河床冲淤演变的洪水绳套曲线规律研究  

Processes of flood noose curve based on riverbed scour and deposition

作　　者：马子普 乐茂华[1,2] 许琳娟[3] MA Zi-pu;LE Mao-hua;XU Lin-juan(China Institute of Water Resources and Hydropower Research,Beijing 100048,China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,Beijing 100048,China;Yellotv River Institute of Hydraulic Research,YRCC,Zhengzhou 450003,China)

机构地区：[1]中国水利水电科学研究院,北京100048 [2]流域水循环模拟与调控国家重点实验室,北京100048 [3]黄河水利委员会黄河水利科学研究院,河南郑州450003

出　　处：《泥沙研究》2020年第5期1-6,共6页Journal of Sediment Research

基　　金：国家重点研发计划项目(2017YFC0405305);财政部三峡工程泥沙重大问题项目(12610100000018J129-5)。

摘　　要：在不考虑河床冲淤的洪水水位流量关系式的基础上,通过引入冲刷系数及淤积系数,将发生冲淤时的洪水水位流量关系调整为水深流量关系,分别得到了涨水冲刷、落水淤积及涨水淤积时的水深流量关系式。结果表明,涨水冲刷、落水淤积只会削弱曲线的胖瘦,涨水淤积时既会改变绳套曲线的方向,也会影响曲线的胖瘦。河床朝淤积方向发展时,绳套曲线为逆时针方向;河床朝冲刷方向发展时,绳套曲线为顺时针方向。冲刷系数及淤积系数越接近1,绳套曲线越瘦。据此,可由实测的绳套曲线对河床的冲淤演变作出定性的判断。Based on the traditional flood stage-discharge formula without considering riverbed scour and deposition,the stage-discharge formula is adjusted to flood depth-discharge formula by introducing coefficients of scour and deposition,then the depth-discharge formulae of scour during flood rising,deposition in flood fall and deposition during flood rise are all introduced.The formulae show that scour in flood rising and deposition in flood falling will only weaken the width extent of the curve.However,deposition in flood rise will change the direction of the rope curve and affect the width extent of the curve.When the riverbed develops toward deposition,the flood curve rope is counterclockwise.Riverbed develops toward scour,the flood curve rope is clockwise.The closer the scour coefficient and the deposition coefficient to 1,the thinner the flood curve is.Accordingly,a qualitative riverbed process could be expressed by the noose curve.

关 键 词：洪水绳套曲线 河床冲淤 涨水冲刷 落水淤积 涨水淤积 

分 类 号：TV147.3[水利工程—水力学及河流动力学]