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摘要： 基于面向对象的影像分类技术与土地利用变化模型,选取处于剧烈变化环境下的东江流域为研究对象,对其1980~2008年的土地利用变化特征进行了研究。结果表明：(1)面向对象的遥感分类方法在SPOT5高分辨率遥感影像分类中具有较高的精度(总体精度达87.7%),可以有效避免“椒盐现象”发生;(2)1980~2008年东江流域的土地利用方式和空间格局发生了显著变化。耕地面积急剧减少了2 854.4 km2,流失的耕地主要转化为了林地、城镇建设用地;园地面积减少了667 km2,流失的园地主要转化为了林地;林地面积增加了1 988.7 km2,呈波动变化;草地面积比由4.9% 缩减为2.0%;水域面积先减少后增加;城镇用地呈快速增长趋势,年增长率高达186.23%。加强耕地保护和适度限制城镇用地增长对区域可持续发展至关重要。 关键词： 面向对象分类技术;  土地利用信息提取;  时空变化;  东江流域     Abstract: Based on the object\|oriented classification technology and land\|use change model,this paper focuses on Dongjiang river basin which is undergoing intense environmental change and analyzes its land use change characteristics from 1980 to 2008.The results shows that:①The object\|oriented classification method of remote sensing in SPOT5 high\|resolution remote\|sensing image classification has high accuracy(overall accuracy reaches 87.7%),and it can reduce effectively the “pepper and salt phenomenon”.②Significant changes in both land use ways and temporal\|spatial pattern have taken place in Dongjiang river basin during the period of 1980~2008.Dramatically the farmland decreased 2 854.4 km2,most of which were converted into forestland and urban construction land.The garden land decreased 667 km2,most of which were converted into forestland.The forestland increased 1 988.7 km2,being in the state of fluctuations.The grassland ratio decreased from 4.9% to 2.0%.Water body first decreased and then increased.The urban construction land showed a trend of dramatic increase with an annual increasing rate of 186.23%.Enhancing farmland protection and placing appropriate restriction on urban construction land is of great very importance to regional sustainable development.

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