怒江芒旦滩连续分汊河道中枯水期碍航特性研究  

Navigation obstruction characteristics of Mangdantan continuous branching channel of Nujiang River in normal and dry seasons

作　　者：上官弋非 何进朝[2,4] 谢峰 袁浩 赵江[3] SHANGGUAN Yifei;HE Jinchao;XIE Feng;YUAN Hao;ZHAO Jiang(The College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Southwest Water Conservancy and Water Transport Engineering Research Institute,Chongqing Jiaotong University,Chongqing 402247,China;Sichuan Communication Surveying&Design Institute Co.,Ltd.,Chengdu 610017,China;Chongqing Xike Consultation for Water Transport Co.,Ltd.,Chongqing 402247,China)

机构地区：[1]重庆交通大学,河海学院,重庆400074 [2]重庆交通大学,西南水利水运工程科学研究院,重庆402247 [3]四川省交通勘察设计研究院有限公司,四川成都610017 [4]重庆西科水运工程咨询有限公司,重庆402247

出　　处：《水运工程》2025年第2期142-149,156,共9页Port & Waterway Engineering

摘　　要：芒旦滩河段是怒江中下游连续出现3个分汊的碍航滩险河段,水流条件复杂。为研究芒旦滩连续分汊河段碍航特性,通过平面二维水动力数学模型,计算中枯水期不同流量对各汊道分流比、水面比降、水深条件和流速分布的影响。计算结果表明,芒旦滩连续分汊河段天然条件下的碍航特性为水面比降大、水深不足与水流湍急,且汊道组合R_(1)-L_(2)-L_(3)水流条件优于汊道组合R_(1)-R_(2)-L_(3),建议开发汊道组合R_(1)-L_(2)-L_(3)作为航道。研究成果可为芒旦滩整治以及类似的连续分汊河段航道开发提供技术支撑和理论参考。The Mangdantan channel,consisting of three continuous branches,locates in the middle and lower reaches of the Nujiang River with bad flow condition.To investigate the natural navigation obstruction characteristics in Mangdantan continuous branching channel,the influence of different discharges in normal and dry period on the flow diversion,gradient,water depth condition and current speed distribution are numerically analyzed by the two-dimensional planar hydrodynamic model.The results show that the natural navigation obstruction characteristics include large gradient,insufficient water depth and rapid current speed.In addition,the flow condition in the branches R_1-L_2-L_(3) is better than those in the branches R_1-R_2-L_3,therefore the branches R_1-L_2-L_(3) are suggested to be developed as the navigation channel.The research results can provide technical support and theoretical guidance for the regulation of Mangdantan and the channel development of similar continuous branching rivers.

关 键 词：连续分汊河道 数值模拟 分流比 流速分布 碍航特性 

分 类 号：U617[交通运输工程—船舶及航道工程]