Studies Of Ecological Safety Evaluation In The Karst Mountain Areas-A Case Of Guiyang City

With population growth and socio-economic development, ecological environment and resource degradation bring about ecological threats that cause our country at a high degree of alertness.Ecological security has become an important component of the national security and it is the foundation and carrier of national defense security,political security and economic safety,ecological security studies has become the forefront areas and important mission,of the current resources and environmental sciences as well as ecological research.The research of regional ecological security evaluation and ecological security pattern analysis based on spatial analysis techniques can make human being understand the current situation of ecological environment and adjust and utilize the ecosystem function to serve the human development rationally.So it meets a kind of human needs of development under the new form.This paper set forth the concepts of ecological security, ecological security evaluation and their research situations at home and abroad firstly.It Analyses the feature of ecological safety and its research theory foundation.Based on the actual state of the karst mountain ecosystem in Guiyang and according to the principle of ecological security evaluation index system to be set up,this paper identified 20 evaluation indexes.It builds the ecological security evaluation indexes system of karst mountain areas in Guiyang through natural ecological security systems,social ecological security system and economic ecological security system Then determines the weight values of every index with AHP,at the same time uses Poor Standardization Law to treat every index non-dimensionally and uses Composite index method to calculate the ecological security composite index That is,the ecological safety and does grid computing,then obtaines ecological security distribution pattern,and evaluates ecological security situation of karst mountain areas in Guiyang through it.This paper evaluate the ecological security of the karst mountain areas in Guiyang to the township for the scale.The results show that the ecological security situation of mountain karst in Guiyang is not optimistic,the ecological security situation is ordinary, poor and even worse in general.Finally,according to actual security situation of karst mountain Guiyang City,the paper puts forward the corresponding protection and management measures,the sustainable development of karst mountain areas will come true.At the last part,the article sums up the results and inadequacies,and puts some suggestions for the further study.