基于TM影像的永济市土地利用变化分析

利用永济市1990年和2008年两期TM数据,在遥感图像处理软件ERDAS IMAGINE的支持下,采用RS和GIS相结合的技术方法,通过土地利用动态度模型、土地利用程度时空演变模型的引入,定量分析了18年来永济市土地利用的时空演变。研究表明,该地区城乡居民建设用地增加非常快,耕地面积增加,未利用地大幅减少,林草地减少幅度不大,水域面积呈现萎缩的现象。18年间土地利用动态度变化较小,其综合土地利用动态度为1.73%,耕地和林草地年变化速度最慢,建设用地年变化速度最快,未利用地和水域年变化速度相对居中。土地利用综合指数分别是252.52和263.87,土地利用指数逐渐增大,从土地利用程度指数极限来看,该区域的开发程度已达到中等水平状态。1990~2008年土地利用程度变化量都大于零,反映该区域土地利用处于发展期。

Analysis on Land Use Changes in Yongji City Based on TM Images

In this paper,LUCC situation has been investigated by monitoring an analytical research of two phases of Landsat TM data of 1990 and 2008 in Yongji city,supported by ERDAS IMAGINE software,and used GIS technology and mathematic models.The land use dynamic degree and land use degree has been calculated for the study region on tendency of LUCC.The results indicated that during 1990~2008,the area of the construction land have increased rapidly,the area of cultivated land have increased a little,the area of unused land decreased fast,the grassland and forestland decreased a small quantity of area,and the water area reduced at certain amount.Land use dynamic degree was 1.73 %,which had undergone a small change during the past 18 years,and the changing speed of cultivated land and grassland and forestland area each year was the slowest among the five land use types,while construction land was the quickest.The land use comprehensive index of the cultivated,construction and unused land gradually grew from 252.52 to 263.87.As for the index limit of land use degree,the development degree had achieved the medium level in the study region.The variety of land use degree was higher than zero from 1990 to 2008,which reflected that the land use was in the developing period.