Study on Regularity of Sediment Transport During Hyper-Concentrated Flood Periods in the Wandering Section of the Lower Yellow River
The river bed in the lower reaches of the Yellow River has been in a state of siltation and uplift for a long time,and the evolution law of erosion and deposition has an important influence to the treatment of the lower reaches.Therefore,it is necessary to quickly predict the erosion and deposition amount of different levels of high sediment content flood and judge the impact of wandering channels on the lower Yellow River during high sediment content flood period.Based on the measured water and sediment data of 54 floods with high sediment con-tent from 1960 to 2021,the correlation between the sediment transport rate of the lower Yellow River and the discharge,sediment content and sediment transport rate of the upper Yellow River was analyzed,and the correlation formula was established to systematically study the sedi-ment transport law of high sediment content flood.The results show that there is a very high correlation between the sediment transport rate of the lower station and the sediment transport rate of the upper station.The sediment transport rate formula of the flood period with high sedi-ment content can be obtained according to the classification of the sediment arrival coefficient,which can simulate the erosion and deposition process well and greatly improve the accuracy of the measured water and sediment data.Taking Xiaolangdi Hydrographic Station as the inlet control hydrographic station of the lower Yellow River,the sediment transport rates of Huayuankou Station,Jiahetan Station and Gaocun Sta-tion can be calculated by using the sediment transport rate relation formula,which is obtained by the classification of sediment intake coeffi-cient,so as to calculate the cumulative erosion and deposition of Xiaolangdi-Huayuankou,Huayuankou-Jiahetan and Jiahetan-Gaocun reach.
sediment transport ratesincoming sediment coefficientdeposition and erosion in channelhyperconcentrated floodLower Yellow River
万方数据
维普
