Land expansion of oasis cities and its spatial pattern in north slope of Tianshan Mountain,Xinjiang
In this paper,using GIS and RS technology,based on TM/ETM Images of two periods of 1990 and 2007,through the man-computer interactive interpretation,the current land utilization map of studying area were given.By the technology of GIS special analysis,the land expansion of north slope of Tianshan Mountain and its spatial pattern were analyzed.The results showed that during 1990-2007,the cultivated land changed more obviously,and cultivated land,grassland and sandy land changed most greatly in this area,and woodland and grassland are the main source of other growth area increasing.The scale of town,rural residential and other construction land changed much less than other land,but their changing emission and development trends were more obvious and the construction land was the irreversible land cover type.Limited by the southern mountains,flat plains of the northern area was the main expansion direction of agriculture land and construction land.From the view of spatial pattern,the change of land use structure of the counties in this area was similar,which decreased the proportion of forest and grassland and increased the proportion of cultivated land and construction land.The trend of Peri-urban agricultural land converted to urban land use was evident,and the new rural residential land came from the surrounding agricultural land and unused land.
oasis cityurban land expansionspatial structureland use structure
NETL
NSTL
万方数据
维普
