岸滩演变对入江口门航道的影响

各支流入江口门是沟通各支流和长江的关键部位,其河床稳定性对保持航道畅通具有重大作用.选择南京河段梅子洲汉道段秦淮新河口和城南河口为研究对象,分析入江口门岸滩演变特征,并结合入江口门历年疏浚资料,分析岸滩演变对入江口门航道的影响.研究成果表明,岸滩演变不仅形成了入江口门的河道局部条件,并且制约口门的水沙条件,因此,对入江口门的水流、泥沙运动和航道产生重大影响.

Effect of evolution of beach on waterway of the entrance to the Yangtze River

The entrance to the Yangtze River is the key part of linking tributaries to the Yangtze River, and the bed stability is important for the smooth transport of waterway. By taking the entrance of Qinhuai river and the entrance of Chengnan river of Nanjing reach as the research cases, we analyze the features of the beach evolution.Based on the existing data on dredging, we study the effect of beach evolution on the entrance waterway to the Yangtze River. The research results show that the beach evolution not only forms the local conditions of the entrance waterway, but also affects the water and sediment condition, thus it has great influence on the current, sediment motion and waterway of the entrance to the Yangtze River.