水土保持通报2011，Vol.31Issue(5)：208-214,7.
宁夏回族自治区NDVI的时空变化特征研究
Spatiotemporal Variations of NDVI in Ningxia Hui Autonomous Region
摘要
Abstract
Based on SPOT-VGT NDVI and meteorological data from 1999 to 2009,the paper synthesized monthly and yearly maximum NDVI,and standardized anomaly NDVI.Using some spatiotemporal analysis methods,such as regression analysis,correlation analysis and variation coefficient,the paper studied the dynamic characteristics of vegetation in Ningxia Hui Autonomous Region over recent 11 years.The spatial distribution analysis results show that the NDVI values were higher in the north and the south part,but lower in middle.This characteristic agreed with the geographical division and vegetation distribution pattern of Ningxia.The NDVI values changed greatly over time and responded closely to yearly precipitation,especially in the drought zone located in the middle of the region.The NDVI in most places within the region increased during the period and in only five areas decreases of NDVI were found,which indicated the whole vegetation cover the region became better over the period.The spatiotemporal variations of NDVI show that the ecosystem has been gradually improved in recent years as the NDVI variations responded clearly to the ecosystem changes.There had some ecological restorations projects applied recently,which might be the major factor that resulted in the increase of NDVI in the region.关键词
NDVI/回归分析/变异特征/宁夏回族自治区Key words
NDVI/regression analysis/variation characteristic/Ningxia Hui Autonomous Region分类
生物科学引用本文复制引用
杜灵通,田庆久..宁夏回族自治区NDVI的时空变化特征研究[J].水土保持通报,2011,31(5):208-214,7.基金项目
宁夏自然科学基金项目“宁夏退耕还林生态效应的遥感定量评估技术研究” （）
国家重点基础研究发展计划项目“气候变化对我国粮食生产系统的影响机理及适应机制研究” （）
