摘要
结合统计数据与多时相的遥感影像解译数据,研究了上海近50年来耕地动态变化趋势、特征及规律,同时应用主成分分析和多元回归模型分析了耕地变化的驱动因子。研究表明:(1)近50年来,各行政区耕地递减趋势明显且存在显著的区域分异,在地区分布上,耕地流失最快的地区主要分布在经济发达的中心城区周围;(2)耕地数量的减少主要体现为非农建设用地的占用和农业结构内部的调整;(3)主成分分析表明,上海耕地面积变化的驱动因素可以归纳为经济因素,人口因素和工业发展,而经济因素是影响上海耕地变化最为关键的因素。
According to the statistical and land use survey data, discussed were quantitative change characteristics and spatial change trend in the late 50 years in Shanghai. Based on the related social and economical information and principal component analysis, the driving forces of cultivated dynamic change was further analyzed. The results showed that： （ 1 ） the cultivated land decreased greatly in all districts during the past 50 years, and the decrease has significant differences between districts; （2） cultivated land decreased faster in economical de- veloped downtown; （3） the factors of the driving forces of cultivated land change are as following： the economic development, the rapid development of industrial estate and the rapid growth of population, and among which economics is the most important.
出处
《山东建筑大学学报》
2007年第5期403-407,共5页
Journal of Shandong Jianzhu University
基金
国家自然科学基金项目(40131020)
关键词
耕地变化
驱动力
遥感
主成分分析
cultivated land change
driving forces
remote sensing
principal component analysis
