论文部分内容阅读
该文根据1996~2006年土地利用变更调查数据和社会经济统计数据,针对雅安市的耕地面积变化趋势进行了分析,并用主成分分析和聚类分析方法,对引起耕地面积变化的驱动力因素进行了研究。研究结果表明,近11年来雅安市耕地面积总体呈线性下降,经历了缓慢减少→增加→急剧减少→缓慢减少的变化过程,且人均耕地面积也呈线性下降趋势。以第一、二主成分为自变量、耕地面积为因变量建立的回归方程表明,耕地面积变化与社会经济发展的综合实力和规模以及活跃度密切相关;指标型聚类分析的结果表明,影响雅安市耕地面积变化的驱动力因子为粮食产量因子、交通因子、油料产量因子和人口与经济因子。
Based on the survey data of land use change and socio-economic statistics from 1996 to 2006, this paper analyzed the trend of cultivated land area change in Ya’an and analyzed the driving forces that caused the change of cultivated land area using principal component analysis and cluster analysis Study. The results show that in the past 11 years, the cultivated land area of Ya’an City has dropped linearly in general, undergoing the process of slow decrease → increase → sharp decrease → slow decrease, and the per capita cultivated land area also showed a linear decrease trend. The regression equation established by using the first and second principal components as independent variables and the cultivated area as dependent variable shows that the change of cultivated land area is closely related to the comprehensive strength and scale of social and economic development as well as the activity. The results of index-based cluster analysis show that the impact The driving forces for the change of cultivated land area in Ya’an are grain yield factor, traffic factor, oil yield factor and population and economic factor.