茅尾海航道开发潮流物理模型试验研究

茅尾海浅滩位于河流出口与潮水相互作用的区域,航道开发面临特殊的水流、泥沙问题。借助潮流物理模型试验,模拟整个茅尾海海域潮流情况,对开发航道方案流态、潮流场变化进行模型试验对比分析,对航道泥沙淤积问题进行计算分析。试验及分析结果表明:3个方案中,瓦泾江出口航道挖深最大,航道水流增加最大,淤积强度也最大,不利于航道维护;大榄江航道方案B利用深槽,挖深较小,水流变化也不大,但航道最大横流最大,不利于船舶航行安全。鉴于在河流出口与潮水作用浅滩开挖航道将面临落潮归槽水流影响、局部流速及淤积量增加较大、航道拐弯处横流太大影响船舶安全等问题,航道开发应尽量利用横流较小的深槽,可适当进行开挖。

Tidal current experimental study on waterway development in Maoweihai sea

The shoal of Maoweihai locates in the interactional area of the river outlet and tidal current,and the waterway development of it faces sophisticated flow and sediment problems.With current physical model,we simulate the whole tidal current,carry out a comparative analysis on the current pattern and current field variation of the waterway to be developed,and calculate the sediment in the waterway.The results show that it is very bad to maintain the waterway for the largest digging depth,the biggest increase of channel flow and the greatest siltation in Wajingjiang channel.It is unsafe to ship navigation for the biggest cross flow in Dalanjiang waterway plan B.In view of problems such as the influence from the tank water of ebb tidal,greater local velocity and sediment deposition,as well as the serious cross flow at the turning part of the waterway,channel development shall choose the deep groove with small cross-flow and may dredge properly.