基于遥感和空间洛伦茨曲线的北京市昌平区土地利用结构时空变化分析

以遥感影像为数据源,提取2000,2003和2007年三时相的昌平区土地利用信息,以高程150 m为界限划分为山地生态涵养区和平原经济发展区。分析表明,平原经济发展区土地利用结构变化主要体现为耕地向城矿居用地转化,而山地生态涵养区各组分变化并不明显。应用空间洛伦茨曲线和空间基尼系数分析揭示三时相不同土地用途的分布特征,研究发现水域和城矿居用地的空间分布在三时相最不均匀,集中于平原经济发展区,耕地和林地比较均匀,未利用地分布变化较大。7年之间耕地、林地和水域在向均匀方向发展,城矿居用地先趋于不均匀后转向均匀发展,未利用地恰好相反。

Temporal-spatial variation analysis of land use structure based on RS and spatial Lorrenze curves in Changping District, Beijing

In this study,we acquired land use information of the year 2000,2003 and 2007 by remote sensing(RS) images in Changping District,Beijing.Changping was divided into 2 sub-regions by the elevation of 150 meters,named as Mountain Ecological Conservation Zone(MECZ) and Plain Economic Development Zone(PEDZ).The results revealed that the cultivated land converted to building took a dominant role in the changes of land use structure of PEDZ;however,the ratio of all kinds was stable in MECZ.The distribution of different land was studied by spatial Lorrenze curves and spatial Gini coefficient.It was found that the spatial distribution of water field and building land was most uneven in 3 periods,which mainly clustered in PEDZ.Both of cultivated land and woodland were more uniform,and unused land was fiercely varied in study period.The cultivated land,woodland and water field became more uniform in 7 years of study period,but building land was converted to be uneven at first and then become uniform,while unused land absolutely not.