岛群海域环境下泥沙运动及地形冲淤变化数值模拟研究  

Numerical modeling of sediment transport and seabed erosion and siltation in archipelago sea area

作　　者：左书华[1,2] 张宁川[2] 张征[1] 庄骅 

机构地区：[1]交通运输部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [3]洋山同盛港口建设有限公司,上海201308

出　　处：《泥沙研究》2011年第2期1-8,共8页Journal of Sediment Research

基　　金：交通运输部西部交通科技项目(NO.200632800003-04);交通运输部天津水运工程科学研究所基金(TKS100103);上海市科委科研计划项目(NO.09231200500;09231200503)

摘　　要：建立波浪、潮流共同作用下泥沙运动及地形冲淤积变化数学模型,并根据2007年4月份实测水文泥沙资料对模型进行了验证,验证表明,潮位、垂线流速、流向及含沙量过程的计算值与实测值吻合良好;波浪、潮流共同作用下悬沙引起的冲淤变化与实测冲淤分布趋势基本一致,较好地复演了洋山港工程建设后海域流场、含沙量场和地形变化。运用该模型对洋山深水港西港区工程方案进行了数学模型研究,研究表明,汊道方案实施后,由于颗珠山汊道的存在,使得通道内水流向北偏移,使得通道北侧西部流速较工程前流速有所增加,使西港区地形基本保持冲淤平衡略有冲刷;颗珠山汊道的存在,能够继续保持目前通道南侧淤积,北部刷深的格局,对西部港区的建设是有利的。Combining the effects of tides and waves,a 2-D numerical model is set up to simulate sediment transport and sea bed erosion and siltation in the Yangshan deep-water harbor sea area.The validity of the model is verified by the measured data obtained in Apr.,2007 including the tidal flow and suspended sediment concentration in the vicinity of the harbor.The verification of calculation shows the calculated values are in good agreement with the measured data.The field of tidal currents,suspended sediment concentration and the deformation of seabed can be successfully simulated.Using the numerical model,a case study is applied to research the engineering program in the west harbor area.The results show：（1） After the Kezhushan branch being plugged,due to truncating the tidal volume,the flow velocity in the west harbor area is weakened.At the same time,the weakened flow causes a large amount of deposition in the west harbor;（2） Retaining the Kezhushan branch will make the flow in the west harbor area strengthened.As a whole,the seabed after the Branch channel project will keep quasi-equilibrum or slight erosion;（3） The existence of Kezhushan branch will maintain the situation,i.e.,deposition in the south and erosion in the north,which is favorable for the construction of the west port.

关 键 词：岛群 洋山深水港 波浪 潮流 泥沙 数学模型 

分 类 号：TV142[水利工程—水力学及河流动力学]