Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (2): 453-458.DOI: 10.11733/j.issn.1007-0435.2016.02.031

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Study on Hyperspectral Reflectance Characteristics of Typical Vegetation in Ebinur Lake Wetland

ARDAK·Kelimu1,2, TASHPOLAT·Tiyip2, NIGARA·Tashpolat1, ZHANG Dong1,2   

  1. 1. College of Resources and Environment Science, Xinjiang University, Urumqi, Xinjiang 830046, China;
    2. Key Laboratory of Oasis Ecology under Ministry of Education, Xinjiang University, Urumqi, Xinjiang 830046, China
  • Received:2015-04-23 Revised:2015-11-18 Online:2016-04-15 Published:2016-06-06

艾比湖自然保护区荒漠-盐生植被VIS-NIR光谱反射特征研究

阿尔达克·克里木1,2, 塔西甫拉提·特依拜2, 尼格拉·塔什甫拉提1, 张东1,2   

  1. 1. 新疆大学资源与环境科学学院, 新疆 乌鲁木齐 830046;
    2. 新疆大学绿洲生态教育部重点实验室, 新疆 乌鲁木齐 830046
  • 通讯作者: 塔西甫拉提·特依拜
  • 作者简介:阿尔达克·克里木(1984-),女,哈萨克族,新疆伊犁人,博士研究生,主要从事干旱区植被遥感应用研究,E-mail:ardak426@126.com
  • 基金资助:

    国家自然科学基金项目(41130531);长江学者和创新团队发展计划(IRT1180);新疆大学博士创新项目(XJUBSCX-2012027)资助

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Abstract:

In this study, several typical vegetation in four different distances from the lake were chosen to measure their hyperspectral reflectance spectra and derivative method were used to analyze the spectra characteristics of typical vegetation (red edge, green peak, blue edge) and changing trend of plants under different locations. NDVI index was extracted through Landsat-8. The results showed that reflect value was the greatest at B area zone which was the nearest to the lake, followed by the salty swamp area. Spectral curve reached the peak around 680~760 nm, and it also distinguished the characteristics bands of vegetation under different distance from the lake. Also, red edge parameters was the highest in B area, and minimum value in C serious salinization bare area. In conclusion, the results provide a scientific basis for Ebinur wetland vegetation hyperspctral remote sensing data processing.

Key words: Ebinur wetland reserve, Spectra characteristics, Vegetation index, Soil salinization, Landsat-8

摘要：

利用便携式地物光谱仪进行艾比湖自然保护区植被光谱反射率的测定,阐明荒漠-盐生植被光谱特征和生存环境的关联,为该地区植被调查提供参考。测定离湖滨不同远近距离4个样区的几种典型植被反射光谱,采用导数法分析植被光谱(如红边,绿峰,蓝边)特征;利用Landsat-8影像提取NDVI指数信息。结果表明:在离湖最近、盐渍化较轻的B样区反射率值最高,其次分别是离湖最远的湿地盐沼区、河流下游段和盐渍地严重的裸露区;植被光谱曲线在680~760 nm附近达到增长最高值,反射率最高达0.9;4个样区植被的"红边位置"有相似的吸收光谱波段特征,B样区的"红边位置"在720 nm处,向长波段方向靠近。总之,高光谱遥感对于荒漠-盐生植被的监测和提取具有重要的意义。

关键词: 艾比湖保护区, 光谱特征, 植被指数, 盐渍地, Landsat-8

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