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利用湖南益阳市2008年1∶1万土地利用现状数据库,采用景观指数分析与空间统计分析方法,对益阳市域土地利用空间梯度特征及影响因素进行研究。研究表明:益阳市土地利用空间梯度特征明显,呈现出“平湖—丘岗—山地”地域梯度、“中心—外围”城乡梯度、道路两侧轴带梯度;自然地理环境、经济社会发展以及差别化的区域发展政策等人为活动因素是土地利用空间梯度差异形成的主要原因,且各影响因素彼此之间相互关联与制约;自然地理环境是土地利用空间梯度差异形成尤其是“平湖—丘岗—山地”地域梯度形成的基础因子,但由于其变化性弱对未来土地利用格局变化的促动作用相对较小;人为活动因素是促进土地利用空间梯度形成及演变的关键性因素,尤其对城乡梯度、轴带梯度的影响较为明显,并主要通过活动强度、活动方式以及活动频率的变化而发挥着不同的作用。
Based on the 1: 10000 land use status database in Yiyang City, Hunan Province in 2008, the spatial gradient characteristics and influencing factors of land use in Yiyang City were studied using landscape index analysis and spatial statistical analysis. The results show that the gradient of land use in Yiyang City is obvious, showing the gradient of “Pinghu - Hilly Kong - Mountain”, the gradient of urban and rural areas “center - periphery ”, the gradient of shaft belt on both sides of the road; the natural geographical environment, economy and society Development and differentiated regional development policies and other human activities are the main reasons for the differences in spatial gradient of land use, and the various influencing factors are interrelated and constrained with each other. The natural geographical environment is the difference in spatial gradient of land use, especially the “Pinghu --Huogang - Mountain ”, but their motivation to change the future land use pattern is relatively small because of their weakness. Human activities are the key factors to promote the formation and evolution of spatial gradient of land use , Especially on the gradients of urban and rural areas and shaft gradients, and plays different roles mainly through changes in activity intensity, activities and frequency of activities.