鄱阳湖流域NDVI的时空变化及其与气候的关系  

Spatial-temporal Changes of NDVI and Their Relations with Climate Factors in Poyang Lake Valley

作　　者：朱凤凤[1] 程巧贞[1] 

机构地区：[1]江西师范大学地理与环境学院,江西南昌330022

出　　处：《江西农业学报》2012年第3期98-102,共5页Acta Agriculturae Jiangxi

基　　金：江西省水利科学院项目"鄱阳湖水利枢纽工程对流域水环境调控研究(201000458)"

摘　　要：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%.

关 键 词：鄱阳湖流域 NDVI 降水和气温 相关性分析 

分 类 号：S162[农业科学—农业气象学]