人民黄河2025，Vol.47Issue(5)：28-33,6.DOI:10.3969/j.issn.1000-1379.2025.05.005
1974-2020年黄河下游游荡段洪水水沙异步特性研究
Research on the Flow and Sediment Asynchronous Characteristics of Floods in the Wandering Reach of the Lower Yellow River from 1974 to 2020
摘要
Abstract
In recent years,there has been an increase in extreme rainfall events,and flood risk remains the biggest threat to the Lower Yellow River.Therefore,it is of great significance to study the changes in the flood characteristics of the Lower Yellow River for flood disaster prevention and reduction.This study analyzed variations in flood peak flow and sediment concentration during different periods by using meas-ured flow and sediment data from the Huayuankou Hydrological Station from 1974 to 2020.The dynamic time warping algorithm was employed to calculate asynchronous duration in the wandering reach of the Lower Yellow River,with the changes in hydro-sedimentary asynchronous characteristics and their influencing factors investigated.The research results show that the floods in the braided reach of the Lower Yellow River are mainly of medium size.After the operation of the Xiaolangdi Reservoir,the proportion of low sediment concentration flood events reaches to 85.9%.The average peak-shape coefficient decreases to 1.33,and the main type of flood asynchrony has been changed from the synchronous type of flood peak and sediment peak to the lagging type of sediment peak.The relationship between the lag duration of sediment peak lagged-type floods and influencing factors were analyzed,such as incoming sediment coefficient,duration and sediment type coefficient.A formula for calculating lag duration was established,with computed values generally aligning well with measured values.关键词
洪水/异步特性/滞后时长/游荡段/黄河下游Key words
flood/asynchronous characteristics/hysteresis time/wandering reach/Lower Yellow River分类
水利科学引用本文复制引用
肖宝康,李洁,陈栋,黄丹丹,李怡杰..1974-2020年黄河下游游荡段洪水水沙异步特性研究[J].人民黄河,2025,47(5):28-33,6.基金项目
国家自然科学基金资助项目(52109102) （52109102）
水资源工程与调度全国重点实验室开放基金项目(2020HLG01) （2020HLG01）
扬州大学青蓝工程项目 （）
