Land Use Change And Eco-security Assessment Of Zepu Country

Land use change is an outstanding performance of human social activities,and the structure and function of land ecological security is closely related to land use change.With the continuous expansion of the scope of human activities and the intensity increasing,the impact on the ecological environment is increased,further research into the relationship between land use and ecological safety,the reasonable,scientific and efficient use of land resources has important practical significance.Taking the typical oasis County Zepu County as the research object,related theories and concepts based on the analysis of the change of land by means of the KQGIS software platform for Zepu county during 2005-2014,analyzed and evaluated the ecological security and the types of land use changes caused by.According to the analysis results,combined with the local actual situation puts forward corresponding suggestions and Countermeasures to the future,Zepu County Ecological Security and land use optimization to provide theoretical support.This paper mainly includes the following research contents:(1)According to 2005-2014 years Zepu County annual land use change data on the three aspects of the number of land use change,land use change and the change of land use structure in detail and analysis and research.(2)To investigate the mechanism of the effects of land use change on the ecological security,and based on the framework of P-S-R model,from three aspects of land ecological pressure,state and response to construct the evaluation index system of land ecological security will be combined to determine the weight of evaluation index AHP and entropy method,and then get the comprehensive index of ecological safety in Zepu value is calculated according to the comprehensive evaluation method,finally according to the situation of land ecological security in Zepu City,combined with the actual situation of the county put forward relevant suggestions in the optimization of land resource and land ecological safety protection.Through the above research,the following results are obtained:(1)The characteristics of land use in Zepu county.Zepu County 2005-2014 year period,from the quantity change,in addition to garden,woodland,waters and the natural reserve appeared to reduce outside,other types of surface are gradually become larger,the cultivated area continued to grow,the Zepu County ecological security stability has played a certain role;the change extent of land use degree in 280.32-289.34,the degree of land use in the middle level;from the change of structure,land use degree of order in Zepu county increased first and then tends to be steady state trend,finally stabilized at around 1.491,the degree of order increased visible.(2)The ecological security index Zepu County Land during the study period,the land ecological security value of the overall trend showed a rising trend,the comprehensive index of land ecological security in 2005 for 0.3530,2014 years the comprehensive index of land ecological security is 0.6387,during the growth of 0.2857,although the ecological security index of the land is increasing,but it is still not safe state,Zepu county to the ecological environment protection given greater attention.The results for the realization of "The county development goals of “eco Zepu ”has realistic significance," but also for other arid area sustainable utilization of land resources and provide scientific reference for ecological security protection.