Tidal Constituents in the Shallow Waters of the Southwest Indian Coast     

S. Arjun  L. Sheela Nair  V. R. Shamji  N. P. Kurian 《Marine Geodesy》2013,36(2-3):206-217

A two-dimensional hydrodynamic model was set up and validated for the west coast of India. The spatio-temporal variation of the tidal constituents for a 110 km stretch of the southwest coast of India was then studied by setting up a fine grid model. The study brings out variability in the shallow water constituents and their selective amplification. Within the Cochin estuary, the amplitudes of almost all the major tidal constituents show a gradual reduction upstream compared to other locations. The shallow water constituents show significant amplification and Z0, the constituent related to mean sea level shows five-fold amplification within the estuary.  相似文献   

恢复饱和过程与潮流不对称耦合作用下的悬沙输运     

李谊纯 《海洋工程》2015,33(1):66-72

通过理想模型的解析解对河口悬移质泥沙输沙中恢复饱和过程与潮流不对称耦合作用下的长期净输运机制进行了研究,并给出了二者耦合作用下的悬沙长期净输运的定量表达及悬沙净输运方向与分潮相对位相的关系。研究认为,悬沙的长期净输运与泥沙的恢复饱和过程及潮流不对称存在密切关系。对于仅单频潮波作用的情况,恢复饱和过程不会导致悬沙净输运的产生;分潮与余流的相互作用将产生与余流方向一致的净输运;悬沙的净输运方向与潮流不对称的方向并不完全一致;对于频率满足一定条件的分潮的组合,不论该分潮组合是否导致潮流不对称,均会产生悬沙的净输运;净输运量是分潮组合中各分潮流速的振幅、相对位相及相对恢复饱和时间的函数。对于某一分潮组合,悬沙净输运与潮流不对称方向改变时,二者的相对位相阈值之间的偏差随恢复饱和时间的增大而增大。  相似文献