基于时序NDVI的江西省植被覆盖时空变化分析

摘要

基于NDVI时序遥感影像,分析了江西省1999年～2008年10年间的地表植被覆盖空间分布及其变化特征.研究表明,江西省10年来植被覆盖总体改善,但呈现出明显的空间分异性:西部和北部增长趋势明显,东部和南部部分地区以及部分城区呈退化趋势.结合土地覆盖分类数据分析发现,NDVI变化特征与土地覆盖类型密切相关,人类活动造成的土地利用类型变化是NDVI变化的重要驱动因素.%The characteristics of spatial distribution and temporal variation of the vegetation in Jiangxi Province from 1999 to 2008 was analyzed based on NDVI time series in this paper. Results show that the vegetation has been generally improved in the last 10 years, but with high spatial heterogeneity. The vegetation in the west and north part has shown an obvious flourishing trend, while that in some east and south districts and urban areas has shown a degradation trend. What's more, it's found that NDVI variation is closely related to land cover type, and land use change caused by human activity is an important driving factor of NDVI variation.