泥沙研究2025，Vol.50Issue(3)：30-36,24,8.DOI:10.16239/j.cnki.0468-155x.2025.03.005
利津水位变化过程模拟及影响因素分析
Simulation of water level temporal variations at Lijin and analysis of influencing factors
摘要
Abstract
The water level of Lijin at the discharge of 3000m3/s is often taken as the erosion base level at the Lower Yellow River,the variation of the water level has an influence on the erosion and deposition of the Lower Yellow River.However,the rise and fall of the water level at Lijin is not only affected by incoming water and sediment,but also is related to the length of the tail channel.From the perspective of stream power,the de-layed response calculation method has been proposed,by which the continuous variation process of water level at Lijin from 1955 to 2019 is well simulated and the underlying influence mechanism of different factors on the rise and fall of Lijin water level has been revealed.The study also shows that after 2000,there is a significant positive linear relationship between the water level at Lijin and the previous 5-year moving average incoming sediment coefficient,with determination coefficient over 0.88.After the operation of Xiaolangdi Reservoir,the tail channel length extended continuously,whereas the water volume inflow increases over time,and the sedi-ment load decreases significantly and maintains at a low value,which leading to continuous erosion in the Lijin section,and the decrease in Lijin water level consequently.关键词
利津水位/水流功率/来沙系数/尾闾河长Key words
water level at Lijin/stream power/incoming sediment coefficient/tail channel length分类
建筑与水利引用本文复制引用
沈逸,马子普,张原锋,李洁..利津水位变化过程模拟及影响因素分析[J].泥沙研究,2025,50(3):30-36,24,8.基金项目
国家自然科学基金项目(U2243218) （U2243218）
