黄河宁蒙河段枯水流量演算方法研究

Study on Routing Methods of Low Flow of Ning-Meng Section of the Yellow River

基于流量演进的水文学原理,以日为时间步长,分析探讨了线性回归法、马斯京根法和汇流系数法在黄河宁蒙河段枯水流量演算中的应用。结果表明,线性回归法和汇流系数法演算效果较好,能够反映黄河上游宁蒙河段枯水流量演进的基本规律,满足宁蒙河段枯水流量调度工作的需求;马斯京根法受其应用条件的限制,对长距离、小流量河段流量演算的效果较差,不适合宁蒙河段枯水流量演算。

The paper approaches and analyzes the application of linear regression method,Muskingum method and method of confluence coefficient to the calculation of low flow of Ning-Meng section of the Yellow River based on the principle of hydrology of flow routing and taking a day as time step.The outcomes show that the calculation effect of the methods of linear regression and confluence coefficient is better,can reflect the basic law of low flow routing and meet the requirements of low flow regulation of the section and;the effect of Muskingum method is not good for the calculation of long distance and small discharge section due to the limit of application condition,thus,it is not suit to the low flow routing of Ning-Meng section.