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Compound ecological restoration method for lakeside zone of shallow lake

An ecological restoration and lakeside belt technology, applied in the field of surface water treatment, can solve the problems of improper technology selection, lack of systematic and long-term consideration, limited absorption capacity of pollution sources, etc., to achieve a short ecological restoration cycle, improve ecological landscape, and governance effects significant effect

Inactive Publication Date: 2021-09-10
广西壮族自治区自然资源生态修复中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although lake ecological restoration is considered to be the main means of controlling lake eutrophication, when implementing lake ecological restoration projects, due to various reasons, insufficient restoration measures are still taken. For example, the so-called biological floating island technology has not been adopted. Sufficient intensity or quantity of biological measures, the ability to absorb pollution sources is extremely limited, and cannot fundamentally reverse the process of lake eutrophication
On the other hand, the research and engineering practice of lake eutrophication control technology focus more on a single element, ignoring the overall function of the ecosystem; improper technology selection, lack of coupling and integration research on various technologies, and engineering measures The applicability of different technologies, the integrated application of different technology combinations and the impact of engineering technology measures on the overall function of the lake ecosystem are not enough, which leads to the lack of systematic and long-term consideration of technology application and engineering practice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for composite ecological restoration of shallow lake lakeside zone, comprising the following steps:

[0034] (1) Select the area with a water depth of 1-4m, water quality with eutrophication, sediment rich in nutrients, silt deposition of 20-40cm, affected by river sewage, and seriously polluted as the restoration area;

[0035] (2) Use amphibious dredging machinery to carry out ecological dredging along the shore to 50-100 meters in the lake, with a dredging depth of 50±5cm; then set up a planting soil layer and a nutrient release layer at the bottom of the restoration area from top to bottom ;

[0036] (3) Plant pioneer submerged plants and emergent plants along the edge of the repaired area as biological dams; plant submerged plants on the planting soil layer in the middle of the repaired area, and plant emergent plants on the planting soil layer near the edge of the repaired area water plants;

[0037] (4) Microorganisms, benthic animals, shellfish, fish,...

Embodiment 2

[0046] Compared with Embodiment 1, the difference of this embodiment is:

[0047]The pioneer submerged plant is bitter grass, which is planted 3.0m below the normal water level, and the planting area is 30% of the restoration area.

[0048] Described emergent plant is Acorus calamus, is planted in 0.5m below normal water level.

[0049] The submerged plants are black algae, and the setting area is 68% of the restoration area;

[0050] Described emergent plant is water lily.

[0051] The floating leaf plants are duckweed and water hyacinth.

Embodiment 3

[0053] Compared with Embodiment 1, the difference of this embodiment is:

[0054] The pioneer submerged plant is bitter grass, which is planted 2.2m below the normal water level, and the planting area is 26% of the restoration area.

[0055] The emergent plant is Calamus calamus, which is planted 0.3m below the normal water level.

[0056] Described submerged plants are black algae and foxtail algae, and the setting area is 55% of the restoration area;

[0057] Described emergent plants are water lilies and king lotus.

[0058] The floating leaf plants are duckweed and water chestnut.

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Abstract

The invention discloses a compound ecological restoration method for a lakeside zone of a shallow lake, which takes pioneer submerged plant species, emergent aquatic plant species and submerged plants as cores, constructs an aquatic plant community, forms key factors for maintaining the structure and the function of an aquatic ecosystem, and combines ecological restoration technologies such as microorganisms, fishes, shellfishes and aquatic plants, on one hand, pollution indexes such as ammonia nitrogen and total phosphorus in the water body are deeply purified, and on the other hand, the balance of a lake ecosystem is kept. Meanwhile, the planted aquatic plants have good ornamental value, the ecological landscape of the lakeside zone is effectively improved, and the diversity of organisms such as birds, plants and aquatic organisms in the lakeside zone is recovered.

Description

technical field [0001] The invention belongs to the technical field of surface water treatment, and in particular relates to a method for composite ecological restoration of lakeshore zones of shallow lakes. Background technique [0002] my country is a country with many lakes, the environment of the lakes is very fragile, the sources of nutrients in the lakes are wide, the background concentration is abnormally high, the process of eutrophication of the lakes is rapid, and many lakes are already in a state of eutrophication, the eutrophication of the lakes not only makes the water body lose Its due function also makes the aquatic ecological environment of the lake evolve in a direction that is not conducive to human survival and development, seriously affecting the sustainable development of social economy. Therefore, controlling the eutrophication process of lakes and carrying out effective governance and restoration is a great cause that benefits the present and will last ...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/32C02F3/34E02B1/00E02B3/00E02B3/02
CPCC02F3/302C02F3/327C02F3/34E02B1/00E02B3/00E02B3/02E02B3/023C02F2103/007
Inventor 黄瑜韦羡侠麦格赖斌谢绍英
Owner 广西壮族自治区自然资源生态修复中心
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