结合1995/2000年Landsat TM影像数据及1∶10000土地利用现状数据库数据与相关资料,研究了汉江流域中下游(湖北省境内)土地利用变化,研究结果表明:(1)该区的土地利用强度大,1995年与2000年的土地利用强度指数分别为260.025和260.526,说明该区土地利用开发的强度有增大的趋势;(2)从土地利用双向动态变化率来看,该区未利用地(变化率为4.391)正在被加速开发,草地(2.836)与水域(1.664)受干扰严重,这对汉江流域及整个长江流域的生态环境将产生深刻的影响;(3)由于总面积较大,变化面积最大的耕地及林地土地利用双向动态变化率分别为0.424和0.344,说明维系该区人-地系统的基本因素保持相对稳定。本研究还表明,利用RS/GIS结合区域土地利用现状数据库数据研究土地利用变化是一种有效的方法。
The land use changes were investigated in the middle and lower reaches of the Han River Basin (Hubei Province,China) combining the Lansat TM images in 1995/2000 with the land use database (in scale 1 : 10 000) and relative data: The results showed that.. (1) The intensity of land use is high in this region, the intensity coefficients of land use in 1995 and 2000 are 260. 025 and 290. 526, respectively,meaning that the intensity of development and utilization of land trends to increscent; (2) In the views of the rate of land use change in double-directions,unutilized land (with the rate to 4. 391) is developed fast,the grassland (with 2. 836) and water area (with 1. 664) are severely disturbed,and these changes will influence the eco-environment in the Han river Basin and all the Yangtze Basin in deeply; (3) Because their area are big, the rates of land use change in double-directions in farmland and woodland are 0. 424 and 0. 344,respectively,meaning that the fundamentals of regional human-environmental system is relative stable. The results also showed that it is useful to study the land use change by using the RS/GIS with the database of present land use.