Research on the change of grassland vegetation coverage using 3S technology in Gannan

Abstract

Abstract: Using the dimidiate pixel model and 3S technique (GIS, RS, GPS), a new vegetation coverage analyze model was built on the basis of the NDVI vegetation index. The vegetation coverage was estimated in Gannan state in 2002, 2004, 2006 and 2008 with MODIS data and the characteristics of the vegetation coverage dynamics was analysed. From 2002 to 2008, the deterioration of rangeland vegetation coverage in Gannan was general, and the degradation level of the first stage vegetation was high. The change in grassland vegetation cover reflected the trend of conversion from high-stage (the 1st and 2nd stage) to low-stage (the 4th and 5th stage) coverages. It further confirmed that the grassland vegetation in Gannan area is progressively degrading more seriously. The result will be useful for further academic research and rangeland management.

CLC Number:

S812-05

WANG Hao, LI Wen-long, DU Guo-zhen, ZHU Xiao-li. Research on the change of grassland vegetation coverage using 3S technology in Gannan[J]. Acta Prataculturae Sinica, 2012, 21(3): 26-37.

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