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《Chinese Journal of Soil Science》 2012-06
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Landscape Pattern Evolution Analysis in Shiyang River Basin Based on GIS

WEI Wei 1,SHI Pei-ji 1,WANG Xu-feng 2,LIU Chun-yu 1(1.College of Geographical and Environment Science,Northwest Normal University,Lanzhou 730070,Gansu,China; 2.Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China.)  
Choosing four issues of Landsat/TM images of the arid interior district Shiyang River basin from year 1986 to 2006,and using landscape ecological theory.The time and space changes of landscape pattern were combined to research basic ecological safety,compactness of landscape pattern and spatial difference of ecological function.The results showed that grassland and sandy desert had the superiority in the whole basin,but farmland occupied overwhelming superiority in Wuwei oasis.In Minqin oasis,farmland and sandy desert dominated together.The main changes of the landscape were that farmland and sandy desert were increasing,but woodland and grassland were decreasing in Minqin oasis.Wholly,the landscape structure was stable,but in the basin of small region,the landscape evolves was more prominent.The landscape change positions mainly occurred in the middle and lower reaches,such as Wuwei and Minqin oasis,while the changes of landscape structure mainly centralized in desert-oasis ecotone.Particularly from 2000 to 2006,it was obvious that the oasis development was in Wuwei oasis,farmland was increasing apparently,while sandy desert was decreasing massively.However,in Minqin oasis,farmland was increasing as well,but the desertification was faster than agriculturalization and the oasis development.
【Fund】: 国家自然科学基金项目(40971078);; 甘肃省青年科技基金计划项目(1107RJYA077);; 西北师范大学青年教师科研能力提升计划项目(SKQNYB10034)联合资助
【CateGory Index】: P208;P901
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