摘要
应用地学信息图谱将土地利用与地形特征相结合,可准确表达地形复杂的土地利用时空属性与演变特征,对区域土地利用格局优化具有现实意义。该文基于1995-2015年的DEM和遥感数据,构建土地利用演变图谱和地形分析模型,借助ArcGIS软件从土地利用结构和图谱演变类型两个角度分析了河北浅山区土地利用时空演变特征及地形效应。结果表明:1)1995-2015年研究区土地利用以稳定型图谱为主,用地类型以林地、耕地、草地为主,林地、耕地和未利用地总量减少,其余地类总量增加;发生变化的图谱类型以前期变化型的林地转出为主,其次为后期变化型的耕地转出。2)土地利用类型在地形梯度上存在相似性和差异性,低地形位和高地形位是建设用地、耕地和水域的优势分布区,中地形位是林地和草地的优势分布区,未利用地的优势分布从中地形位向低地形位或高地形位转移。3)土地利用演变图谱在地形梯度上差异明显,低地形位是稳定型、前期变化型和后期变化型图谱的优势分布区,土地利用结构较稳定;中地形位不存在优势分布的图谱类型和演变模式,土地利用复杂且变化剧烈;高地形位是各演变类型优势分布的集中区,土地利用多元化。该研究可为河北浅山区生态建设和国土空间规划提供参考。
Geo-informatic Tupu combines land use with terrain features,which can be used to accurately describe the spatial-temporal attributes and evolution characteristics of land use in areas of complex terrain.This is of practical significance for the optimization of regional land use patterns.In this paper,we have adopted Geo-informatic Tupu and the terrain analysis model to analyze the spatial-temporal evolution and terrain characteristics of land use in Hebei shallow mountainous areas using the ArcGIS software.This study was based on DEM and remote sensing data in 1995-2015.The results are summarized as follows.1)Between 1995 and 2015,land use change Tupu was primarily featured by the stable type being composed mainly of forestland,farmland and grassland.The total amount of forestland,farmland and unused land decreased,while the amount of other lands increased.The changes in the Tupu type of land use were mainly reflected by the transfer-out of forestland in the early stage and the transfer-out of farmland in the later stage.2)Land use types had similarities and differences in terrain gradient.Low terrain gradient and high terrain gradient were dominant for construction land,farmland and water,while medium terrain gradient was dominant for forestland and grassland.Moreover,the dominant distribution of unused land shifted from the medium terrain gradient to the low or high terrain gradient.3)The Tupu types of land use change had significant differences in terrain gradient.Low terrain gradient was found for dominant distribution areas of the stable type,the early-stage change type and the later-stage change type.In addition,the structure of land use was relatively stable for areas with low terrain gradient.There were not any dominant distribution Tupu types and evolution patterns of land use for medium terrain gradient,where the land use types and changes were complex and diverse.High terrain gradient was found for the concentrated dominant distribution area of each Tupu type and its land use types were diversified.The
作者
刘欣
朱苏加
赵艳霞
李荣华
LIU Xin;ZHU Su-jia;ZHAO Yan-xia;LI Rong-hua(Institute of Geographical Sciences,Hebei Academy of Sciences/Hebei Engineering Research Center for Geographic Information Application,Shijiazhuang 050011,China)
出处
《地理与地理信息科学》
CSCD
北大核心
2020年第4期94-101,共8页
Geography and Geo-Information Science
基金
河北省软科学研究计划项目(194576121D)
2019年度河北省社会科学发展研究课题(2019031203004)。
关键词
土地利用
地学信息图谱
地形效应
时空演变
河北浅山区
land use
Geo-informatic Tupu
terrain effects
spatial-temporal evolution
Hebei shallow mountainous areas
