Classification of grassland types in ibet by MODIS time-series images

Q. Wen, Shuo Liu, Zengxiang Zhang, Wei Qiao
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引用次数: 1

Abstract

As one of the five biggest pasturing areas of China, natural grassland in Tibet Autonomous Region, accounts for about 21% of the total area of Chinese natural grassland. Classification of rangeland types is a basic and significant study in stockbreeding. Utilizing the advantages of high temporal resolution of MODIS to construct time series EVI during the grass growth period, dividing large study area to individual regions via altitude and latitude, the paper classifies grassland in Tibet Autonomous Region to 6 types, meadow steppe, typical steppe, desert steppe, high-cold meadow steppe, high-cold typical steppe and shrub herbosa, successfully. This work is one part of the project-land cover mapping of China based on remote sensing images We provide land managers with map of the grassland types and area value of each grassland type in Tibet Autonomous Region in 2005. Average EVI of each grassland types during growth period is induced to reflect relative grass biomass among each type. Shrub herbosa has the biggest average EVI, followed with meadow steppe, high-cold meadow steppe, typical steppe, high-cold typical steppe. Desert steppe has the lowest average EVI.
基于MODIS时序影像的青藏高原草地类型分类
西藏自治区天然草地面积约占中国天然草地总面积的21%,是中国五大牧区之一。草地类型分类是畜牧业研究的基础和重要内容。利用MODIS高时间分辨率的优势,构建牧草生长期时间序列EVI,根据海拔和纬度将研究区域划分为单个区域,将西藏自治区草地划分为草甸草原、典型草原、荒漠草原、高寒草甸草原、高寒典型草原和灌丛草本6种类型。本工作是“基于遥感影像的中国土地覆被制图”项目的一部分,为土地管理者提供了2005年西藏自治区草地类型图和各草地类型面积值。通过诱导各草地类型生长期的平均EVI来反映各草地类型间的相对生物量。灌木草本植物的平均EVI最大,依次为草甸草原、高寒草甸草原、典型草原、高寒典型草原。荒漠草原的平均EVI最低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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