【作者】 吴婉蓉； 郑阳； 李强； 毛献忠；

【Author】 WU Wan-rong;ZHENG Yang;LI Qiang;MAO Xian-zhong;Graduate School at Shenzhen,Tsinghua University;

【机构】 清华大学深圳研究生院；

【摘要】 海湾潮能通量的分布对湾内地形地貌的塑造、污染物迁移扩散等有重要影响,同时地形地貌又会影响潮能通量。本文采用Delft3D水动力模型研究了深圳湾内的水动力以及潮能通量分布特征。结果表明:大潮的平均潮能通量是小潮的2.3倍,丰水期湾顶潮能通量约是枯水期的1.5倍;潮能通量与水深和海湾形态相关,海湾形态决定潮能通量的分布,而潮能通量又影响地形;水深较大的湾口潮能通量最大,湾中部至湾顶海床抬升和断面扩张,潮能通量大幅下降,只有湾口的20%～5%;由于潮能动力不足,内湾泥沙淤积较为严重;深圳河至湾顶受径流影响,潮能通量增大,是维系河口潮沟稳定的动力。更多还原

【Abstract】 The distribution of tidal energy fluxes has an important influence on the shaping of topography and geomorphology,the transport and diffusion of pollutants,etc.At the same time,the topography and geomorphology will affect the tidal energy fluxes.In this paper,the Delft 3 D hydrodynamic model was used to study the hydrodynamic and tidal energy flux distribution in Shenzhen Bay.The results show that the average tidal energy flux of the spring tide is 2.3 times of that of the neap tide,and the energy flux at the bay head during the wet season is about 1.5 times of that in the dry season.The tidal energy flux is related to the water depth and the shape of the bay.The distribution of the tidal energy flux depends on the shape of bay,and affects the topography.At the mouth with deep water,the tidal energy flux reaches the largest.The tidal energy flux decreases greatly to 20%-5% from the middle of the bay to the Shenzhen estuary,corresponding to water depth decrease and cross section expansion.The weak tidal energy results the sediment deposition at the inner bay.The tidal energy flux increases from Shenzhen estuary to the top of the bay because of the runoff,which is the driving force to maintain the stability of the tidal channel.更多还原