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首页> 中文期刊> 《林业科学》 >新疆典型盐渍区植被覆盖度遥感动态监测——以渭干河-库车河三角洲绿洲为例

新疆典型盐渍区植被覆盖度遥感动态监测——以渭干河-库车河三角洲绿洲为例

         
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摘要

Vegetation coverage, as an important part of the ecosystem, is closely related to the global climate and long-term economic benefits of the country. Meanwhile, vegetation coverage is an important parameter for the description and assessment of landscape or ecosystem. In the field remote sensing, application of vegetation index to describe vegetation coverage percentage is widely accepted and applied. In this paper, we took the delta oasis of Weigan and Kuqa rivers as research object. This study was based on the TM/ETM + images of 1989, 2001 and 2006, and applied the ENVI, ArcGIS software as technology methods. The vegetation index of VBSI was used to estimate the model of vegetation coverage according to the dimidiate pixel principle, and the estimation precision was later approved to be up to 83. 52%. Further, we produced the vegetation coverage graduation map of the delta oasis of Weigan and Kuqa rivers, and analyzed and appraised changes in its structure. The results revealed a pattern of spatial change in the vegetation coverage of the study area. Forest, grassland and farmland were three main land use types in medium-high and high coverage and played an important role in keeping vegetation cover. Forest area determined the changes of coverage area, while the other two land use types were definitely able to affect direction of the changes. Since forest, grassland and farmland played an important part in keeping regional vegetation coverage, it should be planned to continually plant trees, maintain grassland, protect farmland and control unused land in a long-term program. Finally, variation of vegetation environment quality from 1989 to 2006 was evaluated according to distribution of quantity and space condition rendered by plant cover digital image. By comparing plant cover grade images of the three periods with local statistics materials, this paper pointed out that the development of Wei-Ku oasis soil salinization was controlled by two important reasons nature and humanity. In conclusion, this study provided the reference for the protection of ecological environment in Wei-Ku oasis.%以新疆典型盐渍区——渭干河-库车河三角洲绿洲为研究对象.首先,基于1989,2001,2006年的TM/ETM+遥感数据,以RS为技术手段,借助GIS空间分析方法、植被指数法,根据像元二分原理,采用复合植被指数VBSI估算植被覆盖度,其估算精度达到83.52%；其次,生成渭干河-库车河三角洲绿洲植被覆盖度分级图,并对其格局变化进行分析与评价,揭示出渭干河-库车河三角洲绿洲植被覆盖的时空变化规律.中高覆盖度、高覆盖度以林地、草地和耕地为主,对保持植被覆盖度起重要作用；林地面积的变化对重心转移起关键作用,而草地、耕地的波动则会影响到重心转移方向；林地、草地和耕地对于保持地区植被覆盖率有重要作用,应在长期土地利用规划中坚持植树造林,保持草地、保护耕地和控制未利用地；最后,利用植被覆盖度图像所提供的各覆盖度级的数量和空间分配状况来评价该绿洲植被覆盖度的动态变化,并进一步分析植被覆盖度变化的原因.基于遥感技术进行渭干河-库车河三角洲绿洲植被覆盖度动态变化分析的研究思路和方法能够为该绿洲生态环境保护提供参考依据.

著录项

  • 来源
    《林业科学》 |2011年第7期|27-35|共9页
  • 作者

    张飞; 塔西甫拉提·特依拜; 丁建丽; 何祺胜; 田源; 买买提·沙吾提; 王宏; 桂东伟;

  • 作者单位

    新疆大学资源与环境科学学院 乌鲁木齐830046;

    新疆大学绿洲生态教育部重点实验室 乌鲁木齐830046;

    新疆大学资源与环境科学学院 乌鲁木齐830046;

    新疆大学绿洲生态教育部重点实验室 乌鲁木齐830046;

    新疆大学资源与环境科学学院 乌鲁木齐830046;

    新疆大学绿洲生态教育部重点实验室 乌鲁木齐830046;

    新疆大学研究生院 乌鲁木齐830046;

    河海大学地球科学与工程学院地理信息科学系 南京210098;

    新疆农业厅农业资源区划办公室 乌鲁木齐830001;

    新疆大学资源与环境科学学院 乌鲁木齐830046;

    新疆大学绿洲生态教育部重点实验室 乌鲁木齐830046;

    新疆大学资源与环境科学学院 乌鲁木齐830046;

    新疆大学绿洲生态教育部重点实验室 乌鲁木齐830046;

    中国科学院新疆生态与地理研究所 乌鲁木齐830011;

    新疆策勒荒漠草地生态系统国家野外科学观测研究站 策勒848300;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 森林经理学;遥感技术的应用;
  • 关键词

    遥感; 植被覆盖度; VBSI植被指数; 像元二分模型; 渭干河-库车河三角洲绿洲;

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