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Method for water purification and submerged vegetation restoration of water level controllable eutrophic water

A technology of eutrophication and water purification, which is applied in the field of submerged vegetation restoration and water purification, can solve the problems of high economic cost, inability to survive, and death of submerged plants, and achieve simple management, avoiding the release of nutrients, and post-maintenance costs low effect

Active Publication Date: 2016-10-26
无锡市太湖湖泊治理股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in eutrophic water bodies, many submerged plants cannot survive because they cannot tolerate high concentrations of nutrients
[0004] At present, there is no good technology and method for the rapid restoration of submerged vegetation in water bodies in my country. The main restoration method is to plant submerged plants by using various planting devices such as planting cups and planting beds and their improved devices. High, the recovery effect is not good
In the actual planting process, due to the lack of attention to plant configuration and plant pollution resistance, some submerged plants often die under the stress of high concentrations of nutrients during the recovery process, or are eliminated due to inferior interspecific competition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A specific method for water quality purification of eutrophic water bodies with controllable water level and submerged vegetation restoration is as follows:

[0040] (1) Investigation of the basic situation of the eutrophic water body to be repaired: The water body is a small river ditch with a length of about 20m and a width of 5m. The water level is controllable. The total nitrogen content of the water body fluctuates in the range of 3.56-3.98mg / L, and the annual water level change is 2.8m- 3.1m, the existing submerged vegetation in the river has a single species and less biomass.

[0041] (2) Waterweed selection: Choose common Myriophyllum spiculata, Hydrilla verticillata, Ceratophyllum, Vallisneria, Vallisneria denticulata, Vallisneria japonicus, and Valencia spp. as submerged plants for restoration.

[0042] (3) Vegetation restoration plan: pump the water in the ditch to be repaired to about 10cm, and plant the bitter grass by sowing. The sowing density of bitter grass i...

Embodiment 2

[0055] A specific method for water quality purification of eutrophic water bodies with controllable water level and submerged vegetation restoration is as follows:

[0056] (1) Investigation of the basic situation of the eutrophic water body to be repaired: the water body is a small river ditch, about 20m long, 5m wide, and the water level is controllable. The total nitrogen content of the water body fluctuates in the range of 3.52-3.95mg / L, and the annual water level change is 2.8m- 3.2m, the existing submerged vegetation in the river has a single species and less biomass.

[0057] (2) Waterweed selection: Choose common Myriophyllum spiculata, Hydrilla verticillata, Ceratophyllum, Vallisneria, Vallisneria denticulata, Vallisneria japonicus, and Valencia spp. as submerged plants for restoration.

[0058] (3) Vegetation restoration plan: pump the water in the ditch to be repaired to about 10cm, and plant the bitter grass by sowing. The sowing density of bitter grass is about 0.06g / m ...

Embodiment 3

[0071] A specific method for water quality purification of eutrophic water bodies with controllable water level and submerged vegetation restoration is as follows:

[0072] (1) Investigation of the basic situation of the eutrophic water body to be repaired: The water body is a small river ditch, about 23m long, 4.5m wide, and the water level is controllable. The total nitrogen content of the water body fluctuates in the range of 3.53-3.97mg / L, and the annual water level change is 2.6m. -3.2m, the existing submerged vegetation in the river has a single species and a small biomass.

[0073] (2) Waterweed selection: Choose common Myriophyllum spiculata, Hydrilla verticillata, Ceratophyllum, Vallisneria, Vallisneria denticulata, Vallisneria japonicus, and Valencia spp. as submerged plants for restoration.

[0074] (3) Vegetation restoration plan: pump the water in the ditch to be repaired to about 10cm, and plant the bitter grass by sowing. The planting density of Vallisneria is about 0...

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Abstract

The invention provides a method for water purification and submerged vegetation restoration of water level controllable eutrophic water. The method includes the steps of (1) survey on basic information of to-be-restored eutrophic water; (2) aquatic plant selection: selecting myriophyllum spicatum, hydrilla varticillata, ceratophyllum demersum, vallisneria natans, vallisneria spinulosa, vallisneria denseserrulata, potamogeton wrightii morong and potamogeton maackianus; (3) vegetation restoration method: adopting a water level control and plant disposition combined method to carry out submerged vegetation restoration and water purification; (4) maintenance and management: after restoration of aquatic vegetation, performing simple control in interspecific competition of submerged plants to assure water quality and biodiversity of submerged plants. Through the water level control and plant disposition combined method for submerged vegetation restoration and water purification, the problems of slow restoration of submerged vegetation and low survival rate of submerged plants in the prior art are solved. The problem that weak submerged plants are low in survival rate and even die due to interspecific competition and the like when grown at the same time in the prior art is solved.

Description

Technical field [0001] The invention belongs to the technical field of ecological restoration engineering, and specifically relates to a method for water quality purification of a water-level controllable eutrophic water body and submerged vegetation restoration. Background technique [0002] In recent years, due to the serious eutrophication of water bodies, its submerged vegetation zone has also been rapidly lost and degraded, leading to the collapse of ecosystems in many water bodies and almost losing their self-purification function. [0003] Therefore, in order to solve the problem of water eutrophication and restore the water ecosystem and self-purification function, it is first necessary to restore the submerged vegetation of the water body. The restoration of submerged vegetation is affected by many factors such as water transparency, water level fluctuations, dissolved oxygen, water quality, and substrate. Especially in eutrophic water bodies, many submerged plants cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32A01G1/00
CPCA01G22/00C02F3/32C02F3/322Y02W10/10
Inventor 黄晓峰邱伟建李海妮蔡琳琳钱程远郭赟李向阳蒋慕贤葛宇翔
Owner 无锡市太湖湖泊治理股份有限公司