A study on land use/cover change in Beijing area
HE Chun-yang, SHI Pei-jun, CHEN Jin, ZHOU Yu-yu (Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China, Beijing Normal University; Institute of Resources Science, Beijing Normal University, Beijing 100875, China)
In the paper, based on the LandsatTM/MSS data in 1975, 1984, 1991 and 1997, the land use/cover change in Beijing area was examined with the support of RS and GIS. Conclusions of the study are drawn as follows: The large-scale land use/cover change took place in Beijing area in the process of rapid urbanization from 1975 to 1997 with major characteristics of urban expansion at the expanse of encroaching cultivated lnad in the plain area and of obvious structural readjustment occurring in other land use/cover types. There existed obvious regional difference in land use/cover change in Beijing area during the past twenty-odd years and the land use/cover change rate in exurb has already exceeded that in suburb in the 1990s. With drastic land use/cover change in the region, the barycenterof the high-density urban land moved to the northwest to certain extent during the past decades, showing that the urban land use density in the west and northwest of Beijing city improved obviously with the expanding trend to the west and northwest in the same period.