水利学报2025，Vol.56Issue(3)：354-363,10.DOI:10.13243/j.cnki.slxb.20240382
金沙江下游梯级水库运行期设计洪水计算方法研究
Research on design flood estimation method during operation period for cascade reservoirs in the lower Jinsha River
摘要
Abstract
The cascade reservoirs in the lower Jinsha River were selected as case study.Both the time-varying P-Ⅲ curve fitting(Tv-P3/CF)method and the most likely flood regional composition(MLFRC)method were em-ployed to estimate the design flood during the reservoir operation period,considering the regulation effects of up-stream reservoirs in implicit and explicit way,respectively.The design flood hydrographs were amplified by the same frequency method,and the reservoir flood control water levels(FCWLs)were determined.The results indi-cate that:(1)The design floods during operation period calculated by two methods are consistently lower than those during the construction period.The Tv-P3/CF method offers covariate without the need to consider the reser-voir operation and restore flow data series,while the MLFRC method,which performs step-by-step flood routing from upstream to downstream for each reservoir,is much complex in its calculation process but holds practical sig-nificance.(2)The regulation effect of upper reservoirs significantly reduces downstream floods,1,000-year design flood peak,3-day,7-day,and 15-day flood volumes estimated by the Tv-P3/CF(MLFRC)method have reduced about 37.30％(41.65％),35.96％(39.66％),36.82％(35.72％),and 28.03％(26.76％)at the Xiangjiaba Reservoir,respectively.(3)Maintaining the original flood prevention standards unchanged,the FCWLs derived by flood regulating for the Wudongde-Baihetan-Xiluodu-Xiangjiaba cascade reservoirs are 955.6、794.6、572.3 and 373.2 m,respectively.Compared to reservoir operation based on the flood-limited water levels,the operation of cascade reservoirs based on FCWLs can generate 2.76 billion kW·h more power(+2.6％)from June to September annually,which has significant economic benefits.关键词
水库运行期/设计洪水/洪水地区组成/非一致性洪水频率分析/汛限水位/汛控水位/金沙江下游Key words
reservoir operation period/design flood/flood regional composition/non-stationary flood frequency a-nalysis/flood-limited water level/flood control water level/lower Jinsha River分类
建筑与水利引用本文复制引用
谢雨祚,郭生练,钟斯睿,汪肖雅,王俊..金沙江下游梯级水库运行期设计洪水计算方法研究[J].水利学报,2025,56(3):354-363,10.基金项目
国家自然科学基金长江联合基金项目(U2340205) （U2340205）
中国长江电力股份有限公司项目(Z242402005) （Z242402005）
