%0 Journal Article
%T Land use change characteristics along the terrain gradient and the spatial expanding analysis: A case study of Haidian District and Yanqing County, Beijing<br>土地利用变化的地形梯度特征与空间扩展——以北京市海淀区和延庆县为例
%A CHEN Li-ding
%A YANG Shuang
%A FENG Xiao-ming
%A <br>陈利顶
%A 杨 爽
%A 冯晓明
%J 地理研究
%D 2008
%I 
%X Studying land use change and its spatial expansion along the terrain gradient is of great significance for identifying the direction of land use change and its sustainable use.In this paper,a case study was conducted in Haidian District and Yanqing County of Beijing by comparing land use pattern in 1992,and 2002 with regard to terrain niche index using remote sensing image interpretation.It was found that:(1) A clear difference exists in land use change between Haidian District and Yanqing County.In Haidian District,the built-up area expands to both higher and lower terrain niche areas with economic development and population growth.Farmland and orchard are extruded to the higher terrain niche area due to urban expansion.Woodland in high terrain niche area is well restored,and further expands to the lower terrain niche area.The unused land,grassland and shrubberies are remarkably constricted in the middle and high terrain niche areas with the intrusion of woodland,and reduced in the low terrain niche sections due to farmland increase.In Yanqing County,the built-up area is obviously confined by the terrain niche and is mainly located in the low terrain niche area as well as the farmland.Orchard,however,is shifted to the higher terrain niche area with the economic development.Woodland is well restored in the higher terrain niche area,and the predominant distribution of the unused land,grassland and shrubberies is reduced.(2) A common point was found in both Haidian District and Yanqing County.Ecological conservation was well carried out in the both areas in recent decade,and consequently natural vegetation was restored appropriately.A difference in land use change is that land use in Haidian District is more affected by the economic development than that in Yanqing County.The built-up area spreads out faster in Haidian District,and farmland was extruded to higher terrain niche area under the pressure of urban expansion in Haidian District,while they are both constricted in the low terrain niche area in Yanqing County.
%K land use change
%K terrain gradient
%K terrain niche index
%K Beijing<br>土地利用变化
%K 地形梯度
%K 地形位指数
%K 北京地区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=C0C75E88BA2EE501C8298896F64A711F&aid=91E8F99CFE452CEDDD40C20F104962B5&yid=67289AFF6305E306&vid=DB817633AA4F79B9&iid=B31275AF3241DB2D&sid=7D257F36093061DE&eid=A31F2945A5873795&journal_id=1000-0585&journal_name=地理研究&referenced_num=6&reference_num=25