地理科学 ›› 2010, Vol. 30 ›› Issue (1): 119-123.doi: 10.13249/j.cnki.sgs.2010.01.119

• 论文 • 上一篇    下一篇

近10年重庆市归一化植被指数变化分析

李惠敏1,3, 刘洪斌1,3, 武伟2,3   

  1. 1. 西南大学资源环境学院, 重庆 400716;
    2. 西南大学计算机与信息技术学院, 重庆 400716;
    3. 重庆市数字农业重点实验室, 重庆 400716
  • 收稿日期:2009-04-24 修回日期:2009-07-12 出版日期:2010-01-20 发布日期:2010-01-20
  • 通讯作者: 武伟,副教授。E-mail: wuwei_star@163.com E-mail:wuwei_star@163.com
  • 作者简介:李惠敏(1984- ),女,甘肃兰州人,硕士研究生,从事遥感与地理信息系统研究。E-mail:grape_4509229@yahoo.com.cn通讯作者:武 伟,副教授。E-mail: wuwei_star@163.com
  • 基金资助:
    国家科技支撑计划项目(2009BADA1B03)资助。

Vegetation Change in the Three Gorges Reservoir Area of Chongqing

LI Hui-min1,3, LIU Hong-bin1,3, WU Wei2,3   

  1. 1. School of Resource and Environment, Southwest University, Chongqing 400716;
    2. School of Computer and Information Science, Southwest University, Chongqing 400716;
    3. Key Laboratory of Digital Agriculture of Chongqing, Chongqing 400716
  • Received:2009-04-24 Revised:2009-07-12 Online:2010-01-20 Published:2010-01-20

摘要: 运用1 km分辨率经过Savitzky-Golay滤波技术平滑处理的SPOT/VGT数据,通过对1998~2007年的归一化植被指数(NDVI)时间序列数据、NDVI与气象因子的关系、10 a来NDVI变化率的空间分布以及NDVI与海拔高度的关系等进行分析,研究重庆市植被变化及空间分布情况。结果表明,重庆市NDVI年变化相对稳定,在空间上变化较大,东北及东南部分地区植被退化,而西部地区NDVI变化率增加,表明植被覆盖有所增多。另外引起NDVI时空变化的原因中,温度远大于降水量,海拔高度也与NDVI有较好的相关性。

Abstract: The article researched the vegetation changes in the Three Gorges Reservoir Area of Chongqing through analysing the time series of NDVI data in 1998-2007, the relationship of the NDVI with meteorological factors, the change rate of NDVI and the relationship between NDVI altitude by using the 1 km SPOT/VGT-NDV I data smoothed by Savitzky-Golay filter. The results show that the annual NDVI variation in the Three Gorges Reservoir Area of Chongqing is relatively stable, while it decreases in the northeastern and southeastern areas and increases in the western area. Furthermore, the spatial and temporal changes of NDVI are mainly caused by temperature and precipitation. The temperature plays a more important role than precipitation in NDVI’s change, the altitude and NDVI also has a better correlation.

中图分类号: 

  • TP79