国土资源遥感Issue(2)：125-131,7.DOI:10.6046/gtzyyg.2012.02.23
近40年老哈河流域土地利用变化监测与分析
The Detection and Analysis of Land Use Change in the Laoha River Basin During the Past Four Decades
摘要
Abstract
On the basis of the multiple remote sensing images of Landsat MSS, TM and ETM+ and other auxiliary data, two classification approaches of decision tree and support vector machine were applied to land use/cover classifications in the semiarid Laoha river basin over the past 40 years since the 1970s. The land use changes and their spatial distribution were analyzed quantitatively and mapped with GIS techniques. The results show that land use/cover maps in 1976, 1989, 1999 and 2007 could be generated based on the implementation of support vector machine classification with satisfying results. The analysis shows that land use has changed very obviously in the study area over the last 40 years. The areas of water body and grassland have decreased while rural and urban areas increased persistently. The cultivated land area has increased substantially. Forest land and fallow land have changed in fluctuation with a decrease on the whole. It' s obvious that the most remarkable change has been the interconvereion of lands for agriculture ( cultivated land) , for forestry ( forest land ) , and for animal husbandry (grassland). Moreover, the spatial distribution of the conversion was greatly different in different periods. An analysis of the intensity of land use changes indicates that the highest annual rate of land use change has been increased gradually and the annual intensity has been spatially heterogeneous. Moreover, the suburbs surrounding Chifeng city always have changed intensively during the past decades, suggesting the persistent urbanization of Chifeng city.关键词
遥感/GIS/老哈河流域/土地利用变化/分类Key words
remote sensing/GIS/Laoha river basin/land use change/classification分类
信息技术与安全科学引用本文复制引用
方秀琴,任立良,李琼芳..近40年老哈河流域土地利用变化监测与分析[J].国土资源遥感,2012,(2):125-131,7.基金项目
国家重点基础研究发展(973计划)项目(编号:2006CB400502)、教育部、国家外国专家局"高等学校学科创新引智计划"(编号:B08048)及中央高校基本科研业务费专项资金(编号:2010B08114)共同资助. （973计划）
