Study on the dynamic change of landscape pattern of oasis in arid regions based on RS and GIS methods-application of Jinta Oasis

Landscape ecology is a new field of the macro-ecological research. Study on the landscape pattern change is a research hotspot of the landscape ecology at present. The main research methods in this paper are stated as follows: using remote sensing data to get the basic landscape pattern data of Jinta Oasis in 1990 and 2000; calculating four landscape indexes by utilizing the statistics function of GIS; using the ArcView spatial analysis module to convert the landscape mosaics of the research region into 5m × 5m grids and calculate the transition matrix of the landscape mosaics. The results show: first, the change of the landscape pattern in the oasis relates with the change of water resources. The quantity of the Jinta Oasis water resource changes indistinctively, however, its utilization ratio has increased greatly, which results in a big increase of irrigation land. Secondly, Jinta Oasis would have a tendency towards desertification. Thirdly, county, towns and villages expand quickly and mainly on the bare and unused land. The town inhabited region in Jinta Oasis has the tendency of citification