3-D numerical simulation of the influences of bank erosion processes on navigation conditions: case study of the Taipingkou Waterway on the middle Yangtze River
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摘要: 长江中游河道岸滩侧蚀现象普遍,易对航道稳定形成不利影响,深入研究岸滩侧蚀冲刷机理及其航道响应过程具有重要意义。建立了考虑相邻土体影响的黏性岸滩侧蚀坍塌力学模式,以长江中游太平口水道为例,基于局部网格可动技术,构建了岸滩侧蚀及其河床冲淤变化的三维水沙动力学模型;在模型验证相似的基础上,分析了清水冲刷条件下腊林洲边滩侧蚀对太平口水道航道格局的影响。研究结果表明:模型可较好地模拟由岸滩侧蚀所引发的河势演变过程;上游来沙减少后,太平口水道河床以及未守护低滩部位将进一步产生冲刷;腊林洲边滩稳定与否,对太平口水道“南槽-北汊”航道格局的稳定具有重要作用。Abstract: Riverbank erosion occurs frequently on the middle Yangtze River, which may result in the instability of the channel navigation. A new riverbank erosion model for the cohesive material was developed by considering the effects of adjacent cohesion. On the basis of 3-D flow and sediment transport model and the mechanisms of riverbank erosion, a 3-D morphological model for the Taipingkou Waterway on the middle Yangtze River was developed by using the adaptive grid system. The 3-D model was calibrated by the observed data, and the simulated results agreed with the measured data. The influences of riverbank erosion processes on the navigation conditions were simulated by the numerical model. The developed model is able to calculate the complex morphological changes due to bank erosion. Bed degradation and bank erosion are enhanced with less sediment load input. Simulated results indicated that the riverbank stability of Lalinzhou is critical for the stability of navigation conditions on the Taipingkou Waterway.
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1. 假冬冬,杨俊,郝由之,陈长英,张幸农,应强. 冻融作用对我国北方季节性冰冻河流岸坡稳定性的影响:以松花江典型河段为例. 湖泊科学. 2023(03): 1072-1081 . 百度学术 2. WANG Jianjun,YANG Yunping,ZHANG Mingjin,ZHU Lingling,LI Shaowu,WEN Yuncheng. Critical threshold of periodic point bar scour and sediment body transport path in tidal reaches: A case study of Fujiangsha reach, Yangtze River. Journal of Geographical Sciences. 2023(06): 1334-1358 . 必应学术 3. 蒋婕妤,鲁瀚友,赵文刚,刘晓群. 近70年来虎渡河水沙变化特征与冲淤演变分析. 泥沙研究. 2023(05): 41-47 . 百度学术 4. 张丽媛,郭连峰,王赟. 软土区黄河故道疏浚工程岸坡稳定性分析. 水利水电快报. 2023(12): 25-30 . 百度学术 5. 杨俊,假冬冬,高骏,郝由之,吴磊. 季冻区河流岸滩崩塌机理及其数值模拟研究进展. 水利水电技术(中英文). 2022(01): 83-90 . 百度学术 6. 林芬芬,夏军强,周美蓉,邓珊珊. 边界条件对荆江监利河段枯水河槽形态调整的影响. 人民长江. 2021(03): 1-8+35 . 百度学术 7. 假冬冬,杨俊,陈长英,张幸农,应强. 中国北方季节性冰冻河流岸滩崩塌数值模拟——以松花江为例. 水科学进展. 2021(05): 717-726 . 本站查看 8. 王建军,杨云平,申霞,应翰海,乔华倩. 长江下游福姜沙河段边心滩演变及对航槽冲淤影响研究. 应用基础与工程科学学报. 2020(04): 751-762 . 百度学术 9. 赵维阳,杨云平,张华庆,张明进,袁晶,杨保岑. 三峡大坝下游近坝段沙质河床形态调整及洲滩联动演变关系. 水科学进展. 2020(06): 862-874 . 本站查看 10. 假冬冬,陈诚,牛晨曦,张幸农. 岸滩侧蚀崩塌速率的试验量测方法. 水科学进展. 2018(04): 537-542 . 本站查看 其他类型引用(1)
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