Abstract:

Based on RS and GIS，the thesis analyzed the spatiotemporal diversity of urban growth and the response to the landscape pattern on the land use pattern under the different types of geomorphology in terrain transition belt of western Sichuan，Minshang County.The results showed that the distribution characteristics of landscape elements in different geomorphology region changed much during 1975 ~ 1999.Forest land area was 43.787 percent of the whole study area in 1975，which ranked first in the distribution in low mountain areas，high hill areas and middle hill areas.Paddy fields dominated the landscape in low hill areas.Substantial expansions of the city of Mingshan County became an important factor in landscape pattern.Agricultural activities expanded to the terrain higher regional.In the middle hill areas the landscape of paddy fields and dry land increased rapidly，and became the major land use.The distribution of dry land occupied the first place，followed by paddy fields；the garden plot also had a certain amount of distribution in high hill areas.The garden plot had been a larger expansion in the lower hill areas.Conclusively，human disturbance of land system became more ferocity，and the landscape was complex structure，and the pattern broken during this period.Landscape pattern in 1999~2005 was to maintain the basic pattern state as in 1999.Residents and construction continued to grow，particularly in low hill areas.The total patch number reduced，and the mean patch area increased，with patch shape index and patch fractal dimension decreased in low and middle hill areas.Paddy field and dry land reduced，but the garden plot increased in high hill and low mountain areas.The trend of breaking fragmentation decreased.

Key words: land use types/ landscape pattern/ different geomorphologic region/ urban growth/ Mingshang County