Studies On Ecological Security Assessment Index System

The danger of environmental retrogression is kept on guard highly in China. The study of ecological security is becoming the major foreland and task in ecology and resource and environment science. ,and the research of the evaluation indexes system is a key to solve the problems of this field.The paper has discussed the concept of ecological security and has an analysis of the appraisal of ecological security in domestic and abroad firstly. Then it analyzes the feature of natural reserve ecological security. This paper does an analysis of the relations between natural reserve ecological security and the sustainable development, and bases on the ecosystem of natural reserve and their neighboring communities and accordance with the basic requirement of standard ecological security evaluation, source and optional principle of standard value, so uses the 24 evaluation indexes of natural reserve ecological security. Based on the "Pressure-State-Response" frame model, through pressure and quality, protect and renovate of resource-environment to build the ecological security evaluative indexes system of Chagan Lake National Nature Reserve and its adjacent areas. And calculates the result of the proportion of every index with Delphi method, and this article has adopted "safe index method" to standardize the indices' values, synthesized the single index, and evaluated the general security value. Use the evaluation result to evaluate the ecological security.In this paper,an assessment index system composed of 20 index can be used in forward ecological security assessment.The result of the research demonstrates that the Chagan Lake National Nature Reserve insecurity index number is 0.1695, which is placed in a kind of slightly insecurity" condition. But its general condition is good.