广东水利水电Issue(11)：54-61,8.
悬移质溯源冲刷计算公式
Calculation Formula for Retrogressive Erosion on Suspended Load
摘要
Abstract
Retrogressive erosion is not only an important part of the calculation of reservoir erosion and deposition,but also an important research content in morphodynamic models of sediment-laden reservoirs.Based on the retrogressive erosion data of Sanmenxia reservoir from 1974 to 2010 and Xiaolangdi reservoir model,it is determined that the flow rate and water surface slope are key factors to influence retrogressive erosion.On this basis,four types of formula structures are summarized and classified by combined with existing formulas for retrogressive erosion,and the four types of formulas are calibrated and verified by 88 groups of two parts.The results indicate that:(i)there is a good positive correlation between the sediment transport rate of outlet and flow rate,water surface slope,inflow sediment concentration,inflow sediment transport rate;(ii)for the calculation formula of sediment transport rate,the formula which takes into account the sediment factor has higher accuracy;(iii)When the sediment transport rate of outlet is less than 500t/s,the accuracy of the retrogressive erosion calculation is higher by using the formula Qso=0.001Q1.484out J0.958+0.592Qsin,while the sediment transport rate is greater than 500t/s,the formula Qso=0.0026Q1.245out J0.499S0.379in is more accurate.关键词
溯源冲刷/悬移质/输沙率/三门峡水库/小浪底水库Key words
retrogressive erosion/suspended load/sediment transport rate/Sanmenxia Reservoir/Xiaolangdi Reservoir分类
水利科学引用本文复制引用
余铖峥,黄东,陈鑫池,冯雪..悬移质溯源冲刷计算公式[J].广东水利水电,2025,(11):54-61,8.基金项目
广东省水利科技创新项目(编号:2023-06、2024-06) （编号:2023-06、2024-06）
2023年广东省科技创新战略专项资金科研项目(编号:sky2023-05). （编号:sky2023-05）
