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A method for improving eutrophic water body substrate and reshaping terrain

A bottom quality improvement and water body technology, applied in water conservancy projects, water conservancy engineering equipment, climate change adaptation, etc., can solve the problems of weak theoretical research and few researches, and achieve increased survival rate, reduced cost, and improved lake tourism landscape effect Effect

Active Publication Date: 2020-04-03
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the whole, there are not many studies on the purpose of governance through terrain restoration, and the theoretical research is weak.

Method used

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  • A method for improving eutrophic water body substrate and reshaping terrain
  • A method for improving eutrophic water body substrate and reshaping terrain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] From 2010 to 2015, in the construction of the water environment improvement and ecological restoration project in the northern area of ​​Gehu Lake and the study of environmental and ecological benefits, the method of improving the eutrophic water body bottom and reshaping the terrain was applied. The specific plan is as follows:

[0050] (1) From 2010 to 2011, first obtain the three-dimensional flow velocity field information in the northern lake area of ​​Gehu Lake: investigate the underwater topography in the northern lake area of ​​Gehu Lake, use the three-dimensional environmental fluid dynamics model (EFDC) system analysis, and obtain it through hydrodynamic module modeling The distribution characteristics of the three-dimensional velocity field in the northern lake area of ​​Gehu Lake;

[0051] Obtain the quantity and distribution information of biological species in the northern lake area of ​​Gehu Lake;

[0052] Obtain water quality information in the northern l...

Embodiment 2

[0082] In the "South Lake Bottom Sediment Pollution Control Project" in Binhai County, Yancheng City, Jiangsu Province, this eutrophic water body bottom quality improvement and terrain reshaping method was used to control the bottom sediment of the South Lake with a total area of ​​about 19.09 ha. , including:

[0083] (1) First obtain the three-dimensional flow velocity field information of Nanhu Lake: investigate the underwater terrain of Nanhu Lake, use the three-dimensional environmental fluid dynamics model (EFDC) system analysis, and obtain the distribution characteristics of the three-dimensional flow velocity field of Nanhu Lake through hydrodynamic module modeling;

[0084] Obtain the quantity and distribution information of biological species in South Lake;

[0085] Obtain water quality information of Nanhu Lake: the water quality information is transparency and distribution information;

[0086] (2) Comprehensive dredging was carried out in the Nanhu area, and the ...

Embodiment 3

[0114] This eutrophic water body improvement and terrain reshaping method was also used in Qingshui Lake in Binhai County, Yancheng City, Jiangsu Province, and achieved good results. After terrain reshaping, the survival rate of aquatic plants in this water area increased 65%, the biodiversity index increased by 30%, and its endogenous pollution decreased by 90%.

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Abstract

A method for improving bottom quality and remodeling topography of eutrophic water includes the steps of obtaining a three-dimensional flow velocity field, biological species and water quality information; (2) dredging and removing the mud at the bottom; (3) constructing ecological stable ditches; (4) constructing eco-dark islands and determining the distribution of the eco-dark islands and the relationship between the eco-dark islands and ecological stable ditches according to water quality and biological species; constructing the bottom mud excavated during the construction of the ecologicalstable ditches and the excavated mud which is turned upside down in the step (2) and piling up the mud to construct the eco-dark islands; (5) planting aquatic plants on the surface of the eco-dark islands. The method of the invention can achieve the improvement of the water bottom quality, the improvement of hydrodynamic conditions and the promotion of tourist landscape effect while reaching theecological restoration destination, not only greatly reduces the cost of mud transportation, but also creates better environmental conditions for the subsequent water quality improvement and ecological restoration, reduces the endogenous pollution sources, and makes the water quality long-term and stable.

Description

technical field [0001] The invention belongs to the technical field of water body ecological restoration, and in particular relates to a method for improving the bottom quality of eutrophic water bodies and reshaping terrain applicable to lakes, reservoirs, river courses and the like. Background technique [0002] The treatment of the lake bottom basement is an important part of the whole lake treatment process. As an important carrier of lake endogenous pollutants, it will cause more serious pollution effects when the lake pollutants are excessive, but the lake bottom sediment is also a source of benthic organisms. Provide habitat and attachment space with aquatic plants, and give them the nutrients they need to survive. Existing research results have proved that the diversity of habitats can be achieved by controlling the lake bottom mud to achieve biological diversity, thereby achieving the purpose of improving water quality and inhibiting cyanobacteria blooms through abu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B1/00E02B3/02E02D3/12E02B3/12
CPCE02B1/00E02B3/02E02B3/128E02D3/12Y02A10/00
Inventor 潘继征杨鸿山徐力刚徐红玲赵敏
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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