岱山西北海域海床冲淤演变分析*

根据不同年份的水深地形资料及遥感影像,采用GIS技术对近30 a来岱山西北岸线变化及海床冲淤进行数字化分析。同时,结合该海域的水文泥沙特征及人类活动因素,研究海底冲淤变化的主要影响因素。综合分析表明：2011年以前岱山西北海岸岸线稳定,岸滩经历了由滩淤槽冲转为滩冲槽冲的动态演变过程,除岱山西部与大鱼山之间的槽沟局部地形变化较大外,其它海区冲淤速率不到10 cm/a,整个海域的侵蚀速率有加速趋势。2011年之后,岱山北部开始实施大规模围涂工程,岱山西北近岸5 m等深线以浅的岸滩发生1.75 m/a的淤积,而计算范围内的其它海区仍以微侵蚀为主。岱山西北海域泥沙主要以过境输移为主,长江来沙量的减少和近年围垦活动的增加是该海域海床冲淤演变的两个主要影响因素。     

连云港徐圩港区航道大风天强淤可能性分析

连云港海域流速不大,徐圩港区规划航道线南北两侧断面,平均流速在0.20～0.40 m/s;波浪作用相对较大,年平均H1/10最大波高为3.58 m;徐圩港区南部紧邻粉沙质区,位于粉沙向淤泥过渡的边缘地带;徐圩港区底质沉积物主要以细颗粒为主,中值粒径一般都在0.01 mm以下,粘土含量在30%以上,属于淤泥质海岸性质;海域年平均含沙量在0.20 kg/m3左右,近岸河口或浅滩表层平均含沙量在0.10～0.20 kg/m3,外海域表层平均含沙量在0.1 kg/m3以下;台风期间海域含沙量骤增,近底层含沙量可达5.0 kg/m3以上。根据国内其他港口大风天回淤问题的研究经验和对骤淤(或强淤)条件的分析以及与连云港港区的对比分析,认为徐圩港区航道开辟后,也会出现大风天强淤情况,但淤积的形式应完全不同于粉沙质海岸。     

大鱼山填海工程对海床冲淤变化影响分析*

根据舟山大鱼山海域1960—2021年间5个年份的水深地形资料,基于GIS（地理信息系统）技术采用数字化定量冲淤计算和特征等深线叠加方法,对工程附近典型水下地形的平面冲淤和平面形态变化规律进行研究,探讨大鱼山填海工程对周边海床冲淤变化的影响。结果表明：自然状态下,研究区整体处于轻微冲刷状态;填海后,南侧深槽近岸淤积,外侧和北侧深槽继续冲刷,东西两侧浅滩呈现大幅度淤积。大鱼山填海工程极大地改变了原本岸线分布以及周边水动力泥沙环境,最终导致填海区附近海床冲淤变化,但整体仍维持海底的潮滩分布格局。     

厦门双鱼岛游艇码头潮流泥沙数学模型试验研究

文章围绕厦门双鱼岛游艇码头工程方案有关潮流泥沙问题进行了研究。收集并分析了工程附近水域的自然条件,掌握了工程海域水动力及泥沙运动特点和海床冲淤演变特征,在此基础上使用二维潮流泥沙数学模型对开发方案实施后的潮流场、泥沙场、地形冲淤变化开展了数值模拟研究工作。从潮流动力、地形冲淤等方面分析了方案对周边海域水动力的影响。     

大型海岸工程对水流和泥沙运动的影响研究

在淤泥质海岸建设大型海岸工程,会对周边海域的水沙环境产生一定影响。文章以连云港为例,应用波浪潮流泥沙数学模型,模拟计算了连云港海域大型海岸工程实施后对于水流泥沙运动的影响。研究结果表明:连云港区、徐圩港区以及灌河口双导堤工程实施后,工程区以外的大范围海域潮流场和含沙量场基本没有改变,变化主要集中在工程区和工程区附近近岸海域,总体呈现出动力减弱、含沙量减少的趋势。     

港口开发建设对田湾核电站取水工程的影响

建立了基于不规则三角形网格潮流泥沙数学模型,在对模型进行充分验证的基础上,对连云港港口扩建(旗台港区建设)规划方案和埒子口港区规划对田湾核电站已建取水工程的影响进行了数值模拟研究,计算了取水口附近滩面的冲淤变化和等深线位移。研究结果表明:连云港港口扩建及埒子口港区规划实施后,已建的田湾核电站取水明渠口门附近水域变成泥沙淤积环境,滩面将会淤高,设计的取水口门水深等深线将会外移,核电站正常取水将会受到影响。     

连云港区25万吨级航道和徐圩港区5万吨级航道常年回淤观测与研究

连云港港30万吨级航道一期工程自建设期开始分阶段、分航段开展了回淤观测。连云港区25万吨级航道和徐圩港区5万吨级航道常年回淤观测表明,航道实际回淤情况好于预期,其中旗台防波堤口门段减淤效果十分明显。结合底质采样、地形测量、风浪资料,利用数模计算,进一步深化了对航道回淤规律和回淤机理的研究,为连云港港30万吨级航道二期工程研究设计提供了技术支撑。     

曹妃甸围填海工程对海床冲淤的影响预测分析

通过建立曹妃甸海域平面二维悬沙输移扩散和床面冲淤变化数学模型,预测分析了2005年和2013年曹妃甸围填海工程对海床冲淤环境的影响,得出曹妃甸海域的海床年冲淤变化特征。结果表明,从2005～2013年9年间曹妃甸围填海工程实施后海域仍呈现整体冲刷趋势,北部近岸海域及围填海形成的港池则呈淤积态势,海床冲淤强度没有明显的变化。     

粤东大亚湾水沙环境及岸滩演变分析

根据现场实测水文泥沙及地形资料,对大亚湾海域的自然条件、水沙环境特征及岸滩演变特征进行分析,研究结果表明：大亚湾潮差较小,波浪和潮流动力弱,水体含沙量较低,泥沙来源有限,主要来自近岸附近滩面就地搬运的少量泥沙。湾内底质多为黏土质粉砂,呈现淤积质海岸的沉积特点。因此大亚湾海域水清沙少,自然状态下海床长期保持稳定。近期受港口航道建设、围填海等人类活动的影响,部分海床地形出现较大幅度的冲淤变化。湾内港池、航道疏浚开挖后航槽稳定,回淤强度较小。正确认识该海域的水动力条件、泥沙运移及海床冲淤变化,不仅是开展海岸工程开发建设的关键技术问题,也有利于近岸海洋环境保护及资源开发利用。     

洋山深水港四期工程港区增深可行性研究

根据洋山深水港区近期(2009年~2013年)的现场观测资料,通过对多年实测资料的对比分析和数值模拟,深入研究了洋山港海域冲淤变化和四期港区泥沙淤积情况。其结论显示:大小洋山主通道海域海床总体稳定,西北部局部的冲刷环境为四期港区港池航道的增深创造了有利条件,预测洋山深水港区四期工程港池和航道的年回淤强度为1.0~2.0 m,接近二期港区的实际淤强,计算回淤量为457~881万m3,二期工程港池和外航道的成功开挖,表明港区的增深可以实现。     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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第34届海洋、离岸及极地工程国际会议(英文)

正St.John's,Newfoundland,Canada,May 31-June 5,2015 OMAE2015 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to: meet and present advances in technology and its scientific support;     

33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to:·meet and present advances in technology and its scientific support;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.