摘要植被为生态系统最主要的构成部分，通过对植被的 NDVI 指数进行研究，可 以有效反应植被的覆盖情况。本文以江苏省为研究区，使用月合成的全球 2002-2009 年（每年 7 月）MODIS NDVI 产品，采用像元二分模型的植被覆盖 度估算法、一元线性回归趋势分析法等，从像元和区域尺度上分析了中国江苏地 区 2002-2009 年这 8 年里植被覆盖的变化和空间分布的变化。结果表明:（1） 2002-2009 年来江苏省 NDVI 平均值呈波动下降趋势，NDVI 随年份的变化率为-3.5%/10a，故植被覆盖略有减少。（2）苏南、苏中植被覆盖度呈波动下降趋势； 苏北植被覆盖度为波动上升趋势。（3）总体上看，江苏区域的植被覆盖度是波动 下降的状态，八年来，苏北的平均植被覆盖度大于苏中和苏南。70814

毕业论文关键词：NDVI 像元二分模型 植被覆盖度 江苏区域

Analysis of Eegetation Dynamic Changes in Jiangsu Area During 2002-2009 by Using NDVI Index

Abstract Vegetation is the main component of ecological system. We  can effectively cover the response of vegetation by studying the NDVI index of vegetation. This paper takes Jiangsu province as the research area, using the monthly synthesis of the world's 2002-2009 (July) NDVI MODIS products, analysis the changes of vegetation coverage and the spatial distribution of 2002-2009 in Jiangsu area of China during the 8 years, using Pixel and regional scales. The results showed that: (1) The average NDVI value of 2002-2009 in Jiangsu province showed a downward trend. The rate of change of NDVI with the year is -3.5%/10a, the vegetation coverage decreased slightly. (2) The vegetation coverages of Southern and Central Jiangsu were a declining trend, while the vegetation coverage of Northern Jiangsu was an increasing trend. (3) On the whole: the vegetation cover of Jiangsu region is the state of the fluctuation. In the last eight years, the average vegetation coverage in North Jiangsu is greater than that in Central Jiangsu and South of Jiangsu.

Key Words: NDVI dimidiate pixel model vegetation coverage Jiangsu area

目 录

摘 要 I

Abstract II

目 录 III

图清单 IV

表清单 IV

变量注释表 IV

1 绪论 1

1.1 概述 1

1.2 主要研究内容和技术方法 1

2 研究材料和方法 2

2.1 研究材料 2

2.2 研究方法 3

3 研究结果和分析 5

3.1 江苏地区 2002-2009 年 NDVI 变化特征 5

3.2 江苏地区 2002-2009 平均植被覆盖度空间分布 6

3.3 植被覆盖度变化分析 7

3.4 NDVI 变化趋势的空间分布特征 9

4  结论与讨论 11

参考文献 12

致 谢 14