渤海波浪和潮汐风暴潮相互作用对波浪影响的数值研究

基于依赖波浪成长状态波令的表面风应力，提出了一个波浪和风暴潮潮汐运动相互作用的联合数值模式，实现了第三代波浪模式和三维风暴潮潮汐模式联合作用的数值研究，并结合渤海典型天气个例的研究，给出了渤海波浪和风暴潮潮汐相互作用对波浪影响的机制和大小量级的定量估计。研究表明，对不同天气过程，波浪和风暴潮潮汐相互作用对波浪影响的性质和大小不同；对强寒潮过程，对波浪影响主要由风暴潮所支配波高调制可达1m，在黄河口区一般达0．5m；对弱天气过程，对波浪影响主要由潮所控制，波高调制约在0．2m，联合作用模式给出的结果与实测更吻合。

NUMERICAL STUDY OF THE INFLUENCE OF WAVES AND TIDE SURGE INT ERACTION ON WAVES IN BOHAI SEA

This paper developed a joint numerical model of wave and tide-surge motion.The model consists of an advanced third generation shallow water wave model and a th ree dimensional tide-surge model,taking into account all wave-current interact ions and time varying depth.The joint interaction was carried out by running the two models interactively,exchanging calculated data of sea parameters at regula r time intervals.The joint model was applied to the Bohai Sea.For the typical we ather cases,influence mechanisms of wave and tide-surge interaction on waves an d quantitative estimates of magnitude were obtained.The results demonstrate that the influence nature and magnitude vary with weather conditions; for the cases of moderate intensity,the effects of wave-tide-surge interaction on waves are mainly dominated by tides,but for strong cold waves,the effects of wave-tide-s urge interaction on waves are mainly dominated by storm surges and in these case s both storm elevation and currents have some effects on waves,to a certain de gree.At the Huanghe River mouth,the effects of storm set up and currents on wave s are inverse and partially cancel out,weakening the interaction effects;in gene ral，for strong cold wave cases,wave height maximum modulation can reach 1m,and a t the Huanghe River estuary up to 0.5m;for weak weather cases,wave height maximu m modulation is around 0.2m.The results computed by the joint model are in good agreement with measured data.