摘要
长江流域作为我国重要的水资源战略地之一,其地表水体面积变化直接影响区域供水稳定与用水保障,进而影响到区域水资源安全。文章基于Landsat系列遥感影像,提取并统计长江流域及各子流域1987—2024年水体面积,分别分析年际与年内时空变化规律。结果表明,从年尺度看,上游水体面积增加主导了整个流域水体面积增长,而中下游湖泊水体面积萎缩严重。从月尺度看,2000年后相较于2000年前水体面积的季节变化规律发生明显变化,季节性波动幅度减小,大部分子流域月平均水体面积增大,沿长江中下游干流分布的区域出现相反的趋势。因此,需要针对不同区域进行长期监测,加强水资源的多元化调度与管理。本研究结果可为长江流域制定合理的区域水资源管理策略提供一定的参考。
As one of the important water resource strategic areas in China,the surface water area changes in the Yangtze River Basin directly affect regional water supply stability and water security,thereby affecting regional water resource security.Based on Landsat series remote sensing images,this article extracts and statistically analyzes the water surface area of the Yangtze River Basin and its sub basins from 1987 to 2024,and explores the spatiotemporal and intra annual variation patterns.The results indicate that,on an annual scale,the increase in upstream water area dominates the growth of the entire watershed water area,while the shrinkage of water area in the middle and lower reaches is severe.From a monthly perspective,the seasonal variation pattern of water body area has undergone significant changes since 2000 compared to before 2000.The amplitude of seasonal fluctuations has decreased,and the average monthly water body area in most sub basins has increased.The regions distributed along the middle and lower reaches of the Yangtze River have shown the opposite trend.Therefore,it is necessary to conduct long-term monitoring for different regions and strengthen the diversified scheduling and management of water resources.The results of this study can provide some reference for formulating reasonable regional water resources management strategies in the Yangtze River Basin.
作者
赵云轩
杜际增
郭超
肖乐玲
王青
刘泓汐
ZHAO Yunxuan;DU Jizeng;GUO Chao;XIAO Leling;WANG Qing;LIU Hongxi(Advanced Institute of Natural Sciences,Beijing Normal University,Zhuhai 519087,Guangdong,China;State Key Laboratory of Water Environmental Simulation,School of Environment,Beijing Normal University,Beijing 100875,China;River Research Department,Changjiang River Scientific Research Institute of Changjiang Water Resources Commission,Wuhan 430010,Hubei,China)
出处
《水利发展研究》
2026年第2期61-70,100,共11页
Water Resources Development Research
基金
国家重点研发计划资助项目(2022YFC3202001)。
关键词
遥感
地表水体面积
时空变化
趋势分析
长江流域
remote sensing
surface water area
spatiotemporal variation
trend analysis
Yangtze River Basin
