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

Wu Xiaoyan; Gao Yong; Dang Xiaohong; Zhang Chao; Du Bin; Zhang Hailong; Bao Xiaoying

doi:10.13961/j.cnki.stbctb.2022.02.040

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

- Temporal and Spatial Variation of Vegetation Coverage in Kubuqi Desert from 1989 to 2019
- Bulletin of Soiland Water Conservation Vol. 42, Issue 2, Pages: 300-306(2022)
- 作者机构：
  
  1. 内蒙古农业大学沙漠治理学院,内蒙古,呼和浩特,010018
  2. 内蒙古自治区航空遥感测绘院,内蒙古,呼和浩特,010018
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.02.040
  CLC： Q948
- Published：2022
- 稿件说明：
移动端阅览
Wu Xiaoyan, Gao Yong, Dang Xiaohong, et al. Temporal and Spatial Variation of Vegetation Coverage in Kubuqi Desert from 1989 to 2019[J]. Bulletin of Soiland Water Conservation, 2022, 42(2): 300-306.
DOI：

Wu Xiaoyan, Gao Yong, Dang Xiaohong, et al. Temporal and Spatial Variation of Vegetation Coverage in Kubuqi Desert from 1989 to 2019[J]. Bulletin of Soiland Water Conservation, 2022, 42(2): 300-306. DOI： 10.13961/j.cnki.stbctb.2022.02.040.

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 km

，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.

关键词

Keywords

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