中文摘要：

选取2000和2007年两个时期的TM数据,利用基于NDVI的像元二分模型,估算佛山市的植被覆盖度,并分析其时空变化的情况。结果表明,近8年来,佛山市的植被覆盖度总体上呈下降的趋势,并存在区域间不平衡的现象。较高植被覆盖区的面积减少了384.41 km2,变化率为27.26%,而较低植被覆盖区的面积和中度植被覆盖区的面积分别增加了80.55 km2和229.24 km2,变化率分别为14.17%和18.09%。禅城区、南海区和三水区高植被覆盖区和较高植被覆盖区的面积都有所减少,而较低植被覆盖区和中度植被覆盖区的面积都有所增加。顺德区则相反,高植被覆盖区和较高植被覆盖区的面积都有所增加,较低植被覆盖区和中度植被覆盖区的面积都有所减少。33个镇（街）的植被覆盖度变化存在差异,罗村、狮山、大沥的植被覆盖度下降幅度最大,均在10%以上,而伦教、北和均安的植被覆盖度则有一定的增加。

英文摘要：

The landsat TM data in 2000 and 2007 are selected to estimate and analyze the change of vegetation coverage in Foshan by using the dimidiate pixel model based on NDVI.The results show that the vegetation coverage in Foshan decreased in the past 8 years and the changes in different districts were different from each other.The area of highly vegetation-covered decreased by 384.41 km2 with a change rate of 27.26% while that of mildly and moderately vegetation-covered increased by 80.55 km2 with a change rate of 14.17% and 229.24 km2 with a change rate of 18.09% respectively.Specifically, to some extent,the highly vegetation-covered areas in Chancheng,Nanhai and Sanshui districts decreased while the mildly and moderately covered areas increased.But things in Shunde district are quite different.The vegetation coverage in 33 towns was different from each other.The vegetation coverage in Luocun,Shishan and Dali declined the most with a decrease over 10% while that in Lundun, Beijiao and Jun＇an increased slightly.