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Screening and weight determining method for wetland ecosystem health evaluation index system

An ecosystem and health evaluation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of evaluation uncertainty, difficulty in obtaining index data, and affecting the accuracy of evaluation results, so as to achieve convenient acquisition, The calculation method is simple and is conducive to the effect of application and promotion

Inactive Publication Date: 2017-03-29
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some of these indicators are not easy to obtain, and some are qualitative data, which will bring uncertainty to the evaluation and affect the accuracy of the evaluation results.

Method used

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  • Screening and weight determining method for wetland ecosystem health evaluation index system
  • Screening and weight determining method for wetland ecosystem health evaluation index system
  • Screening and weight determining method for wetland ecosystem health evaluation index system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The 11 routine monitoring indicators of Qixing Wetland in Liaohe Nature Reserve in August 2012 were selected as the research object, and the core indicators for ecosystem health evaluation of Qixing Wetland were selected by factor analysis method: water environment quality (COD, NH 3 -N, TP), aquatic biological characteristics (Chl-a), habitat environmental quality (DO). The calculated weights of each core index are: COD(0.200), NH 3 -N (0.195), TP (0.196), Chl-a (0.185), DO (0.224).

Embodiment 2

[0032] The 11 routine monitoring indicators of the wetland at the entrance of the tributary of the Liaohe River Reserve in August 2012 were selected as the research object, and the core indicators for the ecological health evaluation of the wetland at the entrance of the tributary were screened out by factor analysis: water environment quality (NH 3 -N, TP), aquatic biological characteristics (Chl-a), habitat environmental quality (DO). The calculated weight of each core indicator is: NH 3 -N (0.26), TP (0.26), Chl-a (0.26), DO (0.22).

Embodiment 3

[0034] The 11 routine monitoring indicators of the pit and pond wetland in the Liaohe Reserve in August 2012 were selected as the research object, and the core indicators for the health evaluation of the pit and pond wetland ecosystem were screened out by factor analysis: water environment quality (COD, NH 3 -N, TP), aquatic biological characteristics (Chl-a), habitat environmental quality (DO). The calculated weights of each core index are: COD(0.15), NH 3 -N (0.25), TP (0.20), Chl-a (0.15), DO (0.25).

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Abstract

The invention belongs to the field of environment ecological protection, and particularly relates to a screening and weight determining method for a wetland ecosystem health evaluation index system. The method comprises the following steps of: selecting routine wetland monitoring indexes as candidate indexes of the wetland ecosystem health evaluation, screening core evaluation indexes according with wetland characteristics by using a factor analysis, and calculating the weight of each core index through a characteristic value, a variance contribution rate, an accumulated variance contribution rate and an original load value of a principal component corresponding to each core index. The evaluation index system established by the method is good in pertinence, and high in operability, and the problem that evaluation index data is difficult to acquire can be avoided to some extent; the weight is obtained by calculating an intermediate process value so that the calculation method is simple, and the obtained weight value is high in accuracy; and the method is convenient to popularize and apply.

Description

technical field [0001] The invention belongs to the field of environmental ecological protection, and in particular relates to a method for screening and weight determination of a wetland ecosystem health evaluation index system. Background technique [0002] Wetland is one of the important ecosystems in nature. It plays an important role in curbing the flow of rivers and shrinking wetlands, maintaining the normal ecological functions of rivers and wetlands, protecting the quality of water environment and ecological balance, and realizing the sustainable use of water resources and environment in river basins. effect. Due to the increase of human activities, there has been serious negative disturbance to the wetland ecosystem, so it is particularly important to analyze the changing trend of the health status of the wetland ecosystem. The most important steps in the analysis process are to construct the wetland ecosystem health evaluation index system and to assign weights to...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 段亮李蕊宋永会付少杰张承铭田智勇肖书虎刘晓玲
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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