20世纪90年代新疆草地资源的空间格局演变

doi:10.11821/xb200403011

Abstract

Abstract:

Based on GIS techniques and land-use data of Xinjiang in 1990 and 2000, which were interpreted by Landsat TM remote sensing images, the grassland changes were studied carefully. First, the vector format data of the two phases were overlaid and areas of land-use changes were summarized. Then, land-use dynamic degree and transition matrix of the land-use change were calculated, and the grassland quantity changes, i.e. changes between grassland and the other land-use types, as well as its quality changes, i.e. changes among dense-grass, moderate-grass and sparse-grass, were detected clearly. Next, the ARC/INFO-Grid format data set of grassland change was built on the basis of the integrated grassland change information. This data set has perfectly supported the spatial pattern analysis of grassland dynamic change. It was proved that, in the past decade, conversion between grassland and unused land was in equilibrium. However, the total amount of grassland was greatly reduced due to cultivation, afforestation etc. At the same time, a great deal of moderate-grass and sparse-grass changed into dense-grass, which alleviated the impacts caused by the grassland total amount reduction.

Key words: RS&GIS, grassland, land-use change, spatial pattern, Xinjiang

HOU Xiyong, ZHUANG Dafang, YU Xinfang. Grassland Change and Its Spatial Patterns in Xinjiang in 1990s[J].Acta Geographica Sinica, 2004, 59(3): 409-417.

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Grassland Change and Its Spatial Patterns in Xinjiang in 1990s

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