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琼州海峡的流、浪、潮要述 总被引:1,自引:0,他引:1
根据实测的10个点的资料并结合数模计算简述了琼州海峡流、浪、潮的基本特征。由于受地形及流系的复杂影响,其水体流动基本为东西走向的往复流,波浪受台风及季风的影响以及地形的制约,台风的4级波高出现率全年占51%_56%。给出的10个计算点各种重现期的波高、流速值及其方向,是拟建的跨海工程的重要设计参数。 相似文献
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压力式波浪/潮位测量仪对比试验初报 总被引:1,自引:0,他引:1
介绍了新研制的压力式波浪/潮位测量仪和垂线测波记录仪、S4浪潮流仪在水深8.5m处所作对比试验的结果。结果表明,潮 比测效果明显优于波浪的比测效果。应用压力式波潮仪测浪的比测结果尚可接受,但应该指出,当测量大浪时,误差会减小,其效果将合明显提高。为提高观测的质量,还应在水深较深处(50m)进行比测试验。 相似文献
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文章根据三亚湾和台山广海湾实测水位数据,分析了2010年智利和2011年日本海啸在中国近岸传播的海啸波形。通过与2个深海海啸观测浮标(DART)观测到的海啸波形对照,采用功率谱分析和小波分析技术,研究远场海啸在中国华南沿岸的海啸波特征和传播规律。在2次事件中,海啸波通过巴士海峡进入中国南海后,大约3~4h到达华南沿岸。地形效应是决定海啸波能量的重要因素,特定周期的海啸波得到选择性增强。海啸波在近岸海湾持续时间长达2~3d,海啸波周期越长,持续时间越久。2次海啸事件均未对我国沿海造成灾害性影响,但是通过海啸波形的对比分析,能够更好地了解南海北部地形对海啸波的响应特征,为防范海啸提供借鉴。 相似文献
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Generally, tsunami waves become hazardous only when approaching the coast. Studying the runup and inundation of tsunami waves
is important for understanding the tsunami evolution and for tsunami hazard assessment. Here, we simulated the 1993 Hokkaido-Nansei-Oki
(HNO) tsunami using a finite-difference model based on nonlinear shallow-water equations. We focused on the runup and inundation
of tsunami wave propagation onto coastal area of Okushiri Island near Hokkaido, Japan, and investigate the relationship of
different runup heights with the morphology and bathymetry of the seashore. In the simulation, a nested 4-layer grid system
and moving boundary technique are adopted to study runup and inundation. The calculated tsunami heights and inundations in
the region agreed well with field measurements. The local bathymetric and topographic characteristics had a first-order effect
on the runup. Numerical experiments show that the focusing of certain local bathymetric features would amplify both wave height
and current velocity remarkably. The results show that computation on dense grids is necessary to reproduce the observed runup
heights, and inundation velocity is an important factor preventing tsunami devastation. In addition, we discussed the potential
capability of sediment transport to illustrate the impact of tsunami waves on coastal geomorphology. 相似文献
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《压力式波潮仪》海洋行业标准由中国科学院南海海洋研究所负责起草,标准编制组的主要成员王盛安、龙小敏、蔡树群、陈俊昌、姚小桂是近年来从事压力式波潮仪研制、试生产的科研人员。 相似文献
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