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中文摘要：
对东江流域1998年，2006年的TM遥感影像数据进行处理，利用Arc Gis对东江主干沿岸边缘做10km的缓冲区，通过监督分类划分出6类地物类型。在此基础上，结合流域集水区的范围分出河岸缓冲带的上中下游区域。以Fragstats为工具，分别计算类型和景观水平上的景观指数，进而分析河岸带各区域景观格局的动态变化。重点分析了河岸带各区段景观指数变化对水体恢复的影响。结果表明：经过8年的变迁，东江河岸带水体的恢复在各区段有不同的表现。上游地区水体斑块面积有所下降，破碎化程度降低，聚集分布，中下游地区水体面积增加，同时破碎化加强，水体斑块分散分布。河岸带不同区域中植被斑块面积有不同程度的增加，表明植被覆盖率增大。区域中耕地斑块面积在整个河岸带中的比例降低，对水体水质的污染会有减缓作用，尤以上游变化为明显。建成地斑块面积增加，分布更加聚集，反映出河岸带地区城市化水平加剧，尤其在中游地区表现明显。其中，植被的增加和耕地的减少对水体恢复起到了促进的正效应，而建成地的增加不利于水体的恢复，起到负效应。由于各种景观要素作用的不同，不同区段水体表现出不同的恢复效果。上游基本保持现状，作为源头保护良好，中游水体有显著增加，下游区段，虽然水体有一定的恢复成效，但是由于人口密度较大，抵消了恢复的力度，所以没有中游地区的效果明显。各种因子的综合表明，在水体恢复的过程中，要结合各区域的实际情况，在流域尺度上进行恢复，注重多因子的协调。
英文摘要：
Based on Thematic Mapper remote sensing data of 1998 and 2006, a buffer zone along the stream of the Dongjiang River with width of 10 km is created by ArcGis. We identified 6 land use and land cover types using supervised classification techniques. In addition, upper, middle and down reaches were got with the catchments. A selected group of landscape metrics at the class and landscape level was used to quantify the changing pattern of land use and land cover in the study region using Fragstats. It is indicated that the conditions of water restoration are different in the different segments of the riparian buffer. The area of water patch decreased in the upper reaches, at the same time, the fragmentation also decreased. While in the middle and down reaches, both the area of water and the fragmentation increased The area of vegetation patch increased in different degree. The proportion of farmland decreased in the whole riparian buffer, especially in the upper reaches, which may reduce the pollution of water. The increasing urbanization indicated by the increase of area and the aggregation distribution of built-up area,exhibit distinctly in the middle reaches. The increase of woodland and reduction of farmland will play a positive role in the restoration of water, while the urbanization may has a negative effect. It is concluded the condition of each reach should be considered respectively during the restoration of water, and it is processed in the landscape level.
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