基于能量平衡的黄河下游平滩流量计算方法

Bankfull Discharge Calculation Method Based on the Energy Balance in the Lower Yellow River

根据能量平衡原理建立了平滩流量计算方法,并利用黄河下游5个主要测站的实测水沙及平滩流量资料进行了检验。结果表明:建立的平滩流量计算方法能较好地反映平滩流量随水流含沙量及来水量的变化趋势,计算值与实测值较为符合;来水量在一定范围内时,水流含沙量越大,平滩流量越小;水流含沙量在一定范围内时,来水量越大,则平滩流量越大。

Based on the energy balance principle, a bankfull discharge calculation method was established in this paper, and tested with measured flow discharge, sediment load and bankfull discharge data of 5 major hydrological stations in the lower Yellow River. The results show that the calculated values agree with the measured data very well, and the calculation method can describe the bankfull discharge adjustment trends with the variations of flow sediment concentration and river runoff. It implies that the bankfull discharge decrease with the increasing of flow sediment concentration when the river runoff is determined, and increases with the increasing of river runoff when the flow sediment concentration is determined.