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

doi:10.11707/j.1001-7488.20110705

林业科学 ›› 2011, Vol. 47 ›› Issue (7): 27-35.doi: 10.11707/j.1001-7488.20110705

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

张飞^1,2, 塔西甫拉提·特依拜^1,2, 丁建丽^1,2,3, 何祺胜⁴, 田源⁵, 买买提·沙吾提^1,2, 王宏^1,2, 桂东伟^6,7

1. 新疆大学资源与环境科学学院乌鲁木齐 830046;2. 新疆大学绿洲生态教育部重点实验室乌鲁木齐 830046;3. 新疆大学研究生院乌鲁木齐 830046;4. 河海大学地球科学与工程学院地理信息科学系南京 210098;5. 新疆农业厅农业资源区划办公室乌鲁木齐 830001;6. 中国科学院新疆生态与地理研究所乌鲁木齐 830011;7. 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

收稿日期:2009-10-14 修回日期:2010-02-08 出版日期:2011-07-25 发布日期:2011-07-25

Dynamically Monitoring Vegetation Cover by Remote Sensing in the Typical Salinization Region of Xinjiang: A Case Study in Delta Oasis of Weigan and Kuqa Rivers

Zhang Fei^1,2, Tashpolat·Tiyip^1,2, Ding Jianli^1,2,3, He Qisheng⁴, Tian Yuan⁵, Mamat·Sawut^1,2, Wang Hong^1,2, Gui Dongwei^6,7

1. College of Resources and Environment Science, Xinjiang University Urumqi 830046;2. Key Laboratory of Oasis Ecology of Ministry of Education, Xinjiang University Urumqi 830046;3. Graduate School of Xinjiang University Urumqi 830046;4. Department of Geographical Information Science, School of Earth Sciences and Engineering, Hohai University Nanjing 210098;5. Agriculture Resources and Regional Planning Office of Xinjiang Agricultural Department Urumqi 830001;6. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences Urumqi 830011;7. Cele National Station of Observation & Research for Desert-Grassland Ecosystem in Xinjiang Cele 848300

Received:2009-10-14 Revised:2010-02-08 Online:2011-07-25 Published:2011-07-25

摘要/Abstract

摘要：

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。

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

Abstract:

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.

Key words: remote sensing, vegetation coverage, the vegetation index of VBSI, dimidiate pixel model, the delta oasis of Weigan and Kuqa Rivers

中图分类号:

S757
TP79

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;. 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[J]. 林业科学, 2011, 47(7): 27-35.

Zhang Fei;Tashpolat·Tiyip;Ding Jianli;;He Qisheng;Tian Yuan;Mamat·Sawut;Wang Hong;Gui Dongwei;. Dynamically Monitoring Vegetation Cover by Remote Sensing in the Typical Salinization Region of Xinjiang: A Case Study in Delta Oasis of Weigan and Kuqa Rivers[J]. Scientia Silvae Sinicae, 2011, 47(7): 27-35.

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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

Dynamically Monitoring Vegetation Cover by Remote Sensing in the Typical Salinization Region of Xinjiang: A Case Study in Delta Oasis of Weigan and Kuqa Rivers

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