以植被指数0.12为指标看我国的荒漠化与草原界限的变化

摘要/Abstract

摘要： 通过对荒漠化描述指标和方法的讨论,最后用植被指数(NDVI)作为描述荒漠化的指标,定性讨论了我国荒漠化和干草原区域近10 a的变化。结果表明,NDVI可以用来作为荒漠化特征的指标,NDVI的0.12线大致与200 mm降水量相对应。近10 a,我国的荒漠化在1998年以后有所扩大。

关键词: NDVI, 荒漠化, 降水量

Abstract: After discussing and comparing desertification index and rainfall, the NDVI index 0.12 was used as the dividing borderline between desertification and degenerated grassland. The changes of the borderline in China were qualitatively discussed in recent 20 years. Results showed that NDVI was a perfect index that used to divide the desertification and degenerated grassland area. The 200 mm isohyet corresponds to the isoline of NDVI 0.12. The desertification area has been extended since 1998 in the north area from the Yellow River, and the most change locates in the transition zone between agriculture and pasture.

Key words: NDVI, desertification, isohyte

中图分类号:

P902

王澄海, 惠小英. 以植被指数0.12为指标看我国的荒漠化与草原界限的变化[J]. 中国沙漠, 2005, 25(1): 88-92.

WANG Cheng-hai, HUI Xiao-ying. Borderline Variations of Desertification and Grassland over China Viewed from NDVI 0.12[J]. JOURNAL OF DESERT RESEARCH, 2005, 25(1): 88-92.

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