斯里兰卡汉班托塔港附近海域的波浪特征模拟分析  

Numerical simulation and analysis on wave characteristics in nearby sea of Hambantota Port,Sri Lanka

作　　者：莫忠璇 吕迎雪[1,2,3,4] 孔丛颖 张军[5] MO Zhong-xuan;LU Ying-xue;KONG Cong-ying;ZHANG Jun(CCCC Tianjin Port Engineering Institute Co.,Ltd.,Tianjin 300222,China;CCCC First Harbor Engineering Co.,Ltd.,Tianjin 300461,China;CCCC Key Hydrodynamic Laboratory for Coastal Engineering,Tianjin 300222,China;Enterprise Key Laboratory of Underwater Tunnel Construction Operation and Maintenance Technology of Tianjin,Tianjin 300461,China;CCCC-FHDI Engineering Co.,Ltd.,Guangzhou,Guangdong 510000,China)

机构地区：[1]中交天津港湾工程研究院有限公司,天津300222 [2]中交第一航务工程局有限公司,天津300461 [3]中国交建海岸工程水动力重点实验室,天津300222 [4]天津市水下隧道建设及运维技术企业重点实验室,天津300461 [5]中交第四航务工程勘察设计院有限公司,广东广州510000

出　　处：《中国港湾建设》2021年第12期12-17,共6页China Harbour Engineering

摘　　要：斯里兰卡位于印度洋北部,每年都受到东北季风和西南季风的影响。波浪观测发现,当地的波浪周期较长,且存在风浪、涌浪混合的情况。基于该区域的波浪情况,采用了气象水文再分析数据库的资料作为输入条件,相关海图作为地形条件,MIKE21 SW模型计算了汉港附近海域的波浪。其中,波浪计算按输入条件不同,考虑了3种模式,ERA-interiam、ERA5、ERA5风涌混合浪(ERA-Is、ERA-IIs、ERA-IId)。将计算结果与观测结果进行对比。经比较,有效波高模型值与观测值拟合均较为接近。平均周期上,ERA-Is、ERA-IIs拟合的效果略好。在谱峰周期上,ERA-IId拟合效果明显较优。该区域为大涌浪叠加小风浪,谱峰周期和平均周期比值大于J谱,采用传统的J谱方法(ERA-Is、ERA-IIs)低估了波浪的能量,ERA-IId兼顾了风浪和涌浪模拟波浪更为精确。Sri Lanka is located in the northern part of the Indian Ocean,experiencing Northeast monsoon and Southwest monsoon every year.Through wave observation,a long period wave mixing with wind wave and swell was found in nearby sea.Based on the wave situation in this area,the data of meteorological and hodrological reanalysis database was used as the input condition,the relevant charts were used as the topographic condition,and the MIKE 21 SW model was used to calculate the waves in nearby sea of Hambantota Port.According to different input conditions,three modes which are the ERA-interiam,ERA5,and the mixed waves of wind sea and swell ERA5(ERA-Is,ERA-IIs,ERA-IId)were considered in wave calculation.The calculated results were compared with the observed results,the results show that the the fitting between the model value and observed value of effective wave height is relatively close.ERA-Is and ERA-IIs have slightly better similarity performance in mean wave period,ERA-IId had much better similarity performance in peak wave period.With large swell and small wind wave co-existence condition,ratio of peak wave period and mean wave period is higher than typical J spectrum wave.The traditional J spectrum method(ERA-Is,ERA-IIs)underestimates the wave energy,and ERA-IId takes both wind wave and swell into account,resulting a more precise description on local wave.

关 键 词：波浪后报模拟 ERA5模型 风涌混合波浪 

分 类 号：U655.11[交通运输工程—港口、海岸及近海工程] P731.22[交通运输工程—船舶与海洋工程]