关键词: 土地生态, 安全评价, 指标体系, 层次分析法, 河北省

Abstract: Based on clarifying of land ecological security and taking Hebei Province as the case, this article discusses the methods of security evaluations of land ecology. In accordance with the commonly accepted index of security evaluation on regional land ecology, a system of 22 indexes suitable for this region is established. By adopting the principle of systematic analysis and the security matrix of land ecology, calculation for the two year (2000 and 2004 respectively) status is carried out. The results show that the comprehensive security status of land ecology is labeled “sensitive grade" for 2000 while “alarming grade" for 2004. It indicates that the land security status in Hebei Province in both 2000 and 2004 is in the “unsafe" state with the tendency of deteriorating. The main causes for the deterioration of land ecological security are the population booming, unreasonable reclamation, soil erosion, overgrazing, extensive farming and so on.

Key words: land ecology, security evaluation, index, analytical hierarchy process, Hebei Province