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Remote Sensing Technology and Application  2010, Vol. 25 Issue (5): 707-713    DOI: 10.11873/j.issn.1004-0323.2010.5.707
article     
Vegetation Coverage Estimation over Tibetan Plateau Using MODIS Data
CHU Duo1,CIREN Duo-ji2,WANG Cai-yun1,JI Qiu-mei3,DE Yang1
(1.Tibet Institute of Plateau Atmospheric and Environmental Sciences,Lhasa 850000,China;
2.Lhasa Meteorological Bureau,Lhasa 850000,China;
3.Tibet Institute of Animal Husbandry,Lhasa 850000,China)
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Abstract  

The relationships between NDVI and SAVI from MODIS(Terra) imagery on September 13 and 14,2004,and vegetation coverage derived from field measurements investigated at same time with MODIS data in central Tibetan Plateau are analyzed.Another hand,after selected typical grassland vegetation region in central Tibetan Plateau and whole Tibetan Plateau as two study areas,the accuracy of Carlson and Ripley algorithm of vegetation coverage is validated using field measurements in this paper.The main conclusions are as follows.
(1) The relationship coefficient between NDVI and vegetation coverage from field investigation is 0.95(R2= 0.90),between SAVI and vegetation coverage reaches 0.94(R2=0.89).
(2) There is high relationship between vegetation coverage based on the field measurements and estimation from Carlson and Ripley algorithm,coefficients are greater than 0.94; it was found that Carlson and Ripley algorithm is suitable for the middle grassland vegetation coverage.
(3) Overall,the vegetation coverage over Tibetan Plateau is low; the area of vegetation coverage lower than 20% covered more than 50% of total area.The vegetation coverage between 1%~10% is the largest area(35.36%) and it mainly distributed over northwestern area and south of Mountain Kunlun in Tibetan Plateau.The area of 100% of vegetation coverage is 122 538.88 km2 and it covered 10.72% of the total area,which distributed in southeastern Tibetan Plateau where dominated by forest vegetation.The distribution pattern of vegetation coverage over Tibetan Plateau decreases from southeast to northwest in Tibetan Plateau.

Key words:   Vegetation coverage      MODIS      Tibetan Plateau     
Received:  16 March 2010      Published:  30 October 2013
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CHU Duo
CI Ren-Duo-Ji
WANG Cai-Yun
JI Qiu-Mei
DE Yang

Cite this article: 

CHU Duo, CI Ren-Duo-Ji, WANG Cai-Yun, JI Qiu-Mei, DE Yang. Vegetation Coverage Estimation over Tibetan Plateau Using MODIS Data. Remote Sensing Technology and Application, 2010, 25(5): 707-713.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2010.5.707     OR     http://www.rsta.ac.cn/EN/Y2010/V25/I5/707

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