四川农业大学学报 ›› 2012, Vol. 30 ›› Issue (04): 402-409.doi: 10.3969/j.issn.1000-2650.2012.04.006

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基于波段辐射变化向量的四川省翠屏区植被覆盖动态变化分析

高国林1,2, 王石英1,2, 杨存建1,2, 彭文甫1,2, 周介铭1,2, 罗怀良1,2, 赵景峰1,2, 蒋容1,2, 倪静1,2   

  1. 1. 四川师范大学西南土地评价与监测教育部重点实验室, 成都 610068;
    2. 四川师范大学地理与资源科学学院, 成都 610101
  • 收稿日期:2012-09-24 出版日期:2012-12-31 发布日期:2017-02-28
  • 作者简介:高国林,硕士研究生。
  • 基金资助:
    国家"863"计划项目(2009AA12Z140);四川师范大学研究生科研创新基金项目(校研字[2012]6号)

Dynamic Change Analysis of Vegetation Cover Based on Band Radiation Variation Vector, Cuiping District, Sichuan

GAO Guo-lin1,2, WANG Shi-ying1,2, YANG Cun-jian1,2, PENG Wen-fu1,2, ZHOU Jie-ming1,2, LUO Huai-liang1,2, ZHAO Jing-feng1,2, JIANG Rong1,2, NI Jing1,2   

  1. 1. Key Lab of Land Resources Evaluation and Monitoring in Southwest, Ministry of Education, Sichuan Normal University, Chengdu 610068, China;
    2. College of Geography and Resources Science, Sichuan Normal University, Chengdu 610101, China
  • Received:2012-09-24 Online:2012-12-31 Published:2017-02-28
  • Contact: 王石英,博士,副教授,研究方向为遥感与GIS应用,E-mail:Wangsy163@163.com。 E-mail:Wangsy163@163.com

摘要: [目的] 分析四川省翠屏区植被的动态变化状况,为区域植被变化提供监测方法。[方法] 利用1988、2000和2009年3个年份的Landsat TM/ETM+影像数据,采用波段辐射变化向量与影像叠加分析和知识分类对翠屏区1988-2009年的植被动态变化进行分析。[结果] 研究表明:不受地形阴影影响的波段辐射变化向量,可有效分析植被覆盖变化;1988-2009年翠屏区植被覆盖表现为增加趋势,且高密度植被面积有所增加;1988-2009年改善的植被区域与破坏的植被区域同时存在,但改善的植被区域面积较大,整个区域表现为植被有所改善。将波段辐射变化向量值的不同等级赋予不同植被生长区域,从中反映了近22年来翠屏区植被生长趋势较好。此外,将植被动态变化与植被生长图叠加耦合分类得到了1988-2009年翠屏区植被动态生长变化特征图谱。[结论] 翠屏区1988-2009年的植被覆盖发生明显变化,虽然植被覆盖整体表现为高密度植被面积呈增加趋势,但是改善与退化的植被区域同时存在,因此,应继续加强和完善区域生态环境保护措施,以维持植被覆盖的良好趋势。

关键词: 波段辐射变化向量, 植被覆盖动态变化, 四川省翠屏区, 知识分类

Abstract: [Objective] The objective of this study was to provide monitoring methods for vegetation change in Cuiping district through analyzing the dynamic change condition of vegetation cover. [Method] Three years Landsat TM/ETM+ images data of 1988, 2000 and 2009 were used in this study. Three main methods, including band radiation variation vector, image overlay analysis and knowledge classification, were used to analyze the vegetation cover dynamic change in this region from 1988a to 2009 a. [Results] The results indicated that band radiation variation vector unaffected by terrain shadow can analyze vegetation cover change effectively. The vegetation cover showed an increasing trend for 1988-2009 a as well as high-density vegetation area. The improvement and degradation of the vegetation area were existed simultaneously for 1988-2009 a, but improved vegetation area was larger. It resulted in the whole trends of vegetation change was performed for improving for the past 22 years. Band radiation variation vector values were given to the different levels of vegetation growing area. It showed that there was a better trend of vegetation growing in Cuiping district in nearly 22 years. Moreover, this study got the feature map of vegetation dynamic growing change in Cuiping district from 1988 a to 2009 a through overlying and coupling classification the vegetation cover dynamic change and vegetation growing maps. [Conclusion] The Vegetation cover had been changed obviously in Cuiping district for 1988-2009 a. The whole vegetation cover present an increasing trend, specially high-density vegetation cover area, but the improvement and degradation of the vegetation area were existed simultaneously. Thus, in order to maintain the favorable trend of vegetation cover, it should be kept on enhancing and perfecting the protective measures of ecological environment.

Key words: band radiation variation vector, vegetation cover dynamic change, Cuiping district of Sichuan province, knowledge classification

中图分类号: 

  • TP79