Index selection based drainage area ecological safety evaluation method

Abstract

The invention discloses an index selection based drainage area ecological safety evaluation method. The drainage area ecological safety evaluation method includes: a step 1, acquiring ecological data, water environment data and socioeconomic statistics data of a monitoring drainage area; a step 2, establishing a basic information database on the basis of the acquired data in the step 1; a step 3, performing principal component analysis on each standardized data matrix Xz' to acquire a principal component, acquiring standardized data having a maximum association coefficient with each principal component, wherein an evaluation index corresponding to standardized data is a preferred evaluation index set; a step 4, empowering each evaluation index in each evaluation index class and the preferred evaluation index set thereof; and a step 5, acquiring an ecological safety comprehensive index of the m-th evaluation period of the monitoring drainage area through a product weighting method. The index selection based drainage area ecological safety evaluation method can effectively remove excess indexes, can solve the common colinearity problem in ecological safety evaluation and the problem of evaluation errors due to artificial safe level determination, and can achieve long time tracking and quantitative evaluation of ecological safety.

Description

technical field [0001] The invention relates to the field of index screening, in particular to a watershed ecological security evaluation method based on index screening. Background technique [0002] In the past 30 years, water environmental pollution has caused the ecological function degradation of rivers and lakes in my country and the shortage of water resources, and has threatened the ecological security of our country and affected the stability and development of society. Similarly, it also highlights the serious shortage of my country's watershed ecological security management capabilities. Basin ecological security assessment is the basis of ecological security management, which needs to be strengthened. The key issues in assessing the ecological security status of watersheds and the technical core of scientific diagnosis are data screening and system analysis technology based on massive social, economic and ecological environmental data. To this end, it is necess...

AI Technical Summary

Problems solved by technology

[0004] Although the research on the comprehensive evaluation method of ecological security has been carried out for decades and has accumulated rich experience, there are few studies on the key issue of index screening, and most of them only provide a theoretical screening framework or some screening principles. Lack of theoretical and technical systems that can be practically operated

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