水科学进展2025，Vol.36Issue(3)：505-515,11.DOI:10.14042/j.cnki.32.1309.2025.03.013
冲积河流平滩流量滞后响应前期影响权重优化
Optimum impact weights of previous conditions for delayed response of bank-full discharge in alluvial rivers
摘要
Abstract
How to determine the impact weights of the previous water and sediment conditions for the delayed response of bank-full discharge in alluvial river is a difficult question.Considering the complex variation in impact weights of previous water and sediment conditions,an improved convolution model for the previous water and sediment conditions and their impact weights is established for bank-full discharge,and a simple correlation analysis method for determining and optimizing the impact weights of previous water and sediment conditions is proposed.The former bank-full discharge delayed response model using moving average and rate equation methods are both unique impact weight cases of convolution model.Taking the Sanhuhekou station located in the Inner Mongolia reach of Yellow River as a case study,the variation of bank-full discharge is simulated using different modes.The results indicate that the order of model effect from high to low is convolution model,moving average method,and rate equation method,the deterministic coefficients are 0.906,0.903,and 0.879 respectively;the Nash-Sutcliffe efficiency coefficients are 0.906,0.899,and 0.874 respectively,caused by different impact weights of previous water and sediment conditions.So the model performance can be improved by selecting the impact weights of previous water and sediment conditions reliably.Analysis of the optimum impact weights of previous water and sediment conditions shows that,the bank-full discharge is influenced by the water and sediment conditions of current year and preceding 6-8 years,with a dual effect.关键词
平滩流量/滞后响应/卷积模型/前期影响权重/优化Key words
bank-full discharge/delayed response/convolution model/impact weights of previous conditions/optimum分类
建筑与水利引用本文复制引用
申红彬,张小峰,王海周,陈翠霞,陈建..冲积河流平滩流量滞后响应前期影响权重优化[J].水科学进展,2025,36(3):505-515,11.基金项目
国家重点研发计划项目(2023YFC3208603) （2023YFC3208603）
水利部黄河流域水治理与水安全重点实验室(筹)研究基金项目(2023-SYSJJ-08) The study is financially supported by the National Key R&D Program of China(No.2023YFC3208603)and the Research Fund of Key Laboratory of Water Management and Water Security for Yellow River Basin,Ministry of Water Resources(under construction)of China(NO.2023-SYSJJ-08). （筹）
