水土保持通报2016，Vol.36Issue(3)：159-164,6.
黑河上游植被覆盖时空变化特征及其未来趋势
Spatial-temporal Changes and Future Trends of Vegetation Cover in Upper Reaches of Heihe River
摘要
Abstract
[Objective] To study the spatial‐temporal changes of vegetation cover in the past 14 years and its future trend in the upper reaches of the Heihe river in order to provide a support for the regional ecological protection .[Methods] Based on the MODSI‐NDVI data from 2001 to 2014 ,we did the quantitative analysis by linear trend analysis and Hurst index .[Results] The vegetation cover in the study area had been impro‐ving slowly ,showing a “volatility‐improvement” trend on year scale ,the mean NDVI decreased gradually from southeast to northwest and shows a meridional zonality . The area with increased vegetation cover accounted for 47 .74% ,whereas the area with deceased vegetation cover accounted for 21 .81% .The im‐proved areas are mainly distributed in the central and northwestern parts of study area with alpine steppe signifi‐cantly improved .The degraded areas are mainly located in the southeast of study area with alpine meadow significantly degenerated .The vegetation cover in the upper reaches of the Heihe river will increase in the fu‐ture .[Conclusion] The vegetation cover in the upper reaches of the Heihe river is high and the future trends of the vegetation cover is toward improving ,but we need to take measures to protect areas still degenerating in Qilian ,Minle and Shandan County .关键词
黑河上游/NDVI/时空变化Key words
upper reaches of the Heihe river/NDVI/spatial-temporal changes分类
农业科技引用本文复制引用
雷声剑,张福平,燕玉超,刘筱..黑河上游植被覆盖时空变化特征及其未来趋势[J].水土保持通报,2016,36(3):159-164,6.基金项目
国家科技支撑项目“敦煌生态修复关键技术研究与示范”（2012BAC08B07）；陕西师范大学中央高校基本科研业务费专项资金项目 （）
