廉洲湾水流动力场对北海港域泥沙运移的影响

Influence of Water Current Dynamic Field in Liangzhou Bay on Sediment Movements in Beihai Harbor Area

关键词:  水流动力场  泥沙运移  港湾

Key words:  water current dynamic field  sediment movement  harbor

摘要:

根据廉洲湾海洋动力场形成机制探讨了北海港域泥沙运移趋势。表明,廉洲湾潮流具有明显往复特点,落潮流大于涨潮流,有利于湾内冲刷深槽的形成,使北海港域保持相对稳定或微淤状态。但在深槽以北开阔海域,风浪作用加速南流江夏季冲淡水携沙向外运移,甚至波及港口一带,形成不断外移趋势。湾内工程开发不当会加快湾内泥沙洄淤的速度。

Abstract:

The tidal current movement in Beihai Harbor area was analyzed based on the formation mechanism of water current dynamic field in Lianzhou Bay. The results showed that the tidal currents were obviously characterized on move back and forth in Liangzhou Bay and falling tidal currents were greater than rising ones, which was good for forming wash troughs and keeping the sediment relative stability in slight accumulation in Beihai Harbor area. But in the northern wide area of the troughs, the wind and wave actions accelerate the fresh water carrying sediment importing from Nanliujiang River in summer into sea and affect the Beihai Harbor area. The project development might speed up sediment accumulation in Lianzhou Bay.