东江源红壤丘陵区土地利用与覆盖变化研究

采用RS和GIS技术,以红壤丘陵典型案例区东江源为例,利用遥感影像解译,运用土地利用程度综合指数、单一土地利用类型动态度及状态指数等模型,研究了1986～2005年东江源区土地利用变化特征,揭示红壤丘陵区20年来土地利用变化的时空格局.结果表明,研究区土地利用结构基本稳定,土地利用发展平缓,总体相比而言,1995～2005年土地利用类型变化幅度大于1986～1995年的变化幅度；就土地利用类型的转移模式来讲,研究区的林地转为耕地分布最为广泛；状态指数结果表明未来研究区的土地利用变化呈现耕地、水域和建设用地面积增加,其余地类面积减少的趋势.

Study on Land-use and Land-cover Change over Red Soil Hilly Regions in Dongjiangyuan

The land use change from 1986 to 2005 in the typical red soil hilly region in Dongjiangyuan was analyzed by RS and GIS.By interpreting the TM images and adopting the models of comprehensive land use index,land-use type dynamic change of each land and state index,the temporal and spatial change of land-use in red soil hilly region during the past 20 years were revealed.The results showed that the land-use structure was stable in this region;and the development of land-use was smooth.The extent of land-use type change in 1995～2005 was greater than that in 1986～1995.As for the transformation mode,conversion of forestland into farmland was most prevalent.According to the state index,the area of farm land,water area and contraction land would increase,while the other types of land would decrease in the future.