| 摘要: |
| 根据1990、2005和2015年共3期Landsat卫星影像资料及其他辅助资料，运用遥感（RS）人机交互目视解译方法进行监督分类，并应用地理信息系统（GIS）的空间分析和统计功能，分别制作3期土地利用转移矩阵及1990-2015年的土地利用类型动态变化图，分析西藏林芝地区土地利用的动态变化特征，以及各类型之间的转化情况。结果表明：研究区土地利用类型主要以林地、未利用土地、草地和水域为主，其中林地面积最大，占林芝地区总面积的52.5%；其次为未利用地，占25.9%。1990-2015年，林芝地区林地面积减少118.4 km2，变化面积最大，主要转化为草地和未利用地；水域和未利用地次之，面积分别增加32.65和32.06 km2，水域主要由未利用地和草地转化而来，未利用地的增加主要由草地和林地转化而来；耕地面积增加26.89 km2，主要由林地转化而来；城乡、工矿、居民用地和草地面积分别增加16.96和9.84 km2，变化幅度相对最小。土地利用变化存在明显的区域差异，林芝地区北部变化明显强于南部变化。 |
| 关键词: 地理信息系统(GIS) 遥感(RS) 土地利用 动态变化 空间分析 |
| DOI：10.11841/j.issn.1007-4333.2019.10.19 |
| 分类号: |
| 基金项目:西藏自治区重点科研项目（XZ201703-GC-11） |
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| Dynamic change of land use types in Linzhi prefecture of Tibet based on RS and GIS |
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SU Libin1, GUO Yonggang2, WU Yue2, YANG Yongtao2
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1.Institute of Tibet Plateau Ecology, Tibet Agriculture and Animal Husbandry University, Linzhi 860000, China;2.Water Conservancy Project & Civil Engineering College, Tibet Agriculture and Animal Husbandry University, Linzhi 860000, China
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| Abstract: |
| According to the Landsat satellite imagery and other ancillary data in 1990,2005 and 2015,the remote sensing (RS) human-computer interaction visual interpretation method was used for supervised classification,and the spatial analysis and statistical functions of geographic information system (GIS) were applied.The three-stage land use transfer matrix and the dynamic change map of land use types from 1990 to 2015 were produced,the dynamic characteristics of land use in the Linzhi region of Tibet and the transformation between various types were analyzed.The results showed that:The land use types in the study area were mainly forest land,unused land,grassland and water area.Among which the forest land area was the largest,accounting for 52.5% of the total area of Linzhi area and followed by unused land,accounting for 25.9%.From 1990 to 2015,the forest area of Linzhi area decreased by 118.4 km2,and the area of change was the largest,which was mainly converted into grassland and unused land;The water area and unused land were second,and the area increased by 32.65 and 32.06 km2,respectively.The water area was mainly composed of unused land and the conversion of grassland was mainly caused by the conversion of grassland and forest land;The area of cultivated land increased by 26.89 km2,which was mainly converted from forest land.The urban and rural areas,industrial and mining,residential land and grassland area increased by 16.96 and 9.84 km2.The magnitude of the change was relatively minimal.In conclusion,there are obvious regional differences in land use change,and the change in the northern part of the Linzhi region is significantly stronger than that in the south. |
| Key words: GIS RS land use dynamic changes spatial analysis |
