湖北农业科学 ›› 2022, Vol. 61 ›› Issue (14): 68-73.doi: 10.14088/j.cnki.issn0439-8114.2022.14.011

• 资源·环境 • 上一篇    下一篇

基于GIS的川藏铁路沿线LUCC动态变化

曹宇鹏, 方江平, 关丽雪, 徐迪   

  1. 西藏农牧学院高原生态研究所/西藏林芝高山森林生态系统国家野外科学观测研究站/西藏高原森林生态教育部重点实验室/西藏自治区生态安全联合实验室,西藏 林芝 860000
  • 收稿日期:2021-07-02 出版日期:2022-07-25 发布日期:2022-08-25
  • 通讯作者: 方江平(1967-),男,安徽安庆人,教授,博士,主要从事高原生态修复与可持续发展研究,(电子信箱)xzfjp@sina.com。
  • 作者简介:曹宇鹏(1996-),男,广东惠州人,在读硕士研究生,研究方向为生态安全与森林生态,(电话)13532127628(电子信箱)627980387@qq.com。
  • 基金资助:
    国家重点研发计划课题(2016YFC0502006); 西藏生态安全联合重点实验室开放基金项目(STAQ-2021Y-6)

Dynamic change of LUCC along Sichuan-Tibet railway based on GIS

CAO Yu-peng, FANG Jiang-ping, GUAN Li-xue, XU Di   

  1. Institute of Plateau Ecology/National Field Scientific Observation and Research Station of Alpine Forest Ecosystem in Nyingchi, Tibet/Tibet Key Laboratory of Forest Ecology in Plateau Area, Ministry of Education/Joint Laboratory of Ecological Security of Tibet Autonomous Region, Tibet Agricultural and Animal Husbandry University, Nyingchi 860000, Tibet,China
  • Received:2021-07-02 Online:2022-07-25 Published:2022-08-25

摘要: 以川藏铁路沿线各县为研究对象,基于GIS的空间分析功能,对2000、2005、2010年与2015年土地分类进行处理,获得川藏铁路沿线各县土地利用转移矩阵,进而利用标准差椭圆分析土地利用变化的空间全局特征。结果表明,2000—2015年,研究区域土地利用类型主要以草地、林地和未利用地为主,其中草地平均占比最大,达46.34%,其次是林地,占27.55%,未利用地平均占18.50%,水域、耕地和建筑用地平均分别占3.90%、3.26%和0.45%。2000—2015年,建筑用地、林地、未利用地和水域面积分别增加181.62、26.92、35.68、12.73 km2;耕地和草地面积分别减少171.63 km2和85.37 km2。2000—2005年各土地利用类型变化率大小表现为建筑用地>耕地>未利用地>水域>林地>草地。土地利用类型变化有明显的区域差异,铁路东段变化高于中段与西段。2005—2010、2010—2015年相较于2000—2005年土地利用类型变化范围更小,空间离散度更高,且后2个时期已趋于稳定,变化中心由白玉县向东南迁移至康定市。主要变化的覆盖范围有向西、南方向扩张的趋势。

关键词: GIS, 川藏铁路, LUCC(土地利用与覆被变化), 标准差椭圆, 空间分析

Abstract: Based on the spatial analysis function of GIS, the land use transfer matrices of counties along the Sichuan-Tibet Railway were processed in 2000, 2005, 2010 and 2015, and then the spatial global characteristics of land use change were analyzed by using standard deviation ellipse. The results showed that the main types of land use in the study area were grassland, woodland and unused land. Grassland average accounted for the largest proportion of 46.34%, followed by woodland, which accounted for 27.55%, and unused land average accounted for 18.50%. Water area, cultivated land, and construction land average accounted for 3.90%, 3.26% and 0.45%, respectively. During 2000—2015, the area of construction land, woodland, unused land and water area increased by 181.62, 26.92, 35.68, 12.73 km2, respectively; the area of arable land and grassland decreased by 171.63 km2 and 85.37 km2, respectively. The change rate of each land use type in 2000—2015 was construction land>cultivated land> unused land > water area > woodland > grassland. There were obvious regional differences in land use type changes, and the changes in the eastern section of the railway were higher than those in the middle and western sections. From 2005 to 2010, from 2010 to 2015, compared with 2000 to 2005, the land use type change range was smaller, and the spatial dispersion was higher. The latter two periods had stabilized, with the center of change from Baiyu County to the southeast to Kangding City. The coverage of the main changes had a trend of expanding west and south.

Key words: GIS, Sichuan-Tibet Railway, LUCC(land use and cover change), standard deviation ellipse, spatial analysis

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