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OALib Journal期刊
ISSN: 2333-9721
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钦州湾台风浪的多年一遇极值推算
Keywords: 钦州湾,海浪模式,皮尔逊ⅲ(p-ⅲ)频率适线法,多年一遇
Abstract:
？利用wavewatchⅲ(ww3)和swan海浪模式模拟了1949—2005年间对钦州湾海域影响较大的台风浪。以模拟结果为基础,利用皮尔逊ⅲ(p-ⅲ)频率适线法推算了钦州湾湾外深水的累积频率波高和平均波周期(tm)的多年一遇极值,同时模拟了其间在百年一遇高潮水位条件下的台风浪,以及在百年一遇高潮水位、百年一遇风暴潮增水共同作用下对钦州湾影响较大的台风产生的波浪场。使用p-ⅲ法推算了在极端天气下,钦州湾湾内统计点的累积波高和平均波周期的多年一遇极值。研究结果表明,由于湾内浅滩较多,波浪在传播过程中水体底部摩擦使能量耗损明显,所以湾内波高较小,湾口处的波高大于内湾处的波高。近岸海区的波浪耗散、破碎等物理过程比较强烈,因此近岸统计点c1处的波高极值最小,其最大波高向岸边快速减弱并沿东向传播。在极端天气情况下,波浪在传播过程中发生破碎,波高衰减显著。
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