Analysis of erosion and sedimentation in the Sanmenxia Reservoir and Tongguan elevation change in recent years
In response to the problems of the Sanmenxia reservoir and the Tongguan elevation under the abundant water conditions since 2018,the statistical analysis method is used to analyze the sediment discharge of the Sanmenxia reservoir,the erosion and sedimentation processes in the reservoir area and the change of Tongguan elevation in the past five years.The results show that the net sediment discharge in the reservoir area is determined by duration of the full open discharge of the Sanmenxia reservoir.The erosion and sedimentation in the section below Beicun change drastically in the flood season due to the open discharge of the reservoir,and it plays a decisive role in the erosion and sedimentation in the reservoir area during the flood season and even throughout the whole year,while the decrease of the Tongguan elevation in the flood season is more related to the runoff and flood peak in the Weihe River.A comprehensive relationship formula between the change of the Tongguan elevation in the flood season and the runoff parameters at Huaxian and the riverbed condition parameters is proposed furthermore,which can better explain the reasons for the change of the Tongguan elevation in recent years.
Sanmenxia Reserviorerosion and sedimentation evolutionungated sediment dischargeTongguan Elevationrunoff parameters
万方数据
维普
