摘要
为了探明南水北调中线水源区土地利用/覆被变化情况及其驱动因素,为土地的科学合理利用及可持续发展提供科学依据,采用RS和GIS技术相结合的方法,全面分析了南水北调中线水源区1990—2010年土地利用空间格局特征及其时空变化,并对土地利用变化的驱动因素进行了详尽分析。结果表明:1)研究区土地利用类型以林地、耕地、草地为主,其独特的地形特征塑造了该区域的土地利用空间格局特征,其土地利用变化以林地、耕地和草地之间的相互转变为主。2)1990—2000年研究区土地利用发生变化的面积为25 675.72km2(占总面积的26.91%),2000—2010年变化的面积为20 802.6km2(占总面积的21.81%)。3)研究区域土地利用/覆被变化受自然因素和人文因素的共同影响,其中,人文因素是流域土地利用格局变化的直接驱动力;流域人口剧增造成的消费需求以及社会经济的发展是流域耕地变化,进而导致流域系列土地利用变化的根本原因。
To provide a reference for scientific utilization,rational exploitation and sustainable development of land in the water source of Middle-Route of South-to-North Water Diversion Project,the characters of land utilization variation were analyzed by using remote sensing data and other correlative data in the study area from 1990 to 2010 and main factors affecting land utilization variation were analyzed by using GIS and RS.Results： 1） The major land covers were forest,grassland and cropland.The special terrain and the topography affected the spatial distribution pattern of land use.The main transforming processes were the land use conversion between forest,grassland and cropland.2） From 1990 to 2001,the total area of land cover conversion was 25 675.72 km2,which was 26.91% of the study area.And from 2001 to 2010,the total area of land cover conversion was 20 802.6 km2,which was 21.81% of the study area.3） The LUCC in MR-SNWD was commonly affected by natural and human factors.The human factors such as policy,economic development and population growth and so on,were the direct driving force.The rapidly increasing population caused severe farmland changes,and then caused serial land use changes.
出处
《贵州农业科学》
CAS
北大核心
2013年第6期167-171,共5页
Guizhou Agricultural Sciences
基金
河南省科技攻关计划项目"南水北调中线水源区LUCC驱动机制及生态效应研究"(122102310420)
河南省教育厅自然科学研究计划项目"南水北调中线水源区森林景观格局
过程及其生态效应研究"(2009B180023)
关键词
土地利用
覆被变化
驱动因素
南水北调工程
land use/cover change
driving force
Middle-Route of the South-to-North Water Diversion Project
