基于国产卫星数据的深圳城市化进程中土地利用/覆盖变化探讨
摘要
Land use and land cover (LUCC) change are key components in global environmental change. Urbanization is a factor that leads to large-scale LUCC changes. In this paper, we used CBERS and HJ-1B data for 1999, 2006 and 2010 to analyze the spatial processes of LUCC from 1999-2010 in Shenzhen, China. After applying several image-enhancing processes (including geometric correction, mosaic calculation, cropping, and classification), land use/cover classification maps for each year were generated and used in the calculation of a transfer matrix for the periods 1999-2006 and 2006-2010. We found that large-scale LUCC changes took place in Shenzhen during rapid urbanization. Large areas of grassland, plowed land and unused land were converted to urban land; and, some areas of grassland converted into forest, and vice-versa. Regional differences in LUCC changes in Shenzhen during the past 10 years were significant. With the acceleration of urbanization in Baoan District and Longgang District, the intensity of LUCC gradually increased in rural areas of Shenzhen, but decreased in urban areas. The barycenter of urban land in Shenzhen showed a trend of expansion to the north during urbanization.