摘要
为探讨镇域尺度土地利用/覆盖变化(LUCC)的时空演变规律及主导因素驱动力,采用GIS空间分析方法并结合适用于镇域网络研究的重力模型、反映LUCC景观格局信息的景观指数,通过引入土地利用程度综合指数、耕地占补平衡指数、LUCC时空演变综合评价模型来对研究区域进行镇域尺度的LUCC变化情况可视化表达.(1)乡村人口密度越大、地区经济发展水平越高的乡镇,其LUCC变化强度越强,相应的斑块景观破碎度越大、景观丰富度越高、景观形状和结构越复杂,这种LUCC变化规律主要反映在耕地、农村居民点用地、建制镇用地等用地类型的变化上.(2)耕地占补平衡政策对区域LUCC的变化具有明显的导向性,特别是对区域耕地面积、农村居民点用地面积的变化上起着直接有效的影响,城乡建设用地增减挂钩政策落实越好的乡镇耕地占补平衡指数波动越小,土地利用变化强度越小,其用地变化类型主要反映在农村居民点用地与耕地之间的相互转化.镇域尺度的LUCC主导因素驱动力为乡村人口密度、人均GDP、耕地占补平衡政策,LUCC的变化强度与人口、经济因子呈正相关,与政策因子呈负相关.
In order to explore the spatial and temporal evolution law of land use/cover change(LUCC)on the scale of town area and the driving force of leading factors,GIS spatial analysis method was adopted,combined with the gravity model suitable for the study of town area network to reflect the landscape index of LUCC landscape pattern information.By introducing comprehensive index of land use degree,balance index of cultivated land occupation and compensation,and comprehensive evaluation model of LUCC spatio-temporal evolution,the LUCC variation at the town scale was visualized in the study area.1)The higher the rural population density and the higher the regional economic development level,the stronger the LUCC change intensity of the township.Correspondingly,the greater the patch landscape fragmentation degree and the higher the landscape richness,the more complex the landscape shape and structure are.The change law of LUCC is mainly reflected in the change of land types such as arable land,land for rural settlements and land for towns.2)The policy of balance of farmland occupation and compensation has an obvious guiding effect on the change of regional LUCC,especially on the change of regional cultivated land area and land area of rural residential areas.The better the policy of linking the increase and decrease of urban and rural construction land is implemented,the smaller the fluctuation of the balance index of farmland occupation and compensation in townships and towns is,and the smaller the intensity of land use change is.The change type of land use mainly reflects the mutual transformation between land use and farmland in rural residential areas.The driving forces of the leading factors of LUCC at the township scale are rural population density,per capita GDP,and the balance policy of farmland occupation and compensation.The change intensity of LUCC is positively correlated with population and economic factors and negatively correlated with policy factors.
作者
张秀鹏
ZHANG Xiupeng(Institute of Urban Planning and Design,Nanjing University,Nanjing 210093,China)
出处
《南阳师范学院学报》
CAS
2020年第1期1-10,共10页
Journal of Nanyang Normal University
基金
国家自然科学基金重点项目(41531180)
关键词
LUCC
时空演变
驱动力
仪征市
LUCC
spatial and temporal evolution
driving force
Yizheng City
