基于因子—聚类分析的土地生态安全评价

Ecological Security of Land Evaluation Based on Factor-Cluster Analysis

基于全国各省的土地状况建立土地生态安全评价指标体系,从空间视角选取全国2017年31个省份的数据,借助SPSS20. 0软件进行因子、K-均值聚类分析。结果表明:因子分析将影响土地生态安全的12个评价指标综合成了五大因子指标,命名为“资源利用”“经济响应”“环境压力”“社会压力”“环境发展”五大因子;运用K-均值聚类分析,将31个省份的土地生态安全水平划分六类,高风险区、中风险区、低风险区、一般安全、安全、非常安全。此分析对进一步改善和提高土地生态安全状况具有一定的指导意义。

The evaluation index system of land ecological security was established based on the land condition of all provinces in China. Data of 31 provinces in China in 2017 were selected from a spatial perspective. Factor and k-means clustering analysis were performed with SPSS20.0 software. The analysis results show that factor analysis integrated the 12 evaluation indexes affecting land ecological security into five factor indexes, which were named as "resource utilization","economic response","environmental pressure","social pressure" and "environmental development". With K-means clustering analysis, the land ecological security level of 31 provinces was divided into six categories: high risk area, medium risk area, low risk area, general safety, safety and very safety. This analysis has certain guiding significance for further improving and improving the ecological security of land.