A Lake Nutritional State Evaluation Method and Its Application

A technology for nutritional status and evaluation methods, which is applied in the field of environmental science and monitoring, and can solve problems such as quantitative relationships that are not clearly given.

Active Publication Date: 2021-02-05
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there have been some reports on the relationship between specific phosphorus components in sediments and the eutrophication state of lakes, but the quantitative relationship between some specific phosphorus components in sediments and the eutrophication state of lakes has not been clearly given.

Method used

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  • A Lake Nutritional State Evaluation Method and Its Application
  • A Lake Nutritional State Evaluation Method and Its Application
  • A Lake Nutritional State Evaluation Method and Its Application

Examples

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Embodiment 1

[0071]The evaluation of the proportion of active monoester phosphorus in the sediments of Erhai Lake in Yunnan, the eutrophication state of the lake and the degree of phosphorus pollution in its sediments include the following steps:

[0072](1) Collection and pretreatment of sediment samples:

[0073]Gravity sediment core sampler is used to collect Erhai sediment samples, install 1cm or 5cm interval samples on site, and immediately put them into sealed bags for storage, use dry ice or ice packs to store at low temperature and transport them back to the laboratory. After the sediment samples were freeze-dried, they were ground through a 100-mesh sieve using an agate grinding bowl, and placed in sealed bags at a low temperature of 0 to -20oC and stored for later use. In this example, a 0-10 cm mixed sediment sample of the representative sediment surface of Erhai Lake is selected as an example, and the number is EH-1.

[0074]Based on the chlorophyll a, total phosphorus, total nitrogen, transp...

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Abstract

The invention discloses a method for evaluating the nutritional state of a lake and its application. The evaluation method includes: step a, measuring the total organic phosphorus components in the lake sediment sample, and calculating the ratio of active monoester phosphorus in the sediment sample; step b. According to the nutrient status index of the lake water quality parameters, calculate the lake trophic comprehensive index; step c, according to the active monoester phosphorus ratio and the lake trophic comprehensive index, construct the relationship between the active monoester phosphorus ratio LMP and the lake trophic comprehensive index TLI Model; step d, using the proportion of active monoester phosphorus LMP% to classify and evaluate lake trophic types; the application of the evaluation method is the application of the evaluation method in endogenous release inhibition and / or sediment dredging control projects. The invention establishes the relationship between the active monoester phosphorus ratio LMP% in the sediment and the eutrophication state of the traditional lake, and provides an important way for the relationship between the phosphorus pollution degree in the sediment and the eutrophication degree of the lake body.

Description

Technical field[0001]The invention belongs to the field of environmental science and monitoring technology, and specifically relates to a lake nutritional status evaluation method and its application, and specifically relates to a lake nutritional degree evaluation method based on the ratio of active monoester phosphorus in sediments to carry out lake eutrophication evaluation, The classification of nutritional status and its comprehensive application in the evaluation of phosphorus pollution in sediments and the treatment of eutrophication.Background technique[0002]At the beginning of the last century, the concept and research on eutrophication of water bodies gradually formed. Among them, nitrogen and phosphorus in nutrients are the main limiting factors that cause lake eutrophication and cyanobacteria blooms. In fact, eutrophication is a natural aging process of lakes. However, with the development of industry and agriculture and the acceleration of urbanization and other human a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16C10/00G01N24/08G01N33/18
CPCG01N24/087G01N33/18G16C10/00
Inventor 朱元荣廖海清孙福红高可伟吴丰昌
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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