Diagnosis and evaluation method for water quality of eutrophic shallow lake subjected to ecological restoration

A technology of ecological restoration and eutrophication, applied in the direction of testing water, material inspection products, etc., can solve problems such as high requirements for personnel and equipment, long operation cycle, slow response to water quality conversion, etc.

Inactive Publication Date: 2011-05-11
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

At the same time, lake eutrophication belongs to the concept of ecology. Therefore, there are obvious disadvantages in diagnosing and evaluating the water quality of the eutrophic shallow lake ecosystem after the initial restoration and reconstruction through simple physical and chemical indicators.
However, the comprehensive nutritional status index (TLI) method for comprehensive evaluation of wa

Method used

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  • Diagnosis and evaluation method for water quality of eutrophic shallow lake subjected to ecological restoration
  • Diagnosis and evaluation method for water quality of eutrophic shallow lake subjected to ecological restoration
  • Diagnosis and evaluation method for water quality of eutrophic shallow lake subjected to ecological restoration

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Embodiment 1

[0026] The following steps are used to diagnose and evaluate the water quality of eutrophic shallow lakes after ecological restoration:

[0027] Step 1, adopting the Sapphire disk method to measure water body transparency, concrete method is referring to " water and waste water monitoring analysis method (fourth edition) " (Beijing: China Environmental Science Press, 2002), and water body transparency is expressed with Tsd;

[0028] Step 2, adopt 90% ethanol extraction method to measure water body chlorophyll a concentration, concrete method is referring to freshwater plankton research method (Beijing: Science Press, 1995), and water body chlorophyll a concentration expresses with Chla;

[0029] Step 3. Substitute the results measured in Step 1 and Step 2 into the following calculation formula:

[0030] LQI = Chla T sd

[0031] in:

[0032] LQI stands for Lake Water Quality Index;

[0033] Ch...

Embodiment 2

[0040] Based on the scientific and technological research project of Wuhan City "Key Technology of Lake Pollution Biological Manipulation and Diagnosis and Its Engineering Application", taking the water body of Ziyang Lake as the research object, through the integration of a series of biological manipulation and diagnosis technologies, the water quality can be improved and the water can be restored. The self-purification ability of the ecosystem, the application of the present invention to diagnose and evaluate the water quality of Ziyang Lake after ecological restoration, provides scientific and reasonable reference for the drafting of lake management measures after ecological restoration of Ziyang Lake and the selection and application of subsequent ecological engineering methods.

[0041] Ziyang Lake is located in Wuchang District, Wuhan City, Hubei Province, with a lake area of ​​15.46hm 2 , catchment area 306hm 2 , the lake shoreline is 2.65km long, and the lake volume is...

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Abstract

The invention provides a diagnosis and evaluation method for the water quality of an eutrophic shallow lake subjected to ecological restoration, which comprises the following steps of: selecting two factors, i.e. water transparency and chlorophyll a concentration which are important for water-quality improvement and stabilization in the ecological restoration process of the eutrophic shallow lake, comprehensively considering the interaction between the two factors, and establishing a water-quality diagnosis index-lake water quality index (LQI) of the eutrophic shallow lake subjected to the ecological restoration. The LQI can be used for quantitatively describing the conversion between the clean-water steady state and the muddy-water steady state of the eutrophic shallow lake so as to provide a visual and convenient diagnosis method for the water quality of the eutrophic shallow lake subjected to ecological restoration and also provide a scientific and reasonable reference basis for the drafting of management measures of the eutrophic shallow lake subjected to ecological restoration and the selection and the application of a subsequent ecological engineering method.

Description

technical field [0001] The invention relates to a method for diagnosing and evaluating the water quality of eutrophic shallow lakes after ecological restoration. Background technique [0002] Eutrophication is the phenomenon that under the influence of human activities, a large amount of nutrients such as nitrogen and phosphorus required by organisms enter slow-flowing water bodies such as lakes, estuaries, and bays, causing algae and other plankton to multiply rapidly, reducing dissolved oxygen in water bodies, and deteriorating water quality. , a phenomenon in which fish and other organisms die in large numbers. The salient feature of eutrophic water body is the occurrence of a large number of phytoplankton, which will lead to catastrophic consequences such as deterioration of water quality, decline of water body function, and death of aquatic organisms. It not only restricts the availability of lake resources, makes the water body lose its due function, and The ecologica...

Claims

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Application Information

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IPC IPC(8): G01N33/18
Inventor 邬红娟张体强
Owner HUAZHONG UNIV OF SCI & TECH
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