黑河流域植被覆盖程度变化研究  

Research on Dynamic Changes of the Vegetation Coverage Levels in Heihe River Basin

作　　者：李旭谱[1] 张福平[1] 魏永芬[2] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062 [2]日本国立岐阜大学流域圈科学研究中心

出　　处：《地域研究与开发》2013年第3期108-114,共7页Areal Research and Development

基　　金：中国博士后科学基金项目(2011M501496);陕西师范大学中央高校基本科研业务费专项资金项目(GK201101002);国家科技支撑计划课题(2012BAC08B07)

摘　　要：基于长时间序列SPOT VGT-NDVI影像数据,利用均值法、最大值合成法、最小二乘法、NDVI变化度模型等方法,研究黑河流域1999—2010年植被覆盖程度的动态变化规律。结果表明:研究时段内流域的植被覆盖程度呈逐步改善趋势,改善面积百分比为26.65%,其高度改善区域面积为71.79 km2,几乎全部集中在黑河中游地区;但流域植被覆盖水平整体较差,从东南向西北逐步呈荒漠化态势变化;研究发现部分地区植被仍有退化现象。This paper analyses the regulation of the vegetation coverage dynamic change of Heihe River Basin from 1999 to 2010 by taking the mean method, the maximum synthesis, least squares method and the model of ND- VI change degree, etc. , based on the SPOT VGT-NDVI image data. Results indicate that： the vegetation coverage in Heihe River Basin has improved in these nearly 12 years, the improved ratio is 26.65% , the area of the highly improved region is 71.79 km2, almost all of which concentrated in the middle region ; the vegetation coverage in Heihe River Basin is not high overall, which gradually changes with the trend of desertification from the southeast to the northwest ; and it＇ s found that there are still vegetation coverage degenerations in some parts of the basin.

关 键 词：植被覆盖 SPOT VGT-NDVI NDVI变化度模型 黑河流域 

分 类 号：X826[环境科学与工程—环境工程]