基于GIS的安庆市土地利用动态变化及其驱动力分析

Analysis of Land Use Dynamic Change and Drivers of Anqing City Based on GIS

土地利用变化是人类活动与自然环境相互作用最直接的表现形式。该研究根据1990、2000、2013年遥感影像及安庆市行政区划图,基于RS和GIS的技术手段,对研究区土地利用类型进行信息提取,得到3个时段的土地转移数据,建立总动态度模型、单一土地利用类型动态度模型、地类活跃度等模型,对安庆市土地利用变化情况进行分析。结果表明,1990-2000年、2000-2013年、1990-2013年安庆市土地利用动态度分别为0.512%、8.194%、4.741%;高覆盖度草地和灌木林的转入、转出最为活跃。造成安庆市2000-2013年土地利用大幅变化的主要驱动力是退耕还林、退耕还湖、＂861＂行动计划等战略计划及人口增长。

Land use change is the most direct form of expression about the human activities and natural environment interaction.According to remote sensing image of 1990,2000,2013 and Anqing City administrative map,based on RS and GIS technology,information about land use types in the study area was extracted,land transfer data in three periods were obtained.The variation of land use was analyzed through establishing general dynamic model,single land use type dynamic model,land type activity model.The results showed that land use dynamic degree of Anqing City in 1990-2000,2000-2013,1990-2013 are 0.512%,8.194%,4.741%;transfer in and out of high coverage grassland and shrub are most active.The main drivers for land use change in Anqing City during 2000-2013 include returning farmland to forest,returning farmland to lake,＂861＂action plan and population growth.