基于SPOT NDVI的植被覆盖时空演变规律分析——以西北五省为例  

Analysis of the regulation of spatial-temporal variation of the vegetation coverage based on SPOT NDVI Data——A Case Study in Northwest China

作　　者：李旭谱[1] 张福平[1] 胡猛[2] 魏永芬[3] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062 [2]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 [3]日本国立岐阜大学流域圈科学研究中心

出　　处：《干旱地区农业研究》2012年第5期180-184,199,共6页Agricultural Research in the Arid Areas

基　　金：中国博士后科学基金(2011M501496);陕西师范大学中央高校基本科研业务费专项资金项目(GK200902021);陕西师范大学优秀科技预研项目(200902005);旅游与环境学院青年科研基金项目

摘　　要：基于SPOT VGT-NDVI影像数据,通过最大值合成法、均值法、线性回归以及最小二乘法等研究方法分析西北五省1999—2007年9 a间的植被覆盖时空演变与动态变化规律。结果表明:9 a间西北地区的植被覆盖有明显改善趋势,改善面积百分比为26.92%;部分地区植被覆盖仍有退化现象,面积百分比为1.22%,但其明显小于植被改善比例;除陕西省外,西北地区植被覆盖整体不高;7、8月份该区域植被覆盖达到一年中最大值。Based on the SPOT VGT- NDVI image data, this paper analyzed the spatial-temporal variation and regu- lation of the dynamic change of vegetation coverage in the 5 northwestern provinces （including Shaanxi, Gansu, Ningxia, Qinghai and Xinjiang） from 1999 to 2007 by use of the maximum synthesis, the mean method, linear regression and least squa.re method. The results showed that the vegetation coverage in Northwest China was improved obviously in the 9 years. The improved ratio is 26.92 %. There were still vegetation coverage degenerations in some parts of the region and the area percentage was 1.22%, which is obviously less than that of the improved area. Except Shaanxi Province, the vegetation coverage in Northwest China is not high overall. The vegetation coverage is the highest in July and August in the year.

关 键 词：植被覆盖 SPOT VGT—NDVI 时空演变规律 西北五省 

分 类 号：X826[环境科学与工程—环境工程]