Evaluation And Analysis Of Forest Ecological Security At County Level In Guizhou Province

Forest ecosystem is the main body of terrestrial ecosystem and plays an important role in regulating global climate change.Due to human activities,the forest is constantly being destroyed,and the global scale of ecological environment is becoming more and more serious,and the restoration and protection of forest ecosystem is urgent.Therefore,it is very important to evaluate the safety of forest ecosystem.This paper Based on the PSR model,15 indexes were selected to establish the evaluation index system.Using entropy weight method to calculate the weight and the forest ecological security index value.A total of 7 indexes for calculating the ecological location coefficient were determined by reference.The ecological location value of each county was calculated by geographic information system.The calculation results are modified with the ecological location coefficient.The ecological location and forest ecological index are divided into five levels,and the results are presented visually by GIS.The main conclusions are as follows:The better ecological location in guizhou province is qiandongnan prefecture,and the bijie area of the region with the worst conditions.The general trend of change is:from the northwest of guizhou province to the southeast region,the ecological location is getting better and better.The forest ecological security situation of county area of guizhou province is better overall.According to the city divided,The forest ecological security index is the best in qianxinan prefecture and qiandongnan prefecture,Liupanshui city and bijie city ranked lowest;By county,Wangmo county forest ecological security index is the highest,the index is 0.7916.Hezhang county has the lowest index,0.3402.The forest ecological security situation in most counties is located in the three levels of general safety,less safe and safer.Although the forest ecological security situation of the counties in guizhou province is better overall,but there is still a gap.And the karst landform in guizhou province is developed,It is difficult to restore that forest once it is damaged.Therefore,in the future development,the counties of guizhou need to strengthen the protection and restoration of forests in order to achieve a better state.