水土保持研究2026，Vol.33Issue(2)：50-57,8.DOI:10.13869/j.cnki.rswc.2026.02.038
长江流域植被变化影响因素与水沙关系研究
Study on influencing factors of vegetation change and water-sediment relationship in Yangtze River Basin
摘要
Abstract
[Objective]This study systematically investigates the spatiotemporal characteristics of vegetation change in the Yangtze River Basin,its main driving factors,and the coupling relationship with water-sediment processes,providing a scientific basis for ecological protection and resource management in the river basin.[Methods]Based on normalized difference vegetation index(NDVI),meteorological data,and water-sediment data in the Yangtze River Basin from 2001 to 2020,trend analysis,correlation analysis,and residual analysis were applied to quantitatively assess the impact of climatic factors and human activities on vegetation evolution.Additionally,the relationships between NDVI,annual sediment load,and annual runoff were analyzed.[Results]The NDVI in the Yangtze River Basin showed an overall fluctuating upward trend,with an average annual growth rate of 0.001 7/a.Among them,the middle and upper reaches demonstrated significant NDVI increases(0.001 7/a and 0.001 9/a,respectively),while a notable decline(-0.000 9/a)was observed in the lower reaches.Temperature had the most significant promoting effect on vegetation growth,while the impact of precipitation and solar radiation exhibited distinct regional differences.Ecological projects such as Grain-for-Green Program significantly improved vegetation cover in the upper and middle reaches,while urban expansion led to vegetation degradation in the lower reaches.Vegetation recovery substantially reduced annual sediment load and increased runoff in the upper and middle reaches,while water-sediment processes in the lower reaches were mainly regulated by reservoirs.[Conclusion]Vegetation changes in the Yangtze River Basin show significant spatiotemporal heterogeneity and are jointly driven by climate change and human activities.Ecological projects have effectively enhanced ecological quality and ecosystem regulatory functions through water-sediment process regulation,which is crucial for sustainable development of the river basin.关键词
植被动态/气候变化/人类活动/水沙变化/长江流域Key words
vegetation dynamics/climate change/human activities/water-sediment variations/Yangtze River Basin分类
农业科技引用本文复制引用
刘新波,刘旭婷,韩剑桥,李雨晨,杨磊,安日辉..长江流域植被变化影响因素与水沙关系研究[J].水土保持研究,2026,33(2):50-57,8.基金项目
中国长江电力股份有限公司"流域水体含沙量动态遥感与输沙量变化趋势分析研究"(合同编号:Z242302046) （合同编号:Z242302046）
