摘要
本文通过对日照港以北黄、渤海沿岸18个港湾8～27年假潮资料的分析,给出了不同区域港湾的假潮状况和成因。在该区域只有龙口港可时常发生100cm左右的大振幅假潮和>150cm甚至>300cm的特大振幅假潮,属假潮特别严重和唯一发生较大危害性假潮港湾:其余分属假潮相对较重、较轻和无假潮港湾,其假潮基本不具危害性或无危害性。分析结果表明其突然而剧烈的风场变化是导致各港湾假潮的直接原因,地理环境差异是造成港湾假潮强弱的关键因素;龙口港100cm左右和>150cm的大和特大振幅假潮,是其特殊地理环境、港湾及附近大范围海域骤猛的向港爆发性大风,尤其强雷暴大风涌水在港内骤然积聚和海水惯性振荡的综合结果。
In this paper, 8-27 years seiche data in 18 harbors along Yellow Sea-Bohai Sea to the north of Rizhao Harbor are analyzed. It is pointed that, large seiche of about 100cm (with some≥150cm or even ≥300cm) were usually observed in Longkou Harbor which is the most serious seiche harbor and only one with large disaster. Others are heavy, light and no-seiche harbors without serious disaster. Analysis results show that, sudden and strong wind field changes is the direct cause of seiche, while geographic environmental difference is the important factor resulting in different seiche intensity. Large (about 100cm) and extremely large (≥150cm) seiche in Longkou Harbor is comprehensive result of many factors, such as: special geographic environmental, sudden and strong harbor ward gale, especially thunderstorm gale which introduces surge water accumulates in harbor, and inertial vibration, etc.
出处
《海洋预报》
北大核心
2003年第4期5-13,共9页
Marine Forecasts
基金
国家海洋局北海分局科研基金资助项目
海北科发[2000]390号。
关键词
假潮
假潮
危害性
成因
风场变化
雷暴大风
seiche
danger
cause of formation
Wind field variety
Thunderstorm gale
