Health evaluation method suitable for lake benthic ecosystem

A technology for ecosystem and health evaluation, applied in data processing applications, instruments, resources, etc., to achieve the effect of scientific response

Inactive Publication Date: 2020-07-03
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

Therefore, according to the existing technology, the benthic health assessment scheme that only uses indicators such as comprehensive trophic status index to reflect chemical integrity is one-sided.

Method used

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  • Health evaluation method suitable for lake benthic ecosystem
  • Health evaluation method suitable for lake benthic ecosystem
  • Health evaluation method suitable for lake benthic ecosystem

Examples

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Embodiment

[0034] The present invention will be further described below by embodiment and comparative example, a kind of health evaluation method that is applicable to lake benthic ecosystem, method flow chart sees figure 1 , the detailed steps are as follows:

[0035] (1) Determine the sampling point and collect samples. In this example, 9 sites were collected in a lake. The concentration of dissolved oxygen was measured on site, and water samples were taken back to the laboratory for the determination of chemical oxygen demand, total nitrogen, total phosphorus and ammonia nitrogen. Surface sediments were collected and brought back to the laboratory to determine the content of arsenic, cadmium, chromium, copper, nickel, lead and zinc. The benthic animals were brought back to the laboratory for species identification, and the number of individuals was recorded at the same time; the biomass of submerged plants was calculated; the relative abundance and α-diversity indicators of microorg...

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Abstract

The invention belongs to the field of environmental protection, and particularly relates to a lake benthic ecosystem health evaluation method which comprises the following steps: (1) determining sampling points and collecting samples; (2) establishing a comprehensive evaluation index system of a hierarchical structure; (3) calculating each index value, and determining a reference point; (4) screening each biological integrity index, and determining a biological integrity index scoring standard; (5) screening chemical integrity indexes, and determining a chemical integrity index scoring standard; (6) determining the relative weight in each index layer and between the layers by adopting an analytic hierarchy process; and (7) accumulating according to the weight to obtain an integrity score of the benthic ecosystem, and dividing health levels. The method can comprehensively and systematically reflect the real health state of the benthic ecosystem, so that a basis is provided for selectionof a pollution control technology in ecological management.

Description

technical field [0001] The invention relates to the field of ecological environment evaluation and management, in particular to a health evaluation method suitable for lake benthic ecosystems. Background technique [0002] In lake ecosystems, sediments are the source and sink of pollutants. Although exogenous pollution control is adopted in some ecological governance, pollutants in sediments may migrate to water bodies over time, causing endogenous pollution. Pollution, so endogenous pollution is the main problem facing lakes. At present, there are two main ways to reduce endogenous pollution. One is in-situ purification, which reduces endogenous pollution by artificially strengthening the self-purification of its own ecosystem. In severe areas, due to the difficulty of self-purification, dredging is mainly used, but the dredging technology has caused damage to the original ecosystem. Therefore, before carrying out endogenous pollution control, it is necessary to comprehen...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/06393G06Q50/26
Inventor 王颖孟祥钰莫华涛
Owner BEIJING NORMAL UNIVERSITY
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