基于Boussinesq波浪模型的港池波浪数值模拟与泊稳分析     

吴亚楠  武贺  周庆伟  马勇 《海洋通报》2021,40(3)

基于Boussinesq方程的MIKE21-BW模型,建立等水深、双突堤式的波浪数值港池,采用不同的波浪入射方向和双突堤口门宽度,分别对波浪经双突堤后的绕射情况进行模拟。根据《港口与航道水文规范》中的计算参数和突堤绕射系数结果,对BW模型进行率定和验证,结果表明二者吻合度较好,可以较好地描述港池的泊稳状况。在此基础上,利用MIKE21-BW模型对秦皇岛某港口防波堤工程的不同布局方案进行模拟计算和泊位稳定性分析,提出了工程设计方案建议。  相似文献   

A composite numerical model for wave diffraction in a harbor with varying water depth   总被引：2，自引：2，他引：0  

ZHAO Ming  TENG Bin 《海洋学报(英文版)》2004,23(2):367-375

A composite numerical model is presented for computing the wave field in a harbor. The mild slope equation is discretized by a finite element method in the domain concerned. Out of the computational domain, the water depth is assumed to be constant. The boundary element method is applied to the outer boundary for dealing with the infinite boundary condition. Because the model satisfies strictly the infinite boundary condition, more accurate results can be obtained. The model is firstly applied to compute the wave diffraction in a narrow rectangular bay and the wave diffraction from a porous cylinder. The numerical results are compared with the analytical solution, experimental data and other numerical results. Good agreements are obtained. Then the model is applied to computing the wave diffraction in a square harbor with varying water depth. The effects of the water depth in the harbor and the incoming wave direction on the wave height distribution are discussed.  相似文献   

以现代渔港经济区理念看广东惠来县神泉港的发展   总被引：1，自引：0，他引：1  

周春山  罗彦 《热带地理》2005,25(1):33-37

分析了现代渔港经济区的内涵、构建思路与关键问题,指出神泉渔港发展所面临的问题、发展的优势与发展的契机,并结合现代渔港经济区理念,具体探讨了神泉现代渔港经济区的发展设想、发展策略与对策措施。  相似文献   

基于航运成本的北极东北航道集装箱运输潜力研究   总被引：1，自引：0，他引：1       下载免费PDF全文

寿建敏  冯远 《极地研究》2015,27(1):65-73

根据北极东北航道航运环境,对北极航行船舶进行了技术和经济分析,并在分析中欧货物贸易量和集装箱运输量的基础上,对北极东北航道集装箱航运网络的构建进行了研究,设立北极东北航道航运技术和经济分析方案,建立了航运技术经济成本分析模型,并对不同规模船型通过北极东北航道的集装箱运输成本进行了比较分析。在北极航道以卑尔根港为轴幅式枢纽港的集装箱运输成本分析基础上,提出了建设新的欧洲轴幅式枢纽港有利于提高北极航道竞争力的推论。论文的结论表明,在目前北极航道航行环境下,航行时间节约不多,航次成本节约在10%左右,燃油成本节约较大,达35%左右。  相似文献   

A recent history of metal accumulation in the sediments of Rijeka harbor, Adriatic Sea, Croatia   总被引：2，自引：0，他引：2  

Neven Cukrov  Stanislav Fran?iškovi?-Bilinski 《Marine pollution bulletin》2011,62(1):154-167

We studied metal pollution in the sediments of Rijeka harbor, including anthropogenic influence during recent decades and at the present time. Sediment profiles were collected at ten sampling points. The concentrations of 63 elements in bulk sediment were obtained using ICP-MS, and the concentrations of selected elements were evaluated by statistical factor analyses. We also calculated metal-enrichment factors and geoaccumulation indices and constructed spatial-distribution maps.Mercury (Hg) was the heaviest pollutant, with concentrations exceeding 4 mg/kg. Silver (Ag) was the second most important pollutant, with constantly increasing values. The average concentrations of the most toxic elements were comparable to those found in sediments of other ports throughout the world, and their toxicity ranged from threshold values [chromium (Cr), arsenic (As)] and midrange-effect values [cadmium (Cd), lead (Pb), copper (Cu), zinc (Zn), nickel (Ni)] to extreme-effect values (Hg). Metal pollution has decreased during recent decades, except for Ag and barium (Ba).  相似文献   

Holocene coastal change in the ancient harbor of Yenikap?-?stanbul and its impact on cultural history     

Oya Algan  M. Nam?k Yalç?n  Yücel Y?lmaz  Elmas K?rc?-Elmas  Özlem Bulkan  Cem Gazio?lu  Mehmet Ali Polat 《Quaternary Research》2011,76(1):30-45

An extensive rescue excavation has been conducted in the ancient harbor of ?stanbul (Yenikap?) by the Sea of Marmara, revealing a depositional sequence displaying clear evidence of transgression and coastal progradation during the Holocene. The basal layer of this sequence lies at 6 m below the present sea level and contains remains of a Neolithic settlement known to have been present in the area, indicating that the sea level at ~ 8-9 cal ka BP was lower than 6 m below present. Sea level advanced to its maximum at ~ 6.8-7 cal ka BP, drowning Lykos Stream and forming an inlet at its mouth. After ~ 3 cal ka BP, coastal progradation became evident. Subsequent construction of the Byzantine Harbor (Theodosius; 4th century AD) created a restricted small basin and accumulation of fine-grained sediments. The sedimentation rate was increased due to coastal progradation and anthropogenic factors during the deposition of coarse-grained sediments at the upper parts of the sequence (7th-9th centuries AD). The harbor was probably abandoned after the 11th century AD by filling up with Lykos Stream detritus and continued seaward migration of the coastline.  相似文献   

Theoretical Analysis of Harbor Resonance in Harbor with An Exponential Bottom Profile   总被引：2，自引：0，他引：2  

王岗  郑金海  梁秋华  张蔚  黄诚 《海洋工程》2015,29(6):821-834

The general features of oscillations within a rectangular harbor of exponential bottom are investigated analytically. Based on the linear shallow water approximation, analytical solutions for longitudinal oscillations induced by the incident perpendicular wave are obtained by the method of matched asymptotics. The analytic results show that the resonant frequencies are shifted to larger values as the water depth increases and the oscillation amplitudes are enhanced due to the shoaling effect. Owing to the refraction effect, there could be several transverse oscillation modes existing in when the width of the harbor is on the order of the oscillation wavelength. These transverse oscillations are similar to standing edge waves, and there are m node lines in the longshore direction and n node lines running in the offshore direction corresponding to mode (n, m). Furthermore, the transverse eigen frequency is not only related to the width of the harbor, but also to the boundary condition at the backwall and the bottom shape.  相似文献   

Computation of Long-Term Statistical Properties of Wave Agitation in Harbors     

LIN Jaw-Guei  TUNG Chi C. 《中国海洋工程》1998,(3)

In this paper,the long-term statistical properties of wave height in an idealized square harborwith a partial opening are studied.The incident waves are propagated into the harbor numerically by the fi-nite/infinite element method using three different wave models:(1)monochromatic wave train,(2)long-crested random wave train,and(3)short-crested random wave train.This study shows that for a giv-en incident wave,the wave height in the harbor is affected by the wave model used.For long-term estima-tion of wave height exceedance probability,it is recommended that the waves be propagated into the har-bor using the random wave model,and that wave heights be computed by use of the Rayleigh probabilitydistribution.  相似文献   

板桩码头在黄河油港的实践     

杨云龙  褚良清 《海岸工程》1998,17(2):35-39

介绍了建筑黄河油港,采用板桩结构码头设计工艺和施工技术,码头建成投产至今,经历了百扯遇强台风考验,为在淤泥质开敞海底建设板桩码头取得了成功经验。  相似文献   

Morphodynamic responses to the deep water harbor development in the Caofeidian sea area,China's Bohai Bay     

Yongjun Lu  Rongyao JiLiqin Zuo 《Coastal Engineering》2009

Vast bay-type tidal inlets can be found along the coastal zones of China. They are generally suitable for deep water channels and large harbors because of the presence of large water depth and good mooring conditions. The deep channel, in front of the head of Caofeidian Island in Bohai Bay, China, is a typical bay-type tidal inlet system. The tidal current, a type of reverse flow, makes the key contribution to maintain the deep water depth. The co-action of waves and tidal currents is the main dynamic force for sediment motion. Waves have significant influence on the sediment concentration. Based on the characteristics of waves, tidal currents, sediment and seabed evolution in Caofeidian sea area, a 2D mathematical model for sediment transport under influence of waves and tidal currents is developed to study the development schemes of the Caofeidian Harbor. The model has been verified for spring and neap tides, in winter as well as in summer of 2006. The calculated tidal stages, flow velocities, flow directions and sediment concentrations at 15 stations are in good agreement with the observations. Furthermore, the calculated data on pattern and magnitude of sedimentation and erosion in the related area agree well with the observations. This model has been used to study the effects of the reclamation scheme for Caofeidian Harbor on the hydrodynamic environment, sediment transport and morphological changes. Attentions are paid to the project inducing changes of flow velocities and morphology in the deep channel at the south side of Caofeidian foreland, in the Laolonggou channel and in various harbor basins. The conclusions can provide the important foundation for the protection and use of bay-type tidal inlets and the development of harbor industry.  相似文献