兰州市城市用地的扩张特征  

Characteristics of Urban Land Expansion of Lanzhou City

作　　者：储佩佩[1] 付梅臣[1] 

机构地区：[1]中国地质大学(北京)土地科学技术学院,北京100083

出　　处：《贵州农业科学》2014年第1期210-214,217,共6页Guizhou Agricultural Sciences

基　　金："十一五"国家科技支撑项目"区域土地资源安全保障与调控系统技术集成与示范"(2006BAB15B06)

摘　　要：为揭示城市空间扩展的动态演化机制可控制和引导城市用地合理扩张与可持续发展,以西部典型的河谷型城市兰州市为研究对象,运用GIS空间分析方法,引入单一土地类型动态度指数、弹性系数、年均扩展指数、重心转移模型、城市紧凑度等指标,研究兰州市2001—2008年城市用地扩展的特征与规律。结果表明:研究时段内,兰州市城市用地呈加速扩张的趋势,高速和快速扩展单元主要集中在安宁区与城关区。城市重心向东北迁移了1 325.17m,用地格局由填充式向外延式转变。2001—2004年,城市用地较合理且稳定增长,居住用地涨幅最大;2004—2008年,城市用地大规模无序扩张,公用设施、商服用地比重上升。城市人口增长有力推动了城市用地的扩展,同时,受地形条件的限制,兰州市水平扩展受到制约,空间纵向发展的趋势明显。To reveal the dynamic evolution mechanism of urban space expansion contributes to controlling and guiding reasonable urban land expansion and sustainable development.Taking Lanzhou,a typical river valley city in the west as a case study,the author introduced a series of indices,including land use dynamic index,elasticity coefficient,annual expansion index,gravity center shifting model and urban compactness index,to reveal the characteristics and regularity of urban land expansion in Landzhou during 2001 to 2008 by GIS spatial analysis.The results showed that within the study period,the urban land in Landzhou lay in a tendency of accelerating expansion ,the units with a high and rapid speed-expansion mainly located in Anning District and Chengguan District.The urban gravity center moved 1 325.17 m towards northwest,a cause of intension-to-extension land use pattern.From 2001 to 2004,urban land kept a relatively reasonable and stable growth,but with the largest expansion of residential land;in contrast,a massive but disorder expansion of urban land occurred from 2004 to 2008,especially with an increased weight of land for commerce and public facilities.The research also concluded that the growth of urban population promoted urban land expansion.Besides,the urban land expansion,along with the horizontal direction,was constrained by topographical conditions,but in a significant vertical intensity.

关 键 词：城市用地 用地扩张 兰州 

分 类 号：S2[农业科学—农业工程]