1989—2019年库布齐沙漠植被覆盖度的时空变化
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

Q948

基金项目:

国家重点研发专项“不同气候区固沙新材料研发、筛选与施配技术及效果研究”(2018YFC0507101)


Temporal and Spatial Variation of Vegetation Coverage in Kubuqi Desert from 1989 to 2019
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    [目的] 探究库布齐沙漠近1989—2019年植被覆盖度的时空动态变化规律,为库布齐沙漠植被恢复及生态建设提供理论参考和基础数据。[方法] 以1989—2019年每5 a为1期(共7期)的Landsat影像为数据源,结合归一化植被指数(NDVI)像元二分法模型,利用ENVI 5.3和ArcGIS 10.2分析库布齐沙漠1989—2019年植被覆盖度(FVC)时空动态变化特征。[结果] ①在时间变化上,近30 a间库布齐沙漠植被覆盖度整体呈增长趋势,平均植被覆盖度由0.104增长到0.243。在空间分布上,库布齐沙漠植被覆盖度呈现由西向东、向北增加的特征。②库布齐沙漠植被覆盖在1999—2004年和2009—2014年均呈现退化趋势,平均植被覆盖度分别减少0.053和0.054,退化面积分别为3 870.22和6 093.59 km2,退化程度均以植被覆盖度减少10%~30%为主。[结论] 1989—2019年库布齐沙漠植被覆盖度总体有所改善,未来该区生态修复重点关注低植被覆盖区域。

    Abstract:

    [Objective] The temporal and spatial variation of vegetation coverage in the Kubuqi Desert during 1989—2019 was explored in order to provide the necessary theoretical basis and support for ecological restoration of the local area. [Methods] Landsat images acquired every five years from 1989 to 2019 was used, combined with the normalized difference vegetation index (NDVI) model, ENVI 5.3, and ArcGIS 10.2 to analyze the fractional vegetation coverage (FVC) variation of the Kubuqi Desert during 1989—2019. [Results] ① In terms of temporal variation, the average fractional vegetation coverage of the Kubuqi Desert increased from 0.104 to 0.243 during 1989—2019. In terms of spatial distribution, fractional vegetation coverage increased from west to east and north in the Kubuqi Desert. ② The fractional vegetation coverage of the Kubuqi Desert declined during 1999—2004 and 2009—2014. The average fractional vegetation coverage for those two periods decreased by 0.053 and 0.054, respectively, and the degraded areas were 3 870.22 km2 and 6 093.59 km2, respectively. [Conclusion] On the whole, the vegetation coverage of the Kubuqi Desert increased during 1989—2019. In the future, local ecological restoration efforts should focus on the low vegetation coverage areas.

    参考文献
    相似文献
    引证文献
引用本文

吴小燕,高永,党晓宏,张超,杜斌,张海龙,包晓英.1989—2019年库布齐沙漠植被覆盖度的时空变化[J].水土保持通报,2022,42(2):300-306

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-08-17
  • 最后修改日期:2021-11-10
  • 录用日期:
  • 在线发布日期: 2022-05-26
  • 出版日期: