河口涨潮沟形成水动力机制初探

根据长江口1965－2000年的地形资料和研究成果，应用理论力学中平面汇交力的平衡条件，对河口涨潮沟形成的水动力机制进行了初步分析和探讨，结果表明，涨潮沟的表成与衰亡与主槽涨潮动力主轴的摆动和涨潮动力的变化密切相关，涨潮沟的利用与整治必须因势利导，顺应其形成机制和演变规律。

Hydrodynamic mechanism of flood tide channel formation at estuaries

Based on the field data of topography of the Yangtze River Estuary from 1965 to 2000 and advances in research, a preliminary analysis is performed of the hydrodynamic mechanism of the formation of flood tide channels at estuaries by use of the equilibrium condition for coplanar concurrent force systems in theoretical mechanics. The results show that the formation and development of flood tide channels are closely related to the variations of values and directions of flood tidal forces in main channels, and that the utilization and regulation of flood tide channels should be based on their formation and evolution regularities.