关键词: 遥感, GIS, 干旱区, 金塔绿洲, 景观破碎化

Abstract: Based on Remote Sensing and GIS, this paper quantified the landscape fragmentation of Jinta oasis by using the patch density, corridor density, fragmentation, separation, patch size coefficient of variation and area standard deviation. From 1990 to 2000, the landscape fragmentation degree in Jinta Oasis descended slightly. In the landscape type level, the landscape fragmentation degree of the matrix(bare soil, bare rock and gravel land) increases, meanwhile, the area of the matrix decreases, which shows that the influence of human beings on matrix increases. The irrigated land area rises and the total number of patches decreases. So the distribution of irrigated land is more centralized and the fragmentation becomes lower. The area of city and town inhabitant land increases clearly. Its fragmentation increases and separation index decreases. The human activities have contributed to the changes of fragmentation degree in Jinta oasis. Dense corridor system is one of most extrusive characteristics of the arid region. The corridor density of the irrigated land, forest and resident area is maximal, showing that the effect of oasis corrriod on them is the most. The corridor density has relation with the landscape fragmentation. The pattern of Jinta oasis embodies the characteristic of typical agriculture oasis in Gobi and desert matrix influenced by human beings.

Key words: Remote Sensing, GIS, arid regions, Jinta oasis, landscape fragmentation