徐州市主城区土地利用转型过程及机制

Mechanism and process of land use transition in Xuzhou main city zone

基于徐州市主城区1990—2015年6期Landsat TM/ETM+影像解译数据,运用空间信息技术和数理统计方法,分析了1990—1995、1995—2000、2000—2005、2005—2010和2010—2015年5个时间段土地利用转型情况.研究表明:1)整体上,研究区土地利用形态由1990年以耕地为主逐渐转变到2015年以城乡建设用地为主,伴随城乡建设用地的逐年增加,耕地、林地和未利用地逐年减少.2)研究区土地利用转型存在着较大的差异.空间上,西北方不及其他方向;时间上,各方向差异十分明显,东北方及西南方优于其他方向.3)土地利用转型热点区主要集中于各时期建成区周边,空间分布上各时期差异较大,呈现明显的轮换与跃迁特征.4)区域经济中心及道路对土地利用转型具有明显的辐射作用,伴随着距离的增加呈现出明显的梯度变化.5)研究区土地利用转型是自然环境及社会经济等多重因素驱动下所引发的土地供给与需求动态变化过程的结果.

Land use transition of five time buckets periods,which are from 1990 to 1995,from 1995 to 2000,from 2000 to 2005,from 2005 to 2010,and from 2010 to 2015,was analyzed,according to six Landsat TM/ETM+images of Xuzhou main city zone from 1990 to 2015,and special information technologies and mathematical statistics.The results were as follows:1)The main land use pattern of the research area had been transformed into concentrating mainly on city and rural construction land in 2015,from concentrating mainly on cultivated land in 1990.City and rural construction land was increased and cultivated land,forest land and unused land were decreased year by year.2)Big difference of the land use transition in the research area had been found.According to spatial characteristics that in the northwest of the research area was not good as that in other directions.According to time characteristics,big difference had been found in every direction,and those in the northeast and the southwest of the research area were both better than those in other directions.3)The surrounding areas of built up area in each research period were the hot-spot areas of land use transition.Big difference of spatial characteristics had been found in each research period.The rotation and transition features had been obviously discovered.4)Land use transition was visibly influenced by regional economic centers and roads.The gradient had been found along with the increase of the distance.5)The process of land use transition was the result of the dynamic change of land supply and demand caused by the multiple driving forces of natural environment and social economic factors.