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The characteristics of oasis urban expansion and drive mechanism analysis:a case study on Ganzhou District in Hexi Corridor,China

查看全文 作　　者：HuaLi [1]Tong;PeiJi [1]Shi;GuoFeng [1,2]Zhu;April [1]Pearson;QianGuo [1]Li;YuanFeng [1]Liu;HaiLong [1]Liu 高影响力作者 机构地区：[1]College of Geography and Environmental Science,Northwest Normal University;[2]State Key Laboratory of Cryosphere Sciences,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences高影响力机构 出　　处：《Research in Cold and Arid Regions》索引2015年第7卷第3期,共11页高影响力期刊 基　　金：supported by a project of the National Natural Science Foundation of China(Grant No.41271133);the improvement plan of scientific research ability in Northwest Normal University(NWNU-LKQN-13-10);Open-ended fund of State Key Laboratory of Cryosphere Sciences,Chinese Academy of Sciences(SKLCS-OP-2014-11) 摘　　要：Ganzhou District is an oasis city in the Zhangye Municipality of Gansu Province,China.Based on multi-temporal TM and ETM satellite remote sensing data in 1985,1996,2000,and 2012,and by using corrected figures of land use status over the same periods,the spatial area of Ganzhou District since 1985 was extracted with statistical methods,and urban spatial expansion was measured by quantitative research methods.The characteristics of spatial expansion of Ganzhou District were analyzed by urban expansion rate,expansion intensity index,compactness,fractal dimension,and the city center shift method.The results showed that the built-up area of Ganzhou District increased by 3.46 times during 1985–2012.The expansion in 1985–1996 was slow,during 1996–2000 it was rapid,and during 2000–2012 it was at a high speed.This city mainly expanded to the northeast and northwest.Government decision making had a decisive influence on urban expansion.Initially the expansion was uniform,but later the local transportation,economy,resources,population,and national policies factors had an obvious influence on urban expansion. 关 键 词：城市扩张 绿洲城市 甘州区 河西走廊 机构分析 中国 土地利用现状图 传动
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