摘要
基于黄河小北干流河段2000-2020年汛后遥感影像、实测断面资料和上游水沙数据,选取主流线摆动宽度、弯曲系数、汊道系数及心滩占比等为表征参数,分析了该河段的河势演变特征及主要影响因素。结果表明:主流线摆动宽度逐渐趋于稳定,多年均值为451 m,呈现上段变化强烈、中段和下段较稳定的特征;弯曲系数多年在1.0~1.3之间,依旧呈现游荡性特征;汊道系数与心滩占比多年变化剧烈,心滩散乱且变化剧烈;上游来水量对河势变化有显著影响,弯曲系数和汊道系数与来水量和多年均值差值呈负相关关系;控导工程和天然节点共同作用,会束窄河道、归顺主流,从而影响河势变化。
Based on post-flood remote sensing images,measured cross-section data,and upstream water-sediment data from the Xiaobeiganliu reach of the Yellow River from 2000 to 2020,several characteristic parameters,including the swing width of the main channel,sinuosity coefficient,braiding coefficient,and central bar area ratio,were selected to analyze the evolution characteristics of the river regime in this reach and its main influencing factors.The results show that the swing width of the main channel gradually stabilized,with a multi-year average of 451 m,exhibiting strong variability in the upper section and relative stability in the middle and lower sections.The sinuosity coefficient ranged between 1.0 and 1.3 over the years,still reflecting the wandering nature of the channel.The braiding coefficient and central bar area ratio fluctuated markedly over time,with central bars being scattered and highly dynamic.Upstream inflow volume had a significant influence on river regime changes:both the sinuosity coefficient and braiding coefficient showed negative correlations with the inflow volume and its deviation from the multi-year average.Training works and natural control points worked together to narrow the channel,regularize the main flow,and thereby affect the river regime evolution.
作者
马素娟
陶建峰
张敏
Ma Sujuan;Tao Jianfeng;Zhang Min(College of Harbor,Coastal and Offshore Engineering,Hohai University;Yellow River Institute of Hydraulic Research,YRCC)
出处
《水利水电科技进展》
北大核心
2026年第1期17-23,共7页
Advances in Science and Technology of Water Resources
基金
国家自然科学基金项目(52071129,U2243220)。
关键词
河势演变
来水来沙条件
控导工程
黄河
小北干流
river regime evolution
incoming flow and sediment regime
flow regulation structures
the Yellow River
the Xiaobeiganliu reach
