基于TM与OLI影像的石家庄市土地利用变化分析

A study on land-use change of Shijiazhuang city based on landsat TM/OLI

为了了解近年来石家庄土地利用变化趋势,基于Landsat TM/OLI影像数据,运用ENVI空间分析与土地利用动态度模型对石家庄1987-2015年的土地利用时空变化特征进行了分析。结果表明,高密度建筑用地面积从1987年的24.51km^2扩张到2015年的168.44km^2,低密度建筑用地面积从92.22km^2减少到86.93km^2,绿地面积从250.78km^2下降到111.29km^2;各土地类型变化差异显著,石家庄单一土地利用动态度在-4%~14%之间,各时间段综合土地利用动态度分别为0.16%、0.32%和0.38%;人口增加、经济增长和人民生活水平提高是导致石家庄土地利用变化的主要原因。

For understanding land-use changes in Shi]iazhuang, the temporal-spatial changes of land use in Shijiazhuang was analyzed based on landsat TM/OLI image, using Envi space and land-use dynamic change model as the method. The result shows that the land of high building density area expanded from 24.51 km2 to 168.44 km2 from 1987 to 2015, the land of low building density area reduced from 92.22 km2 to 86.93 km2 , and the greenland area re- duced from 250. 78 km2 to 111. 29 km2 at the same time. All kinds of land-use dynamic change were significant. The single land-use dynamic change of Shijiazhuang was kept be- tween- 4% and 14%, and the multiple land-use dynamic changes during each time period were 0.16% ,0.32% and 0.38% respectively. The population increase, economic growth and the improvement of living conditions play important roles in the land-use change of Shiji- azhuang.