利用1998 ～2010年的SPOT VEGETATION旬数据,用均值法分析这13年间鄱阳湖流域年NDVI和NDVI的季节变化趋势,用一元线性回归法分析这13年NDVI变化的空间分布特征.结果表明:13年鄱阳湖流域的年NDVI呈增加趋势,在山地和丘陵地区有明显的改善,盆地和平原地区存在中度或轻微改善,而在较大的城市呈从中心向外沿依次明显退化、中度退化、轻微退化和基本不变的环状分布.年NDVI与年降水量和年平均气温的变化没有显著的相关性,月NDVI与月降水量和月平均气温存在显著的相关性,可信度在95％以上.%According to the data of 10 - day SPOT VEGETATION during 1998 ~ 2010, the variation trends of annual and seasonal NDVI in the Poyang Lake valley during this 13 years were analyzed by using the averaging method, and the spatial distribution characteristics of the NDVI change were studied by using the unitary linear regression method. The results indicated that: from the year 1998 to 2010, the annual average NDVI presented an increasing trend in the Poyang Lake valley, and it was significantly increased in the mountainous and hilly areas, moderately or slightly improved in the basin and plain area; while in larger cities the annual average NDVI reduced less and less (significantly, moderately, slightly, or little) from the central urban zone to suburban zone. The correlations between annual NDVI and annual precipitation, annual average air temperature were not significant, while those between monthly NDVI and monthly precipitation, monthly average air temperature were significant, its reliability was up to 95%.
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