Ecological Security Evaluation And Early-warning Theory In Anding Area Dingxi City

Ecological environment problem has become an increasing important issue in recent years, ecological security, has become equally important with military security.economic security,political security and national defense security.Therefore,it is meaningful to study ecological security.By adopting General Mode Method and AHP method, combining the issue of ecological security in Anding area, this dissertation has evaluated the status quo of ecological security in Anding area Dingxi City and discuss the methods of resolving the problem,in a ccordance with ecological security theory and early-warning theory.The contents includes the following items:1 Analyzing the status quo of ecological security, summarize the basic theory of ecological secuirty and the evaluation of early-warning.2 Analyze the status quo of ecological security in Anding area Dingxi City and point out the impact of ecological security of the key factor in the area.3 Illustrate the technical rout of the research.The method of this dissertaiton is pinned down by analyzing various mathematical methods.And carry out the research of the status quo of ecological security in Anding area Dingxi City.4 Corersponding countermeasures have been put forward for the existing problems of it in accordance with the result of evaluation and early-warning.This dissertation has used the concept of ecological security level and the following conclusions have been drawn by analyzing the status quo of ecological security in Anding area in 1993,1999,2005:1 From1993 to 2005, there was virtuous development in ecological security in Anding area Dingxi City and the volume of ecological security increased year by year.2 The interior mechanism and the exterior factors influencing thestatus quo mainly in term of resources and the environment, including grass cover and agricultural land productivity. 3 To resolve ecological secuirty in Anding area Dingxi City, the author put forward the specific measures of build terraces and the overall countermeasuers of setting up the maintenance system of ecological security.