湖北农业科学 ›› 2021, Vol. 60 ›› Issue (9): 50-55.doi: 10.14088/j.cnki.issn0439-8114.2021.09.009

• 资源·环境 • 上一篇    下一篇

基于遥感的衡邵干旱走廊土地利用空间格局演变

赵莎, 郑文武   

  1. 衡阳师范学院城市与旅游学院,湖南 衡阳 421002
  • 收稿日期:2020-05-08 发布日期:2021-05-14
  • 作者简介:赵 莎(1997-),女,湖南益阳人,在读硕士研究生,研究方向为GIS技术应用,(电话)15116788980(电子信箱)zhaosha_622@163.com。
  • 基金资助:
    衡阳师范学院大学生研究性学习和创新实验计划省级项目(CX1703);湖南省研究生科研创新项目(CX20190981)

Spatial pattern evolution of land utilization in Hengshao drought corridor based on remote sensing

ZAHO Sha, ZHENG Wen-wu   

  1. College of City & Tourism, Hengyang Normal University, Hengyang 421002, Hunan, China
  • Received:2020-05-08 Published:2021-05-14

摘要: 衡邵干旱走廊是南方典型的干旱区,不合理的土地利用格局加剧了灾害的发生风险,因此,理清衡邵干旱走廊土地利用空间格局演变特征对深入理解干旱发生机理具有重要意义。利用衡邵干旱走廊2000—2017年3期遥感影像数据,应用GIS空间分析和土地利用变化指数模型,从土地利用变化速度、转移方向2个方面定量分析了衡邵干旱走廊 2000—2017年土地利用空间分布特征,并结合气象观测数据分析了不同干旱程度下的土地利用演变规律。结果表明,农业用地面积随着城镇化进程的加快在不断减少,占比从2000年的52.63%下降到2017年38.89%,主要分布在主城区及周边县区,水体的面积由于干旱的加重也在继续缩小;林地、建设用地和未利用地(裸地)等面积不断扩大,建设用地在2009—2017年的土地单一动态度达到22.84%/年,前者的增加主要归因于国家退耕还林政策,后两者的增加则归因于快速城市化。

关键词: 土地利用变化, 干旱, 遥感, 衡邵干旱走廊

Abstract: The Hengshao drought corridor is a typical arid area in the south. The unreasonable land use pattern exacerbates the risk of disaster occurrence. Therefore, the evolution of land use spatial pattern in the Hengshao drought corridor is of great significance for understanding the mechanism of drought. Using the remote sensing image data of the Hengshao drought corridor from 2000 to 2017, and GIS spatial analysis and land use change index model, the spatial distribution characteristics of land utilization of Hengshao drought corridor from 2000 to 2017 was quantitatively analyzed from the perspective of land use change speed and transfer direction, and the evolution law of land use under different drought degrees was analyzed combined with meteorological observation data. The results showed that the agricultural land area was decreasing with the acceleration of urbanization, from 52.63% in 2000 to 38.89% in 2017, mainly distributed in the main urban areas and surrounding counties, and the water area continued to shrink due to the aggravation of drought. Forest land, construction land and unused land (naked land) continued to expand, and the land use dynamics of construction land from 2009 to 2017 reached 22.84% per annum. The increase in the former was mainly attributed to the national policy of returning farmland to forests, and the latter two were attributed to rapid urbanization.

Key words: LUCC, drought, remote sensing, Hengshao drought corridor

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