Abstract:

Land resources is the depending capital of human existence,therefore,more and more problems of ecological safety in land resources are concerned.In view of this,study on ecological security of land resources has become a forefront topic of regional sustainable development,and the assessment of regional land resource ecosecurity is the core and base of the st〖JP2〗udy on sustainable land use.The paper chose Changsha〖JP〗ZhuzhouXiangtan urban agglomerations as the research object and discussed the method of the assessment of land ecological security.Based on the characteristics of land ecosystem in ChangshaZhuzhouXiangtan urban agglomerations,the paper established the index system of land ecological security from perspectives of economy,society and environment.Considering the illegibility,uncertainty and dynamic characteristics of the security assessment of land ecology,the paper synthetically made 〖JP2〗use of the entropy theory and the fuzzy mathematical method based on status assessment model and trend analysis model to judge the ecological security degree of land.The results indicated that the ecological security of land resource in ChangshaZhuzhouXiangtan urban agglomerations from 1999 to 2007 years was becoming worse and was in the extremely insecurity degree at present.At the same time,there are some factors that threaten ecological safety,including coordinated degree of soil and water erosion,rate in disaster area,population growth rate,and proportion of tertiary industry in total GDP,energy consumption of GDP of 104 Yuan RMB and so on.So some implementations of water and soil conservation projects,increasing watersaving irrigation equipments,effectively controlling population growth and so on are the key ways to improve land resource ecological security status in ChangshaZhuzhouXiangtan urban agglomerations.The assessment results could objectively reflect the actual situation in the region.This research develops a vehicle to promote land resource ecological security study,provides a way to establish a practical assessment method, and facilitates to achieve regional land use sustainability.