Effects of Multi-time Scale Meteorological Drought on Vegetation in the Yellow River Basin from 1982 to 2020

LI Yangyang; DONG Guotao; XUE Huazhu; ZHENG Yanchao; LIAN Yaokang

doi:10.13870/j.cnki.stbcxb.2024.01.007

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Effects of Multi-time Scale Meteorological Drought on Vegetation in the Yellow River Basin from 1982 to 2020

更新时间：2025-03-12

- Effects of Multi-time Scale Meteorological Drought on Vegetation in the Yellow River Basin from 1982 to 2020
- Vol. 38, Issue 1, Pages: 187-196(2024)
- 作者机构：
  
  1. 河南理工大学测绘与国土信息工程学院,河南,焦作,454000
  2. 黄河水利委员会黄河水利科学研究院,郑州,450003
  3. 黑河水资源与生态保护研究中心,兰州,730030
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2024.01.007
  CLC： Q948.1
- Published：2024
- 稿件说明：
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LI Yangyang, DONG Guotao, XUE Huazhu, et al. Effects of Multi-time Scale Meteorological Drought on Vegetation in the Yellow River Basin from 1982 to 2020[J]. 2024, 38(1): 187-196.
DOI：

LI Yangyang, DONG Guotao, XUE Huazhu, et al. Effects of Multi-time Scale Meteorological Drought on Vegetation in the Yellow River Basin from 1982 to 2020[J]. 2024, 38(1): 187-196. DOI： 10.13870/j.cnki.stbcxb.2024.01.007.

摘要

[目的] 深入研究黄河流域不同时间尺度的气象干旱对植被的时空响应特征

为生态保护、水资源管理和气候变化适应性提供宝贵信息

能够减轻干旱引发的环境和经济问题。[方法] 基于黄河流域1982—2020年的标准化降水蒸散指数SPEI和归一化植被指数NDVI

采用逐像元线性回归模型、Sen’s趋势分析和Mann-Kendall检验等方法研究黄河流域不同时间尺度气象干旱的时空分布特征及其对植被影响。[结果] (1)1982—2020年黄河流域呈不显著的变干趋势

不同时间尺度SPEI变化趋势为负值的区域主要集中在黄河流域的西部龙羊峡至兰州区域、黄河流域的南部及河套平原周围区域。(2)黄河流域多年平均植被覆盖度的空间分布特征呈南高北低、由东南向西北递减的趋势

研究区内植被覆盖度呈显著增加的区域(61.94%)大于植被覆盖度呈显著减少的区域(5.43%)。(3)黄河流域大部分地区干旱状况与植被状态呈正相关

流域内呈显著正相关区域主要集中在黄河流域西北部和最北端区域

说明这些区域的植被受干旱的影响最为严重。(4)草地和耕地对6个月时间尺度的干旱响应最强

林地和未利用地较其他土地类型更易受长期干旱影响。4种地貌类型都容易受到中长期缺水的影响

其中丘陵地区的植被最易受干旱影响。[结论] 研究结果为黄河流域防灾减灾及生态环境建设提供有效的科学依据

为黄河流域的生态保护、水资源管理和气候变化适应性提供重要的信息

有助于制定更加精准的政策和措施

以减轻干旱对环境和经济带来的潜在影响

促进可持续发展。

Abstract

[Objective] Intensive research on the spatial and temporal response characteristics of meteorological drought to vegetation at different time scales in the Yellow River Basin provides valuable information for ecological conservation

water resource management

and climate change adaptation

and can mitigate the environmental and economic problems caused by drought. [Methods] Based on the standardized precipitation evapotranspiration index (SPEI) and normalized vegetation index (NDVI) for the Yellow River Basin during the period of 1982—2020

image-by-image metric linear regression models

Sen’s trend analysis and Mann-Kendall test were used to study the spatial and temporal distribution characteristics of meteorological droughts at different time scales in the Yellow River Basin

as well as their impacts on vegetation. [Results] (1) From 1982 to 2020

the Yellow River Basin showed an insignificant increasing trend in aridity

with regions exhibiting negative trends in SPEI mainly concentrated in the western region from Longyangxia to Lanzhou

the southern part of the Yellow River Basin

and the surrounding areas of the Hetao Plain. (2) The spatial distribution pattern of average vegetation coverage in the Yellow River Basin demonstrated a decreasing trend from south to north and from southeast to northwest. The proportion of regions with a significant increase in vegetation coverage (61.94%) was greater than that of those with a significant decrease (5.43%). (3) In most areas of the Yellow River Basin

drought conditions were positively correlated with vegetation status. Regions exhibiting significant positive correlations were mainly concentrated in the northwest and northernmost areas of the Yellow River Basin

indicating that vegetation in these areas was severely affected by drought. (4) Grassland and cultivated land showed the strongest response to drought at a six-month time scale

while forests and unused land were more vulnerable to long-term drought compared to other land types. All four landform types were susceptible to medium- to long-term water shortages

with vegetation in hilly areas being the most affected by drought. [Conclusion] The results of the study provide an effective scientific basis for disaster prevention and mitigation as well as ecological environment construction in the Yellow River Basin

and provide important information for ecological protection

water resource management and climate change adaptation in the Yellow River Basin

which will help to formulate more precise policies and measures to mitigate the potential impacts of drought on the environment and the economy

and to promote sustainable development.

关键词

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