Bottom Sediment Transport in the Flood and Ebb Channels of the Changjiang Estuary

Bottom Sediment Transport in the Flood and Ebb

Channels of the Changjiang Estuary

刘高峰;沈焕庭;王永红;吴加学

【期刊名称】《海洋通报（英文版）》 【年(卷),期】2004(006)001

【摘要】Nanxiaohong and Nangang main south channel are chosen as the typical flood and ebb channels. Hydrodynamics analysis based on field hydrological and sediment data is conducted with Gao-Collins model to analyse sediment transport trends. Also, the grain size distribution analysis of the bottom sediment sampled in Sep. 2001 is used as the base of the analysis. The result shows that the sediment in Nanxiaohong is from the rive mouth area. The sediment transports upwards with the flood flow which is stronger than the ebb flow, i.e., in the direction of SE-WN. The sediment in main south channel comes from upward. They transport downwards with the ebb flow, which is stronger than the flood flow, i.e., in the direction of WN-SE. The directions, sources and mechanism of sediment transport are identified according to comprehensive analyses of the observed data on hydrodynamics and sediment. 【总页数】8页(88-95)

【关键词】Flood channel;Ebb channel;Changjiang Estuary;Sediment transport