摘要
潮波理论模型快速高效,但在钱塘江河口应用甚少.钱塘江河口外水体浑浊,涨潮流亦挟带大量泥沙进入钱塘江河口,泥沙的存在极可能显著影响潮波特征.本文将考虑泥沙减阻效应的动床阻力经验式直接应用于Winterwerp-Wang潮波理论模型,计算得到了与钱塘江河口实测潮波数据吻合的潮波演化结果,检验了现有考虑泥沙减阻效应的动床阻力经验式在以细粉砂为主的钱塘江河口的适应性.研究还表明,床面摩阻、河口收窄幅度（如围垦工程影响等）、水深等因素均对潮波演变、尤其是潮差的沿程变化有重大影响.
Tidal analytical models provide an efficient and accurate tool for tidal prediction,but are rarely applied to the Qiantang Estuary. Large amount of sediment is often pumped into this area from the turbid open sea by tidal flood current,which may in turn affect the bed frictions and thus the tidal wave propagation. By incorporating sediment-induced drag reduction,this paper extends Winterwerp-Wang＇s tidal analytical model for tides free of sediment to sediment-laden tidal waves. Application of this improved tidal analytical model to the silt-dominant Qiantang Estuary suggests the significant importance of the sediment-induced drag reduction,supported by the better agreements between the computed and measured tidal data. Sensitivity analyses of the effects of several parameters on the tidal propagation indicate that the bed friction,estuarine convergence magnitude（ viz.,effects of land reclamation）,and water depth play important roles in regulating the tidal waves from the estuary mouth to the upstream end.
作者
李薇
苏正华
徐弋琅
胡鹏
贺治国
吴保生
LI Wei;SU Zhenghua;XU Yilang;HU Peng;HE Zhiguo;WU Baosheng(Ocean College,Zhejiang University,Zhoushan 316021,China;State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2018年第5期954-964,共11页
Journal of Basic Science and Engineering
基金
国家自然科学基金项目(11502233)
浙江省自然科学基金项目(LQ15E090002)
浙江省杰出青年基金项目(LR19E090002)
舟山市科技计划项目(2017C82225)
关键词
潮波运动
泥沙减阻效应
潮差
钱塘江河口
tidal propagation
sediment-induced drag reduction
tidal range
Qiantang Estuary
