摘要
运用地学信息图谱理论方法,基于地理信息系统时空分析模型,以桐柏大别山区20 a土地利用3期(1987、1997、2007)空间数据为基础,通过建立桐柏大别山区土地利用变化图谱和涨落势图谱,分析该区域土地利用变化的时空特征,预测未来土地利用变化的趋势。结果表明:1)1987—2007年,研究区土地利用发生了很大变化,耕地面积持续性减少,林地和建设用地面积持续性增加,草地和未利用地面积先增加后减少,水域面积先减少后增加;2)空间格局上,耕地与林地相互转化遍布整个研究区域,耕地和林地转为建设用地主要分布在各县市周边地区,水域转为耕地和林地主要位于水域与其他用地交接地带;3)涨落势图谱中,林地涨势最明显,增加了5 904.06 km2,占新增图谱单元61.31%,主要来源于耕地和水域转出,耕地落势最明显,减少了6 394.71 km2,占萎缩图谱单元66.41%,主要转为林地和建设用地;4)未来10年,桐柏大别山区土地利用类型仍将以耕地、林地为主。
Based on GIS spatial and temporal analysis model, geo-information atlas theory were used in this paper. Land use data were extracted from spatial data of three periods （ 1987, 1997, 2007 ） in Tongbai-Dabie mountainous area. Land use change atlas and arising/declining atlas from 1987 to 2007 were established. Land use changes characteristic were analyzed, and land use changes were predicted. Results indicate that land use changes significantly during the past 20 years. The area of farmland decreased, and forest land and construction land increased. Grassland and unused land increased firstly, then decreased, vice verse water land decreased firstly, then increased. From the spatial series, mutual transformation between farmland and forest land was obvious in the whole research area. Farmland and forest land transfered to construction land in the nearby of town. Waters transfered to farmland and forest land in the nearby of waters. In arising/declining atlas, the largest expanding atlas was forest land, with an increase of 5 904.06 km2 , accounting for 61.31% in expanding atlas, mainly from farmland and water land. And the largest shrinking atlas was farmland, with a decrese of 6 394.71 km2, accounting for 66.41% in shrinking atlas, mainly transforming into forest land and construction land. In the future, farmland and forest land will continue to be chief land use type.
出处
《中国水土保持科学》
CSCD
2011年第4期16-22,共7页
Science of Soil and Water Conservation
基金
水利部淮河水利委员会“淮河流域生态修复机理和评价指标体系研究”(hwsbc-2007-001)、“淮河流域水土保持区划及分区防治模式研究”(SBJ-2010-002)
林业公益性行业科研专项“生境胁迫立地植被恢复与重建技术研究”(201104002-6)
关键词
地学信息图谱
时空变化
土地利用
桐柏大别山区
geo-information atlas
spatio-temporal changes
land use
Tongbai-Dabie mountainous area
