摘要
Abstract
Depending on the deep water channel construction projects of the Yangtze River below Nanjing ,us⁃ing the measured hydrologic and topographic data,water and sediment exchange of the local beach groove,charac⁃teristics,associated effects of the bed evolution in the Tongzhousha and Baimaosha were studied. Meanwhile,ac⁃cording to the characters of time and space distribution of water and sediment exchange in the Tongzhousha ,sub⁃merged breakwater project scope and elevation of the first phase construction were determined. By the analysis:in Tongzhousha and Baimaosha which are branching tidal rivers with silty sand substrate,beach groove sediment ex⁃change is through the transportation of the suspended sediment,and trend (especially the ebb tide) is the main en⁃gine to lift,transport and exchange flow and suspended sediment of the beach groove. Water⁃sediment exchange caused by ebb current is the important factor shaping and changing local beach groove form and influencing the lo⁃cal stability of deep groove. Considering the scouring on the beach surface by the flow in Tongzhousha ,the dikes are layout in the left of submerged breakwater to protect the beach.关键词
深水航道/滩槽水沙交换/通州沙河段/白茆沙河段/关联性Key words
deep water channel/water-sediment exchange in beach groove/the Tongzhousha/the Baimaosha/relevance分类
交通工程
