陕北黄土高原植被覆盖时空动态研究  

Spatial and temporal dynamic of vegetation cover in the Loess Plateau of Northern Shaanxi

作　　者：韩可欣 袁航[1] 

机构地区：[1]贵州师范大学地理与环境科学学院,贵州贵阳550025

出　　处：《贵阳学院学报（自然科学版）》2016年第4期24-30,79,共8页Journal of Guiyang University：Natural Sciences

摘　　要：在RS和GIS技术支持下,利用2001-2010年MODIS-NDVI影像数据及DEM数据,以最大值合成法、均值法、标准差法及回归分析等地图代数统计方法为基础,对陕北黄土高原不同坡度区植被覆盖的时空动态进行分析。研究结果表明:(1)2001-2010年间,陕北黄土高原地区年度NDVI值总体呈增加趋势;各季节的NDVI均有不同程度的提升,提升幅度:夏季>秋季>春季>冬季;(2)坡度0-3°地区的NDVI基本保持稳定,3-8°、8-15°、15-25°和>25°四个坡度区的植被覆盖增加,其中坡度15-25°地区的NDVI值增加明显;(3)退耕还林还草工程是陕北黄土高原地区植被覆盖改善的主要原因。With the support of RS and GIS technology, using MODIS - NDVI image data and DEM, basing on the maxi- mum synthesis, regression analysis and other methods, the author analyzed vegetation coverage changes of different slope area on the Loess Plateau region of Northern Shaanxi. Analysis results showed that：（ 1 ）Between 2001 and 2010 ,the Lo- ess Plateau region of Northern Shaanxi in the NDVI increased generally ; Each season＇ s NDVI all increased in different degrees, the obvious upgrade happened in the summer and autumn, and summer 〉 autumn 〉 spring 〉 winter; （2） NDVI was basic stable in 0 -3° region, NDVI increased in 3 -8°, 8 -15°, 15 -25° and 〉 25°region, NDVI value increased obviously in 15 to 25° slope region of; （3） Returning farmland to forest and grassland project was main causes of vegeta- tion improve in Loess Plateau region of Northern shaanxi.

关 键 词：陕北黄土高原 季节性 NDVI 坡度差异性 DEM 

分 类 号：Q948[生物学—植物学]