quality is to add a disinfectant on the basis of clearing the lake bottom mud, and then planting soil 200 with the thickness of 20cm is paved.
For the marsh wetland, on the basis of tamping raw soil, 100-150cm artificial lake dredging bottom mud is sent, and then aquatic plants 201 are planted on the artificial lake dredging bottom mud to form the marsh wetland 101.
The plants selected for planting the aquatic plants 201 in the high-water-content bottom mud in the cofferdam comprise lotus, Nuphar pumilum, water lily and the like, the plants selected for planting the emergent aquatic plants 202 in the side slope in a close planting mode comprise Scirpus tabernaemontani, common snapdragon, thalictrum ramosissimum and the like, and the plants selected for planting the vegetation 203 in the top close planting mode in the cofferdam comprise radix ophiopogonis, bermuda koenigii and the like; the disinfectant is calcium hydroxide, and the dosage of the disinfectant is not less than 150g/m2The disinfectant is applied on sunny days, and the disinfectant is uniformly sprayed without omission.
The underwater forest 102 is planted by submerged plants 204, wherein the submerged plants are mainly dwarf cold-resistant sowthistle and are matched with a proper amount of the microdentate sonchifolia, and the planting area accounts for 5-20% of the area of the underwater forest.
Ecological restoration of the bank slope of the artificial lake comprises clearing the slope surface, keeping the natural revetment shape and increasing vegetation on the bank slope to fix soil. The selected plants include emergent aquatic plant 202 selected from Clematis chinensis, Acorus calamus, Iris floribunda, Phragmites communis, Scirpus validus, and Cymbopogon flexuosus, and the herb 203 selected from Ophiopogon japonicus and Cynodon dactylon.
As shown in fig. 2a, for a bank slope with relatively serious local scouring, pine piles 401 can be additionally arranged to fix soil.
The plant grid 104 is formed by densely planting large emergent aquatic plants 301 at the inlet of a water system into a lake to intercept and filter silt, organic matters, pesticides and other harmful substances which may enter a landscape lake and control non-point source pollution. The selected plants comprise Thalia dealbata and Phragmites communis, and the planting density of the Thalia dealbata is not less than 20 buds/clumps and 6 clumps/m2The planting density of the reeds is not less than 80 plants/m2。
The fountain aerator 105 as a reoxygenation aeration device starts the artificial oxygenation when the dissolved oxygen in water is less than 5.0 mg/L.
The utility model discloses an ecological remediation structure can also realize that biological operation handles 106, and biological operation handles and indicates to establish the perfect back at basic ecosystem, and benthonic animal and fish are put in a suitable place to breed. The benthonic animals select the periwinkle snails, the snails and the anodonta denticulata, the fish breeding variety is mainly silver carps and bighead carps, a small amount of grass carps, carps and crucian carps which are bred in a self-growing way are matched, and the adding ratio of the tail number is controlled to be 5-10%.
After the artificial lake is repaired, the daily water quality monitoring and operation management contents comprise reseeding and harvesting of aquatic plants, adjustment of aquatic animal community structures, water level regulation and the like. The average water depth of the artificial lake in autumn and winter is controlled to be 1.0-1.2 m, and the average water depth of the artificial lake in spring and summer is controlled to be 1.2-1.5 m.
When in construction, firstly, the silt is conveyed to the selected dead or basically dead end of the bay by a hydraulic flushing method, and then the rest bottom mud is disinfected and improved by throwing a disinfectant; after the substrate is improved, carrying out lake bottom submerged plant planting, bank slope soil-fixing plant planting and lake-inlet plant grid construction; when the submerged plants are planted, the initial water level is ensured to be about 50cm, the water level is kept for 3-5 days to ensure the survival of the submerged plants, then water is fed, and the next step of aquatic plant planting work is carried out after the water level rises by about 30cm until all planting work is finished; after the submerged plants grow by rooting, a fountain aerator is installed for aeration flow generation to improve the dissolved oxygen in water; after the basic water ecosystem is constructed completely, benthonic animals and fishes are put in a stocking way to form a perfect water ecosystem. After the ecological system of the shallow artificial lake is successfully restored, water quality monitoring and operation management should be strengthened daily.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art can change, add or replace the above examples within the scope of the present invention.
Claims (9)
1. The utility model provides a shallow water artificial lake ecological remediation structure of system which characterized in that includes:
arranging a marsh wetland beside the original artificial lake and a plant grid at the lake inlet of the original artificial lake; cofferdams are arranged around the repaired artificial lake to separate the artificial lake from the artificial wetland;
planting soil is laid at the bottom of the artificial lake after dredging, and an underwater forest is planted at the bottom of the lake;
arranging a fountain aerator in the artificial lake;
aquatic plants are planted in the bottom mud with high water content in the cofferdam, ground cover plants are densely planted at the top of the cofferdam, and emergent aquatic plants are densely planted on the side slope.
2. The ecological restoration structure of shallow artificial lake as claimed in claim 1, wherein the plant fence at the exit of lake is densely planted with emergent aquatic plants.
3. The shallow water artificial lake ecological restoration structure of the system as claimed in claim 1, wherein the bottom sludge in the artificial wetland is formed by removing sludge with a thickness of 30 cm-50 cm from the bottom of the artificial lake.
4. The shallow water artificial lake ecological restoration structure of the system according to claim 1, wherein the marsh wetland is located at a bay where the artificial lake is silted or substantially silted before restoration.
5. The shallow water artificial lake ecological restoration structure of the system as claimed in claim 1, wherein the aeration device is turned on when the dissolved oxygen in the water is less than the threshold value according to the water quality on-line monitoring data.
6. The ecological restoration structure for shallow artificial lake as claimed in claim 1, wherein the bottom of artificial lake is disinfected after dredging, and said planting soil is laid on the disinfected bottom mud.
7. The ecological restoration structure of shallow artificial lake as claimed in claim 1, wherein the planting area of submerged plant is 45% -60% of the lake surface area.
8. The shallow water artificial lake ecological restoration structure of the system of claim 1, characterized in that in the restored slope, most of the slope is grass slope entering water natural revetments, and the part of the serious scouring section is pine pile revetments, the length of which is no more than 30% of the total revetments.
9. The shallow water artificial lake ecological restoration structure of claim 1, wherein the average water depth of the artificial lake in autumn and winter is controlled to be 1.0-1.2 m, and the average water depth of the artificial lake in spring and summer is controlled to be 1.2-1.5 m.
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| CN201922094975.6U CN211470935U (en) | 2019-11-28 | 2019-11-28 | Shallow water artificial lake ecological restoration structure of system |
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| CN201922094975.6U CN211470935U (en) | 2019-11-28 | 2019-11-28 | Shallow water artificial lake ecological restoration structure of system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112340932A (en) * | 2020-10-15 | 2021-02-09 | 长江水利委员会长江科学院 | Method for improving and treating water quality of rainwater collection type reservoir |
| CN112746593A (en) * | 2020-12-25 | 2021-05-04 | 华南理工大学 | Construction method of low-maintenance ecological wetland |
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2019
- 2019-11-28 CN CN201922094975.6U patent/CN211470935U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112340932A (en) * | 2020-10-15 | 2021-02-09 | 长江水利委员会长江科学院 | Method for improving and treating water quality of rainwater collection type reservoir |
| CN112746593A (en) * | 2020-12-25 | 2021-05-04 | 华南理工大学 | Construction method of low-maintenance ecological wetland |
| CN112746593B (en) * | 2020-12-25 | 2021-11-02 | 华南理工大学 | Construction method of low-maintenance ecological wetland |
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Effective date of registration: 20201218 Address after: Floor 22, block B, Taihong International Plaza, 69 Shangding Road, Zhengdong New District, Zhengzhou City, Henan Province Patentee after: China power construction east China Survey and Design Institute (Zhengzhou) Co.,Ltd. Address before: 310014 No. 22 Chao Wang Road, Zhejiang, Hangzhou Patentee before: PowerChina Huadong Engineering Corp.,Ltd. |
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Granted publication date: 20200911 |