长江九龙滩河段浅滩航道整治

长江九龙滩浅滩河段有鼓鼓碛、蕉芭滩和三角碛3处碍航。在碍航成因分析的基础上,结合航道整治目标原则,提出了整治方案。应用平面二维水流泥沙数学模型探讨方案整治效果,经水流条件和典型年泥沙冲淤特性对比分析,进行方案比选与优化,形成了推荐方案。选用2002—2011年水沙序列资料,研究方案实施后长时期内的航槽泥沙冲淤规律,结果表明,方案实施后航道尺度满足要求,航槽可长期保持稳定,整治效果较为理想,达到了预期整治目标。

Waterway regulation to Jiulongtan shoal reaches in the Yangtze River

There are three main navigation hindering areas in Jiulongtan shoal reaches of the Yangtze River,which are Guguqi,Jiaobatan and Sanjiaoqi.On the basis of navigation hindering cause analysis and combining the target and principle of waterway regulation,we propose the regulation schemes.The 2-D flow and sediment mathematical model is applied to investigate the regulation effects of different schemes.According to the flow conditions and sediment erosion and deposition characteristics of the typical year,we compare and optimize the waterway regulation schemes,and then propose the recommended one.Using the flow and sediment series data of year 2002 to 2011,we study the laws of long-term channel sedimentation,the results of which show that after implementation of the recommended scheme,the channel scale meets the design requirements and can remain stable,which indicates that the regulation effect is remarkable and has achieved the expected goal.