基于水沙关系系数法确定黄河下游造床流量  

Determination of dominant discharge of the lower Yellow River based on coefficient frequencies of flow-sediment relationship

作　　者：孙东坡[1] 王勤香[2] 王鹏涛[1] 张晓雷[1] 

机构地区：[1]华北水利水电学院,郑州450011 [2]黄河水利职业技术学院,开封475001

出　　处：《水力发电学报》2013年第1期150-155,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金项目(51079055);华北水利水电学院水利水运及治河重点实验室资助(NCWU-2010-06)

摘　　要：在分析评价已有造床流量确定方法的基础上,指出了平滩流量法、输沙率法、输沙能力法、水沙综合频率法四种常见方法在计算黄河下游造床流量中的不足。引入水沙关系系数频率,提出了一种适用于黄河下游水沙变异特点的造床流量确定方法。采用新方法与传统四种方法对黄河下游造床流量进行了计算分析比较,结果表明在一般情况各方法均较接近;而在水沙变异期,水沙关系系数频率法显示出能正确反映造床特性、合理确定造床流量的特点,充分体现了中常流量在造床作用中的重要性。经比较认为,水沙关系系数频率法更具适用性与合理性,能为黄河下游河道管理提供科学的技术参数。For calculation of dominant discharge, four traditional methods are available, bank-full discharge, sediment bed load rate, sediment transport capacity, the frequencies of discharge and sediment concentration. All these methods, however, have shortages in calculation of the Yellow River, which has been shown by an analysis and evaluation of the previous calculations of the dominant discharges in this work. This paper presents a new method based on the coefficient frequencies of flow-sediment relationship. A comparison with the traditional methods reveals that for normal flow period, all the results are quite close to each other, but for the period of flow-sediment variations, only our new method shows good agreement of its dominant discharge calculations with the actual values. This means that medium discharge plays a crucial role in river bed formation. Thus, the method of coefficient frequencies of flow-sediment relationship would provide a valuable technique for study and management of the lower Yellow.

关 键 词：水沙动力学 河床演变 造床流量 水沙关系系数频率 黄河下游 

分 类 号：TV85[水利工程—水利水电工程]