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基于主成分分析的哈尔滨市土地生态安全评价
引用本文:孙奇奇,宋戈,齐美玲.基于主成分分析的哈尔滨市土地生态安全评价[J].水土保持研究,2012,19(1):234-238.
作者姓名:孙奇奇  宋戈  齐美玲
作者单位:1. 东北农业大学资源与环境学院,哈尔滨,150030
2. 国家土地督察沈阳局,沈阳,110136
基金项目:黑龙江省青年学术骨干项目(1154G45);国家自然科学基金(41071346);国家科技支撑计划项目(2008BAD96B02)
摘    要:土地生态安全关系到一个区域整体生态环境的可持续发展。按照哈尔滨市土地资源现状,从自然、经济、社会三个方面选取与土地生态安全关系密切的21个指标,构建评价指标体系。运用主成分分析方法,对2001—2008年哈尔滨市土地生态安全状况进行分析,最后设定安全阈值,并进行初步探讨。结果表明:2001—2008年哈尔滨市土地生态安全状况呈波动变化的递减发展趋势,但总体处于较安全水平。具体来说哈尔滨市土地生态安全变化水平可分为几个变化阶段,2002年前处于较安全水平;2003年处于生态安全拐点,随后至2007年安全水平不断下降,期间虽2005年有小幅上升,但变化总趋势递减,直至2008年稍有好转处于较安全水平。土地生态安全处于连续波动状态,近些年有不安全趋势。

关 键 词:土地生态安全  主成分分析  评价  哈尔滨市

Analysis of Land Ecological Safety Evaluation of Harbin City Based on Principal Component Analysis
SUN Qi-qi,SONG Ge,QI Mei-ling.Analysis of Land Ecological Safety Evaluation of Harbin City Based on Principal Component Analysis[J].Research of Soil and Water Conservation,2012,19(1):234-238.
Authors:SUN Qi-qi  SONG Ge  QI Mei-ling
Institution:1.College of Resources and Environment,Northeast Agricultural University, Harbin 150030,China;2.Shenyang Bureau of State Land Supervision,Shenyang 110136,China)
Abstract:Land ecological security is relation to the overall regional ecological environment sustainable development.Evaluation index system has been constructed according to Harbin City land resources situation,from three aspects including nature,economy,and society by selecting 21 indices which have close relation with land ecological security.Land ecological security situation of Harbin City from 2001 to 2008 was analyzed by using the principal component analysis method,safety threshold was set and preliminary discussed finally.The results of the study show that land ecological security situation of Harbin City is at the trend of degressive fluctuations from 2001 to 2008,but overall is at a safety level.Specific land ecological security changes of Harbin City can be divided into several levels: at a security level before 2002;the land ecological security was in the inflection point in 2003,and then safety levels have been going down to 2007,during this period,although the level performed a little rise in 2005,the general trend is degressive;the security level was somewhat better until 2008.Land ecological levels had been in a wave state and had insecure trend in recent years.
Keywords:land ecological security  principal component analysis  evaluation  Harbin City
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