援萨尔瓦多拉利伯塔德码头损坏成因分析

Causes of damage at La Libertad Pier in El Salvador

“巨涌”是萨尔瓦多拉利伯塔德码头损坏的主要原因。采用NOAA全球再分析波浪资料,分析工程海域大浪特征。结果表明,每年有2场超级大浪,类似“海啸型”巨涌,来自南太平洋(澳大利亚东侧)、南大洋海域,沿最大圆路径跨洋传播,到达萨尔瓦多需要12~20 d;大浪传入浅水区后,因地形折射效应波向转为S向,经过浅水效应,波高急剧增大直至破碎。根据长周期涌浪传播特性,可提前进行大浪预警,进而指导施工作业和码头运营。

“Huge swell”is the main cause of damage to La Libertad Pier in El Salvador.We use the NOAA global reanalysis wave data to analyze the characteristics of high waves in the project sea area.The results show that there are two super high waves every year,similar to“tsunami-like”swell,which come from the South Pacific(east of Australia)and the South Ocean,propagate across the ocean along the great circle path,and reach El Salvador for about 12 to 20 days.When the high wave propagates into the shallow water area,wave directions change to S direction due to the terrain refraction effect and wave heights increase sharply due to the shallow water effect until it is broken.According to the propagation characteristics of long-period swell,the high wave warning can be carried out in advance to guide the construction and wharf operation.