基于TM影像的漳河流域土地利用时空演变分析

Analysis on the temporal and spatial process of dynamic change of land use and land cover in upstream of zhanghe river basin using Landsat TM

为获取和进一步探讨漳河流域土地利用时空演变规律,基于1993、2006及2010年3期Landsat TM遥感影像数据和2011年SPOT5高分影像数据,利用Arc GIS空间分析功能与ENVI动态监测功能对流域土地利用时空演变特征进行研究。分析结果显示:1993-2010年,漳河上游区域下垫面土地利用发生了巨大改变;耕地和裸地呈减少趋势,各减少411.23、341.11 km2;林地、城镇与建设用地和水域用地分别增加了656.8、72.01、23.53 km2;耕地与裸地主要转入林地,部分耕地转入城镇与建设用地。

Land use / land cover change in upstream of Zhanghe river basin was affected by natural and human factors. During the past decades,reduced natural rainfall and frequent human activities has an influence on this region,so this research is important. Through analyzing the spatio-temporal characteristics of dynamic change of land use / land cover change in basin,Land use / land cover change for many years will be extracted in zhanghe river basin,using the method of ENVI change detection and Arc GIS Spatial analyst,based on 1993,2006,2010 images derived from Thematic Mapper（ TM） imagery. Moreover,Spot-5 image derived from 2011,will be used for precision evaluation. These results provide an important statistic reference for land use planning and sustainable development in this region. Finally,results indicate that forest,buildings and water was respectively increased by 656.8km2、72. 01km2、23. 53km2,rather cultivated and barren was decreased by 411. 23 km2、341. 11km2,from 1993 to 2010. The input forest area was mainly originated from farmland and barren. Part of the farmland was transformed into urban land.