基于的GIS兴平市城市用地扩展时空特征分析  

Characterization of Spatial-temporal Expansion of Urban Land in Xingping City Based on GIS

作　　者：王荣[1] 刘晓曼 刘世锋[1] 

机构地区：[1]天水师范学院资源与环境工程学院,甘肃天水741001 [2]环境保护部卫星环境应用中心,北京100101

出　　处：《天水师范学院学报》2015年第2期15-20,共6页Journal of Tianshui Normal University

基　　金：天水师范学院中青年教师科研资助项目"天水市绿地防灾规划建设"(TSA0925)阶段性成果

摘　　要：以兴平市行政区划边界及多时相TM遥感影像为基础，基于eCognltl0n、GIS等空间分析软件平台，运用缓冲区分析方法，提取城市建设用地信息，并利用年均扩展强度指数、年均扩张率、城市用地扩展弹性等特征指数指标进行定量分析．结果表明：（1）关中一天水经济区建设的启动促使2009~2014年城市用地扩展强度分别是1999～2004、2004～2009年的4．83、4．67倍；（2）城市用地呈显著的“圈层式”扩展模式及“过渡式”演变结构；以5km缓冲区为分水岭，5km以内，呈”快-中-慢“的空间分异演变模式；5km以外，呈“低一中一快”的空间分异演变模式；（3）2009-2014年城市用地扩展比较集中，且扩展面积比1999-2004、2004～2009年分别增大了4．83、4．67倍；兴平市十二五规划工业园区集群发展与历史文化、依傍渭河一带旅游商贸区的开发使得主要分布在西宝、西兰两条主干高速交通道所形成的象限的第1、III象限．Based on political boundaries ent periods, this study extracts the land map and TM remote sensing images use information of urban Xingping （1999, 2004,2009 and 2014） in differ- by used the method of buffer analysis built in GIS , eCognition spatial analysis techniques. The annual expansion intensity index, annual expansion rate and expansion elasticity of urban land use were used to quadrant analysis the differentiation of urban space expan- sion in each priod. Results indicated that the urban expansion area and the annual expansion intensity index basic maintained steady in1999-2004 and 2004-2009, but the urban expansion area and expansion intensity increased rapidly in 2009-2014, which respectively were 4.83 and 4.67 times of 1999-2004 and 2004-1009, the reason of which mainly was the construction of Guanzhong-Tianshui economic zone in 2009. The urban land use showed markedly a kind of ＇sphere-type＇ expansion mode and ＇transition＇ evolution structure, as a watershed, the urban land expansion rate was slow, and showed a ＇rapid-medium-slowly＇ expanding space differentiation evolution mod- el in 5km; but the urban land expansion rate was accelerated, and showed a ＇low medium-medium fast- fast＇ ex- panding space difi）rentiation evolution model beyond 5km among 1999-2004, 2004-2009 and 2009-2014.Com- pared with 1999-2004, 2004-2009, the urban land expansion area of XingPing city increased 4.82 and 4.66 times respectively in 2009-2014, and the space distribution more concentrated, mainly distributed in I and III quadrant formed by Xibao and Xilan two major traffic artery, the main reason of this phenomenon is industrial cluster develop- ment and the development of the historical culture, tourism business district near the river area of five-year planning in Xingping City.

关 键 词：GIS 城市用地扩张 年均扩展强度指数 兴平市 

分 类 号：P217[天文地球—测绘科学与技术]