中山市近18年土地利用/覆被变化特征研究

Analysis on Variation Characteristics of Land Use/Cover in Zhongshan City from 1988 to 2006

利用1988和2006年TM遥感影像在ENVI4.5中进行了解译分类、空间分析,在ArcGIS 9.1中输出了中山市两期土地利用/覆被分类图。结果表明,从土地利用类型的结构和数量来看,近18年来,中山市各种土地利用类型趋于均匀化,农业生产结构趋于多样化;在空间上,建设用地的增加主要集中在3个地区,靠近与佛山和江门接壤的西北部地区、中山城区周边地区、靠近珠海市区的南部地区;基塘用地的几何中心也从原来的西北部逐渐朝东南移动;从土地利用变化的幅度和速度来看,中山市建设用地的增加速度最快,耕地的减少速度最快,林地和草地的变化率最小。

Interpretation, classification and spatiat analysis were made in ENVI 4.5 by adopting TM remote sensing images during 1998 and 2006, and two-stage land use/cover classification figure in Zhongshan City was obtained by ArcGIS 9. . The results showed that from the perspective of strueture and area of lamt use type, various land use type had tended to be equal and agricultural productive structure had tended to be diversified in recent 18 years. Construction land mainly increased spatially in 3 areas, including the northwest areas close to Foshan and Jiangmen, surrounding areas of Zhungshan City and southern areas near Zhuhai City. Geometric centre of dike-pond land had moved to south- east from northwest. From the perspective of variation extent and speed of land use, the growth of cunstruction land was the fastest, decrease of cultivated land was the fastest and variation rate of woodland and grassland was the least.