水科学进展2025，Vol.36Issue(3)：425-435,11.DOI:10.14042/j.cnki.32.1309.2025.03.006
雅鲁藏布江中游梯级水库运行的水文效应
Hydrological effects of the cascade reservoir in the Middle Yarlung Zangbo River
摘要
Abstract
High-altitude regions,with their unique climatic and geographical conditions,render the Yarlung Zangbo River basin an ideal natural laboratory for investigating river system responses to global climate change and anthropogenic activities.Focusing on the Zangmu-Jiacha cascade reservoirs in the middle reaches,we analyzed observed hydrological and water temperature data from 2000-2022 to dissect downstream impacts.Using the upstream Yangcun station as a reference and defining pre-and post-dam periods by reservoir commissioning,we systematically examined alterations in temporal dynamics,intra-annual distribution patterns,and hydro-thermal relationships.Our results reveal that following Zangmu Dam operation,annual,flood-season,and non-flood-season discharge,along with annual minimum flows,increased downstream at Nuxia station,while annual maximum flows slightly decreased.Concurrently,annual and flood-season thermal flux increased downstream,while the annual water temperature range converged towards upstream reference conditions-a phenomenon amplified after the subsequent Jiacha Dam operation.Intriguingly,reservoir operations induced contrasting seasonal patterns:the downstream intra-annual flow distribution flattened(reduced seasonality)relative to upstream,whereas the water temperature distribution became more peaked,exhibiting increased upstream-downstream synchronization characterized by amplified warming during rising temperature periods and intensified cooling during falling temperature periods.Increased discharge during November to May was primarily linked to reservoir regulation,whereas increases from June to October reflected combined influences of regulation and augmented glacier meltwater contributions.Furthermore,the development of the cascade intensified both the asynchrony in flow-water temperature correlations and the time lag in hydro-thermal relationships between upstream and downstream sites.关键词
水文情势/水温特性/梯级水库/时间尺度/雅鲁藏布江Key words
hydrological regime/water temperature regime/cascade reservoir/time scale/Yarlung Zangbo River分类
天文与地球科学引用本文复制引用
虞美秀,金君良,张建云,陈娟,陈求稳,何佳仪..雅鲁藏布江中游梯级水库运行的水文效应[J].水科学进展,2025,36(3):425-435,11.基金项目
国家重点研发计划项目(2022YFC3203902) （2022YFC3203902）
国家自然科学基金项目(52121006) The study is financially supported by the National Key R&D Program of China(No.2022YFC3203902)and the National Natural Science Foundation of China(No.52121006). （52121006）
