西南山地城市耕地时空变化及其驱动力研究——以重庆市沙坪坝区为例

发布时间：2018-02-22 21:15

本文关键词： 耕地耕地时空变化驱动力重庆市沙坪坝区　出处：《广西师范学院学报(自然科学版)》2016年04期 　论文类型：期刊论文

【摘要】：本研究结合2005年、2009年、2015年遥感影像图与变更调查成果,利用主成分与多元回归分析相结合的方法,分析耕地的时空变化特征及其主要驱动力,结果表明:沙坪坝区耕地时空变化特征显著,耕地面积与人均耕地面积呈现快速减少后趋于平稳的总体趋势;耕地变化呈现出明显的空间差异性特征,从变化强度来看,西南部区域为高度变化区,北部区域为中度变化区,中部及东部区域为低度变化区;从耕地相对变化量来看,虎溪街道耕地变化速率最快,最慢的为覃家岗街道;2005—2015年,沙坪坝区耕地重心向东北方向偏移明显,偏移距离达1 302.48m;主成分分析表明,影响沙坪坝区耕地时空变化的驱动因子可归纳为社会经济发展水平和农业结构调整,其中社会经济发展水平是最主要因子;多元回归分析表明社会经济是影响沙坪坝区耕地时空变化的最主要驱动力。研究结果能为耕地资源的合理开发与规划利用提供理论指导与实践借鉴。
[Abstract]:Combined with the results of remote sensing image map and change survey on 2005, 2009 and 2015, the paper analyzed the characteristics of temporal and spatial change of cultivated land and its main driving force by combining principal component and multivariate regression analysis. The results show that the temporal and spatial changes of cultivated land in Shapingba area are remarkable, the cultivated land area and per capita cultivated land area tend to be stable after the rapid reduction, and the cultivated land changes show obvious spatial difference characteristics, and the change intensity is analyzed. The southwest region is a high change area, the northern region is a moderate change area, and the central and eastern region is a low change area. From the relative change of cultivated land, the rate of cultivated land change in Huxi street is the fastest, the slowest of which is the Qinjiagang street from 2005 to 2015. The center of gravity of cultivated land in Shapingba area was obviously shifted to the northeast, and the distance of migration reached 130.48 m.The principal component analysis showed that the driving factors affecting the temporal and spatial change of cultivated land in Shapingba area could be summed up as the level of social and economic development and the adjustment of agricultural structure. The level of social and economic development is the most important factor; Multiple regression analysis shows that social economy is the main driving force to influence the temporal and spatial changes of cultivated land in Shapingba area, and the results can provide theoretical guidance and practical reference for rational development and planning of cultivated land resources.
【作者单位】：西南大学;
【基金】：教育部人文社会科学研究一般项目(15YJAZH068) 西南大学人文社会科学研究重大项目培育(14XDSK2004)
【分类号】：F323.211

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