干旱区研究

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2024 , Vol. 41 >Issue 8: 1385 - 1394

DOI: https://doi.org/10.13866/j.azr.2024.08.12

植物生态

黄河流域上游植被覆盖变化特征及其影响因素

  • 张宏伟 ,
  • 别强 ,
  • 石莹 ,
  • 苏晓杰 ,
  • 李欣璋
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  • 1.兰州交通大学测绘与地理信息学院，甘肃 兰州 730070
    2.地理国情监测技术应用国家地方联合工究中心，甘肃 兰州 730070
    3.甘肃省地理国情监测实验室，甘肃 兰州 730070
张宏伟（2001-），男，硕士研究生，主要从事生态遥感研究. E-mail: 11230867@stu.lzjtu.edu.cn
别强. E-mail: bieq@qq.com

收稿日期: 2023-11-10

  修回日期: 2024-06-07

  网络出版日期: 2024-08-22

基金资助

国家自然科学基金青年科学基金项目(42101096);甘肃省青年科技基金(21JR7RA341)

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Characteristics of vegetation cover changes in the upper reaches of the Yellow River Basin and the influencing factors

  • ZHANG Hongwei ,
  • BIE Qiang ,
  • SHI Ying ,
  • SU Xiaojie ,
  • LI Xinzhang
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  • 1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China
    2. National and Local Joint Engineering Research Center of Geographical Monitoring Technology Application, Lanzhou 730070, Gansu, China
    3. Gansu Engineering Laboratory of Geographical Conditions Monitoring, Lanzhou 730070, Gansu, China

Received date: 2023-11-10

  Revised date: 2024-06-07

  Online published: 2024-08-22

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摘要

植被覆盖度能很好的反映流域生态状况，遥感技术为大规模、高效、精准地监测植被覆盖变化提供了重要手段。本文分析了2001—2020年黄河流域上游植被覆盖度时空变化特征，利用Hurst指数与Cv系数检验其持续性、稳定性，分析气候、地形和人口对植被覆盖度变化的影响。结果表明：（1） 植被覆盖度由东北向西南递增，69.25%区域呈增长趋势。稳定区域面积占总面积的73.79%，强持续性区域面积占比为66.49%。（2） 植被覆盖度与降水正相关区域占比75.63%，与气温正相关区域占比39.28%。（3） 植被覆盖度随着高程的增加先升高后下降，与坡度呈正相关，与坡向关系不显著。（4） 植被覆盖度在人口密度为65~85人·km-2与GDP为27000~37000元·km-2时最高，人类活动对黄河流域上游植被覆盖变化呈现促进作用。研究结果为黄河流域上游生态高质量发展提供科学参考。

关键词： 植被覆盖度; 时序变化; 影响因素; 黄河流域上游

本文引用格式

张宏伟 , 别强 , 石莹 , 苏晓杰 , 李欣璋 . 黄河流域上游植被覆盖变化特征及其影响因素[J]. 干旱区研究, 2024 , 41(8) : 1385 -1394 . DOI: 10.13866/j.azr.2024.08.12

Abstract

Vegetation coverage provides a good reflection of the ecological status of the watershed, and remote sensing technology is important for the large-scale, efficient, and accurate monitoring of changes in vegetation coverage. This study examined the temporal and spatial variation characteristics of vegetation coverage in the upper reaches of the Yellow River Basin from 2001 to 2020, using the Hurst index and Cv coefficient to test persistence and stability. The effects of climate, topography, and population on changes in vegetation coverage were analyzed. The results showed that the vegetation coverage increased from northeast to southwest, with an increasing trend in 69.25% of the areas. Stable areas accounted for 73.79% of the total area, and areas of strong sustainability accounted for 66.49%. (2) Of the total area, 75.63% was positively correlated with precipitation and 39.28% was positively correlated with temperature. (3) As elevation increased, vegetation coverage first increased and then decreased; coverage was positively correlated with slope but not significantly related to aspect. (4) The vegetation coverage was highest when the population density was 65-85 individuals·km-2 and the GDP was 27000-37000 yuan·km-2, indicating that human activities promoted changes in the vegetation cover in the upper reaches of the Yellow River Basin. The results of this study provide a scientific reference to support the high-quality ecological development of the upper reaches of the Yellow River Basin.

Key words： fractional vegetation cover; temporal change; influencing factors; upper Yellow River Basin

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