摘要
利用基于有限元方法的ADCIRC模式,并耦合SWAN波浪模式,建立了一个适用于长江口及其邻近海区风暴潮的数值预报模式。该模式采用对岸线有较好拟合能力的无结构网格,综合考虑了波浪、天文潮、风暴潮、径流相互作用。利用该模型对长江口及其邻近海区一系列台风风暴潮进行后报检验,计算结果与实测资料有较好的一致性。最后,利用建立的模式,针对影响长江口地区的两类典型路径台风——近转向型台风和登陆型台风,讨论了气压、风应力、台风路径等因素对增水的贡献;并对台风移动路径与外高桥实测增水强度进行统计分析,给出了台风移动路径、气压梯度和增水强度的定量关系。
A numerical model with unstructured grid and high resolution, which is based on ADCIRC and coupled with SWAN is developed to simulate the storm surges in the Changjiang Estuary and its adjacent areas. The effects of tide, wave and river discharge are considered in the numerical model. Hindcasts of the water surges induced by tropical cyclones are performed and the results are in good agreement with observations. The model is then utilized to study and analyze the patterns of surge caused classes of typhoons-landing and direction-changing typhoons. Influences on surge caused by air pressure, wind stress and typhoon tracks are investigated with numerical experiments. Quantitative relationships among surge range, pressure gradient and typhoon tracks are revealed by statistical analysis of typhoon tracks and observed surge records at the Waigaoqiao station.
出处
《海洋科学进展》
CAS
CSCD
北大核心
2015年第2期182-194,共13页
Advances in Marine Science
基金
国家海洋局
海洋预报业务化系统模块化与应用示范--长江口咸潮
泥沙数值预报系统研制(20120517-2)
